BLUNT CEREBROVASCULAR INJURIES

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Clay Cothren, Ernest E. Moore" "autores" => array:2 [ 0 => array:3 [ "nombre" => "C. Clay" "apellidos" => "Cothren" "email" => array:1 [ 0 => "clay.cothren@dhha.org" ] ] 1 => array:2 [ "nombre" => "Ernest E." "apellidos" => "Moore" ] ] "afiliaciones" => array:2 [ 0 => array:2 [ "entidad" => "Department of Surgery, Denver Health Medical Center - Denver/CO, USA" "identificador" => "aff1" ] 1 => array:2 [ "entidad" => "University of Colorado Health Sciences Center - Denver/CO, USA" "identificador" => "aff2" ] ] ] ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:7 [ "identificador" => "fig2" "etiqueta" => "Figure 2" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr2.jpeg" "Alto" => 1137 "Ancho" => 993 "Tamanyo" => 109460 ] ] "descripcion" => array:1 [ "en" => "Denver screening and treatment algorithm for BCVI" ] ] ] "textoCompleto" => "Over the past decade, a wealth of studies has provided the scientific rationale for promoting the early screening and treatment of blunt cerebrovascular injuries (BCVI). Initially, BCVI were thought to have unavoidable, devastating neurologic outcomes, but several reports have suggested that anticoagulant therapy improves neurologic outcome in patients suffering ischemic neurologic events.<a class="elsevierStyleCrossRefs" href="#bib1">1–7</a> If untreated, carotid artery injuries (CAI) have a stroke rate up of to 50% depending on the injury grade, with increasing stroke rates correlated with increasing grades of injury; vertebral artery injuries (VAI) have a stroke rate of 25%.<a class="elsevierStyleCrossRef" href="#bib3">3</a> Because many of the patients with BCVI have concomitant traumatic brain injuries, poor outcomes due to neurologic sequelae to BCVI have been attributed to the traumatic brain injury. Screening protocols based on patient injury patterns and mechanism of injury have been instituted prior to neurologic sequelae to identify these injuries in asymptomatic patients and to initiate stroke-preventative treatment. Current studies suggest that early antithrombotic therapy in patients with BCVI reduces stroke rates and prevents neurologic morbidity.<a class="elsevierStyleCrossRefs" href="#bib1">1,3,4,8–11</a>Historical PerspectiveBlunt cerebrovascular injuries were first recognized more than 30 years ago,<a class="elsevierStyleCrossRef" href="#bib12">12</a> but the majority of patients with BCVI presented with symptoms of neurologic ischemia.<a class="elsevierStyleCrossRefs" href="#bib12">12–16</a> The patient's presenting symptom of cerebral ischemia may reveal the underlying cerebrovascular injury. Carotid artery injuries generally result in contralateral sensorimotor deficits, while VAIs typically manifest as ataxia, dizziness, vomiting, facial or body analgesia, or visual field defects. Aphasia may be present if the dominant hemisphere is involved, while nondominant hemisphere strokes may result in hemineglect. Symptoms of carotid-cavernous fistulae include orbital pain, exophthalmos, chemosis, and conjunctival hyperemia.Crissey and Bernstein postulated 3 fundamental mechanisms of injury: direct blow to the neck, hyperextension with contralateral rotation of the head, and laceration of the artery by adjacent fractures involving the sphenoid or petrous bones.<a class="elsevierStyleCrossRef" href="#bib12">12</a> The most common mechanism causing CAI is hyperextension resulting from the stretching of the carotid artery over the lateral articular processes of C1-C3.<a class="elsevierStyleCrossRefs" href="#bib13">13–18</a> Vertebral artery injuries are likely a combination of direct injury, due to associated fractures of the vertebrae involving the transverse foramen through which the artery courses, and hyperextension-stretch injury due to the tethering of the vertebral artery within the lateral masses of the cervical spine. Regardless of mechanism, there is intimal disruption of the carotid or vertebral artery. This intimal tear becomes a nidus for platelet aggregation that may lead to emboli or vessel occlusion.Following the recognition that BCVI were responsible for adverse neurologic events in some patients, treatment modalities were debated. The vast majority of these lesions occur in surgically inaccessible areas of the blood vessels, either high within the carotid canal at the base of the skull or within the foramen transversarium. Such a location makes the standard vascular repair approaches including reconstruction or thrombectomy challenging if not impossible. Heparin was initially the treatment of choice for BCVI, with the assumption that this promoted clot stabilization if present and clot resolution through intrinsic fibrinolytic mechanisms, and it prevented further thrombosis.<a class="elsevierStyleCrossRefs" href="#bib5">5,7,8</a> Treatment with anticoagulant agents has been shown to improve neurologic outcome in patients sustaining BCVI-related ischemic neurologic events (INE).<a class="elsevierStyleCrossRefs" href="#bib5">5,7–9</a> Initial reports, including one of a multicenter study by the Western Trauma Association, showed that patients who were treated with anticoagulant agents had improved outcome compared to those who were either not treated or had a contraindication for anticoagulation due to associated head injuries.<a class="elsevierStyleCrossRefs" href="#bib5">5,7</a> In these studies, up to 45% of patients achieved good neurologic status. The first single-institution study with a large volume of experience demonstrated heparin therapy was independently associated with survival and improvement in neurologic outcomes.<a class="elsevierStyleCrossRef" href="#bib8">8</a> Follow-up evaluations by other institutions support the use of anticoagulation after the onset of neurologic symptoms to improve overall functional outcome.<a class="elsevierStyleCrossRefs" href="#bib4">4,9,19</a> Although the initial focus of BCVI was recognizing the injury and treating the devastating neurologic sequelae, subsequent efforts have been directed at diagnosing and treating these injuries during the “silent period,” prior to the onset of stroke.BCVI Screening during the “Silent Period”Although some patients may present with symptoms within an hour of injury, the majority exhibit a latent period. This asymptomatic phase has been inferred based upon the time to onset of symptoms in patients who did not receive antithrombotic therapy. This time frame appears to range from hours up to 14 years, but the majority of patients seem to develop symptoms within 10 to 72 hours.<a class="elsevierStyleCrossRefs" href="#bib3">3–5,17,18,20,21</a> Diagnosing BCVI during this “silent period” affords the opportunity for treatment prior to neurologic sequelae.Aggressive screening for BCVI was initially suggested in the mid-1990s<a class="elsevierStyleCrossRefs" href="#bib8">8,9</a> after recognition that specific patterns of injuries were associated.<a class="elsevierStyleCrossRefs" href="#bib5">5,7,22</a> Although optimal screening criteria are yet to be defined, current algorithms include patients with signs or symptoms, as well as those considered at high risk by the injury pattern<a class="elsevierStyleCrossRefs" href="#bib1">1,4,11,18</a> (<a class="elsevierStyleCrossRef" href="#tbl1">Table 1</a>). A recently published report questioned the utility of such an aggressive screening approach,<a class="elsevierStyleCrossRef" href="#bib23">23</a> while other studies have reported a screening yield of over 30% in high-risk populations.<a class="elsevierStyleCrossRefs" href="#bib1">1,2,4,11,24</a><elsevierMultimedia ident="tbl1"></elsevierMultimedia><elsevierMultimedia ident="tbl2"></elsevierMultimedia>Diagnostic Imaging and Injury Grading ScaleUntil the sensitivity and specificity of computed tomographic angiography (CTA) or magnetic resonance angiography (MRA) approaches that of angiography, 4-vessel arteriography remains the gold standard for diagnosing BCVI. Undoubtedly, many clinicians question the need for subjecting patients to angiography. Angiography is labor intensive, costly, and not without risks; additionally, if not available at smaller hospitals, it requires emergent transfer of a patientfor definitive evaluation. Currently, CTA remains an unproven diagnostic modality for this injury, with a sensitivity of between 50% to 68%.<a class="elsevierStyleCrossRefs" href="#bib2">2,3,25</a> In particular, injuries that may be missed by such noninvasive studies are typically grade I and II injuries; however, pseudoaneurysms and occlusions have also been misdiagnosed.<a class="elsevierStyleCrossRefs" href="#bib2">2,3</a> The risk associated with angiography in our screened trauma population was 0.1%, while the stroke risk for an undiagnosed grade I CAI is 8% and of VAI is 6%.<a class="elsevierStyleCrossRefs" href="#bib3">3,4</a> While advances in technology with improved imaging by multislice CT scanners may become an alternative in the future, until these modalities are evaluated with follow-up angiography, standard 4-vessel angiography remains the standard of care.All patients with indications for screening and no contraindications for antithrombotic therapy undergo angiography as soon as possible. In our institution, patients admitted during daytime hours undergo angiography prior to transport to the surgical intensive care unit from the emergency department unless an urgent operation intervenes; patients evaluated after daylight hours undergo angiography the morning following admission. If the patient is symptomatic on admission, emergent angiography is performed.Along with the recognition of varied luminal irregularities comprising BCVI (dissection, occlusion, transection, and pseudoaneurysms) was the identification of disparate outcomes.<a class="elsevierStyleCrossRefs" href="#bib5">5,8</a> An injury grading scale was developed<a class="elsevierStyleCrossRef" href="#bib18">18</a> to provide not only an accurate description of the injury, but also to define stroke risk by injury grade. Untreated injuries have an overall stroke rate of 21% to 64%,<a class="elsevierStyleCrossRefs" href="#bib1">1,11</a> CAIs have increasing stroke rate by increasing grade, and VAIs tend to have a more consistent stroke rate of approximately 20% for all grades of injury<a class="elsevierStyleCrossRef" href="#bib3">3</a> (<a class="elsevierStyleCrossRef" href="#tbl3">Table 3</a>). <a class="elsevierStyleCrossRef" href="#fig1">Figure 1</a> shows representative angiographic images of different grades of BCVI.<elsevierMultimedia ident="tbl3"></elsevierMultimedia><elsevierMultimedia ident="fig1"></elsevierMultimedia>Patients undergo repeat arteriography 7 to 10 days after their initial diagnostic study. The importance of routine follow-up arteriography is particularly salient for patients with grade I and II injuries; over half of grade I injuries completely heal, allowing cessation of antithrombotic therapy.<a class="elsevierStyleCrossRef" href="#bib3">3</a> While only 8% of grade II injuries healed in this study, over 40% progressed to grade III injuries despite therapy; in patients with CAI, this increase in injury grade also correlates with an increase in stroke risk. Some authors have advocated an endovascular approach to pseudoaneurysms, hence supporting the use of repeat angiography for diagnosis of such lesions. Our most recent evaluation of endovascular stents in patients with postinjury BCVI, however, suggests that antithrombotic therapy remains the gold standard treatment.<a class="elsevierStyleCrossRef" href="#bib10">10</a> Patients with carotid or vertebral artery occlusions may not require reimaging, as 82% showed no change on follow-up imaging.<a class="elsevierStyleCrossRef" href="#bib3">3</a>Treatment: AntithromboticsInitially, therapy for BCVI was based on anecdotal reports of neurologic improvement with heparinization in patients suffering stroke related to BCVI.<a class="elsevierStyleCrossRefs" href="#bib5">5,7,8</a> Subsequently, intravenous heparin was thought to be the treatment of choice for those asymptomatic patients with blunt injuries.<a class="elsevierStyleCrossRefs" href="#bib2">2,3</a> Initially, standard heparinization protocols were used, but due to a moderate incidence of bleeding in multisystem trauma patients, we modified our protocol.<a class="elsevierStyleCrossRefs" href="#bib9">9,18</a> Currently, anticoagulation with systemic heparin is initiated using a continuous infusion of heparin at 15 U/kg/h, without a loading dose; heparin drips are titrated to achieve a partial thromboplastin time (PTT) of between 40 and 50 seconds. With this adjustment in our BCVI heparin protocol, fewer than 1% of patients have had bleeding complications necessitating transfusion.<a class="elsevierStyleCrossRef" href="#bib4">4</a> For patients with contraindications for heparin, the initiation of antiplatelet agents (aspirin 325 mg/d and clopidogrel 75 mg/d) has gained favor.<a class="elsevierStyleCrossRefs" href="#bib3">3,21,26</a> It should be noted that antithrombotic therapy is not started with patients having closed head injury or intraparenchymal hemorrhage without input from the neurosurgery service.Admittedly, there is controversy regarding the ideal antithrombotic therapy—anticoagulant versus antiplatelet agents—for any type of arterial disease.<a class="elsevierStyleCrossRefs" href="#bib27">27–29</a> A retrospective study by Chimowitz et al<a class="elsevierStyleCrossRef" href="#bib30">30</a> indicated that warfarin is superior in patients with vertebrobasilar occlusive disease, while a more recent prospective double-blind comparison by the same authors demonstrated aspirin is the therapy of choice for patients with symptomatic intracranial atherosclerotic arterial stenosis, due to equivalent stroke prevention rates as for warfarin, but decreased hemorrhagic complications.<a class="elsevierStyleCrossRef" href="#bib30">30</a> A recent review of vertebrobasilar disease supported the use of antiplatelet agents in patients with arterial stenosis but warfarin in patients with severe, flow-limiting lesions or dissections.<a class="elsevierStyleCrossRef" href="#bib31">31</a> The selection of which therapeutic agent should be used and whether the choice of antithrombotic should be determined by the patient's injury grade must continue to be evaluated in prospective studies.Most importantly, patients who are diagnosed early and treated with antithrombotics almost universally avoid INE.<a class="elsevierStyleCrossRefs" href="#bib2">2,4</a>The Memphis group showed a reduction in stroke rate for CAI from 64% in untreated patients to 6.8% in treated patients (either with anticoagulant or antiplatelet agents), and for VAI a reduction in stroke rate from 54% to 2.6% in untreated versus treated patients. Our group's most recent evaluation demonstrated a stroke rate of 0.5% in 187 patients with BCVI treated with antithrombotics, while untreated patients had an overall stroke rate of 21%.<a class="elsevierStyleCrossRef" href="#bib10">10</a> Although the optimal regimen remains undetermined, there appears to be equivalence between the two therapies.<a class="elsevierStyleCrossRefs" href="#bib2">2–4</a> To determine the ideal therapeutic regimen for BCVI, we are currently enrolling patients in a prospective randomized study comparing antiplatelet agents to intravenous heparin in patients with grades I to III injuries. With an attendant permanent neurologic morbidity of up to 80% and mortality rates of up to 40%,<a class="elsevierStyleCrossRefs" href="#bib20">20,32,33</a> prompt treatment of diagnosed injuries is critical.Treatment: Endovascular StentsOver the past decade, there has been an explosion in the use of percutaneous transluminal arterial interventions for both traumatic injuries and atherosclerotic lesions. Although the role of carotid stents for atherosclerotic disease is being explored with randomized, well-controlled trials,<a class="elsevierStyleCrossRefs" href="#bib34">34–37</a> the indication for percutaneous intervention for traumatic injuries is less well defined. Carotid stents have been utilized in patients with blunt injury with persistent pseudoaneurysms because of concern about subsequent embolization or rupture.<a class="elsevierStyleCrossRefs" href="#bib38">38,39</a> In theory, the uncovered carotid stent acts as a filter to trap any thrombus within the pseudoaneurysm, thereby preventing subsequent embolization and stroke. The stent may also decrease flow into the pseudoaneurysm by increasing laminar flow within the stented portion of the carotid lumen itself.<a class="elsevierStyleCrossRef" href="#bib40">40</a> Decreasing flow into the aneurysmal sac may then reduce any egress of blood from the sac, which in turn may reduce turbulence within the lumen.Several isolated case reports have advocated the use of percutaneous angioplasty and stenting of carotid injures.<a class="elsevierStyleCrossRefs" href="#bib41">41–47</a> Not surprisingly, these case reports represent a diverse range of pathologies, symptoms, mechanisms of injury, and time to diagnosis. Although the majority appears to have patency of the stented carotid artery documented in follow-up radiographic evaluations, several cases of carotid artery occlusion following stent placement have been reported.<a class="elsevierStyleCrossRefs" href="#bib42">42,44</a> Our most recent evaluation indicates a prohibitive stroke and carotid occlusion rate associated with carotid stents placed in acutely injured vessels<a class="elsevierStyleCrossRef" href="#bib11">11</a>; additionally, long-term follow-up in patients with traumatic pseudoaneurysms who were treated with anticoagulant therapy alone has not been evaluated. Further understanding and evaluation of the role of appropriate concurrent antithrombotic therapy, as well as evolving stent technology including smaller delivery systems and covered stents, may improve the outcome for postinjury intraluminal carotid stents. In the interim, however, our experience to date suggests that carotid stenting should be performed in selective cases, and antithrombotic therapy should remain the cornerstone of treatment for posttraumatic pseudoaneurysms.Long-Term Treatment and OutcomesFollowing initiation of antithrombotics, treatment is empirically continued for 6 months. Our current protocol is to transition the patient to warfarin if the initial antithrombotic therapy was heparin, with a goal INR (international normalized ratio) of 2.0. If the patient was started on antiplatelet agents, these are continued after hospital discharge. Although complete healing of grade I injuries on repeat angiography at 7-10 days has been documented in more than half of affected patients, the vast majority of grade II, III, and IV injuries persist. Comprehensive long-term follow-up beyond the acute hospitalization has not been reported in the literature, as is true in most trauma population studies. Therefore, whether these injuries heal or persist at 3 to 6 months is unknown. There are anecdotal reports of carotid pseudoaneurysm rupture, particularly in the petrous portion of the canal leading to epistaxis.