Senmed, Inc.

Hugh Melling

Hector Chow

Denise S Schieltz

Federico Bilotti

Robert G Rothfuss

Earl J Mills

David K Kuhl

A surgical stapling instrument suitable for performing a gastrointestinal anastomosis is provided. The stapling instrument incorporates a jaw clamping mechanism which applies clamping forces to its jaw members to resist the forces exerted on the anvil and staple cartridge carrying portions of the jaw members when the staples are formed. Preferably, the stapling instrument includes a pair of elongate jaw members, one of which supports a staple cartridge adapted to receive at least two laterally spaced longitudinal rows of staples, and the other provided with an anvil adapted to form the staples. A pusher bar and knife blade assembly is slidable longitudinally relative to the jaw members to sequentially drive the staples from the cartridge and form the staples against the anvil to produce a pair of laterally spaced rows in the tissue. The pusher bar and knife blade assembly includes a knife blade for cutting the tissue along a line between the longitudinal staple rows. A latching mechanism is provided for latching the jaw members together at an intermediate position therealong adjacent to the staple cartridge and the anvil. In addition, a cam mechanism is provided for urging the jaw members apart at a position remote from the latching mechanism to resist the forces exerted on the staple cartridge and anvil when the pusher bar and knife blade assembly is actuated to staple and cut the tissue gripped between the jaw members.

Surgical stapling instrument with jaw clamping mechanism

A surgical stapling instrument suitable for performing a gastrointestinal anastomosis. The stapling instrument includes a pair of elongate jaw members, one of which supports a staple cartridge adapted to receive at least two laterally spaced longitudinal rows of staples, and the other provided with an anvil adapted to form the staples. A pusher bar and knife blade assembly is slidable longitudinally relative to the jaw members to sequentially drive the staples from the cartridge and form the staples against the anvil to produce a pair of laterally spaced rows of formed staples in tissue gripped between the jaw members and to cut the tissue along a line between the staple rows. A latching mechanism is operable to a partially latched position in which the jaw members are loosely connected together to permit the staple cartridge and anvil to be adjusted in position on the tissue without disconnecting the jaw members from each other. A cam mechanism is provided for urging the jaw members apart at a position remote from the latching mechanism to resist the forces exerted on the staple cartridge and anvil when the pusher bar and knife blade assembly is actuated to staple and cut the tissue gripped between the jaw members. The cam mechanism is initially held in an inoperative position and subsequently held in an operative position when the pusher bar and knife assembly is actuated. Preferably, the staple cartridge is disposable.

Surgical stapling instrument with jaw latching mechanism and disposable

A disposable ligator for applying clamping clips to veins, arteries and blood vessels. The ligator comprises a first handle terminating at its forward end in a first jaw and a second jaw and a second handle, both pivotally mounted on the first handle near the forward end thereof. The handles are shiftable between open and closed positions and shift the jaws between open and closed clip-clamping positions. A clip tube containing a plurality of clips and a spring biased feeder shoe to constantly urge the clips forwardly therein is mounted in the first handle. A pusher is mounted in the first handle parallel to the clip tube in a pusher track which extends to the forward ends of the jaws. The pusher is shiftable by the first and second handles between a retracted position when the handles are closed and an extended position to locate a clip in the pusher track at the forward ends of the jaws when the handles are open. The first handle provides a ramp structure leading to the pusher track at the forward end of the clip tube which is covered by the pusher when in its extended position and exposed by the pusher when in its retracted position, thus enabling the forwardmost clip to be transferred to the pusher track in front of the pusher due to the forward urging of the clips in the clip tube, and without the necessity of moving transfer parts.

Ligator

A disposable linear surgical stapling instrument comprising a body with handle means and trigger means and, at its forward end, a fixed anvil-supporting jaw. A movable jaw comprising a staple cartridge is mounted on the body and is operatively connected to the handle means and trigger means. An adjustment bolt is slidably mounted in the body and is shiftable forwardly and rearwardly therein by an adjustment knob rotatively mounted at the rearward end of the body. The adjustment bolt, when shifted forwardly, shifts the handle means and trigger means forwardly and the movable jaw toward the fixed jaw, the staple cartridge approaching the anvil. A staple driver is connected to and shiftable by the trigger means to drive staples from the cartridge, through the tissue to be sutured and against the anvil over a range of distances between the anvil and the cartridge constituting the working gap of the instrument. The adjustment bolt also actuates indicator means to each side of the instrument indicating when the working gap has been achieved. An alignment pin is mounted on the body, extending through the cartridge, and is shiftable to an operative position extending into the fixed jaw. Safety means prevents rotation of the adjustment knob unless the alignment pin is in its operative position. Another safety means prevents actuation of the trigger means until the distance between the anvil and cartridge approaches the working gap. Additional means locks the trigger means after achieving its actuated position to give visual, tactile and audible indication that the staples have been formed and implanted.

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West Chester, OH, United States of America

Hugh Melling