Stapler for performing laparoscopic gastric sleeve procedures

A stapler for performing laparoscopic gastric sleeve procedures, comprising:

• a handle assembly having a distal end;
• a shaft extending distally from the distal end of the handle assembly, the shaft having a distal end;
• an end effector mounted on the distal end of the shaft, the end effector having a lower jaw and an upper jaw, the lower jaw being adapted for supporting a staple cartridge and the upper jaw having an anvil surface facing the lower jaw, at least one of the lower and upper jaws having a convexly curved proximal end at the distal end of the shaft;
• means for selectively opening and closing the upper and lower jaws with respect to one another;
• and
• means for selectively deploying staples from the staple cartridge, wherein the end effector is rotatable with respect to the shaft such that the end effector is rotatable in a direction which is perpendicular to a longitudinal axis of said shaft, and wherein the longitudinal axis of said shaft is defined as an axis commencing at said distal end of said handle assembly and traversing the length of said shaft and terminating at said distal end of said shaft.