第二掌背动脉皮瓣血管的临床分型及其意义

Clinical types of the second dorsal metacarpal artery in flap transfer

根据３４侧成人新鲜标本解剖和２４侧手术观察，从临床应用角度对第二掌背动脉进行分型．①按血管的起始部位分为三型：Ⅰ型占８７．５％，主干长８．２±１．６ ｃｍ，岛状皮瓣转位可修复拇指尖：Ⅱ型占１２．５％，主干长约５．５ｃｍ，岛状转位不能修复拇指尖．Ⅲ型为缺如型．②按第二掌背动脉主干穿骨间肌否分为二亚型；ａ亚型主干在骨间肌表面行走，手术分离容易；ｂ亚型主干部分穿行骨间肌，手术分离较要难。

The course and distribution of the second dorsal metacarpal artery (SDMA) were observed on 34 sides of fresh upper limb specimens and 24 clinical operations. The SDMA can be divided into two types. Type Ⅰ (87. 2%) ,the SDMA originates mostly from radial artery and is about 8. 2 cm in length,which can be used as the pedicle to repair the distal thumb defects. Type Ⅱ(12. 5％) the SDMA originates mostly from the deep palmar arch and is about 5. 5 cm in length ,which is not long enough to repair the distal thumb defects. Each type is subdivided into two groups according to whether or not the SDMA perforating the second dorsal interosseous muscle.