An endoscopic tissue collecting instrument is provided, which can collect a large tissue specimen by cutting the tissue positively with a blade of an outer sheath. The blade formed at the distal end of the outer sheath is directed oblique to the circumferential direction of the outer sheath. ...http://www.google.com/patents/US20010005778?utm_source=gb-gplus-sharePatent US20010005778 - Endoscopic tissue collecting instrument
