US Patent 7080769 Luminal anastomotic device

An end to end anastomotic stapling device connects two lumen sections avoiding constriction at the anastomotic ring. An intraluminal end to end anastomotic stapler includes an expanding head and anvil designed to fire an anastomotic ring having an inner diameter at least equal to the nominal inner diameter of the remaining lumen sections. An extraluminal end to end lumen stapler is described attaching the lumen sections with an exterior flange type connection having anastomotic rings with a diameter larger than the inner diameter of the lumen sections whereby the anastomotic site has a diameter at least as great as the adjacent lumen sections.