• 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° and 45°. 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.
(Arch Surg 115:1280-1284, 1980)
Crawshaw HM, Quist WC, Serrallach E, Valeri CR, LoGerfo FW. Flow Disturbance at the Distal End-to-Side AnastomosisEffect of Patency of the Proximal Outflow Segment and Angle of Anastomosis. Arch Surg. 1980;115(11):1280-1284. doi:10.1001/archsurg.1980.01380110028004