Self contained gas powered surgical apparatus

摘要

A self contained gas powered endoscopic surgical apparatus 50 is provided for placing lateral lines of surgical fasteners into body tissue. The apparatus includes an anvil member 56 and a surgical fastener cartridge member 60mounted to the distal end of an elongated endoscopic portion. A tubular collar 222 of the endoscopic portion moves distally to engage the anvil member and bias the anvil member and the cartridge member into cooperative alignment, thereby clamping body tissue to be fastened between the anvil member and the cartridge member. A self contained pneumatic system 68 is disposed in the surgical apparatus and is actuable to eject and/or form the surgical fasteners in the clamped body tissue. The apparatus further comprises a mechanism 400 for preventing the premature actuation of the pneumatic system during shipment of the instrument. A mechanism 602, 604 for frictionally engaging body tissue inserted between the anvil member and the cartridge is also provided. In addition, a mechanism 516, 552 for inhibiting external exposure of a tissue cutting structure is provided.