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"apellidos" => "Pais-Brito" "referencia" => array:2 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">a</span>" "identificador" => "aff0005" ] 1 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">b</span>" "identificador" => "aff0010" ] ] ] ] "afiliaciones" => array:4 [ 0 => array:3 [ "entidad" => "Servicio de Cirugía Ortopédica y Traumatología, Hospital Universitario de Canarias, La Laguna, Tenerife, Spain" "etiqueta" => "a" "identificador" => "aff0005" ] 1 => array:3 [ "entidad" => "Facultad de Medicina, Universidad de La Laguna, La Laguna, Tenerife, Spain" "etiqueta" => "b" "identificador" => "aff0010" ] 2 => array:3 [ "entidad" => "Unidad de Monitorización Neurofisiológica Intraoperatoria, Servicio de Neurofisiología Clínica, Hospital Universitario de Canarias, La Laguna, Tenerife, Spain" "etiqueta" => "c" "identificador" => "aff0015" ] 3 => array:3 [ "entidad" => "Servicio de Radiodiagnóstico, Hospital Universitario de Canarias, La Laguna, Tenerife, Spain" "etiqueta" => "d" "identificador" => "aff0020" ] ] "correspondencia" => array:1 [ 0 => array:3 [ "identificador" => "cor0005" "etiqueta" => "⁎" "correspondencia" => "Corresponding author." ] ] ] ] "titulosAlternativos" => array:1 [ "es" => array:1 [ "titulo" => "Monitorización neurofisiológica intraoperatoria en la cirugía del nervio periférico: descripción técnica y resultados en nuestro centro" ] ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:7 [ "identificador" => "fig0015" "etiqueta" => "Figure 3" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr3.jpeg" "Alto" => 401 "Ancho" => 600 "Tamanyo" => 49963 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0065" class="elsevierStyleSimplePara elsevierViewall">Identification of the posterior tibial nerve and common fibular nerve (vessel-loop) and a well-defined schwannoma in the sensory superficial branches stemming from the posterior tibial nerve.</p>" ] ] ] "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Introduction</span><p id="par0005" class="elsevierStylePara elsevierViewall">Microsurgery of the peripheral nerve in the area of Traumatology and Orthopedics is mainly carried out in the treatment of acute neurological lesions or complications thereof (neuromas), as well as peripheral nerve tumors.<a class="elsevierStyleCrossRef" href="#bib0185"><span class="elsevierStyleSup">1</span></a> Traumatic lesions of the peripheral nerve are usually secondary to fractures (open or closed) or to penetrating injuries in the limbs.<a class="elsevierStyleCrossRef" href="#bib0185"><span class="elsevierStyleSup">1</span></a> Their diagnosis is mainly clinical, can affect all age groups, and is potentially devastating for patients, as they affect professional and daily life activities. Peripheral nerve tumors are rare lesions developed at the expense of the elements comprising the nerve, with Schwann cells being the main constituent element.<a class="elsevierStyleCrossRefs" href="#bib0190"><span class="elsevierStyleSup">2,3</span></a> They usually appear as a soft tissue mass in the path of the nerve, which may be painful upon palpation and present positive Tinel sign.<a class="elsevierStyleCrossRefs" href="#bib0190"><span class="elsevierStyleSup">2,4</span></a> So-called schwannoma or neurilemoma is the most frequent neurogenic tumor in peripheral nerves, accounting for approximately 5% of benign soft tissue neoplasms.<a class="elsevierStyleCrossRefs" href="#bib0205"><span class="elsevierStyleSup">5–12</span></a></p><p id="par0010" class="elsevierStylePara elsevierViewall">Both traumatic lesions, particularly secondary ones once the neuroma is constituted, and tumoral lesions, particularly intraneural ones, require advanced anatomical knowledge and extensive experience in microsurgery in order to achieve the desired objectives, which include recovery of the maximum functional capacity possible and elimination of pain.<a class="elsevierStyleCrossRef" href="#bib0185"><span class="elsevierStyleSup">1</span></a> Direct nerve repair or through a graft in the first case or exeresis of the lesion respecting the nerve of origin in the second case are the treatments of choice.<a class="elsevierStyleCrossRefs" href="#bib0245"><span class="elsevierStyleSup">13,14</span></a></p><p id="par0015" class="elsevierStylePara elsevierViewall">Therefore, we can say that an essential goal of this procedure is the preservation of a maximum of the undamaged nerve fascicles, that is, not sacrificing healthy nerves, and it is in this aspect that intraoperative neurophysiological monitoring (INM) studies are of great value, as they provide the surgical team with basic, reliable and real-time information on the functionality of the explored nerve.<a class="elsevierStyleCrossRefs" href="#bib0200"><span class="elsevierStyleSup">4,5</span></a></p><p id="par0020" class="elsevierStylePara elsevierViewall">The main uses of INM of the peripheral nerves and brachial plexus are<a class="elsevierStyleCrossRefs" href="#bib0250"><span class="elsevierStyleSup">14,15</span></a>:<ul class="elsevierStyleList" id="lis0005"><li class="elsevierStyleListItem" id="lsti0005"><span class="elsevierStyleLabel">1.</span><p id="par0025" class="elsevierStylePara elsevierViewall">Identifying the peripheral nerves.</p></li><li class="elsevierStyleListItem" id="lsti0010"><span class="elsevierStyleLabel">2.</span><p id="par0030" class="elsevierStylePara elsevierViewall">Locating preexisting lesions throughout the pathway of the nerve.</p></li><li class="elsevierStyleListItem" id="lsti0015"><span class="elsevierStyleLabel">3.</span><p id="par0035" class="elsevierStylePara elsevierViewall">Determining continuity across a nerve lesion.</p></li><li class="elsevierStyleListItem" id="lsti0020"><span class="elsevierStyleLabel">4.</span><p id="par0040" class="elsevierStylePara elsevierViewall">Determining whether there is root avulsion.</p></li><li class="elsevierStyleListItem" id="lsti0025"><span class="elsevierStyleLabel">5.</span><p id="par0045" class="elsevierStylePara elsevierViewall">Identifying the targets for nerve biopsy.</p></li><li class="elsevierStyleListItem" id="lsti0030"><span class="elsevierStyleLabel">6.</span><p id="par0050" class="elsevierStylePara elsevierViewall">Monitoring and preventing damage to healthy nerves during the intervention.</p></li><li class="elsevierStyleListItem" id="lsti0035"><span class="elsevierStyleLabel">7.</span><p id="par0055" class="elsevierStylePara elsevierViewall">Obtaining an evolutionary prognosis of the neurological lesion.</p></li></ul></p><p id="par0060" class="elsevierStylePara elsevierViewall">The main objective of this study was to describe the technique of intraoperative neurophysiological monitoring conducted at our center and, secondarily, to report the experience of the surgical team in a series of 30 cases, as well as to debate whether these reasons make it a useful technique in peripheral nerve surgery.</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Materials and methods</span><p id="par0065" class="elsevierStylePara elsevierViewall">This was a retrospective, descriptive study conducted in January 2014 on 30 patients intervened during the period between January 2009 and September 2013 due to peripheral nerve pathology (<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>), at the same center (Hospital Universitario de Canarias, third level of healthcare).</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><p id="par0070" class="elsevierStylePara elsevierViewall">A clinical history was obtained from all patients, and all underwent physical exploration, especially focusing on motor and sensory function, before and after the surgery, conducted by the same head surgeon (FMM), given his knowledge and experience in microsurgery. We followed the criteria described by the British Medical Research Council (BMC) or modified versions classifying sensory recovery between S0 and S5 and motor recovery between M0 and M5.<a class="elsevierStyleCrossRef" href="#bib0185"><span class="elsevierStyleSup">1</span></a></p><p id="par0075" class="elsevierStylePara elsevierViewall">All patients underwent a prior neurophysiological study by the same neurophysiologist in charge of the intraoperative technique (PPL). The Seddon classification, considered to be the most widely used worldwide, was applied as it provides an understanding of the physiopathology of the lesion, establishes a likely prognosis and, above all, offers an adequate therapeutic approach.<a class="elsevierStyleCrossRef" href="#bib0185"><span class="elsevierStyleSup">1</span></a> This classification distinguishes between: <span class="elsevierStyleItalic">neuropraxia</span>, a block in nerve conduction at a local level, without axonal involvement and therefore without distal wallerian degeneration, in which function is recovered rapidly, after a couple weeks at the most, and <span class="elsevierStyleItalic">restitutio ad integrum</span> is the norm; <span class="elsevierStyleItalic">axonotmesis</span>, an axonal lesion associated to distal wallerian degeneration in which the endoneurium and perineurium are intact, thus guaranteeing correct guidance of the axon in regeneration up to the distal end of the lesion site, with fiber displacement speed classically described as between 1 and 1.5<span class="elsevierStyleHsp" style=""></span>mm daily, and where functional recovery is also the norm, although with a greater delay than neuropraxia, with up to 6 months; and lastly, <span class="elsevierStyleItalic">neurotmesis</span>, a more severe lesion, with complete section of the nerve, absolute loss of function and absence of any kind of spontaneous recovery.