Circular surgical stapler with mating anvil and shell assembly
First Claim
Patent Images
1. A surgical fastener applying apparatus comprising:
- an elongated body portion having proximal and distal ends; and
a head portion disposed adjacent the distal end of the elongated body portion, the head portion comprising;
a shell assembly defining a central aperture and including an annular tissue contacting surface with a plurality of slots formed therein through which a plurality of surgical fasteners are ejected during firing of the surgical apparatus, the plurality of slots arranged in an annular configuration, the tissue contacting surface having an opening formed therein spaced radially from the plurality of slots and spaced radially from the central aperture; and
an anvil assembly movable in relation to the shell assembly, the anvil assembly including an annular tissue contacting surface, and a projection extending proximally therefrom, the projection in alignment with the opening formed in the tissue contacting surface of the shell assembly, the projection being configured and dimensioned for positioning within the opening formed in the tissue contacting surface of the shell assembly.
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Accused Products
Abstract
A surgical stapler comprising a handle assembly, an elongated body portion extending distally from the handle assembly, and a head portion disposed adjacent a distal portion of the elongated body portion and including an anvil assembly and a shell assembly. The anvil assembly is movable in relation to the shell assembly between spaced and approximated positions. The anvil assembly has an anvil head and a plurality of projections extending proximally of the anvil head, the projections engageable with a portion of the shell assembly.
619 Citations
16 Claims
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1. A surgical fastener applying apparatus comprising:
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an elongated body portion having proximal and distal ends; and a head portion disposed adjacent the distal end of the elongated body portion, the head portion comprising; a shell assembly defining a central aperture and including an annular tissue contacting surface with a plurality of slots formed therein through which a plurality of surgical fasteners are ejected during firing of the surgical apparatus, the plurality of slots arranged in an annular configuration, the tissue contacting surface having an opening formed therein spaced radially from the plurality of slots and spaced radially from the central aperture; and an anvil assembly movable in relation to the shell assembly, the anvil assembly including an annular tissue contacting surface, and a projection extending proximally therefrom, the projection in alignment with the opening formed in the tissue contacting surface of the shell assembly, the projection being configured and dimensioned for positioning within the opening formed in the tissue contacting surface of the shell assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of performing a surgical procedure comprising:
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inserting an anvil assembly of a surgical fastener applying apparatus into an opening in a patient; connecting the anvil assembly to a shell assembly of the surgical apparatus; approximating the anvil assembly and the shell assembly such that a projection extending proximally from an annular tissue contacting surface of the anvil assembly is inserted into a corresponding opening formed in an annular tissue contacting surface of the shell assembly in alignment with the projection, wherein the opening is spaced radially inward from a plurality of slots formed in the tissue contacting surface of the shell assembly and spaced radially outward from a central aperture of the shell assembly; and firing the surgical apparatus to eject a plurality of surgical fasteners through the plurality of slots formed in the tissue contacting surface of the shell assembly, and into tissue positioned between the anvil assembly and the shell assembly. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification