1. Instrumentation for carrying out a gastrointestinal bypass comprising: means (4, 6, 12) for creating a gastric sleeve (21, 22) from the lesser curvature (13) of the stomach (1), means for creating a gastrointestinal bypass involving said gastric sleeve (21, 22), in which said means for creating a gastrointestinal bypass include: means for creating a gastroenteroanastomosis (26) between two closely approximated gastric and intestinal tissue portions, maintaining the continuity of the intestinal duct after the creation of the gastroenteroanastomosis, means for creating an enteroenteroanastomosis (29) between two closely approximated tissue portions (27, 28) of the intestine, maintaining the continuity of the intestinal duct after the creation of the enteroenteroanastomosis (29), means for sectioning the intestine (20) between the gastroenteroanastomosis (26) and the enteroenteroanastomosis (29).胃腸バイパスを実行するための器具類であって、-胃(1)の小弯(13)から胃スリーブ(21、22)を形成するための手段(4、6、12)と、-前記胃スリーブ(21、22)を含む胃腸バイパスを形成するための手段と、を備え、前記胃腸バイパスを形成するための手段が、-2つの緊密に接近させた胃組織部分と腸組織部分との間で胃腸吻合部(26)を形成し、胃腸吻合部の形成後に腸管の連続性を維持するための手段と、-腸の2つの緊密に接近させた組織部分(27、28)の間で腸腸吻合部(29)を形成し、腸腸吻合部(29)の形成後に腸管の連続性を維持するための手段と、-胃腸吻合部(26)と腸腸吻合部(29)との間で腸(20)を切断するための手段と、を含む、器具類。