<a class="elsevierStyleCrossRefs" href="#bib48">48–53</a> However, aside from these limited cases located intracranially, few other reports are evident in the literature.<a class="elsevierStyleCrossRefs" href="#bib54">54,55</a> With so little long-term data, it is difficult to ascertain either the true healing rate of these injuries or the risk of rupture or embolic stroke.The morbidity and mortality of BCVI-related INEs is well documented. Stroke-related need for discharge and overall rate of discharge to rehabilitation services is higher in patients suffering BCVI-related INE.<a class="elsevierStyleCrossRef" href="#bib10">10</a> Such prolonged acute patient care increases costs to patients, to insurance companies, and ultimately to society. Although delineating the precise BCVI-related costs within a patient's acute or rehab stay is difficult in multisystem trauma patients, calculating the cost of a patient's life is even more problematic. is even more problematic. Mortality due to BCVI is significant, with CAI patients having a 13% to 21% stroke-related mortality and patients with VAI-related strokes having a 4% to 18% mortality rate in modern series.<a class="elsevierStyleCrossRefs" href="#bib1">1,11</a> The impact on mortality due to BCVI-related strokes appears independent of the patient's associated injuries. Overall mortality in patients sustaining CAI was 7% for those without a neurologic event versus 32% for those with a neurologic event; in patients with VAI, those without neurologic event had a mortality of 7% while those with a neurologic event had a mortality rate of 18%; the ISS (illness severity scale) was not significantly different between those with and without INE.<a class="elsevierStyleCrossRef" href="#bib10">10</a>Repeat evaluation of the patient's injury and a determination of antithrombotic therapy should be considered at 6 months. Although no long-term studies have been performed to date, we currently recommend CTA for patients with initially diagnosed grade III and IV injuries, and angiography for grade I and II injuries. If the patient does not wish to undergo angiography with its attendant risks, we empirically consider placing the patient on life-long aspirin. Similarly, patients with persistent grade III and IV injuries on repeat imaging are empirically continued on life-long aspirin.CONCLUSIONSDiagnosis and treatment of blunt cerebrovascular injuries has evolved over the past 3 decades. Currently, protocols exist for establishing an indication for angiographic screening based on the injury mechanism and associated injuries,<a class="elsevierStyleCrossRef" href="#bib7">7</a> hence limiting invasive procedures to those with the highest risk of injury (<a class="elsevierStyleCrossRef" href="#fig2">Figure 2</a>). Following identification of injuries in asymptomatic patients, prompt initiation of antithrombotic therapy reduces the incidence of ischemic neurologic events. Surgeons caring for the multiply injured should screen for carotid and vertebral artery injuries in high-risk patients.<elsevierMultimedia ident="fig2"></elsevierMultimedia>" "textoCompletoSecciones" => array:1 [ "secciones" => array:10 [ 0 => array:2 [ "identificador" => "xpalclavsec1585337" "titulo" => "KEYWORDS" ] 1 => array:2 [ "identificador" => "xpalclavsec1585338" "titulo" => "PALAVRAS-CHAVE" ] 2 => array:2 [ "identificador" => "cesec10" "titulo" => "Historical Perspective" ] 3 => array:2 [ "identificador" => "cesec20" "titulo" => "BCVI Screening during the “Silent Period”" ] 4 => array:2 [ "identificador" => "cesec30" "titulo" => "Diagnostic Imaging and Injury Grading Scale" ] 5 => array:2 [ "identificador" => "cesec40" "titulo" => "Treatment: Antithrombotics" ] 6 => array:2 [ "identificador" => "cesec50" "titulo" => "Treatment: Endovascular Stents" ] 7 => array:2 [ "identificador" => "cesec60" "titulo" => "Long-Term Treatment and Outcomes" ] 8 => array:2 [ "identificador" => "cesec70" "titulo" => "CONCLUSIONS" ] 9 => array:1 [ "titulo" => "REFERENCES" ] ] ] "pdfFichero" => "main.pdf" "tienePdf" => true "fechaRecibido" => "2005-07-25" "fechaAceptado" => "2005-09-09" "PalabrasClave" => array:2 [ "en" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "KEYWORDS" "identificador" => "xpalclavsec1585337" "palabras" => array:7 [ 0 => "Artery" 1 => "Carotid" 2 => "Blunt" 3 => "Cerebrovascular" 4 => "Stroke" 5 => "Injury" 6 => "Vertebral" ] ] ] "pt" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "PALAVRAS-CHAVE" "identificador" => "xpalclavsec1585338" "palabras" => array:7 [ 0 => "Artéria" 1 => "Carótida" 2 => "Contuso" 3 => "Cerebrovascular" 4 => "Infarto" 5 => "Ferimento" 6 => "Vertebral" ] ] ] ] "tieneResumen" => true "resumen" => array:2 [ "en" => array:1 [ "resumen" => "Over the past decade, the recognition and subsequent management of blunt cerebrovascular injuries has undergone a marked evolution. Originally thought to be a rare occurrence, blunt cerebrovascular injuries are now diagnosed in approximately 1% of blunt trauma patients. The recognition of a clinically silent period allows for angiographic screening for injuries based upon the mechanism of trauma and the patient's constellation of injuries. Comprehensive screening of patients has resulted in the early diagnosis of blunt cerebrovascular injuries during the asymptomatic phase, thus allowing treatment that could prevent neurologic sequelae. Although the ideal regimen of antithrombotic therapy is yet to be determined, treatment with either antiplatelet or anticoagulant agents has been shown to reduce the blunt cerebrovascular injuries related stroke rate. Blunt cerebrovascular injury is a rare but potentially devastating injury; appropriate angiographic screening in high-risk patients should be performed and prompt treatment initiated to prevent ischemic neurologic events." ] "pt" => array:2 [ "resumen" => "RESUMODurante a década passada, o reconhecimento e tratamento do traumatismo cerebrovascular contuso, sofreu importante evolução. Este tipo de ferimento era considerado como ocorrência rara, mas atualmente o quadro é diagnosticado em cerca de 1% dos pacientes. O reconhecimento da existência de um período clínico silencioso permite uma seleção angiográfica baseada no mecanismo de trauma e na sistematização dos ferimentos dos pacientes. A avaliação sistemática e a suspeita diagnóstica precoce destes pacientes tem resultado em rápido confirmação durante a fase assintomática, permitindo a instauração de tratamento cuja meta é impedir o desenvolvimento de seqüelas neurológicas. Embora o tratamento ideal, antitrombótico, ainda precise ser determinado, o uso de agentes antiplaquetários ou anticoagulantes reduz a incidência de lesões cerebrovasculares relacionada a fenômenos tromboembolíticos.O traumatismo cerebrovascular contuso é raro, porém devastador. A seleção angiográfica apropriada em pacientes de alto risco deve ser realizada e o tratamento deve ser imediatamente iniciado para impedir eventos neurológicos isquêmicos." "secciones" => array:1 [ 0 => array:2 [ "identificador" => "ceabs20" "titulo" => "RESUMO" ] ] ] ] "multimedia" => array:5 [ 0 => array:7 [ "identificador" => "fig1" "etiqueta" => "Figure 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 1055 "Ancho" => 1491 "Tamanyo" => 160144 ] ] "descripcion" => array:1 [ "en" => "Representative angiographic images of different grades of BCVI Injury Grade: Angiographic Finding; Grade I: Intimal Irregularity, <25% Luminal Stenosis; Grade II: Intimal Irregularity, >25% Luminal Stenosis, Intimal Flap; Grade III: Pseudoaneurysm; Grade IV: Occlusion; Grade V: Transection with active extravasation." ] ] 1 => array:7 [ "identificador" => "fig2" "etiqueta" => "Figure 2" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr2.jpeg" "Alto" => 1137 "Ancho" => 993 "Tamanyo" => 109460 ] ] "descripcion" => array:1 [ "en" => "Denver screening and treatment algorithm for BCVI" ] ] 2 => array:7 [ "identificador" => "tbl1" "etiqueta" => "Table 1" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "tabla" => array:1 [ "tablatextoimagen" => array:1 [ 0 => array:1 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><tbody title="tbody"><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Signs/Symptoms of BCVI \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Arterial hemorrhage \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Cervical bruit in patient < 50 years of age \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Expanding cervical hematoma \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Focal neurologic deficit \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Neurologic exam incongruous with head CT scan findings \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Stroke on secondary CT scan \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Risk Factors for BCVI \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">High-energy transfer mechanism with: \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">LeForte II or III fracture \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Cervical-spine fracture patterns: subluxation, fractures extending into the transverse foramen, fractures of C1-C3 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Basilar skull fracture with carotid canal involvement \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Diffuse axonal injury