Impact of in vivo ranges of the variances in the flow velocity waveforms and flow split ratio on the hemodynamic effects of the anastomotic cuff at distal end-to-side anastomosis.

Purpose: The blood flow inside distal end-to-side anastomoses may be affected by inlet flow velocity profiles and outlet blood distribution ratios. This study investigated the in vivo range of these variables and their impact on the hemodynamic effects of an anastomotic cuff using a computational fluid dynamics approach.

Materials And Methods: Predesigned expanded polytetrafluoroethylene cuffed grafts were used in 22 femoropopliteal bypasses and straight grafts were used for 10 cases.

Three-layered synthetic pericardial substitutes reduce postoperative pericardial adhesions.

Background: The development of postoperative pericardial adhesions increases the risk of cardiac reoperations. The purpose of this study was to test a new pericardial substitute (UBE sheet; UBE Industries, Ltd, Tokyo, Japan) that consists of 3 layers, namely, a middle layer of polyester inserted between 2 layers of silicone-urethane copolymer.

Methods: Before implantation into the animals, platelet adhesion to the UBE sheet was evaluated in vitro.