Patent ID: 8241227

Claim:
A biopsy tissue sampling treatment instrument comprising: a tissue sampling unit having a predetermined length sufficient to puncture living tissue, the tissue sampling unit comprising: a puncturing portion formed at a distal end of the tissue sampling unit, the puncturing portion comprising: a protruding surface portion expanding in a rearward direction along a puncture direction of the tissue sampling unit; and a first tissue holding surface, provided on a rear side of the protruding surface portion, having an area large enough to hold the living tissue; a stopper member provided at a rear end of the tissue sampling unit so as to be separated from a first conical surface formed at a rear end of the puncturing portion by a distance corresponding to a depth at which the living tissue is extracted, the stopper member comprising an abutting portion capable of abutting against the living tissue when the tissue sampling unit punctures the living tissue; a stem portion connecting the puncturing portion and the stopper member; and a protruding portion having a conical thin blade shape and provided at the stem portion and between the first tissue holding surface and the abutting portion, the protruding portion extending in a diameter direction of the stem portion and including a second tissue holding surface which is a second conical surface formed toward the rearward direction, the second tissue holding surface having an area large enough to hold the living tissue; and an operating member provided on the stopper member and configured to hold the tissue sampling unit when the tissue sampling unit punctures the living tissue, wherein tissue fragments of the living tissue which are scraped off by the first tissue holding surface and the second tissue holding surface are collected by being held by the first tissue holding surface and the second tissue holding surface and the abutting portion.