with a Glascow Coma Scale (GCS) score < 6 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Near hanging with anoxic brain injury \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] ] ] ] "descripcion" => array:1 [ "en" => "Denver screening criteria for blunt cerebrovascular injury (BCVI)" ] ] 3 => array:7 [ "identificador" => "tbl3" "etiqueta" => "Table 3" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "tabla" => array:1 [ "tablatextoimagen" => array:1 [ 0 => array:1 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col"> \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col">Grade of injury \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col">Stroke rate \t\t\t\t\t\t\n \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Carotid artery injuries \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">I \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">3% \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">II \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">14% \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">III \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">26% \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">IV \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">50% \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">V \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">100% \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Vertebral artery injuries \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">I \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">6% \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">II \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">38% \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">III \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">27% \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">IV \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">28% \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">V \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">100% \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] ] ] ] "descripcion" => array:1 [ "en" => "Stroke rate by blunt cerebrovascular injury grade" ] ] 4 => array:7 [ "identificador" => "tbl2" "etiqueta" => "Table 2" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => false "mostrarDisplay" => true "tabla" => array:1 [ "tablatextoimagen" => array:1 [ 0 => array:1 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><tbody title="tbody"><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Grade I: \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">irregularity of the vessel wall or a dissection/intramural hematoma with less than 25% luminal stenosis \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Grade II: \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">intraluminal thrombus or raised intimal flap is visualized, or dissection/intramural hematoma with 25% or more luminal narrowing \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Grade III: \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">pseudoaneurysm \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Grade IV: \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">vessel occlusion \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Grade V: \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">vessel transection \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] ] ] ] "descripcion" => array:1 [ "en" => "Denver grading scale for blunt cerebrovascular injuries" ] ] ] "bibliografia" => array:2 [ "titulo" => "REFERENCES" "seccion" => array:1 [ 0 => array:2 [ "identificador" => "cebibsec10" "bibliografiaReferencia" => array:55 [ 0 => array:3 [ "identificador" => "bib1" "etiqueta" => "1" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Blunt cerebrovascular injuries: diagnosis and treatment" "autores" => array:1 [ 0 => array:2 [ "etal" => true "autores" => array:6 [ 0 => """ PR Miller \n \t\t\t\t\t\t\t\t """ 1 => """ TC Fabian \n \t\t\t\t\t\t\t\t """ 2 => """ TK Bee \n \t\t\t\t\t\t\t\t """ 3 => """ S Timmons \n \t\t\t\t\t\t\t\t """ 4 => """ A Chamsuddin \n \t\t\t\t\t\t\t\t """ 5 => """ R Finkle \n \t\t\t\t\t\t\t\t """ ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.1097/00005373-200108000-00009" "Revista" => array:6 [ "tituloSerie" => "J Trauma" "fecha" => "2001" "volumen" => "51" "paginaInicial" => "279" "paginaFinal" => "285" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/11493785" "web" => "Medline" ] ] ] ] ] ] ] ] 1 => array:3 [ "identificador" => "bib2" "etiqueta" => "2" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Prospective screening for blunt cerebrovascular injuries: analysis of diagnostic modalities and outcomes" "autores" => array:1 [ 0 => array:2 [ "etal" => true "autores" => array:6 [ 0 => """ PR Miller \n \t\t\t\t\t\t\t\t """ 1 => """ TC Fabian \n \t\t\t\t\t\t\t\t """ 2 => """ MA Croce \n \t\t\t\t\t\t\t\t """ 3 => """ C Cagiannos \n \t\t\t\t\t\t\t\t """ 4 => """ JS Williams \n \t\t\t\t\t\t\t\t """ 5 => """ M Vang \n 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C. Clay Cothren, Ernest E. Moore

Department of Surgery, Denver Health Medical Center - Denver/CO, USA

University of Colorado Health Sciences Center - Denver/CO, USA

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          1 => array:2 [
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          "en" => "<p id="spara30" class="elsevierStyleSimplePara elsevierViewall">Denver screening and treatment algorithm for BCVI</p>"
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    "textoCompleto" => "<span class="elsevierStyleSections"><p id="para10" class="elsevierStylePara elsevierViewall">Over the past decade&#44; a wealth of studies has provided the scientific rationale for promoting the early screening and treatment of blunt cerebrovascular injuries &#40;BCVI&#41;&#46; Initially&#44; BCVI were thought to have unavoidable&#44; devastating neurologic outcomes&#44; but several reports have suggested that anticoagulant therapy improves neurologic outcome in patients suffering ischemic neurologic events&#46;<a class="elsevierStyleCrossRefs" href="#bib1"><span class="elsevierStyleSup">1&#8211;7</span></a> If untreated&#44; carotid artery injuries &#40;CAI&#41; have a stroke rate up of to 50&#37; depending on the injury grade&#44; with increasing stroke rates correlated with increasing grades of injury&#59; vertebral artery injuries &#40;VAI&#41; have a stroke rate of 25&#37;&#46;<a class="elsevierStyleCrossRef" href="#bib3"><span class="elsevierStyleSup">3</span></a> Because many of the patients with BCVI have concomitant traumatic brain injuries&#44; poor outcomes due to neurologic sequelae to BCVI have been attributed to the traumatic brain injury&#46; Screening protocols based on patient injury patterns and mechanism of injury have been instituted prior to neurologic sequelae to identify these injuries in asymptomatic patients and to initiate stroke-preventative treatment&#46; Current studies suggest that early antithrombotic therapy in patients with BCVI reduces stroke rates and prevents neurologic morbidity&#46;<a class="elsevierStyleCrossRefs" href="#bib1"><span class="elsevierStyleSup">1&#44;3&#44;4&#44;8&#8211;11</span></a></p><span id="cesec10" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle40">Historical Perspective</span><p id="para20" class="elsevierStylePara elsevierViewall">Blunt cerebrovascular injuries were first recognized more than 30 years ago&#44;<a class="elsevierStyleCrossRef" href="#bib12"><span class="elsevierStyleSup">12</span></a> but the majority of patients with BCVI presented with symptoms of neurologic ischemia&#46;<a class="elsevierStyleCrossRefs" href="#bib12"><span class="elsevierStyleSup">12&#8211;16</span></a> The patient&#39;s presenting symptom of cerebral ischemia may reveal the underlying cerebrovascular injury&#46; Carotid artery injuries generally result in contralateral sensorimotor deficits&#44; while VAIs typically manifest as ataxia&#44; dizziness&#44; vomiting&#44; facial or body analgesia&#44; or visual field defects&#46; Aphasia may be present if the dominant hemisphere is involved&#44; while nondominant hemisphere strokes may result in hemineglect&#46; Symptoms of carotid-cavernous fistulae include orbital pain&#44; exophthalmos&#44; chemosis&#44; and conjunctival hyperemia&#46;</p><p id="para30" class="elsevierStylePara elsevierViewall">Crissey and Bernstein postulated 3 fundamental mechanisms of injury&#58; direct blow to the neck&#44; hyperextension with contralateral rotation of the head&#44; and laceration of the artery by adjacent fractures involving the sphenoid or petrous bones&#46;<a class="elsevierStyleCrossRef" href="#bib12"><span class="elsevierStyleSup">12</span></a> The most common mechanism causing CAI is hyperextension resulting from the stretching of the carotid artery over the lateral articular processes of C1-C3&#46;<a class="elsevierStyleCrossRefs" href="#bib13"><span class="elsevierStyleSup">13&#8211;18</span></a> Vertebral artery injuries are likely a combination of direct injury&#44; due to associated fractures of the vertebrae involving the transverse foramen through which the artery courses&#44; and hyperextension-stretch injury due to the tethering of the vertebral artery within the lateral masses of the cervical spine&#46; Regardless of mechanism&#44; there is intimal disruption of the carotid or vertebral artery&#46; This intimal tear becomes a nidus for platelet aggregation that may