Determined by the relation between the FMDA and the interosseous muscle, the FMDA vascular patterns were classified as type I (FMDA courses superficially on the IOM),type 2 (FMDA lays in the IOM) and type 3 (FMDA lays beneath the IOM).

• 第一跖背动脉起始处距体表距离 ( 9.；12± 3