Self-contained powered surgical apparatus

摘要

A powered surgical apparatus for applying surgical fasteners to body tissue comprising:
a) an elongate body (210) defining a longitudinal axis;
b) a channel (226) supported by said elongate body, the channel having a longitudinal slot (292);
c) a cartridge (228) retained by said channel, the cartridge housing a plurality of surgical fasteners;
d) an anvil member (232) pivotably mounted to the channel adjacent the cartridge, the anvil member and cartridge being relatively movable between an open position and a closed position, the anvil member having a longitudinal slot (294);
e) a motor assembly (212) having a rotatable drive shaft;
f) a power source (214) for energizing the motor assembly; and
g) an actuating assembly (240) driven by the motor assembly, the actuating assembly having an actuation sled (250) configured to translate through the cartridge to eject the surgical fasteners therefrom, the actuation sled being driven by an actuation beam (260), the actuation beam being accommodated by the longitudinal slot of the channel and the longitudinal slot of the anvil member; and
h) the actuation beam having a cam roller (284) for engaging the anvil member and a cam beam (288) for engaging the channel to effect the progressive closure of the anvil member and balance the forces exerted on the anvil member.