TISSUE CUTTER AND MINIMALLY INVASIVE SURGICAL INSTRUMENT

The present invention discloses a tissue cutter. The tissue cutter comprises: a tissue cutting stent (1, 1', 1") and a first reefing thread (5). The tissue cutting stent (1, 1', 1") is expandable in a radial direction. The expanded tissue cutting stent (1, 1', 1") is loudspeaker-shaped gradually opening from a proximal end to a distal end, and a loudspeaker-shaped accommodating space is formed inside the expanded tissue cutting stent (1, 1', 1"). The tissue cutting stent (1, 1', 1") is provided with a plurality of first threading holes (50, 50' ) at the distal end, and the plurality of first threading holes (50, 50') is arranged along a circumferential direction of the tissue cutting stent (1, 1', 1"). The first reefing thread (5) passes through the plurality of first threading holes (50, 50' ). The first reefing thread (5) has opposite first and second ends. The first end is secured to a starting threading hole in the plurality of first threading holes (50, 50' ). The tissue cutter is used to resect lesioned tissues with a minor incision and accurate resection area. Accordingly, the use of the tissue cutter to perform a minimally invasive surgery can preserve more normal tissues and organs, and resect the lesions in patient's body more minimally invasively and accurately.