脊髓下段后索动脉供应的应用解剖

Applied anatomy of arteries in lower segment of posterier funiculus of spinal

目的 为脊髓下段后索切开行周围神经游离移植或转位桥接术提供解剖学资料。方法 观测15具(30侧)成人尸体标本T_(10)-L_1脊柱平面的脊髓后动脉及动脉吻合的位置、管径及出现率。结果 脊髓后动脉在脊髓后外侧沟与后正中沟之间,呈连续或断续分布,出现率100％,平均管径为0.46mm,距后正中沟距离平均2.2mm,距后外侧沟距离平均为0.54mm。两侧间无显著差异。脊髓后动脉间吻合动脉的出现率为33％,平均管径0.40mm。结论 脊髓后动脉是脊髓下段后索区域的主要供血来源。脊髓后索纵行切口选择在离后正中沟1.5mm处损伤血管的可能性较小。

Objective To provide anatomical data of incision of the lower segment of the posterior funiculus of spinal cord in dissociation and transposition bridging of peripheral nerve. Methods Location, diameter and occurrence rate of the posterior spinal arteries (PSA) and their anastomoses were observed and measured on fifteen adult specimens. Results The PSA were located between the posterolateral sulcus (PLS) and the posteromededian sulcus (PMS). Their distribution were continuous or discontinuous. Their occurrence rate was 100% and their mean diameter was 0. 46mm. The mean distance of the PSA from the PMS was 2. 20mm and was 0. 54mm from the PLS. There was no significant difference between the two PSA. The occurrence rate of anastomosis bewteen the two PSA was 33%,and the mean diameter of the anastomotic arteries was 0. 40mm. Conclusion The PSA is the main source of blood supply of the lower segement of the posterior funiculus of spinal cord. The possibility of vascular injury will be small if the longitudinal incision of the posterior funiculus selected where it is 1. 5mm from the PMS.