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Int. j. morphol ; 27(4): 1059-1061, dic. 2009. ilus
Article in English | LILACS | ID: lil-582052

ABSTRACT

Transligamentous variant of the recurrent motor branch is having a higher risk of getting damage during both endoscopic and open carpal tunnel releases. The incidence of the transligamentous variant is about 7 percent to 80 percent world wide. This wide variation of the incidence could be due to the failure of identification of the distal edge of the flexor retinaculum from the obliquely oriented fascia that runs from the distal edge. We used two criteria to identify the distal edge; the abrupt change in the thickness of the flexor retinaculum and its colour change in cross section. The incidence of transligamentous variant is rare and the reported high incidence could be due to an error in identification of the distal edge of the flexor retinaculum as shown by Kosin (1998).


Las variantes transligamentosas del ramo motor recurrente tienen un mayor riesgo de recibir daños durante la endoscopía y liberación abierta del túnel carpiano. La incidencia de la variante transligamentosa es de, aproximadamente, 7 a 80 por ciento en todo el mundo. Esta amplia variación de la incidencia podría deberse a la falla en la identificación del borde distal del retináculo flexor de la fascia de orientación oblicua que va desde el borde distal. Hemos utilizado dos criterios para identificar el borde distal, el brusco cambio en el grosor del retináculo flexor y su cambio de color en la sección transversal. La incidencia de la variante transligamentosa fue rara y el informe de la alta incidencia podría deberse a un error en la identificación del borde distal del retináculo flexor, como lo demuestra Kosin (1998).


Subject(s)
Humans , Male , Adult , Female , Middle Aged , Aged, 80 and over , Hand/innervation , Median Nerve/anatomy & histology , Median Nerve/abnormalities , Cadaver , Sri Lanka
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