lead to emboli or vessel occlusion&#46;</p><p id="para40" class="elsevierStylePara elsevierViewall">Following the recognition that BCVI were responsible for adverse neurologic events in some patients&#44; treatment modalities were debated&#46; The vast majority of these lesions occur in surgically inaccessible areas of the blood vessels&#44; either high within the carotid canal at the base of the skull or within the foramen transversarium&#46; Such a location makes the standard vascular repair approaches including reconstruction or thrombectomy challenging if not impossible&#46; Heparin was initially the treatment of choice for BCVI&#44; with the assumption that this promoted clot stabilization if present and clot resolution through intrinsic fibrinolytic mechanisms&#44; and it prevented further thrombosis&#46;<a class="elsevierStyleCrossRefs" href="#bib5"><span class="elsevierStyleSup">5&#44;7&#44;8</span></a> Treatment with anticoagulant agents has been shown to improve neurologic outcome in patients sustaining BCVI-related ischemic neurologic events &#40;INE&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib5"><span class="elsevierStyleSup">5&#44;7&#8211;9</span></a> Initial reports&#44; including one of a multicenter study by the Western Trauma Association&#44; showed that patients who were treated with anticoagulant agents had improved outcome compared to those who were either not treated or had a contraindication for anticoagulation due to associated head injuries&#46;<a class="elsevierStyleCrossRefs" href="#bib5"><span class="elsevierStyleSup">5&#44;7</span></a> In these studies&#44; up to 45&#37; of patients achieved good neurologic status&#46; The first single-institution study with a large volume of experience demonstrated heparin therapy was independently associated with survival and improvement in neurologic outcomes&#46;<a class="elsevierStyleCrossRef" href="#bib8"><span class="elsevierStyleSup">8</span></a> Follow-up evaluations by other institutions support the use of anticoagulation after the onset of neurologic symptoms to improve overall functional outcome&#46;<a class="elsevierStyleCrossRefs" href="#bib4"><span class="elsevierStyleSup">4&#44;9&#44;19</span></a> Although the initial focus of BCVI was recognizing the injury and treating the devastating neurologic sequelae&#44; subsequent efforts have been directed at diagnosing and treating these injuries during the &#8220;silent period&#44;&#8221; prior to the onset of stroke&#46;</p></span><span id="cesec20" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle50">BCVI Screening during the &#8220;Silent Period&#8221;</span><p id="para50" class="elsevierStylePara elsevierViewall">Although some patients may present with symptoms within an hour of injury&#44; the majority exhibit a latent period&#46; This asymptomatic phase has been inferred based upon the time to onset of symptoms in patients who did not receive antithrombotic therapy&#46; This time frame appears to range from hours up to 14 years&#44; but the majority of patients seem to develop symptoms within 10 to 72 hours&#46;<a class="elsevierStyleCrossRefs" href="#bib3"><span class="elsevierStyleSup">3&#8211;5&#44;17&#44;18&#44;20&#44;21</span></a> Diagnosing BCVI during this &#8220;silent period&#8221; affords the opportunity for treatment prior to neurologic sequelae&#46;</p><p id="para60" class="elsevierStylePara elsevierViewall">Aggressive screening for BCVI was initially suggested in the mid-1990s<a class="elsevierStyleCrossRefs" href="#bib8"><span class="elsevierStyleSup">8&#44;9</span></a> after recognition that specific patterns of injuries were associated&#46;<a class="elsevierStyleCrossRefs" href="#bib5"><span class="elsevierStyleSup">5&#44;7&#44;22</span></a> Although optimal screening criteria are yet to be defined&#44; current algorithms include patients with signs or symptoms&#44; as well as those considered at high risk by the injury pattern<a class="elsevierStyleCrossRefs" href="#bib1"><span class="elsevierStyleSup">1&#44;4&#44;11&#44;18</span></a> &#40;<a class="elsevierStyleCrossRef" href="#tbl1">Table 1</a>&#41;&#46; A recently published report questioned the utility of such an aggressive screening approach&#44;<a class="elsevierStyleCrossRef" href="#bib23"><span class="elsevierStyleSup">23</span></a> while other studies have reported a screening yield of over 30&#37; in high-risk populations&#46;<a class="elsevierStyleCrossRefs" href="#bib1"><span class="elsevierStyleSup">1&#44;2&#44;4&#44;11&#44;24</span></a></p><elsevierMultimedia ident="tbl1"></elsevierMultimedia><p id="para70" class="elsevierStylePara elsevierViewall"><elsevierMultimedia ident="tbl2"></elsevierMultimedia></p></span><span id="cesec30" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle60">Diagnostic Imaging and Injury Grading Scale</span><p id="para80" class="elsevierStylePara elsevierViewall">Until the sensitivity and specificity of computed tomographic angiography &#40;CTA&#41; or magnetic resonance angiography &#40;MRA&#41; approaches that of angiography&#44; 4-vessel arteriography remains the gold standard for diagnosing BCVI&#46; Undoubtedly&#44; many clinicians question the need for subjecting patients to angiography&#46; Angiography is labor intensive&#44; costly&#44; and not without risks&#59; additionally&#44; if not available at smaller hospitals&#44; it requires emergent transfer of a patient</p><p id="para90" class="elsevierStylePara elsevierViewall">for definitive evaluation&#46; Currently&#44; CTA remains an unproven diagnostic modality for this injury&#44; with a sensitivity of between 50&#37; to 68&#37;&#46;<a class="elsevierStyleCrossRefs" href="#bib2"><span class="elsevierStyleSup">2&#44;3&#44;25</span></a> In particular&#44; injuries that may be missed by such noninvasive studies are typically grade I and II injuries&#59; however&#44; pseudoaneurysms and occlusions have also been misdiagnosed&#46;<a class="elsevierStyleCrossRefs" href="#bib2"><span class="elsevierStyleSup">2&#44;3</span></a> The risk associated with angiography in our screened trauma population was 0&#46;1&#37;&#44; while the stroke risk for an undiagnosed grade I CAI is 8&#37; and of VAI is 6&#37;&#46;<a class="elsevierStyleCrossRefs" href="#bib3"><span class="elsevierStyleSup">3&#44;4</span></a> While advances in technology with improved imaging by multislice CT scanners may become an alternative in the future&#44; until these modalities are evaluated with follow-up angiography&#44; standard 4-vessel angiography remains the standard of care&#46;</p><p id="para100" class="elsevierStylePara elsevierViewall">All patients with indications for screening and no contraindications for antithrombotic therapy undergo angiography as soon as possible&#46; In our institution&#44; patients admitted during daytime hours undergo angiography prior to transport to the surgical intensive care unit from the emergency department unless an urgent operation intervenes&#59; patients evaluated after daylight hours undergo angiography the morning following admission&#46; If the patient is symptomatic on admission&#44; emergent angiography is performed&#46;</p><p id="para110" class="elsevierStylePara elsevierViewall">Along with the recognition of varied luminal irregularities comprising BCVI &#40;dissection&#44; occlusion&#44; transection&#44; and pseudoaneurysms&#41; was the identification of disparate outcomes&#46;<a class="elsevierStyleCrossRefs" href="#bib5"><span class="elsevierStyleSup">5&#44;8</span></a> An injury grading scale was developed<a class="elsevierStyleCrossRef" href="#bib18"><span class="elsevierStyleSup">18</span></a> to provide not only an accurate description of the injury&#44; but also to define stroke risk by injury grade&#46; Untreated injuries have an overall stroke rate of 21&#37; to 64&#37;&#44;<a class="elsevierStyleCrossRefs" href="#bib1"><span class="elsevierStyleSup">1&#44;11</span></a> CAIs have increasing stroke rate by increasing grade&#44; and VAIs tend to have a more consistent stroke rate of approximately 20&#37; for all grades of injury<a class="elsevierStyleCrossRef" href="#bib3"><span class="elsevierStyleSup">3</span></a> &#40;<a class="elsevierStyleCrossRef" href="#tbl3">Table 3</a>&#41;&#46; <a class="elsevierStyleCrossRef" href="#fig1">Figure 1</a> shows representative angiographic images of different grades of BCVI&#46;</p><elsevierMultimedia ident="tbl3"></elsevierMultimedia><elsevierMultimedia ident="fig1"></elsevierMultimedia><p id="para120" class="elsevierStylePara elsevierViewall">Patients undergo repeat arteriography 7 to 10 days after their initial diagnostic study&#46; The importance of routine follow-up arteriography is particularly salient for patients with grade I and II injuries&#59; over half of grade I injuries completely heal&#44; allowing cessation of antithrombotic therapy&#46;<a class="elsevierStyleCrossRef" href="#bib3"><span class="elsevierStyleSup">3</span></a> While only 8&#37; of grade II injuries healed in this study&#44; over 40&#37; progressed to grade III injuries despite therapy&#59; in patients with CAI&#44; this increase in injury grade also correlates with an increase in stroke risk&#46; Some authors have advocated an endovascular approach to pseudoaneurysms&#44; hence supporting the use of repeat angiography for diagnosis of such lesions&#46; Our most recent evaluation of endovascular stents in patients with postinjury BCVI&#44; however&#44; suggests that antithrombotic therapy remains the gold standard treatment&#46;<a