Sonographic Findings of the Bifid Median Nerve and Persistent Median Artery in Carpal Tunnel: A Preliminary Study in Chinese Individuals
Clinics
;
72(6): 358-362, June 2017. tab, graf
Artículo
en Inglés
| LILACS
| ID: biblio-840091
ABSTRACT
OBJECTIVE:
The aim of this study was to investigate the prevalence of anatomic variations of the bifid median nerve, persistent median artery and persistent median vein in Chinese individuals and their relationship with carpal tunnel syndrome.METHODS:
One hundred and sixty median nerves were examined using ultrasonography and colour Doppler ultrasonography. The location, shape, and size of the bifid median nerve, persistent median artery and persistent median vein were recorded. The cross-sectional area of the bifid median nerve (two trunks) was measured at the level of the pisiform.RESULTS:
Among the 160 wrists examined, a bifid median nerve was observed in 15 (9.4%) wrists, and a persistent median artery was observed in 12 (7.5%) wrists. These two variations either coexisted or were observed independently, and the probability of coexistence (6.3%) was higher than the probability of existing independently (bifid median nerve only 3.1%, persistent median artery only 1.3%). The cross-sectional area of the radial trunk was greater than (13 in 15, 86.7%) the cross-sectional area of the ulnaris trunk. Persistent median vein was observed in 9 wrists (5.6%).CONCLUSIONS:
The persistent median artery and bifid median nerve tend to coexist, and the persistent median vein sometimes runs parallel to the persistent median artery. Their positional relationship in carpal tunnel is uncertain, and thus, preoperative ultrasound is necessary. These three variations do not present any additional risk for the development of carpal tunnel syndrome.
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Arterias
/
Muñeca
/
Síndrome del Túnel Carpiano
/
Nervio Mediano
Tipo de estudio:
Estudio diagnóstico
/
Estudio de etiología
/
Factores de riesgo
Límite:
Femenino
/
Humanos
/
Masculino
Idioma:
Inglés
Revista:
Clinics
Asunto de la revista:
Medicina
Año:
2017
Tipo del documento:
Artículo
País de afiliación:
China
Institución/País de afiliación:
Shanghai Jiaotong University/CN
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