Objective To explore the clinical effect that the first metatarsal dorsal artery(FMDA) reversed flap repair hallux bone reveal.
目的探讨第一跖背动脉（FMDA）逆行岛状皮瓣修复拇趾骨外露的临床应用效果。
Objective: to study methodology of ultrasonography of the first metatarsal dorsal artery (FMDA) and to evaluate its clinical value.
目的：探讨第一跖背动脉的超声探测方法学及其临床应用价值。
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