股前外侧皮瓣穿支及其源动脉CTA影像特点观测

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。

Characteristics of CTA images of anterolateral thigh flap perforators and its source artery: CT-angiography study

Objective　To study the characteristics of CT-angiographic images of the anterolateral thigh perforators and its source arteries ,in order to guide individual design of the anterolateral thigh perforator flap. Methods CTA data of 28 adult lower limbs were collected and three-dimensional images were reconstructed by ADW 4.6 workstation for observation, including the number, course, and location of the perforators at the deep fascia level and the course, length, and caliber of the source arteries were also investigated.　Results Descending branch of lateral circumflex femoral artery(DB) can be classified as common trunk type (TypeⅠ, 64.2%) and non-common trunk type ( TypeⅡ, 35.8%). The total number of perforators of DB was 37. No obvious perforator were found in 3 case (10.7%), one perforator was found in 15 case (53.6%）, one perforator was found in 10 case (35.7%). The average number of TypeⅠand type Ⅱperforator count for （1.5±0.78） and（1.0±0.66）, respectively; septocutaneous perforators accounted for 37% and 40%, respectively. The caliber of the typeⅠand typeⅡDB as the primary source arteries was（1.3±0.31）mm and (1.0±0.54)mm. Conclusions CTA images have very high application value in the observation of anatomic parameter of perforators and its source artery. It can provide guidance for individual design of anterolateral thigh perforator flap.