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US 2020/0345364 A1Published application
Surgical stapler with self-adjusting staple height
AssigneeApplied Medical Resources Corporation
InventorsMatthew M. Becerra, Steven E. Decker, Timothy M. Hopkins, Atal C. Patel, Babak D. Jasemian
Life of this patent
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Abstract
A surgical stapler is provided that includes a spring loaded lift that automatically adjusts a staple cartridge and/or staple formation between a range of sizes. The lift is automatically released as the staple firing mechanism begins its forward translation of the firing sequence. The automatic one-way adjustment also adjusts the staple cartridge while maintaining the cartridge parallel to the anvil to provide consistent staple formations.
Claims18
A surgical stapler comprising:
- a first jaw including an anvil;
- a second jaw including a cartridge including a plurality of staples and a corresponding set of staple pushers situated in a plurality of staple pockets, the staple pushers being actuatable to eject the staples from the staple pockets through interaction with a set of fins on a slider moving longitudinally within the cartridge, the first jaw movable towards and away from the second jaw;
- a rampway fixed within the second jaw, the rampway comprising a plurality of ramps located thereon;
- and
- a cartridge lift positioned between the cartridge and the rampway, the cartridge lift having a generally flat upper surface for seating of the cartridge thereon and a bottom surface comprising a plurality of ramps thereon that correspondingly mate with the ramps of the rampway to move the cartridge vertically within the second jaw towards the anvil upon longitudinal movement of the cartridge lift.
2 more elements
A surgical stapler comprising:
- a first jaw including an anvil;
- a second jaw including a cartridge including a plurality of staples and a corresponding set of staple pushers situated in a plurality of staple pockets, the staple pushers being actuatable to eject the staples from the staple pockets through interaction with a set of fins on a slider moving longitudinally within the cartridge, the first jaw movable towards and away from the second jaw;
- a cartridge lift positioned between the cartridge and the second jaw, the cartridge lift having a generally flat upper surface for seating of the cartridge thereon to move the cartridge vertically within the second jaw towards the anvil upon longitudinal movement of the cartridge lift,
- a cartridge lift spring biasing the cartridge lift in a proximal direction,
- an elongate shaft extending from a proximal end to a distal end, wherein the first jaw and the second jaw are positioned at the distal end of the elongate shaft, and wherein the lift spring is disposed within the elongate shaft.
2 more elements
A surgical stapler comprising:
- a first jaw including an anvil;
- a second jaw including a cartridge including a plurality of staples and a corresponding set of staple pushers situated in a plurality of staple pockets, the staple pushers being actuatable to eject the staples from the staple pockets through interaction with a set of fins on a slider moving longitudinally within the cartridge, the first jaw movable towards and away from the second jaw;
- a cartridge lift extending along a first side of the cartridge between the cartridge and the second jaw, the cartridge lift comprising a plurality of slots formed therein, wherein the cartridge comprises a plurality of protrusions extending into engagement with the plurality of slots to move the cartridge vertically within the second jaw towards the anvil upon longitudinal movement of the cartridge lift.
Dependencies are inferred from the claim text.