class="elsevierStyleCrossRef" href="#bib10"><span class="elsevierStyleSup">10</span></a> Patients with carotid or vertebral artery occlusions may not require reimaging&#44; as 82&#37; showed no change on follow-up imaging&#46;<a class="elsevierStyleCrossRef" href="#bib3"><span class="elsevierStyleSup">3</span></a></p></span><span id="cesec40" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle70">Treatment&#58; Antithrombotics</span><p id="para130" class="elsevierStylePara elsevierViewall">Initially&#44; therapy for BCVI was based on anecdotal reports of neurologic improvement with heparinization in patients suffering stroke related to BCVI&#46;<a class="elsevierStyleCrossRefs" href="#bib5"><span class="elsevierStyleSup">5&#44;7&#44;8</span></a> Subsequently&#44; intravenous heparin was thought to be the treatment of choice for those asymptomatic patients with blunt injuries&#46;<a class="elsevierStyleCrossRefs" href="#bib2"><span class="elsevierStyleSup">2&#44;3</span></a> Initially&#44; standard heparinization protocols were used&#44; but due to a moderate incidence of bleeding in multisystem trauma patients&#44; we modified our protocol&#46;<a class="elsevierStyleCrossRefs" href="#bib9"><span class="elsevierStyleSup">9&#44;18</span></a> Currently&#44; anticoagulation with systemic heparin is initiated using a continuous infusion of heparin at 15 U&#47;kg&#47;h&#44; without a loading dose&#59; heparin drips are titrated to achieve a partial thromboplastin time &#40;PTT&#41; of between 40 and 50 seconds&#46; With this adjustment in our BCVI heparin protocol&#44; fewer than 1&#37; of patients have had bleeding complications necessitating transfusion&#46;<a class="elsevierStyleCrossRef" href="#bib4"><span class="elsevierStyleSup">4</span></a> For patients with contraindications for heparin&#44; the initiation of antiplatelet agents &#40;aspirin 325 mg&#47;d and clopidogrel 75 mg&#47;d&#41; has gained favor&#46;<a class="elsevierStyleCrossRefs" href="#bib3"><span class="elsevierStyleSup">3&#44;21&#44;26</span></a> It should be noted that antithrombotic therapy is not started with patients having closed head injury or intraparenchymal hemorrhage without input from the neurosurgery service&#46;</p><p id="para140" class="elsevierStylePara elsevierViewall">Admittedly&#44; there is controversy regarding the ideal antithrombotic therapy&#8212;anticoagulant versus antiplatelet agents&#8212;for any type of arterial disease&#46;<a class="elsevierStyleCrossRefs" href="#bib27"><span class="elsevierStyleSup">27&#8211;29</span></a> A retrospective study by Chimowitz et al<a class="elsevierStyleCrossRef" href="#bib30"><span class="elsevierStyleSup">30</span></a> indicated that warfarin is superior in patients with vertebrobasilar occlusive disease&#44; while a more recent prospective double-blind comparison by the same authors demonstrated aspirin is the therapy of choice for patients with symptomatic intracranial atherosclerotic arterial stenosis&#44; due to equivalent stroke prevention rates as for warfarin&#44; but decreased hemorrhagic complications&#46;<a class="elsevierStyleCrossRef" href="#bib30"><span class="elsevierStyleSup">30</span></a> A recent review of vertebrobasilar disease supported the use of antiplatelet agents in patients with arterial stenosis but warfarin in patients with severe&#44; flow-limiting lesions or dissections&#46;<a class="elsevierStyleCrossRef" href="#bib31"><span class="elsevierStyleSup">31</span></a> The selection of which therapeutic agent should be used and whether the choice of antithrombotic should be determined by the patient&#39;s injury grade must continue to be evaluated in prospective studies&#46;</p><p id="para150" class="elsevierStylePara elsevierViewall">Most importantly&#44; patients who are diagnosed early and treated with antithrombotics almost universally avoid INE&#46;<a class="elsevierStyleCrossRefs" href="#bib2"><span class="elsevierStyleSup">2&#44;4</span></a></p><p id="para160" class="elsevierStylePara elsevierViewall">The Memphis group showed a reduction in stroke rate for CAI from 64&#37; in untreated patients to 6&#46;8&#37; in treated patients &#40;either with anticoagulant or antiplatelet agents&#41;&#44; and for VAI a reduction in stroke rate from 54&#37; to 2&#46;6&#37; in untreated versus treated patients&#46; Our group&#39;s most recent evaluation demonstrated a stroke rate of 0&#46;5&#37; in 187 patients with BCVI treated with antithrombotics&#44; while untreated patients had an overall stroke rate of 21&#37;&#46;<a class="elsevierStyleCrossRef" href="#bib10"><span class="elsevierStyleSup">10</span></a> Although the optimal regimen remains undetermined&#44; there appears to be equivalence between the two therapies&#46;<a class="elsevierStyleCrossRefs" href="#bib2"><span class="elsevierStyleSup">2&#8211;4</span></a> To determine the ideal therapeutic regimen for BCVI&#44; we are currently enrolling patients in a prospective randomized study comparing antiplatelet agents to intravenous heparin in patients with grades I to III injuries&#46; With an attendant permanent neurologic morbidity of up to 80&#37; and mortality rates of up to 40&#37;&#44;<a class="elsevierStyleCrossRefs" href="#bib20"><span class="elsevierStyleSup">20&#44;32&#44;33</span></a> prompt treatment of diagnosed injuries is critical&#46;</p></span><span id="cesec50" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle80">Treatment&#58; Endovascular Stents</span><p id="para170" class="elsevierStylePara elsevierViewall">Over the past decade&#44; there has been an explosion in the use of percutaneous transluminal arterial interventions for both traumatic injuries and atherosclerotic lesions&#46; Although the role of carotid stents for atherosclerotic disease is being explored with randomized&#44; well-controlled trials&#44;<a class="elsevierStyleCrossRefs" href="#bib34"><span class="elsevierStyleSup">34&#8211;37</span></a> the indication for percutaneous intervention for traumatic injuries is less well defined&#46; Carotid stents have been utilized in patients with blunt injury with persistent pseudoaneurysms because of concern about subsequent embolization or rupture&#46;<a class="elsevierStyleCrossRefs" href="#bib38"><span class="elsevierStyleSup">38&#44;39</span></a> In theory&#44; the uncovered carotid stent acts as a filter to trap any thrombus within the pseudoaneurysm&#44; thereby preventing subsequent embolization and stroke&#46; The stent may also decrease flow into the pseudoaneurysm by increasing laminar flow within the stented portion of the carotid lumen itself&#46;<a class="elsevierStyleCrossRef" href="#bib40"><span class="elsevierStyleSup">40</span></a> Decreasing flow into the aneurysmal sac may then reduce any egress of blood from the sac&#44; which in turn may reduce turbulence within the lumen&#46;</p><p id="para180" class="elsevierStylePara elsevierViewall">Several isolated case reports have advocated the use of percutaneous angioplasty and stenting of carotid injures&#46;<a class="elsevierStyleCrossRefs" href="#bib41"><span class="elsevierStyleSup">41&#8211;47</span></a> Not surprisingly&#44; these case reports represent a diverse range of pathologies&#44; symptoms&#44; mechanisms of injury&#44; and time to diagnosis&#46; Although the majority appears to have patency of the stented carotid artery documented in follow-up radiographic evaluations&#44; several cases of carotid artery occlusion following stent placement have been reported&#46;<a class="elsevierStyleCrossRefs" href="#bib42"><span class="elsevierStyleSup">42&#44;44</span></a> Our most recent evaluation indicates a prohibitive stroke and carotid occlusion rate associated with carotid stents placed in acutely injured vessels<a class="elsevierStyleCrossRef" href="#bib11"><span class="elsevierStyleSup">11</span></a>&#59; additionally&#44; long-term follow-up in patients with traumatic pseudoaneurysms who were treated with anticoagulant therapy alone has not been evaluated&#46; Further understanding and evaluation of the role of appropriate concurrent antithrombotic therapy&#44; as well as evolving stent technology including smaller delivery systems and covered stents&#44; may improve the outcome for postinjury intraluminal carotid stents&#46; In the interim&#44; however&#44; our experience to date suggests that carotid stenting should be performed in selective cases&#44; and antithrombotic therapy should remain the cornerstone of treatment for posttraumatic pseudoaneurysms&#46;</p></span><span id="cesec60" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle90">Long-Term Treatment and Outcomes</span><p id="para190" class="elsevierStylePara elsevierViewall">Following initiation of antithrombotics&#44; treatment is empirically continued for 6 months&#46; Our current protocol is to transition the patient to warfarin if the initial antithrombotic therapy was heparin&#44; with a goal INR &#40;international normalized ratio&#41; of 2&#46;0&#46; If the patient was started on antiplatelet agents&#44; these are continued after hospital discharge&#46; Although complete healing of grade I injuries on repeat angiography at 7-10 days has been documented in more than half of affected patients&#44; the vast majority of grade II&#44; III&#44; and IV injuries persist&#46; Comprehensive long-term follow-up beyond the acute hospitalization has not been reported in the literature&#44; as is true in most trauma population studies&#46; Therefore&#44; whether these injuries heal or persist at 3 to 6 