对86侧背闼肌及其内部血管进行了分段观测。1.背阔肌的节段动脉在肌肉的分布具有一定的规律性。2.根据节段动脉的支数可将背阔肌分为4～6个节段肌瓣,其中以外3、4段最薄,血管蒂最长。3.胸背动脉分出内、外侧支的位置在肩胛骨下角平面上方18.5mm、背阔肌外侧缘内侧21.5mm.文中设计了四种形态的节段肌瓣供临床选用参考,并讨论了截取肌瓣的手术入路。 The 86 sides of the dorsal muscle and its internal blood vessels were sub-observed. 1. The latissimus dorsi artery in the distribution of muscle has a certain regularity. 2. According to the number of segmental artery can be divided into latissimus dorsi muscle segments of 4-6 segments, of which 3, 4 thinnest, the longest pedicle. Thoracic and dorsal artery branches, the lateral branch position in the lower blade of the scapula above the plane 18.5mm, the lateral dorsal lateral margin of 21.5mm.This article designed four forms of segmental muscle flap for clinical selection reference, and discusses the interception Muscle flap surgery approach.