<a class="elsevierStyleCrossRefs" href="#bib0185"><span class="elsevierStyleSup">1,14</span></a></p><p id="par0080" class="elsevierStylePara elsevierViewall">All patients with tumoral pathology also underwent a magnetic resonance imaging (MRI) study prior to the surgery, which was interpreted by the same radiologist (LDF).</p><p id="par0085" class="elsevierStylePara elsevierViewall">Data collection, analysis and interpretation were carried out by the remaining authors of this work (MHP, JPB).</p><p id="par0090" class="elsevierStylePara elsevierViewall">Al the patients were adequately informed about the necessary procedures. There was no need to obtain approval from the Ethics Committee of our center, as this diagnostic test was accepted for use in daily practice. Moreover, this study did not provide any personal information from patients, thus maintaining their confidentiality.</p><p id="par0095" class="elsevierStylePara elsevierViewall">The <span class="elsevierStyleItalic">inclusion criteria</span> to participate in the study were the following:<ul class="elsevierStyleList" id="lis0010"><li class="elsevierStyleListItem" id="lsti0040"><span class="elsevierStyleLabel">-</span><p id="par0100" class="elsevierStylePara elsevierViewall">Open traumatic neurological lesions without clinical or neurological recovery after 6 months of evolution since the first intervention.</p></li><li class="elsevierStyleListItem" id="lsti0045"><span class="elsevierStyleLabel">-</span><p id="par0105" class="elsevierStylePara elsevierViewall">Closed neurological lesions treated conservatively with worsening of the symptoms and neurophysiology during follow-up.</p></li><li class="elsevierStyleListItem" id="lsti0050"><span class="elsevierStyleLabel">-</span><p id="par0110" class="elsevierStylePara elsevierViewall">Neural or extraneural tumoral lesions of the peripheral nerve.</p></li><li class="elsevierStyleListItem" id="lsti0055"><span class="elsevierStyleLabel">-</span><p id="par0115" class="elsevierStylePara elsevierViewall">Existence of a neurophysiological study prior to the surgery.</p></li></ul></p><p id="par0120" class="elsevierStylePara elsevierViewall">The <span class="elsevierStyleItalic">exclusion criteria</span> were the following:<ul class="elsevierStyleList" id="lis0015"><li class="elsevierStyleListItem" id="lsti0060"><span class="elsevierStyleLabel">-</span><p id="par0125" class="elsevierStylePara elsevierViewall">Diabetic patients.</p></li><li class="elsevierStyleListItem" id="lsti0065"><span class="elsevierStyleLabel">-</span><p id="par0130" class="elsevierStylePara elsevierViewall">Patients with prior sensory-motor alterations.</p></li><li class="elsevierStyleListItem" id="lsti0070"><span class="elsevierStyleLabel">-</span><p id="par0135" class="elsevierStylePara elsevierViewall">Patients who did not sign the informed consent forms.</p></li><li class="elsevierStyleListItem" id="lsti0075"><span class="elsevierStyleLabel">-</span><p id="par0140" class="elsevierStylePara elsevierViewall">Patients who did not complete the required follow-up.</p></li></ul></p><p id="par0145" class="elsevierStylePara elsevierViewall">Before describing our exploration technique, we should highlight a series of <span class="elsevierStyleItalic">preliminary aspects</span> to be taken into account:<ul class="elsevierStyleList" id="lis0020"><li class="elsevierStyleListItem" id="lsti0080"><span class="elsevierStyleLabel">•</span><p id="par0150" class="elsevierStylePara elsevierViewall">A decrease in <span class="elsevierStyleItalic">temperature</span> during the surgical process is difficult to prevent and, therefore, we should bear in mind that this temperature decrease will reduce nerve conduction speeds.</p></li><li class="elsevierStyleListItem" id="lsti0085"><span class="elsevierStyleLabel">•</span><p id="par0155" class="elsevierStylePara elsevierViewall">A decrease in <span class="elsevierStyleItalic">arterial tension</span> during surgery reduces the amplitudes of somatosensory evoked potentials (SSEP) and motor evoked potentials (MEP).</p></li><li class="elsevierStyleListItem" id="lsti0090"><span class="elsevierStyleLabel">•</span><p id="par0160" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Peripheral ischemia</span>, caused by the ischemia cuff, affects nerve response by altering the <span class="elsevierStyleItalic">vasa nervorum</span>, and may block nerve response.<a class="elsevierStyleCrossRefs" href="#bib0250"><span class="elsevierStyleSup">14,16,17</span></a> If a tourniquet is applied for over 60<span class="elsevierStyleHsp" style=""></span>min, it should be removed at least 20–30<span class="elsevierStyleHsp" style=""></span>min before starting intraoperative monitoring studies.<a class="elsevierStyleCrossRef" href="#bib0245"><span class="elsevierStyleSup">13</span></a></p></li><li class="elsevierStyleListItem" id="lsti0095"><span class="elsevierStyleLabel">•</span><p id="par0165" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Anesthesia</span> affects INM studies as it alters cortical excitability. In addition, we should also take into consideration the effect of neuromuscular relaxing agents.</p></li></ul></p><p id="par0170" class="elsevierStylePara elsevierViewall">In our series we did not use peripheral ischemia in any case, the anesthesia used was general with particular precaution regarding the use of neuromuscular relaxing agents which altered intraoperative measurements, and the temperature within operating rooms was maintained at 15<span class="elsevierStyleHsp" style=""></span>°C in all cases.</p><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Methodology: technical description of neurophysiological monitoring</span><p id="par0175" class="elsevierStylePara elsevierViewall">The technique starts once the nerve to be explored has been identified and isolated. Since the main purpose of nerve conduction studies is to assess the integrity of the nerve, its functional continuity or to determine the location of a peripheral nerve lesion, the stimulation and reception electrodes should be placed on either side of the lesion. This is known as <span class="elsevierStyleItalic">bipolar stimulation</span>, and its main advantage is causing less current dispersion. The best alternative when bipolar stimulation is unfeasible, is to conduct monopolar stimulation with the cathode on the nerve and the anode on an inert surface at a certain distance. The <span class="elsevierStyleItalic">bipolar stimulation</span> electrode (preferable hooked electrodes) held by the surgeon is placed on the surface of the nerve, with the active electrode aimed toward the collecting electrodes.<a class="elsevierStyleCrossRef" href="#bib0255"><span class="elsevierStyleSup">15</span></a> The distance between the poles of this bipolar electrode is generally of 3–4<span class="elsevierStyleHsp" style=""></span>mm, although this mainly depends on the size of the nerve, as large nerves may require distances between poles close to 7<span class="elsevierStyleHsp" style=""></span>mm.<a class="elsevierStyleCrossRef" href="#bib0245"><span class="elsevierStyleSup">13</span></a></p><p id="par0180" class="elsevierStylePara elsevierViewall">First, the neural response is evoked in a healthy part of the nerve, placing both the stimulation and reception electrodes proximally or distally to the lesion. Subsequently, the stimulation electrodes are placed proximally and the reception electrodes are placed distally to the lesion to evoke a NAP across it.</p><p id="par0185" class="elsevierStylePara elsevierViewall">During the stimulation it is advisable to <span class="elsevierStyleItalic">elevate the nerve</span> with respect to the surgical field, in order to avoid contact with any fluids (blood, serum…) which would reduce the intensity of the stimulus received by the nerve. We must take into account that an excessive stimulation increases the intensity of the stimulus, which may become a considerable problem if the distances between the stimulation and collection electrodes are small.</p><p id="par0190" class="elsevierStylePara elsevierViewall">Generally the duration of the stimulus is around 0.05–0.1<span class="elsevierStyleHsp" style=""></span>ms with square pulse,<a class="elsevierStyleCrossRef" href="#bib0215"><span class="elsevierStyleSup">7</span></a> and the intensity does not need to be above 1–5<span class="elsevierStyleHsp" style=""></span>mA to produce a depolarization of the nerve and evoke a supramaximal response. Damaged nerves require stimulation at higher intensities in order to evoke a response (around 20–25<span class="elsevierStyleHsp" style=""></span>mA or 25–50<span class="elsevierStyleHsp" style=""></span>V).<a class="elsevierStyleCrossRef" href="#bib0260"><span class="elsevierStyleSup">16</span></a> This causes an increase in the stimulation artifact that could interfere with response collection.</p><p id="par0195" class="elsevierStylePara elsevierViewall">The <span class="elsevierStyleItalic">nerve action potential</span> (<span class="elsevierStyleItalic">NAP</span>) is an electrical potential that is generated and travels through nerve fibers once these have been stimulated above their threshold, physiologically or electrically.