months is unknown&#46; There are anecdotal reports of carotid pseudoaneurysm rupture&#44; particularly in the petrous portion of the canal leading to epistaxis&#46;<a class="elsevierStyleCrossRefs" href="#bib48"><span class="elsevierStyleSup">48&#8211;53</span></a> However&#44; aside from these limited cases located intracranially&#44; few other reports are evident in the literature&#46;<a class="elsevierStyleCrossRefs" href="#bib54"><span class="elsevierStyleSup">54&#44;55</span></a> With so little long-term data&#44; it is difficult to ascertain either the true healing rate of these injuries or the risk of rupture or embolic stroke&#46;</p><p id="para200" class="elsevierStylePara elsevierViewall">The morbidity and mortality of BCVI-related INEs is well documented&#46; Stroke-related need for discharge and overall rate of discharge to rehabilitation services is higher in patients suffering BCVI-related INE&#46;<a class="elsevierStyleCrossRef" href="#bib10"><span class="elsevierStyleSup">10</span></a> Such prolonged acute patient care increases costs to patients&#44; to insurance companies&#44; and ultimately to society&#46; Although delineating the precise BCVI-related costs within a patient&#39;s acute or rehab stay is difficult in multisystem trauma patients&#44; calculating the cost of a patient&#39;s life is even more problematic&#46; is even more problematic&#46; Mortality due to BCVI is significant&#44; with CAI patients having a 13&#37; to 21&#37; stroke-related mortality and patients with VAI-related strokes having a 4&#37; to 18&#37; mortality rate in modern series&#46;<a class="elsevierStyleCrossRefs" href="#bib1"><span class="elsevierStyleSup">1&#44;11</span></a> The impact on mortality due to BCVI-related strokes appears independent of the patient&#39;s associated injuries&#46; Overall mortality in patients sustaining CAI was 7&#37; for those without a neurologic event versus 32&#37; for those with a neurologic event&#59; in patients with VAI&#44; those without neurologic event had a mortality of 7&#37; while those with a neurologic event had a mortality rate of 18&#37;&#59; the ISS &#40;illness severity scale&#41; was not significantly different between those with and without INE&#46;<a class="elsevierStyleCrossRef" href="#bib10"><span class="elsevierStyleSup">10</span></a></p><p id="para210" class="elsevierStylePara elsevierViewall">Repeat evaluation of the patient&#39;s injury and a determination of antithrombotic therapy should be considered at 6 months&#46; Although no long-term studies have been performed to date&#44; we currently recommend CTA for patients with initially diagnosed grade III and IV injuries&#44; and angiography for grade I and II injuries&#46; If the patient does not wish to undergo angiography with its attendant risks&#44; we empirically consider placing the patient on life-long aspirin&#46; Similarly&#44; patients with persistent grade III and IV injuries on repeat imaging are empirically continued on life-long aspirin&#46;</p></span><span id="cesec70" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle100">CONCLUSIONS</span><p id="para220" class="elsevierStylePara elsevierViewall">Diagnosis and treatment of blunt cerebrovascular injuries has evolved over the past 3 decades&#46; Currently&#44; protocols exist for establishing an indication for angiographic screening based on the injury mechanism and associated injuries&#44;<a class="elsevierStyleCrossRef" href="#bib7"><span class="elsevierStyleSup">7</span></a> hence limiting invasive procedures to those with the highest risk of injury &#40;<a class="elsevierStyleCrossRef" href="#fig2">Figure 2</a>&#41;&#46; Following identification of injuries in asymptomatic patients&#44; prompt initiation of antithrombotic therapy reduces the incidence of ischemic neurologic events&#46; Surgeons caring for the multiply injured should screen for carotid and vertebral artery injuries in high-risk patients&#46;</p><elsevierMultimedia ident="fig2"></elsevierMultimedia></span></span>"
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        "resumen" => "<span id="ceabs10" class="elsevierStyleSection elsevierViewall"><p id="spara60" class="elsevierStyleSimplePara elsevierViewall">Over the past decade&#44; the recognition and subsequent management of blunt cerebrovascular injuries has undergone a marked evolution&#46; Originally thought to be a rare occurrence&#44; blunt cerebrovascular injuries are now diagnosed in approximately 1&#37; of blunt trauma patients&#46; The recognition of a clinically silent period allows for angiographic screening for injuries based upon the mechanism of trauma and the patient&#39;s constellation of injuries&#46; Comprehensive screening of patients has resulted in the early diagnosis of blunt cerebrovascular injuries during the asymptomatic phase&#44; thus allowing treatment that could prevent neurologic sequelae&#46; Although the ideal regimen of antithrombotic therapy is yet to be determined&#44; treatment with either antiplatelet or anticoagulant agents has been shown to reduce the blunt cerebrovascular injuries related stroke rate&#46; Blunt cerebrovascular injury is a rare but potentially devastating injury&#59; appropriate angiographic screening in high-risk patients should be performed and prompt treatment initiated to prevent ischemic neurologic events&#46;</p></span>"
      ]
      "pt" => array:2 [
        "resumen" => "<span id="ceabs20" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle10">RESUMO</span><p id="spara80" class="elsevierStyleSimplePara elsevierViewall">Durante a d&#233;cada passada&#44; o reconhecimento e tratamento do traumatismo cerebrovascular contuso&#44; sofreu importante evolu&#231;&#227;o&#46; Este tipo de ferimento era considerado como ocorr&#234;ncia rara&#44; mas atualmente o quadro &#233; diagnosticado em cerca de 1&#37; dos pacientes&#46; O reconhecimento da exist&#234;ncia de um per&#237;odo cl&#237;nico silencioso permite uma sele&#231;&#227;o angiogr&#225;fica baseada no mecanismo de trauma e na sistematiza&#231;&#227;o dos ferimentos dos pacientes&#46; A avalia&#231;&#227;o sistem&#225;tica e a suspeita diagn&#243;stica precoce destes pacientes tem resultado em r&#225;pido confirma&#231;&#227;o durante a fase assintom&#225;tica&#44; permitindo a instaura&#231;&#227;o de tratamento cuja meta &#233; impedir o desenvolvimento de seq&#252;elas neurol&#243;gicas&#46; Embora o tratamento ideal&#44; antitromb&#243;tico&#44; ainda precise ser determinado&#44; o uso de agentes antiplaquet&#225;rios ou anticoagulantes reduz a incid&#234;ncia de les&#245;es cerebrovasculares relacionada a fen&#244;menos tromboembol&#237;ticos&#46;</p><p id="spara90" class="elsevierStyleSimplePara elsevierViewall">O traumatismo cerebrovascular contuso &#233; raro&#44; por&#233;m devastador&#46; A sele&#231;&#227;o angiogr&#225;fica apropriada em pacientes de alto risco deve ser realizada e o tratamento deve ser imediatamente iniciado para impedir eventos neurol&#243;gicos isqu&#234;micos&#46;</p></span>"
        "secciones" => array:1 [
          0 => array:2 [
            "identificador" => "ceabs20"
            "titulo" => "RESUMO"
          ]
        ]
      ]
    ]
    "multimedia" => array:5 [
      0 => array:7 [
        "identificador" => "fig1"
        "etiqueta" => "Figure 1"
        "tipo" => "MULTIMEDIAFIGURA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "figura" => array:1 [
          0 => array:4 [
            "imagen" => "gr1.jpeg"
            "Alto" => 1055
            "Ancho" => 1491
            "Tamanyo" => 160144
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spara10" class="elsevierStyleSimplePara elsevierViewall">Representative angiographic images of different grades of BCVI</p> <p id="spara20" class="elsevierStyleSimplePara elsevierViewall">Injury Grade&#58; Angiographic Finding&#59; Grade I&#58; Intimal Irregularity&#44; &#60;25&#37; Luminal Stenosis&#59; Grade II&#58; Intimal Irregularity&#44; &#62;25&#37; Luminal Stenosis&#44; Intimal Flap&#59; Grade III&#58; Pseudoaneurysm&#59; Grade IV&#58; Occlusion&#59; Grade V&#58; Transection with active extravasation&#46;</p>"
        ]
      ]
      1 => array:7 [
        "identificador" => "fig2"
        "etiqueta" => "Figure 2"
        "tipo" => "MULTIMEDIAFIGURA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "figura" => array:1 [
          0 => array:4 [
            "imagen" => "gr2.jpeg"
            "Alto" => 1137
            "Ancho" => 993
            "Tamanyo" => 109460
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spara30" class="elsevierStyleSimplePara elsevierViewall">Denver screening and treatment algorithm for BCVI</p>"
        ]
      ]
      2 => array:7 [
        "identificador" => "tbl1"
        "etiqueta" => "Table 1"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "tabla" => array:1 [
          "tablatextoimagen" => array:1 [
