Reconstruction of anorectal function through end-to-side neurorrhaphy by autonomic nerves and somatic nerve in rats.
J Surg Res
; 180(2): e63-71, 2013 Apr.
Article
en En
| MEDLINE
| ID: mdl-22521222
ABSTRACT
BACKGROUND:
End-to-side nerve repair is a new tool in managing certain nerve injuries. In previous studies, it was limited to somatic nerves. Herein, we evaluate the feasibility of anorectal reinnervation after end-to-side coaptation of autonomic nerve to somatic nerve. MATERIALS ANDMETHODS:
Forty adult male Sprague-Dawley rats were randomly divided into three groups end-to-side coaptation group (n = 16), the left L6 and S1 spinal nerves were transected, and the distal stump of L6 ventral root (L6VR) was sutured to L4VR (L4VR) through end-to-side neurorrhaphy; no coaptation group (n = 12), rats received the same operation as the end-to-side coaptation group but without coaptation; and control group (n = 12), rats received the same operation as the end-to-side coaptation group but the L6VR was preserved. At 16 wk, using double retrograde tracing and histomorphological technique and anorectal manometry, morphological and functional properties of regenerated nerve were investigated.RESULTS:
Retrograde tracing indicated that the new neural pathway was established and the main nerve regeneration mechanism was axon collateral sprouting. Histology showed good axonal regeneration with end-to-side neurorrhaphy. The wet weight and morphology of left tibialis anterior muscles appeared no detrimental effect on donor nerve. Anorectal manometry showed good anorectal functional recovery.CONCLUSIONS:
These results suggest that the somatic motor axon ingrowth into autonomic nerve could be through collateral sprouting after end-to-side coaptation of autonomic nerve to somatic nerve. Our innovative technique of end-to-side coaptation may be of great value in anorectal reinnervation without functional impairment of the donor somatic nerve.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Canal Anal
/
Recto
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Anastomosis Quirúrgica
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Transferencia de Nervios
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Vías Autónomas
Límite:
Animals
Idioma:
En
Año:
2013
Tipo del documento:
Article