Applied microanatomical study of availible length of C7 nerve / 中华显微外科杂志

ABSTRACT

Objective To relatively prolong the length of C7 nerve through microanatomical study and carry out direct anastomosis between the end of avulsed nerve and contralateral C7. Methods Fifteen cadaveric specimens and 30 sides of the adult brachial plexus was dissected. The C7 nerve was confirmed and measured by using electric vernier caliper. Parameters as follow the length of C7 nerve from root to trunk; the length of C7 nerve from root to division(anterior and posterior division); transverse and longitudinal diameter of C7 nerve in root site, combination site between trunk and division, end site of anterior and posterior division. After dissected the nerve adventitia of binding site between division and cord and cut the distal end of anterior and posterior division, the length of C7 nerve from root to division (anterior and posterior division)was measured again. Results The measured result of the length C7 nerve the length of C7 from root to trunk (45.87 ± 10.43)mm; Before micro-dissected, the length of C7 from root to anterior division (61.14 ±13.44)mm; the length of C7 from root to posterior division (54.63 ± 11.35)mm after micro-dissected, the length of C7 from root to anterior division (74.67±12.86)mm; the length of C7 from root to posterior division(68.73± 11.86)mm; the prolonged length of anterior division (13.15± 4.26)mm; the prolonged length of posterior division (14.21 ± 6.98)mm. Conclusion Through dessecting the adventitia of binding site of division (anterior and posterior division) and cord of C7 nerve. The length of C7 nerve can be relatively prolonged.