A surgical instrument for one-handed preparation of an anastomosis in minimally invasive surgery has, from the distal end to the proximal end, an interchangeable insertion head (1), a staple holder (30) with U-shaped staples and with a circular groove with thread placed in it, an ejector unit,...http://www.google.com/patents/US5669918?utm_source=gb-gplus-sharePatent US5669918 - Surgical instrument for preparing an anastomosis in minimally invasive surgery 
