US Patent 9161757 Hub for positioning annular structure on a surgical device

An apparatus for forming an anastomosis between adjacent intestinal sections is provided. The apparatus includes an anastomosis device having a cartridge assembly; and an anvil assembly having a shaft extending therefrom and a connection feature on the shaft. The apparatus further including a hub having a connection portion selectively attachable to the connection feature of the shaft, the connection portion defining a lumen for receiving the shaft; and an annular structure operatively connected to the hub and extending radially outwardly therefrom, the hub being arranged for locating the annular structure between the adjacent intestinal sections when connected to the shaft.