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目的：比较利用受伤同侧肢体前臂的四种游离微型皮瓣修复手指中小面积皮肤缺损的临床疗效差异。这四种游离皮瓣为：桡动脉掌浅支穿支皮瓣(superficial palmar branch of the radial artery flaps,SPBRA flaps),骨间背动脉穿支皮瓣(posterior interosseous perforator flap,PIPF),尺动脉腕上支穿支皮瓣(ulnar artery perforator free flaps,UAPF flaps)和游离动脉化的静脉皮瓣(arterialized venous flap,AVF)。