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• W2000528310 abstract "In orthotopic liver transplantation the incidence of biliary complications is up to 49%. In view of the relative frequency of such complications despite seemingly good preconditions, method-related disadvantages of conventional suture must also be considered as a possible cause. These include perforating needle injury of the choledochal wall with at least temporary exposure of suture material in the lumen, suboptimal approximation of the mucosa, and an additional decrease in blood flow in the choledochal stumps as a result of suture-related tissue strangulation. Hence the search for alternative anastomosis techniques.To evaluate the surgical suitability of extramucosal titanium clips (Vascular Closure Staples; VCS) in comparison with conventional manual suture, a study was performed in 36 pigs, which were randomly assigned to 4 groups, each containing 9 animals. Choledochal excision was performed in 18 pigs and transection in the other 18 pigs; end-to-end anastomosis was then carried out, using a VCS stapler in half of the animals in each of these two groups and conventional manual suture in the other half. Pre- and postanastomotic blood flow was measured during the surgery with the aid of a laser Doppler flow meter. The long-term behavior of the closure techniques was ascertained by regular laboratory checks over the ensuing 6-month observation period, after which the pigs were killed so that the specimens could be harvested.Using medium-sized VCS clips, we were able to create a tension-free, everted biliary anastomosis with exact mucosal approximation and no narrowing of the lumen, and without any technical problems during the performance of the procedure. Measurements with the laser Doppler flow meter showed well-preserved anastomotic blood flow after clip reconstruction, with significantly higher perfusion values than after manual suture. The postoperative courses of the investigated laboratory parameters did not reveal any significant differences between the two methods. In contrast, histomorphometric evaluation showed wall thickness and thus fibrosis in the anastomosis region to be less in the clip group than in the suture group (median: 510 microm versus 660 microm, P<0.001). In the pigs in which clip anastomosis was used, there were no detectable anastomotic stenoses; in the pigs in which conventional suture was used, however, ultrasonography revealed five anastomoses with varying degrees of narrowing.Extramucosal VCS clip anastomosis not only offers potential advantages with respect to nonpenetrating and optimal mucosal contact, investigations in animals also show it to be superior to conventional manual suture as regards anastomotic blood flow and medium-term fibrosis formation. We believe that our data and the available literature warrant a clinical evaluation of this technique in appropriate studies." @default.
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• W2000528310 date "2002-01-01" @default.
• W2000528310 modified "2023-10-13" @default.
• W2000528310 title "VASCULAR CLOSURE STAPLES-A NEW TECHNIQUE FOR BILIARY RECONSTRUCTION:" @default.
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• W2000528310 doi "https://doi.org/10.1097/00007890-200201150-00006" @default.
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