A surgical staple for securing a purse string suture to human tissue comprises a staple body of deformable material formed into a loop through which the purse string suture is threaded. The staple body includes a pair of legs which are deformable into an overlapping configuration upon insertion into...http://www.google.co.uk/patents/US5573543?utm_source=gb-gplus-sharePatent US5573543 - Endoscopic surgical instrument and staples for applying purse string sutures