<a class="elsevierStyleCrossRef" href="#bib0260"><span class="elsevierStyleSup">16</span></a> It can be registered both in the entire nerve and in its various fascicles.<a class="elsevierStyleCrossRef" href="#bib0250"><span class="elsevierStyleSup">14</span></a> The presence of NAP is considered to require at least 4000 fibers of over 5<span class="elsevierStyleHsp" style=""></span>μ in diameter. When assessing the continuity of the nerve, we must take into account that the presence of a few large-sized myelinated nerve fibers (out of the 4000) can evoke a NAP of normal characteristics. The process of studying a peripheral nerve starts with stimulation and reception of the NAP in a proximal location to the damaged region of the nerve, which allows the technique to be assessed (normal responses should be evoked).<a class="elsevierStyleCrossRef" href="#bib0245"><span class="elsevierStyleSup">13</span></a> The electrodes are subsequently placed on both sides of the lesion to assess nerve continuity.</p><p id="par0200" class="elsevierStylePara elsevierViewall">The distance between the stimulation and collection electrodes should be over 4<span class="elsevierStyleHsp" style=""></span>cm.<a class="elsevierStyleCrossRefs" href="#bib0245"><span class="elsevierStyleSup">13,16</span></a> The <span class="elsevierStyleItalic">collection electrode</span> should also be bipolar, with a distance of 3–5<span class="elsevierStyleHsp" style=""></span>mm between the electrodes (with the active electrode placed closer to the cathode of the stimulator), with a greater separation between them if there is a considerable distance between the stimulator and the receptor.</p><p id="par0205" class="elsevierStylePara elsevierViewall">The <span class="elsevierStyleItalic">ground</span> electrode can be placed on a surface of the skin of the patient, away from the grounding of the electric scalpel.<a class="elsevierStyleCrossRef" href="#bib0245"><span class="elsevierStyleSup">13</span></a></p><p id="par0210" class="elsevierStylePara elsevierViewall">The <span class="elsevierStyleItalic">filters</span> required to obtain a NAP response are between 5 and 10<span class="elsevierStyleHsp" style=""></span>Hz for the low frequency and between 2 and 3<span class="elsevierStyleHsp" style=""></span>kHz for the high frequency.<a class="elsevierStyleCrossRef" href="#bib0260"><span class="elsevierStyleSup">16</span></a></p><p id="par0215" class="elsevierStylePara elsevierViewall">The <span class="elsevierStyleItalic">amplitude</span> of NAP is generally low, about 100<span class="elsevierStyleHsp" style=""></span>μV, so the gain is around 20–50<span class="elsevierStyleHsp" style=""></span>μV per division. Response averaging is necessary in order to evaluate it (less than 10 stimuli are generally necessary).</p><p id="par0220" class="elsevierStylePara elsevierViewall">Naturally, the <span class="elsevierStyleItalic">latency</span> of the response depends on the distance between the stimulation and collection electrodes. Accepting a conduction speed of 50<span class="elsevierStyleHsp" style=""></span>m/s, we can apply 1<span class="elsevierStyleHsp" style=""></span>ms for every 5<span class="elsevierStyleHsp" style=""></span>cm of nerve distance, so the sweep should be around 0.5–1<span class="elsevierStyleHsp" style=""></span>ms per division and increase to 2<span class="elsevierStyleHsp" style=""></span>ms if the distance between both electrodes is considerable.</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Practical implications for intraoperative decision making</span><p id="par0225" class="elsevierStylePara elsevierViewall">The large majority of peripheral nerve lesions do not section the nerves, instead leaving continuity lesions that may not be observed during a visual inspection.<a class="elsevierStyleCrossRef" href="#bib0265"><span class="elsevierStyleSup">17</span></a> The presence of structural continuity does not imply nerve functionality; therefore, a simple visual inspection by itself should not be taken into consideration in the surgical process, since electrophysiological studies will be the ones to determine the course of the intervention. Thus, the surgical decision in peripheral nerve lesions is based on the determination of continuity of nerve function through a lesion in the said nerve (ascertaining the presence of continuity).<a class="elsevierStyleCrossRefs" href="#bib0265"><span class="elsevierStyleSup">17,18</span></a></p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">How do we know if an explored nerve is functional and therefore viable?</span><p id="par0230" class="elsevierStylePara elsevierViewall">The presence of NAP through a lesion is the gold standard technique and indicates that there is nerve continuity or collateral reinnervation (even though preoperative neurophysiological studies and symptoms may indicate otherwise).<a class="elsevierStyleCrossRefs" href="#bib0245"><span class="elsevierStyleSup">13,17</span></a> Therefore, surgical procedures should be limited to neurolysis (release of nerve adherences) of the lesion in continuity<a class="elsevierStyleCrossRef" href="#bib0250"><span class="elsevierStyleSup">14</span></a> (<a class="elsevierStyleCrossRef" href="#fig0005">Fig. 1</a>), with this being the crucial point to bear in mind during the decision-making process in peripheral nerve surgery.<a class="elsevierStyleCrossRef" href="#bib0185"><span class="elsevierStyleSup">1</span></a></p><elsevierMultimedia ident="fig0005"></elsevierMultimedia></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">What to do in case of lack of response to nerve action potential?</span><p id="par0235" class="elsevierStylePara elsevierViewall">In case of a lack of response to NAP, we should carry out the following steps sequentially<a class="elsevierStyleCrossRefs" href="#bib0250"><span class="elsevierStyleSup">14,16</span></a>:<ul class="elsevierStyleList" id="lis0025"><li class="elsevierStyleListItem" id="lsti0100"><span class="elsevierStyleLabel">1.</span><p id="par0240" class="elsevierStylePara elsevierViewall">Verify the presence of hypotension and hypothermia.</p></li><li class="elsevierStyleListItem" id="lsti0105"><span class="elsevierStyleLabel">2.</span><p id="par0245" class="elsevierStylePara elsevierViewall">Proximal to the lesion or in healthy segments, check the position of the electrodes and ensure that they are not too close.</p></li><li class="elsevierStyleListItem" id="lsti0110"><span class="elsevierStyleLabel">3.</span><p id="par0250" class="elsevierStylePara elsevierViewall">Verify whether the stimulating electrode is producing a stimulus.</p></li><li class="elsevierStyleListItem" id="lsti0115"><span class="elsevierStyleLabel">4.</span><p id="par0255" class="elsevierStylePara elsevierViewall">Make sure that there should be no fluids in the surgical field and the electrodes should not touch other tissues.</p></li><li class="elsevierStyleListItem" id="lsti0120"><span class="elsevierStyleLabel">5.</span><p id="par0260" class="elsevierStylePara elsevierViewall">There should not be excessive tension in the nerve tissue.</p></li><li class="elsevierStyleListItem" id="lsti0125"><span class="elsevierStyleLabel">6.</span><p id="par0265" class="elsevierStylePara elsevierViewall">If the surgical field has cooled, it should be warmed with warm serum.</p></li><li class="elsevierStyleListItem" id="lsti0130"><span class="elsevierStyleLabel">7.</span><p id="par0270" class="elsevierStylePara elsevierViewall">If the tourniquet is still in place, it should be removed and a period of 20<span class="elsevierStyleHsp" style=""></span>min should be awaited before continuing with INM.</p></li><li class="elsevierStyleListItem" id="lsti0135"><span class="elsevierStyleLabel">8.</span><p id="par0275" class="elsevierStylePara elsevierViewall">No local anesthesia should be used.</p></li><li class="elsevierStyleListItem" id="lsti0140"><span class="elsevierStyleLabel">9.</span><p id="par0280" class="elsevierStylePara elsevierViewall">If a large artifact is observed, about 60<span class="elsevierStyleHsp" style=""></span>Hz (network), the network filter of the device should be switched off, before checking that there are no other machines, such as X-ray devices in the field.</p></li><li class="elsevierStyleListItem" id="lsti0145"><span class="elsevierStyleLabel">10.</span><p id="par0285" class="elsevierStylePara elsevierViewall">Ensure that the signal obtained does not come from the inadvertent stimulation of other nerves.</p></li></ul></p><p id="par0290" class="elsevierStylePara elsevierViewall">In general, it is accepted that lesions in which NAP is not transmitted after an evolution of 3–4 months do not have a chance of spontaneous recovery and should be intervened through a graft or nerve transfer.<a class="elsevierStyleCrossRefs" href="#bib0245"><span class="elsevierStyleSup">13,16</span></a> On the other hand, the presence of NAP points to functional recovery within weeks or months.</p><p id="par0295" class="elsevierStylePara elsevierViewall">Lastly, we must take into account the possibilities for <span class="elsevierStyleItalic">false positive potentials</span><a class="elsevierStyleCrossRefs" href="#bib0250"><span class="elsevierStyleSup">14,16,17</span></a>:<ul class="elsevierStyleList" id="lis0030"><li class="elsevierStyleListItem" id="lsti0150"><span class="elsevierStyleLabel">1.