Crawshaw H M, Quist W C, Serallach E, Valeri C R, LoGerfo F W
Arch Surg. 1980 Nov;115(11):1280-4. doi: 10.1001/archsurg.1980.01380110028004.
We investigated the flow disturbance that occurs at the distal end-to-side anastomosis. Clear plastic model end-to-side anastomoses were constructed with inlet angles of 15 degrees and 45 degrees. Flow patterns were visualized with steady and pulsatile flow using a dye-injection technique. Multiple lateral pressure measurements were made in the region of the anastomosis. A laser Doppler anemometer was used to measure near-wall velocity. Flow disturbance was minimal when the inlet angle was low and the proximal outflow segment occluded. Patency of the proximal outflow segment or a high inlet angle may result in areas of boundary-layer separation, with corresponding adverse pressure gradients at the anastomosis. These separation regions are characterized by low near-wall velocity, which may contribute to anastomotic hyperplasia.
我们研究了远端端侧吻合处出现的血流紊乱情况。构建了入口角度为15度和45度的透明塑料模型端侧吻合。使用染料注射技术通过稳定流和脉动流来观察血流模式。在吻合区域进行了多次侧向压力测量。使用激光多普勒风速仪测量近壁速度。当入口角度较低且近端流出段闭塞时，血流紊乱最小。近端流出段通畅或入口角度较高可能会导致边界层分离区域，在吻合处出现相应的不利压力梯度。这些分离区域的特征是近壁速度较低，这可能会导致吻合处增生。