            0 => array:1 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><tbody title="tbody"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleBold">Signs&#47;Symptoms of BCVI</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Arterial hemorrhage&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Cervical bruit in patient &#60; 50 years of age&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Expanding cervical hematoma&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Focal neurologic deficit&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Neurologic exam incongruous with head CT scan findings&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Stroke on secondary CT scan&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleBold">Risk Factors for BCVI</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">High-energy transfer mechanism with&#58;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">LeForte II or III fracture&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Cervical-spine fracture patterns&#58; subluxation&#44; fractures extending into the transverse foramen&#44; fractures of C1-C3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Basilar skull fracture with carotid canal involvement&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Diffuse axonal injury with a Glascow Coma Scale &#40;GCS&#41; score &#60; 6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Near hanging with anoxic brain injury&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
            ]
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spara40" class="elsevierStyleSimplePara elsevierViewall">Denver screening criteria for blunt cerebrovascular injury &#40;BCVI&#41;</p>"
        ]
      ]
      3 => array:7 [
        "identificador" => "tbl3"
        "etiqueta" => "Table 3"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "tabla" => array:1 [
          "tablatextoimagen" => array:1 [
            0 => array:1 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col">Grade of injury&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col">Stroke rate&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Carotid artery injuries&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">I&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">3&#37;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">II&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">14&#37;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">III&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">26&#37;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">IV&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">50&#37;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">V&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">100&#37;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Vertebral artery injuries&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">I&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">6&#37;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">II&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">38&#37;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">III&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">27&#37;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">IV&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">28&#37;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">V&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">100&#37;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
            ]
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spara50" class="elsevierStyleSimplePara elsevierViewall">Stroke rate by blunt cerebrovascular injury grade</p>"
        ]
      ]
      4 => array:7 [
        "identificador" => "tbl2"
        "etiqueta" => "Table 2"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => false
        "mostrarDisplay" => true
        "tabla" => array:1 [
          "tablatextoimagen" => array:1 [
            0 => array:1 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><tbody title="tbody"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Grade I&#58;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">irregularity of the vessel wall or a dissection&#47;intramural hematoma with less than 25&#37; luminal stenosis&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Grade II&#58;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">intraluminal thrombus or raised intimal flap is visualized&#44; or dissection&#47;intramural hematoma with 25&#37; or more luminal narrowing&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Grade III&#58;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">pseudoaneurysm&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Grade IV&#58;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">vessel occlusion&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Grade V&#58;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">vessel transection&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
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      "titulo" => "REFERENCES"
      "seccion" => array:1 [
        0 => array:2 [
          "identificador" => "cebibsec10"
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            0 => array:3 [
              "identificador" => "bib1"
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                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Blunt cerebrovascular injuries&#58; diagnosis and treatment"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:6 [
                            0 => """
                              PR Miller \n
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                              """
                            1 => """
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                              """
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                            4 => """
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                              """
                            5 => """
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                        ]
                      ]
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                  ]
                  "host" => array:1 [
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                      "doi" => "10.1097/00005373-200108000-00009"
                      "Revista" => array:6 [
                        "tituloSerie" => "J Trauma"
                        "fecha" => "2001"
                        "volumen" => "51"
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                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/11493785"
                            "web" => "Medline"
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            1 => array:3 [
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              "etiqueta" => "2"
              "referencia" => array:1 [
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                  "contribucion" => array:1 [
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                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:6 [
                            0 => """
                              PR Miller \n
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                              """
                            1 => """
                              TC Fabian \n
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                      "Revista" => array:6 [
                        "tituloSerie" => "Ann Surg"
                        "fecha" => "2002"
                        "volumen" => "236"
                        "paginaInicial" => "386"
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                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/12192325"
                            "web" => "Medline"
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            2 => array:3 [
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                  "contribucion" => array:1 [
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                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
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                            0 => """
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                      "Revista" => array:6 [
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                            1 => """
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                              """
                            3 => """
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                      "autores" => array:1 [
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                          "etal" => true
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                            0 => """
                              TH Cogbill \n
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            10 => array:3 [
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                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:3 [
                            0 => """
                              CC Cothren \n
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                              """
                            1 => """
                              EE Moore \n
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                            2 => """
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                          ]
                        ]
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                  "host" => array:1 [
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                      "Revista" => array:6 [
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                      "autores" => array:1 [
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                      "Revista" => array:6 [
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Article information

ISSN: 18075932
Original language: English

DOI:10.1590/S1807-59322005000600011

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