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Inicio Revista Española de Cirugía Ortopédica y Traumatología (English Edition) Hip X-rays versus 3-D CT-scans in Patients with Cerebral Palsy
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Vol. 51. Issue 1.
Pages 30-34 (January - February 2007)
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Vol. 51. Issue 1.
Pages 30-34 (January - February 2007)
Original papers
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Hip X-rays versus 3-D CT-scans in Patients with Cerebral Palsy
Evaluación de la radiografía de cadera frente a la tomografía tridimensional en pacientes con parálisis cerebral
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F. Fernández-Palazzi
Corresponding author
federicofernandez@cantv.net

Corresponding author: Centro Médico de Caracas. San Bernardino. 1011 Caracas. Venezuela.
, A.J. Guillén
Department of Pediatric Orthopedics and Neuro-Orthopedics. Caracas Medical Center. Caracas, Venezuela
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Introduction

Seventeen patients diagnosed with cerebral palsy were studied to assess the results of X-rays vs. 3D CT scans of the hip.

Materials and methods

3 X-ray parameters were compared with 4 3D CT scan parameters.

Results

The results obtained showed a significant correlation between X-rays and CT scans. According to the assessment of the Weinberg Central Edge (CE) angle there were 28 dysplastic hips and 6 normal hips. According to the Reimers index there were 29 dysplastic hips and 5 normal hips. According to the acetabular index there were 30 subluxated hips and 4 normal hips. Using CT scan parameters the mean value of the femoral neck-shaft angle was 147.09° (range: 127°-175°), a higher-than-normal figure. The mean value of the femoral anteversion angle was 33.43° (range 9°-50°), also higher than usual. The mean axial acetabular index was 120.29°, with a normal value of 101.6° at 9 years of age associated with acetabular flattening. The mean acetabular anteversion angle was 13.11° (range 7°-24°), which indicated a parity of results.

Conclusions

X-rays are necessary for the diagnosis and prognosis of hip dysplasia. Acetabular coverage and presurgery assessment and planning must be done based on 3D CT scans.

Key words:
cerebral palsy
hip
X-rays
axial C
Introducción

Se estudiaron 17 pacientes con diagnóstico de parálisis cerebral, para evaluar la utilidad de los rayos X de cadera frente a la tomografía 3D.

Material y método

Se compararon 3 parámetros radiológicos con 4 parámetros tomográficos tridimensionales.

Resultados

Se obtuvieron resultados que correlacionan significativamente a los estudios radiológicos con los tomográficos. El ángulo CE de Wieberg mostró 28 caderas displásicas y 6 normales. El índice de Reimers 29 caderas displásicas y 5 dentro de límites normales. El índice acetabular 4 caderas normales y 30 caderas subluxadas. En los parámetros tomográficos el ángulo cérvico-diafisiario femoral presentó una media de 147,09° con un rango entre 127° y 175°, lo que demuestra un promedio más alto de lo normal. El ángulo de anteversión femoral obtuvo los siguientes resultados: media de la muestra 33,43°, rango superior 50°, rango inferior 9°. Se observa un valor aumentado de la anteversión. El índice acetabular axial mostró un promedio de índice axial acetabular de 120,29°, siendo el valor normal 101,6° para los 9 años de edad, lo que se asocia con aplanamiento del acetábulo. El ángulo de anteversión acetabular presenta una media de 13,11° con un rango entre 24° y 7°, lo que representa una paridad en los resultados.

Conclusiones

La indicación de radiografías está justificada para el diagnóstico y pronóstico de displasia de cadera. La cobertura acetabular y las evaluaciones para cirugías deben estudiarse y programarse con tomografías tridimensionales.

Palabras clave:
parálisis cerebral
cadera
radiología
tomografía computarizada tridimensional
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Copyright © 2007. Sociedad Española de Cirugía Ortopédica y Traumatología (SECOT). All rights reserved
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