Surgical fastening apparatus with locking mechanism
First Claim
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1. A surgical fastener applying apparatus which comprises:
- a) a cartridge for holding a plurality of surgical fasteners;
b) means responsive to application of a fastener driving force for substantially simultaneously ejecting surgical fasteners from said cartridge;
c) approximation blocking means for blocking approximation of said cartridge from a proximal position to a distal position; and
d) a locking member supported within said cartridge, said locking member mounted for movement in response to application of said fastener driving force into engagement with said approximation blocking means only after fastener driving force into engagement with said approximation blocking means only after said surgical fasteners have been ejected from said cartridge to prevent reapproximation of the cartridge, said locking member including a generally cylindrical shaft portion.
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Abstract
An improved apparatus for applying surgical fasteners to body tissue includes a cartridge containing a plurality of fasteners, an anvil positioned opposite the cartridge, and a locking mechanism to prevent re-approximation of the cartridge towards the anvil after the fasteners are fired and the cartridge is withdrawn from the anvil.
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Citations
28 Claims
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1. A surgical fastener applying apparatus which comprises:
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a) a cartridge for holding a plurality of surgical fasteners; b) means responsive to application of a fastener driving force for substantially simultaneously ejecting surgical fasteners from said cartridge; c) approximation blocking means for blocking approximation of said cartridge from a proximal position to a distal position; and d) a locking member supported within said cartridge, said locking member mounted for movement in response to application of said fastener driving force into engagement with said approximation blocking means only after fastener driving force into engagement with said approximation blocking means only after said surgical fasteners have been ejected from said cartridge to prevent reapproximation of the cartridge, said locking member including a generally cylindrical shaft portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A surgical stapler comprising:
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an anvil frame elongate in a longitudinal direction and including anvil surfaces in a plane generally perpendicular to the longitudinal direction; a cartridge assembly movable relative to the anvil frame between an open position with the cartridge assembly spaced from the anvil surfaces and a closed position with the cartridge assembly and the anvil surfaces in closely spaced relationship, said cartridge assembly including a cartridge housing containing a plurality of staples disposed in at least one row positioned in opposition to the anvil surfaces, and a pusher plate for pressing the staples within the cartridge housing against the anvil surfaces to engage and close the staples in tissue between the cartridge housing and the anvil surfaces, said pusher plate being movable relative to the cartridge housing between pre-fired and fired positions; and means for preventing the cartridge assembly from moving from the open to the closed position when the stapler is loaded with a cartridge housing having a pusher plate in a fired position, said means for preventing said cartridge assembly from moving from said open to said closed positions including a first retention aperture and a second safety aperture opening into the surface of the anvil frame for engagement with a locking pin, said locking pin supported within said cartridge assembly and mounted for movement between a first position engaged with said first retention aperture to afford free movement of the cartridge assembly between the open and closed positions, and a second blocking position engaged with said second safety aperture to prevent movement of the cartridge assembly from said open to said closed position, and a biasing mechanism for urging the locking pin toward the blocking position. - View Dependent Claims (28)
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Specification