Circular stapling device including buttress material
First Claim
1. A circular anvil assembly for a stapling device, the anvil assembly comprising:
- an anvil head having a tissue engaging surface;
an anvil cap movable relative to the anvil head between an approximated position and an unapproximated position;
a crush ring supported on the anvil head and movable into engagement with the anvil cap to move the anvil cap to the unapproximated position;
an o-ring supported on the anvil cap; and
an anvil buttress member including a body portion and an extension portion that extends from the body portion, the extension portion being selectively releasable from between the o-ring and the anvil head to separate the body portion from the tissue engaging surface of the anvil head;
wherein the anvil cap defines a groove in a bottom surface of the anvil cap, the groove configured to support the o-ring therein.
1 Assignment
0 Petitions
Accused Products
Abstract
An anvil assembly includes a circular anvil head that supports a crush ring, an anvil cap that supports an o-ring, and a circular anvil buttress member. The cap connects to the head and is movable relative to the head between approximated and unapproximated positions. The crush ring is spaced from the cap when the cap is in the approximated position and movable into engagement with the cap to move the cap to the unapproximated position. The buttress member includes a body portion and an extension portion. The body portion is supported on the head and the extension portion is secureable between the o-ring and the head when the cap is in the approximated position. The extension portion is releasable from between the o-ring and the head when the cap is disposed in the unapproximated position so that the body portion separates from the head.
494 Citations
16 Claims
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1. A circular anvil assembly for a stapling device, the anvil assembly comprising:
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an anvil head having a tissue engaging surface; an anvil cap movable relative to the anvil head between an approximated position and an unapproximated position; a crush ring supported on the anvil head and movable into engagement with the anvil cap to move the anvil cap to the unapproximated position; an o-ring supported on the anvil cap; and an anvil buttress member including a body portion and an extension portion that extends from the body portion, the extension portion being selectively releasable from between the o-ring and the anvil head to separate the body portion from the tissue engaging surface of the anvil head;
wherein the anvil cap defines a groove in a bottom surface of the anvil cap, the groove configured to support the o-ring therein. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for releasing an anvil buttress member from an anvil assembly of a stapling device, wherein the anvil buttress member includes a body portion and an extension portion extending from the body portion, and wherein the extension portion of the anvil buttress member is secured between an o-ring of the anvil assembly and an anvil head of the anvil assembly, the method comprising:
moving an o-ring of the anvil assembly relative to an anvil head of the anvil assembly to release the anvil buttress member from the anvil assembly. - View Dependent Claims (8, 9)
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10. A stapling device, comprising:
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a handle assembly; an elongate body that extends from the handle assembly; and an end effector mounted on a distal end of the elongate body and including a cartridge assembly and an anvil assembly, the anvil assembly including; an anvil head having a tissue engaging surface; an anvil cap movable relative to the anvil head between an approximated position and an unapproximated position; a crush ring supported on the anvil head and movable into engagement with the anvil cap to move the anvil cap to the unapproximated position; an o-ring supported on the anvil cap; and an anvil buttress member including a body portion and an extension portion that extends from the body portion, the extension portion being selectively releasable from between the o-ring and the anvil head to separate the body portion from the tissue engaging surface of the anvil head. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification