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Vein Anastomosis (vein + anastomosis)
Selected AbstractsArterialized venous free flap for reconstruction of burned faceMICROSURGERY, Issue 7 2008Martín Iglesias M.D. In this study, a forearm arterialized venous free flap (23 cm × 14 cm) was used in a 25-year-old male with facial burns sequels to reconstruct both cheeks, chin, lips, nose, columnella, nasal tip, and nostrils. It was arterialized by the facial artery to an afferent vein anastomosis. The venous flow was drained by four efferent vein to vein anastomoses. Although it developed small inferior marginal necrosis in the lower lip, the rest of the flap survived with good quality of the skin in both texture and color, with self-delimitation of the different esthetics units of the center of the face such as the nasogenian folds, nostrils, and upper lip filtrum, without the need of additional thinning surgical procedures. From all of the above, the arterialized venous free flap is an alternative reconstructive option for the treatment of burn sequels especially those that include the centrofacial region. © 2008 Wiley-Liss, Inc. Microsurgery, 2008. [source] Effect of the two-wall-stitch mistake upon patency of rat femoral vein anastomosis: Preliminary observationsMICROSURGERY, Issue 4 2004Marco Pignatti M.D. Anastomotic patency is believed to be the most important factor in microvascular surgery. The two-wall stitch is a technical error commonly considered to cause thrombosis of the anastomosis, especially on the venous side. In order to demonstrate the real effect on vein patency of the two-wall stitch, the authors performed a standardized mistake after correct microanastomosis on the femoral vein of 15 rats, with one stitch passing through the whole thickness of the two walls of the vein. Traditional correct anastomoses on the contralateral side were used as controls. Patency was assessed at 5, 20, and 60 min and at 24 h by the milking test, and by direct section of the vessel at 24 h. The results showed no statistically significant difference between the two techniques. Histological examination confirmed the clinical judgment about the vessel's patency, and ultrastructural microscopy evidenced only mild signs of endothelial activation. In conclusion, this study indicates that the occasional two-wall stitch does not necessarily increase the risk of venous occlusion in anastomoses of the rat femoral vein. © 2004 Wiley-Liss, Inc. [source] Combined cuff and suture technique for orthotopic whole intestinal transplantation in ratsMICROSURGERY, Issue 3 2002Atsunori Nakao M.D. For the purpose of immunological study on small intestinal transplantation (SIT), rat SIT models using direct suture technique widely have been used, which requires at least several months of training for microsurgery. Alternatively, a simple cuff technique for SIT has been mainly used by us, which reduces warm-ischemic time and the training period, but the entire intestinal grafts usually obtain a limited blood supply. This report describes a modification of a combined cuff and suture technique for rat SIT to aid beginning microsurgical transplantation researchers. The advantages are 1) use of only arterial suturing, making it easier for beginners, with the cuff technique applied to the more difficult vein anastomosis; 2) achievement of better arterial inflow and graft survival than when the arterial cuff technique is used; and 3) doing only partial clamping of the aorta, which improves animal survival and success of the procedure. A very high successful rate in orthotopic whole SIT was achieved even by beginners. © 2002 Wiley-Liss, Inc. MICROSURGERY 22:85,90 2002 [source] Hepatic venous outflow reconstruction in adult living donor liver transplants without portal hypertensionCLINICAL TRANSPLANTATION, Issue 2 2004Diego Bogetti Abstract:, Graft congestion is one of the causes of poor graft function in segmental liver transplantation. Three factors are implicated in segmental graft congestion: graft size, hepatic venous outflow and portal inflow. The graft size must be matched to the body weight, which is conventionally done by using graft to body weight ratio. Hepatic blood outflow must be optimized by hepatic vein reconstruction, which can be complicated. High portal blood flow has been shown to be detrimental to small-for-size grafts. These factors are strictly connected to each other. They can all contribute to graft congestion and poor function, while one factor can compensate for the others and decrease congestion. Ideally, all the accessory veins should be reconstructed, if possible, to maximize the outflow. In the absence of portal hypertension and with an adequate sized graft, complex venous reconstruction may not be necessary. We present a case report of an adult living donor liver transplant with the favorable conditions of normal portal pressure and a large sized graft, but complicated by the presence of several accessory hepatic veins. A simple hepatic vein anastomosis was sufficient for adequate outflow and prompt graft function. [source] | ||||||||||