</span><p id="par0300" class="elsevierStylePara elsevierViewall">Prenodal lesions (plexopathies) may respect the sensory fibers alongside severe damage of the motor fibers and generally the conductions are very high (around 65–70<span class="elsevierStyleHsp" style=""></span>m/s of the sensory fibers instead of the 50<span class="elsevierStyleHsp" style=""></span>m/s of the motor or mixed).</p></li><li class="elsevierStyleListItem" id="lsti0155"><span class="elsevierStyleLabel">2.</span><p id="par0305" class="elsevierStylePara elsevierViewall">We may be stimulating and collecting information in a different area from that of the nerve lesion.</p></li><li class="elsevierStyleListItem" id="lsti0160"><span class="elsevierStyleLabel">3.</span><p id="par0310" class="elsevierStylePara elsevierViewall">We may be exploring a different nerve or part of the plexus.</p></li><li class="elsevierStyleListItem" id="lsti0165"><span class="elsevierStyleLabel">4.</span><p id="par0315" class="elsevierStylePara elsevierViewall">Exploring the nerve more than 1 year after the nerve lesion.</p></li><li class="elsevierStyleListItem" id="lsti0170"><span class="elsevierStyleLabel">5.</span><p id="par0320" class="elsevierStylePara elsevierViewall">An excessive averaging may register fine fibers.</p></li><li class="elsevierStyleListItem" id="lsti0175"><span class="elsevierStyleLabel">6.</span><p id="par0325" class="elsevierStylePara elsevierViewall">It is important to be careful with near motor responses.</p></li></ul></p><p id="par0330" class="elsevierStylePara elsevierViewall">In the case of <span class="elsevierStyleItalic">peripheral nerve tumors</span>,<a class="elsevierStyleCrossRef" href="#bib0250"><span class="elsevierStyleSup">14</span></a> the use of NAP can detect the peripheral nerve in those locations where the architecture or anatomy is confusing and even identify the functional fascicles (and protect as far as possible).<a class="elsevierStyleCrossRef" href="#bib0245"><span class="elsevierStyleSup">13</span></a></p></span></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0105">Results</span><p id="par0335" class="elsevierStylePara elsevierViewall">We registered 12 peripheral nerve schwannomas, 9 in the upper limbs and 3 in the lower limbs (<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>). In all cases, the surgery was carried out with no incidents and the tumor was resected from the main trunk of the nerve, except for 1 case where we had to sacrifice a only-sensory branch of the posterior tibial nerve after the neurophysiological monitoring showed that it had no motor component. In this case, a residual hypoesthesia was registered in the internal calf region (S2 according to the BMC classification), which lasted for 3 months (<a class="elsevierStyleCrossRefs" href="#fig0010">Figs. 2 and 3</a>). As a permanent sequela we report 1 case of schwannoma in the external popliteal nerve which began with sensory and motor involvement (M1 and S1) (<a class="elsevierStyleCrossRefs" href="#fig0020">Figs. 4 and 5</a>), with a persistent hypoesthesia in the dorsum of the foot (S1 according to the BMC classification), although without motor involvement. We registered 1 case of fibrolipoma of the median nerve, also known as neural fibrolipomatous hamartoma, perineural lipoma or neural fat infiltration, in a 57-year-old male which started as carpal tunnel syndrome and increased in size in the volar side of the wrist. We were able to treat it through section of the flexor retinaculum of the wrist and endoneurolysis of the median nerve. Therefore, we registered 11 cases with excellent results and 2 with good results, 1 with temporary hypoesthesia and another with almost full motor recovery, although not sensory.</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><elsevierMultimedia ident="fig0015"></elsevierMultimedia><elsevierMultimedia ident="fig0020"></elsevierMultimedia><elsevierMultimedia ident="fig0025"></elsevierMultimedia><p id="par0340" class="elsevierStylePara elsevierViewall">We monitored 17 cases of traumatic lesions (<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>). Ten of these cases were secondary to penetrating wounds, and in 6 of them we conducted direct neurorrhaphy of the damaged nerve. During the revision surgery we verified through INM that in 6 cases the neuroma did not allow distal conduction, so it was necessary to perform grafting with tissue from the sural nerve following the usual technique. In the 4 remaining cases we registered distal conduction so we only carried out neurolysis.</p><p id="par0345" class="elsevierStylePara elsevierViewall">As for the remaining cases, 7 patients had suffered accidental closed trauma or else iatrogenic damage (ulnar nerve damage in surgery for supracondylar fracture). In this last group, intraoperative neurophysiological monitoring was very useful in 3 children suffering ulnar nerve lesion following incruental reduction and percutaneous fixation of a displaced supracondylar fracture of the humerus, due to a possible lesion whilst introducing the needle from the ulnar side. After being unable to observe functional recovery in the physical exploration or the serial neurophysiological studies after 9, 10 and 11 months, respectively, we decided to perform exploration and direct monitoring (<a class="elsevierStyleCrossRef" href="#fig0005">Fig. 1</a>). In the 3 cases we were unable to observe evident macroscopic lesions and registered that the nerve did conduct at a distal level, so we simply performed neurolysis. Function was recovered 3, 4 and 4.5 months after the surgery, respectively.</p></span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0110">Discussion</span><p id="par0350" class="elsevierStylePara elsevierViewall">Peripheral nerve surgery is a very demanding type of surgery, requiring advanced technical and anatomical knowledge in order to obtain good functional results.<a class="elsevierStyleCrossRefs" href="#bib0185"><span class="elsevierStyleSup">1,14</span></a> The decision to repair a damaged nerve should take into account both the condition of the nerve and the capacity of the surgical team and the hospital.<a class="elsevierStyleCrossRef" href="#bib0270"><span class="elsevierStyleSup">18</span></a> One of the most important factors to obtain these results is the moment when the surgical reconstruction is carried out, that is, surgical timing. Given that, very often, the lost nerve function returns spontaneously, performing surgery too early would be therapeutically rash, as the patient would undergo an unnecessary surgical intervention. On the other hand, acting too late would reduce the chances of recovery, because muscles which do not receive innervation inevitably tend to become atrophied, so the longer the period elapsed between the lesion and its repair, the greater the atrophy and the smaller the chances of success. In general practice, the second scenario (patients referred belatedly) is much more common than the first. Two main groups can be established: closed and open lesions. The first are those that generally require an expectant initial approach and deferred surgery, not before 3 months since the trauma. On the other hand, open lesions should be explored rapidly in order to carry out direct neurorrhaphy whenever feasible, or else cleaning and repair of the ends of the sectioned nerve, in order to conduct a repair with an interposed graft. Other nerve exploration indications include: nerve lesions with arterial damage, lesions caused by traction on the brachial plexus, decrease of nerve functionality after an initially expectant approach, lack of neurological improvement following a closed lesion, lack of improvement following a conduction block within 6 weeks after the lesion, persistent pain and suspected formation of a neuroma.<a class="elsevierStyleCrossRefs" href="#bib0185"><span class="elsevierStyleSup">1,18</span></a></p><p id="par0355" class="elsevierStylePara elsevierViewall">Following a nerve lesion, a neurophysiological study helps to determine the severity of the nerve involvement, as well as detect signs of functional recovery before these are reflected by the symptoms. Currently, decision-making in peripheral nerve pathologies is still the result of a combination of neurophysiological studies and serial physical examinations. However, the use of INM has sparked a considerable and increasing interest, as it provides real-time information, by stimulating neural structures directly, about the functionality of the main affected nerve branches and the presence or absence of an action potential in the distal nerve to the lesion, particularly when the nerve is not completely sectioned and a neuroma has formed.<a class="elsevierStyleCrossRefs" href="#bib0245"><span class="elsevierStyleSup">13,14,16,17</span></a> This technique can even distinguish between an intact fascicle and a neuroma. Clinically, the size and hardness of the neuroma is a negative factor for recovery, but good amplitude signals distal to the nerve lesion indicate a better prognosis because they point to the existence of intact fascicles crossing the damaged area.<a class="elsevierStyleCrossRefs" href="#bib0255"><span class="elsevierStyleSup">15,18</span></a> We find this technique particularly interesting in cases of posttraumatic closed lesions or after surgery in specific locations, as in the case of the ulnar nerve at the level of the elbow in supracondylar humeral fractures in children, as in 3 cases in our series. With this technique we were able to determine whether the nerve was functional or required a nerve graft, as in one of the cases described. Lastly, and although not part of the objective of this work, INM has also been used experimentally in animals in the implementation of biological techniques for nerve repair that will serve as coadjutants in nerve regeneration in the near future.<a class="elsevierStyleCrossRefs" href="#bib0275"><span class="elsevierStyleSup">19–24</span></a></p><p id="par0360" class="elsevierStylePara elsevierViewall">In the case of tumors settled on the peripheral nerve, the goal of treatment is complete exeresis with minimal damage to the nerve. Within these tumors we must distinguish resectable nerve tumors from unresectable cases. The former avoid fascicular groups without penetrating them, that is, they are extraneural, so they can be enucleated without having to break nerve continuity, such as schwannomas, for example, with an excellent functional prognosis. There are no studies proving that optimal results would not be achieved without using INM.</p><p id="par0365" class="elsevierStylePara elsevierViewall">On the other hand, it is in unresectable tumors (solitary neurofibroma, hemangioma of the Schwann sheath, neural fibrolipoma) that INM is most useful. These tumors infiltrate all the elements that constitute the nerve and it is impossible to excise them completely without altering the nerve fibers, as in the case of fibrolipoma of the median nerve reported in our series. Therefore, they are intraneural and it would be important to know which fascicles are functionally viable in order to preserve them, even though in many cases this will not be possible and we will need to resort to nerve grafts or nerve conduits.<a class="elsevierStyleCrossRef" href="#bib0270"><span class="elsevierStyleSup">18</span></a></p><p id="par0370" class="elsevierStylePara elsevierViewall">In the literature review we found very few specific references to the use of this technique in peripheral nerve tumoral surgery related to the field of Orthopedics, not being able to support its generalized use in our field, although we found numerous studies reporting excellent results in cases suffering traumatic lesions of the peripheral nerve and brachial plexus, as well as in facial nerve surgery.<a class="elsevierStyleCrossRefs" href="#bib0295"><span class="elsevierStyleSup">23–25</span></a> The majority of articles dealing with this technique refer to the fields of Otolaryngology and Neurosurgery, particularly surgery of the skull base, and are usually reviews of case series or isolated case reports.<a class="elsevierStyleCrossRefs" href="#bib0305"><span class="elsevierStyleSup">25–28</span></a> It is worth highlighting the extensive experience existing in the case of schwannomas of the vestibulocochlear nerve (eighth cranial nerve),<a class="elsevierStyleCrossRefs" href="#bib0305"><span class="elsevierStyleSup">25–30</span></a> including the article by Oh et al.,<a class="elsevierStyleCrossRef" href="#bib0320"><span class="elsevierStyleSup">28</span></a> who perfectly described the monitoring technique for neurinomas in this location, very similar to that used at our center. Kwok et al.<a class="elsevierStyleCrossRef" href="#bib0335"><span class="elsevierStyleSup">31</span></a> reported excellent results in the case of benign tumors of the brachial plexus, and maintained that its generalized use has minimized intraoperative complications.</p><p id="par0375" class="elsevierStylePara elsevierViewall">We found up to 3 reports of the application of this technique in the case of schwannomas of the posterior tibial nerve as a cause of tarsal tunnel syndrome, a pathology which is included in the differential diagnosis of atypical talalgias.<a class="elsevierStyleCrossRefs" href="#bib0340"><span class="elsevierStyleSup">32–35</span></a> Two of these publications included recommendations for the systematic use of this technique to avoid iatrogenic lesions deriving from the surgical intervention.<a class="elsevierStyleCrossRefs" href="#bib0340"><span class="elsevierStyleSup">32,33</span></a> In our series, we reported 3 schwannomas of the posterior tibial nerve, with complete recovery and intact functionality in all cases (<a class="elsevierStyleCrossRefs" href="#fig0010">Figs. 2 and 3</a>).</p><p id="par0380" class="elsevierStylePara elsevierViewall">Following the considerations described by Mohler and Hanel<a class="elsevierStyleCrossRef" href="#bib0360"><span class="elsevierStyleSup">36</span></a> in his article, there is a discrepancy between the previous neurophysiological condition and the symptoms, in the case of closed lesions of peripheral nerves, and the final functional results, with considerable variability between the different peripheral nerves and between one patient and another. For this reason, we need more precise tools that can determine if it is possible to perform conservative surgery of the affected nerve during the intervention.</p><p id="par0385" class="elsevierStylePara elsevierViewall">Lastly, the authors believe that, as is already occurring in neurosurgery and spinal surgery, the advent and development of these monitoring techniques mean we are not far from the need, not only from a therapeutic standpoint but also from the medical-legal, to make these diagnostic tools available to our patients in order to achieve a better functional result, which is the ultimate goal of our treatment. Our results are excellent from the functional standpoint, with only 2 patients with schwannoma suffering a partial sensory deficit, and with this deficit persisting in only 1 of the patients after 3 years of monitoring. The best results in traumatic cases were obtained with median nerve grafts.</p></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0115">Study limitations</span><p id="par0390" class="elsevierStylePara elsevierViewall">The main limitations of our study came from its methodology, as it was a retrospective descriptive study. We have not compared our results with those of interventions performed without monitoring, although it is worth mentioning that this kind of surgery is not carried out without INM at our center since 2009.</p></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0120">Conclusions</span><p id="par0395" class="elsevierStylePara elsevierViewall">Our results indicate that the use of INM in peripheral nerve surgery is a useful technique, especially indicated in secondary surgery of traumatic lesions in which the conventional neurophysiology and symptoms point to an irreversible neurological lesion. It would be necessary to conduct comparative prospective studies to ensure that the technique is essential and indispensable in all peripheral nerve interventions.</p></span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0125">Level of evidence</span><p id="par0400" class="elsevierStylePara elsevierViewall">Level of evidence <span class="elsevierStyleSmallCaps">IV</span>.</p></span><span id="sec0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0130">Ethical disclosures</span><span id="sec0065" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0135">Protection of people and animals</span><p id="par0405" class="elsevierStylePara elsevierViewall">The authors declare that this investigation adhered to the ethical guidelines of the Committee on Responsible Human Experimentation, as well as the World Medical Association and the Declaration of Helsinki.</p></span><span id="sec0070" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0140">Confidentiality of data</span><p id="par0410" class="elsevierStylePara elsevierViewall">The authors declare that they have followed the protocols of their workplace on the publication of patient data.</p></span><span id="sec0075" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0145">Right to privacy and informed consent</span><p id="par0415" class="elsevierStylePara elsevierViewall">The authors declare having obtained written informed consent from patients and/or subjects referred to in the work. This document is held by the corresponding author.</p></span></span><span id="sec0080" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0150">Conflict of interests</span><p id="par0420" class="elsevierStylePara elsevierViewall">The authors have no conflict of interests to declare.