拇指指背动脉的应用解剖

Applied anatomy of the dorsal digital artery of the thumb

目的 :为拇指动脉损毁或断指再植失败的病例提供第二条血供通路的解剖学基础。方法 :新鲜成人手标本 40个 ,分别进行血管ABS灌注 ,血管造影 ,透明标本 ,显微解剖观察。结果 :拇指背动脉来自桡动脉的腕背段 ,起始处外径 (0 .7± 0 .2 )mm (0 .5～ 1.2mm) ,部位恒定 ,出现率为 80 %。在拇指掌指关节处发出 2～ 3个分支 ,与拇指桡掌侧固有动脉及拇指尺掌侧固有动脉之间在拇指近节指腹近侧形成环状吻合。结论 :拇指指背动脉可应用于拇指桡掌侧固有动脉和拇指尺掌侧固有动脉损毁或断指再植失败的病例 ,为它们提供第二条血供通路 ,解决血管危象。

Objective: To provide the anatomical basis for the bl oo d supply of replantation of the severed proximal thumb.Methods: Forty fresh hand specimens were employed with ABS infusion, transparenc y, micro-dissection and macro-dissection and their vascular organizations were ob served.Results:The dorsal artery of the thumb derived from the dorsal carpal branch of the radial artery whose outer diameter was 0.7±0.2 mm (0.5～1.2 mm) with 80% occurrence.The dorsal digital artery of thumb had 2～3 branches to form circular anastomosis with the radial dorsal proper artery of the thumb and ulnar dorsal proper artery of the thumb near the base of the proximal thumb.Conclusion:The dorsal digital arter y of the thumb could serve as the second route for the blood supply of the replantation with the injuried radial dorsal artery of the thumb and ulnar dorsal proper artery of the thumb and solve the vascular crisis.