Patent ID: 8529531

Claim:
A medical tissue extraction instrument comprising a tissue extraction controller to control pressure of at least one suction tube connected to a fine needle during extraction of tissue, wherein the tissue extraction controller includes a suction adjustor to set pressure applied to a suction tube, the suction adjustor including a pressure adjustor to adjust the pressure applied to the suction tube and a suction period adjustor to adjust a suction period at which the tissue is extracted into the suction tube, thereby enabling automatic extraction of the tissue into the suction tube at regular intervals, and wherein the tissue extraction controller further includes a suction pressure generator taking a form of a footboard and adapted to control a suction operation of the suction tube when being pushed downward, the suction pressure generator including two or more pressure boards, each including a continuous suction pressure board to perform successive suction operations of the suction tube according to the suction period and a discontinuous suction pressure board to perform intermittent suction operations of the suction tube.