</p></span></span>" "textoCompletoSecciones" => array:1 [ "secciones" => array:14 [ 0 => array:3 [ "identificador" => "xres521657" "titulo" => "Abstract" "secciones" => array:5 [ 0 => array:2 [ "identificador" => "abst0005" "titulo" => "Introduction" ] 1 => array:2 [ "identificador" => "abst0010" "titulo" => "Objective" ] 2 => array:2 [ "identificador" => "abst0015" "titulo" => "Patients and methods" ] 3 => array:2 [ "identificador" => "abst0020" "titulo" => "Results" ] 4 => array:2 [ "identificador" => "abst0025" "titulo" => "Conclusions" ] ] ] 1 => array:2 [ "identificador" => "xpalclavsec542240" "titulo" => "Keywords" ] 2 => array:3 [ "identificador" => "xres521656" "titulo" => "Resumen" "secciones" => array:5 [ 0 => array:2 [ "identificador" => "abst0030" "titulo" => "Introducción" ] 1 => array:2 [ "identificador" => "abst0035" "titulo" => "Objetivo" ] 2 => array:2 [ "identificador" => "abst0040" "titulo" => "Pacientes y método" ] 3 => array:2 [ "identificador" => "abst0045" "titulo" => "Resultados" ] 4 => array:2 [ "identificador" => "abst0050" "titulo" => "Conclusiones" ] ] ] 3 => array:2 [ "identificador" => "xpalclavsec542241" "titulo" => "Palabras clave" ] 4 => array:2 [ "identificador" => "sec0005" "titulo" => "Introduction" ] 5 => array:3 [ "identificador" => "sec0010" "titulo" => "Materials and methods" "secciones" => array:4 [ 0 => array:2 [ "identificador" => "sec0015" "titulo" => "Methodology: technical description of neurophysiological monitoring" ] 1 => array:2 [ "identificador" => "sec0020" "titulo" => "Practical implications for intraoperative decision making" ] 2 => array:2 [ "identificador" => "sec0025" "titulo" => "How do we know if an explored nerve is functional and therefore viable?" ] 3 => array:2 [ "identificador" => "sec0030" "titulo" => "What to do in case of lack of response to nerve action potential?" ] ] ] 6 => array:2 [ "identificador" => "sec0035" "titulo" => "Results" ] 7 => array:2 [ "identificador" => "sec0040" "titulo" => "Discussion" ] 8 => array:2 [ "identificador" => "sec0045" "titulo" => "Study limitations" ] 9 => array:2 [ "identificador" => "sec0050" "titulo" => "Conclusions" ] 10 => array:2 [ "identificador" => "sec0055" "titulo" => "Level of evidence" ] 11 => array:3 [ "identificador" => "sec0060" "titulo" => "Ethical disclosures" "secciones" => array:3 [ 0 => array:2 [ "identificador" => "sec0065" "titulo" => "Protection of people and animals" ] 1 => array:2 [ "identificador" => "sec0070" "titulo" => "Confidentiality of data" ] 2 => array:2 [ "identificador" => "sec0075" "titulo" => "Right to privacy and informed consent" ] ] ] 12 => array:2 [ "identificador" => "sec0080" "titulo" => "Conflict of interests" ] 13 => array:1 [ "titulo" => "References" ] ] ] "pdfFichero" => "main.pdf" "tienePdf" => true "fechaRecibido" => "2014-06-01" "fechaAceptado" => "2014-11-08" "PalabrasClave" => array:2 [ "en" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "Keywords" "identificador" => "xpalclavsec542240" "palabras" => array:5 [ 0 => "Intraoperative neurophysiological monitoring" 1 => "Peripheral nerve" 2 => "Traumatic neuroma" 3 => "Schwannoma" 4 => "Neurogenic tumors of peripheral nerve" ] ] ] "es" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "Palabras clave" "identificador" => "xpalclavsec542241" "palabras" => array:5 [ 0 => "Monitorización neurofisiológica intraoperatoria" 1 => "Nervio periférico" 2 => "Neuromas traumáticos" 3 => "Schwannoma" 4 => "Tumores neurogénicos de nervio periférico" ] ] ] ] "tieneResumen" => true "resumen" => array:2 [ "en" => array:3 [ "titulo" => "Abstract" "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Introduction</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Intraoperative neurophysiological monitoring has experienced a spectacular development in the past 20 years, particularly in the fields of neurosurgery and spine surgery. It has become a useful, almost indispensable tool in preventing nerve damage during surgery. The aim of this article is to describe the intraoperative technique and analyze its results in the field of peripheral nerve surgery.</p></span> <span id="abst0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Objective</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">To describe the usefulness of a technique in peripheral nerve surgery, the technique used and the experience in a center.</p></span> <span id="abst0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">Patients and methods</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">A retrospective study was conducted on 30 cases of peripheral nerve surgery performed in this center from 2009 to 2013, using the intraoperative monitoring technique.</p></span> <span id="abst0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Results</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">Of the total of 13 peripheral nerve tumors recorded, there were 11 excellent results and 2 good results, one temporary hypoesthesia and one with almost complete sensory, except for motor recovery. Traumatic injury was recorded in 17 cases, of which 6 required performing a graft, and the remaining 11 cases only neurolysis was performed, with complete motor and sensory recovery.</p></span> <span id="abst0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Conclusions</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">Intraoperative neurophysiological monitoring is a useful tool in the secondary surgery of peripheral nerve injury and the intraneural tumor pathology.</p></span>" "secciones" => array:5 [ 0 => array:2 [ "identificador" => "abst0005" "titulo" => "Introduction" ] 1 => array:2 [ "identificador" => "abst0010" "titulo" => "Objective" ] 2 => array:2 [ "identificador" => "abst0015" "titulo" => "Patients and methods" ] 3 => array:2 [ "identificador" => "abst0020" "titulo" => "Results" ] 4 => array:2 [ "identificador" => "abst0025" "titulo" => "Conclusions" ] ] ] "es" => array:3 [ "titulo" => "Resumen" "resumen" => "<span id="abst0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Introducción</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">La monitorización neurofisiológica intraoperatoria ha experimentado un espectacular desarrollo en los últimos 20 años, particularmente en campos como la neurocirugía y la cirugía de raquis. Se ha constituido en una herramienta muy útil en la prevención de daño neurológico durante la cirugía, si bien su utilidad en la cirugía del nervio periférico en el área de traumatología y ortopedia no ha sido constatada.</p></span> <span id="abst0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Objetivo</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Describir exhaustivamente la técnica de monitorización neurofisiológica intraoperatoria y secundariamente comunicar la experiencia de nuestro centro.</p></span> <span id="abst0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Pacientes y método</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">Estudio descriptivo retrospectivo de 30 casos de cirugía de nervio periférico realizadas en nuestro centro en el período 2009–2013. Descripción pormenorizada de la técnica de monitorización neurofisiológica intraoperatoria utilizada.</p></span> <span id="abst0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0055">Resultados</span><p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Registramos 13 tumores del nervio periférico, de estos, obtuvimos 11 resultados excelentes y 2 buenos, uno con hipoestesia temporal y otro con recuperación motora casi completa aunque no sensitiva. Registramos 17 casos de lesiones traumáticas, en 6 casos fue necesaria la realización de injerto, en los 11 restantes solo realizamos neurolisis, con recuperación sensitiva y motora completa.</p></span> <span id="abst0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0060">Conclusiones</span><p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">La monitorización neurofisiológica intraoperatoria supone una herramienta útil en la cirugía secundaria de las lesiones del nervio periférico y en la enfermedad tumoral intraneural de dicho nervio.</p></span>" "secciones" => array:5 [ 0 => array:2 [ "identificador" => "abst0030" "titulo" => "Introducción" ] 1 => array:2 [ "identificador" => "abst0035" "titulo" => "Objetivo" ] 2 => array:2 [ "identificador" => "abst0040" "titulo" => "Pacientes y método" ] 3 => array:2 [ "identificador" => "abst0045" "titulo" => "Resultados" ] 4 => array:2 [ "identificador" => "abst0050" "titulo" => "Conclusiones" ] ] ] ] "NotaPie" => array:1 [ 0 => array:2 [ "etiqueta" => "☆" "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Please cite this article as: Herrera-Pérez M, Oller-Boix A, Pérez-Lorensu PJ, de Bergua-Domingo J, Gonzalez-Casamayor S, Márquez-Marfil F, et al. Monitorización neurofisiológica intraoperatoria en la cirugía del nervio periférico: descripción técnica y resultados en nuestro centro. Rev Esp Cir Ortop Traumatol. 2015;59:266–274.</p>" ] ] "multimedia" => array:6 [ 0 => array:7 [ "identificador" => "fig0005" "etiqueta" => "Figure 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 682 "Ancho" => 900 "Tamanyo" => 121797 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0055" class="elsevierStyleSimplePara elsevierViewall">Placement of electrodes in the ulnar nerve in a case of axonotmesis following a supracondylar humerus fracture treated by closed reduction and fixation with Kirschner wires.</p>" ] ] 1 => array:7 [ "identificador" => "fig0010" "etiqueta" => "Figure 2" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr2.jpeg" "Alto" => 814 "Ancho" => 600 "Tamanyo" => 73597 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0060" class="elsevierStyleSimplePara elsevierViewall">MRI scan showing a round lesion close to the posterior tibial nerve.</p>" ] ] 2 => array:7 [ "identificador" => "fig0015" "etiqueta" => "Figure 3" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr3.jpeg" "Alto" => 401 "Ancho" => 600 "Tamanyo" => 49963 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0065" class="elsevierStyleSimplePara elsevierViewall">Identification of the posterior tibial nerve and common fibular nerve (vessel-loop) and a well-defined schwannoma in the sensory superficial branches stemming from the posterior tibial nerve.</p>" ] ] 3 => array:7 [ "identificador" => "fig0020" "etiqueta" => "Figure 4" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr4.jpeg" "Alto" => 776 "Ancho" => 900 "Tamanyo" => 128700 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0070" class="elsevierStyleSimplePara elsevierViewall">Neurinoma of the common fibular nerve before the intervention.