A surgical stapling instrument for performing a circular anastomosis stapling operation is provided. The surgical instrument includes a stapling head assembly mounted by a flexible support shaft to an actuator handle assembly. The support shaft is capable of bending in any radial direction relative to...http://www.google.se/patents/US5632433?utm_source=gb-gplus-sharePatent US5632433 - Surgical anastomosis stapling instrument with flexible support shaft and anvil adjusting mechanism
