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目的观测股前外侧皮瓣穿支及其源动脉CTA影像特点,为CTA在股前外侧穿支皮瓣“个性化”设计中的应用提供指导。方法收集28侧成人下肢CTA扫描数据,应用AW4.6工作站,重建三维图像,对旋股外侧动脉降支(DB)及其分支进行观测,统计数据包括穿支走行、数目、深筋膜穿出点位置,穿支源动脉走行、长度、内径。结果 DB可分为共干型(Ⅰ型,64.2%)和单支型(Ⅱ型,35.8%)。28侧下肢总计发现穿支37支,其中3侧未发现明显穿支(10.7%)、15侧发现1支(53.6%)、9侧发现2支(32.1%)、1侧发现3支(3.6%);Ⅰ型、Ⅱ型DB平均每侧穿支数为(1.5±0.78)支、(1.0±0.66)支,肌间隙型穿支占比为37%、40%。Ⅰ型、Ⅱ型DB初级源动脉起始内径为(1.3±0.31)mm、(1.0±0.54)mm。结论 CTA在观测股前外侧皮瓣穿支及及其源动脉解剖学参数方面具有较高应用价值,可以为股前外侧穿支皮瓣“个性化”设计提供指导。
Objective To observe the characteristics of percutaneous branch of lateral anterolateral skin flap and CTA of its source artery and provide guidance for the application of CTA in the design of anterior lateral femoral skin flap. Methods CTA scan data of lower extremities of 28 adult adults were collected. AW4.6 workstation was used to reconstruct the three-dimensional images. The descending branch of lateral femoral artery (DB) and its branches were observed. The statistical data included perforation, number, deep fascia piercing Point location, wear branch artery walking, length, diameter. Results DB can be divided into co-dry type (type I, 64.2%) and single branch type (type II, 35.8%). A total of 37 perforators were found in 28 lower extremities, with no obvious perforation (10.7%) on 3 sides, 1 (53.6%) on 15 sides, 2 (32.1%) on 9 sides, 3 %). Type I and type II DBs had an average number of (1.5 ± 0.78) branches per side (1.0 ± 0.66) branches, with a proportion of 37% and 40% in the type of intermuscular space. The initial diameter of type Ⅰ and type Ⅱ DB primary artery was (1.3 ± 0.31) mm, (1.0 ± 0.54) mm. Conclusions CTA is of great value in observing the anterolateral skin flaps perforator and the anatomy of its source artery and can provide guidance for the design of the periostral perforator flap.