</p>" ] ] 4 => array:7 [ "identificador" => "fig0025" "etiqueta" => "Figure 5" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr5.jpeg" "Alto" => 604 "Ancho" => 900 "Tamanyo" => 105118 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0075" class="elsevierStyleSimplePara elsevierViewall">Neurinoma of the common fibular nerve after the intervention.</p>" ] ] 5 => array:6 [ "identificador" => "tbl0005" "etiqueta" => "Table 1" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "tabla" => array:2 [ "leyenda" => "<p id="spar0080" class="elsevierStyleSimplePara elsevierViewall">CFN: common fibular nerve; ENG: electroneurogram; INM: intraoperative neurophysiological monitoring; NAP: nerve action potential; Schw.: schwannoma.</p>" "tablatextoimagen" => array:1 [ 0 => array:2 [ "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="table-head " align="" valign="top" scope="col" style="border-bottom: 2px solid black"> \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Gender \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Age \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Diagnosis \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Prior ENG (SEDDON) \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Drugs used in anesthesia \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Type of INM \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Previous surgery \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Treatment \t\t\t\t\t\t\n \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">1 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Female \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">37 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Schw. median \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Normal \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sevoflurane \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">No \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Exeresis \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">2 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Male \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">13 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Schw. median \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Normal \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Propofol<span class="elsevierStyleHsp" style=""></span>+<span class="elsevierStyleHsp" style=""></span>remifentanil \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">No \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Exeresis \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">3 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Female \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">20 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Section median \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurotmesis \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sevoflurane \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurorrhaphy \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sural graft \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">4 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Female \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">42 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Schw. posterior tibial \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Normal \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Propofol<span class="elsevierStyleHsp" style=""></span>+<span class="elsevierStyleHsp" style=""></span>remifentanil \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">No \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Exeresis \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">5 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Female \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">51 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Section ulnar \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurotmesis \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sevoflurane \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurorrhaphy \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurolysis \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">6 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Male \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">5 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Paralysis ulnar \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neuropraxia \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sevoflurane \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">No \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurolysis \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">7 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Female \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">72 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Schw. ulnar \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Normal \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sevoflurane \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">No \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Exeresis \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">8 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Male \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">41 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Paralysis radial \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurotmesis \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sevoflurane \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">No \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurolysis \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">9 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Male \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">23 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Schw. tibial posterior \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Normal \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Propofol<span class="elsevierStyleHsp" style=""></span>+<span class="elsevierStyleHsp" style=""></span>remifentanil \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">No \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Exeresis \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">10 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Male \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">17 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Paralysis ulnar \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neuropraxia \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sevoflurane \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">No \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sural graft \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">11 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Female \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">36 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Section median \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurotmesis \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sevoflurane \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurorrhaphy \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurolysis \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">12 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Female \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">44 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Section ulnar \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurotmesis \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sevoflurane \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurorrhaphy \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurolysis \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">13 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Male \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">34 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Schw. median \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Normal \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sevoflurane \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">No \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Exeresis \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">14 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Female \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">25 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Schw. median \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Normal \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Propofol<span class="elsevierStyleHsp" style=""></span>+<span class="elsevierStyleHsp" style=""></span>remifentanil \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">No \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Exeresis \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">15 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Male \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">43 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Section ulnar \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurotmesis \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sevoflurane \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">No \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sural graft \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">16 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Male \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">71 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Section radial \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurotmesis \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sevoflurane \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurorrhaphy \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sural graft \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">17 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Male \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">30 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Section deep fibular \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurotmesis \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sevoflurane \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurorrhaphy \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sural graft \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">18 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Male \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">26 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Schw. radial \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Normal \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sevoflurane \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">No \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Exeresis \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">19 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Male \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">55 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Section radial sensory \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neuropraxia \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sevoflurane \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">No \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurolysis \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">20 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Male \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">63 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Paralysis radial \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurotmesis \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sevoflurane \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">No \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurolysis \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">21 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Male \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">18 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Schw. median \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Normal \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sevoflurane \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">No \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Exeresis \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">22 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Female \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">41 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Section posterior tibial \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurotmesis \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sevoflurane \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">No \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sural graft \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">23 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Male \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">71 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Paralysis sciatic \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neuropraxia \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sevoflurane \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">No \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurolysis \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">24 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Male \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">45 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Schw. CFN \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Normal \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sevoflurane \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">No \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Exeresis \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">25 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Male \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">57 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Fibrolipoma median \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neuropraxia \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sevoflurane \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">No \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurolysis \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">26 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Female \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">46 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Section median \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurotmesis \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sevoflurane \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">No \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurorrhaphy \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">27 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Male \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">6 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Paralysis ulnar \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neuropraxia \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sevoflurane \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">No \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurolysis \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">28 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Male \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">4 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Paralysis ulnar \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neuropraxia \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Propofol<span class="elsevierStyleHsp" style=""></span>+<span class="elsevierStyleHsp" style=""></span>remifentanil \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">No \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Neurolysis \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">29 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Female \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">19 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Schw. radial \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Normal \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sevoflurane \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">No \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Exeresis \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="char" valign="top">30 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Male \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">34 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Schw. median \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Normal \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Sevoflurane \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">NAP \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">No \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Exeresis \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] "imagenFichero" => array:1 [ 0 => "xTab842430.png" ] ] ] ] ] ] "bibliografia" => array:2 [ "titulo" => "References" "seccion" => array:1 [ 0 => array:2 [ "identificador" => "bibs0005" "bibliografiaReferencia" => array:36 [ 0 => array:3 [ "identificador" => "bib0185" "etiqueta" => "1" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Nerve repair" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:1 [ 0 => "R. 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Year/Month | Html | Total | |
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2024 November | 2 | 0 | 2 |
2024 October | 44 | 12 | 56 |
2024 September | 62 | 10 | 72 |
2024 August | 55 | 22 | 77 |
2024 July | 54 | 10 | 64 |
2024 June | 55 | 5 | 60 |
2024 May | 44 | 9 | 53 |
2024 April | 47 | 9 | 56 |
2024 March | 72 | 14 | 86 |
2024 February | 56 | 15 | 71 |
2024 January | 79 | 14 | 93 |
2023 December | 68 | 21 | 89 |
2023 November | 69 | 22 | 91 |
2023 October | 83 | 20 | 103 |
2023 September | 63 | 12 | 75 |
2023 August | 59 | 18 | 77 |
2023 July | 81 | 14 | 95 |
2023 June | 83 | 10 | 93 |
2023 May | 99 | 26 | 125 |
2023 April | 92 | 13 | 105 |
2023 March | 85 | 16 | 101 |
2023 February | 82 | 19 | 101 |
2023 January | 88 | 22 | 110 |
2022 December | 83 | 30 | 113 |
2022 November | 66 | 32 | 98 |
2022 October | 51 | 21 | 72 |
2022 September | 47 | 28 | 75 |
2022 August | 54 | 30 | 84 |
2022 July | 64 | 16 | 80 |
2022 June | 32 | 15 | 47 |
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2022 April | 54 | 25 | 79 |
2022 March | 96 | 19 | 115 |
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2021 December | 58 | 12 | 70 |
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2020 December | 5 | 2 | 7 |
2018 February | 5 | 1 | 6 |
2018 January | 3 | 1 | 4 |
2017 December | 9 | 1 | 10 |
2017 November | 8 | 0 | 8 |
2017 October | 10 | 1 | 11 |
2017 September | 5 | 1 | 6 |
2017 August | 11 | 0 | 11 |
2017 July | 10 | 1 | 11 |
2016 October | 0 | 4 | 4 |
2016 September | 0 | 2 | 2 |
2016 July | 0 | 1 | 1 |
2016 May | 0 | 8 | 8 |
2016 March | 0 | 1 | 1 |
2016 January | 0 | 1 | 1 |
2015 August | 0 | 1 | 1 |
2015 July | 0 | 1 | 1 |