A device for delivering a loop of suture material for use in endoscopic ligation is described. The device has a pair of coaxial slidable cylindrical tubes. The outer tube contains a hook for snaring the free end of the suture material; the inner tube contains a groove for retaining the suture loop circumferentially...http://www.google.com.hk/patents/US5873876?utm_source=gb-gplus-share專利 US5873876 - Surgical loop delivery device and method
