Patent ID: 6656132
Filing Date: 2003-12-02
Classification: A61B

Abstract:
An endoscopic tissue collecting instrument comprising:an outer sheath including: an annular blade portion formed on an outer periphery of a distal end of the outer sheath and directed forwardly; and a tissue retaining recess formed in a lateral side of an area close to the blade portion; and an inner needle that is fitted into the outer sheath and capable of moving back and forth along a longitudinal axis, the inner needle including: a cutting blade, formed on an entire inner circumference at a distal end of the inner needle, for cutting off tissue entering the tissue retaining recess; and a needle tip formed at the distal end of the inner needle, and pointed forward, said needle tip being continuous with said cutting blade, wherein: the inner needle configured to be manipulated from an operator end to move back and forth between two positions, one being a position where the distal end of the inner needle is drawn into the outer sheath such that the inner needle does not close the tissue retaining recess and the other being a position where the inner needle protrudes from the distal end of the outer sheath.