SURGICAL FASTENER APPLYING APPARATUS

摘要

A surgical apparatus for applying staples or fasteners to tissue to form a circular anastomosis having an adjustable closure mechanism to rapidly approximate the distance between the anvil member and the fastener assembly of the instrument. The adjustable closure mechanism provides for rapid approximation during an initial movement and for fine adjustment of the distance between the anvil member and the fastener assembly upon subsequent movement of the closure mechanism. The closure mechanism consists of an advancing means which operates in a two stage advancement, such that initial movement of the advancing means moves the anvil member a greater distance than a subsequent movement of the advancing means.