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US 5,309,927 AGranted
Circular stapler tissue retention spring method
AssigneeEthicon, Inc.
InventorRobert F. Welch
Life of this patent
Estimating the term…
Abstract
An tissue retention spring for use with a surgical circular stapler used to perform an anastomosis. The tissue retention spring is mounted onto the anvil shaft of the stapler. The spring has a plurality of connected helical coils defining a member having an axial passage therethrough. The spring provides tissue retention, tissue and fluid venting, and improved stapler closing.
Claims13
A method of using a circular stapler having an anvil, an anvil shaft, a staple cartridge and an actuating means to connect sections of intestine, comprising:
- positioning a tissue retention spring onto anvil shaft, wherein the spring comprises:
- a plurality of connected helical coils members defining a spring member, the coils separated by spaces, said spring member having a proximal end and a distal end and an axial length, said spring member having an axial passageway therethrough for mounting onto the anvil shaft;
- inserting the anvil and cartridge into adjacent sections of an intestine;
- tying at least one section of the intestine to the spring so that the intestine extends into at least one of the spaces between the coils of the spring;
- and, actuating the actuating means to staple the sections of the intestine together.
2 more elements
A method of retaining tissue on a circular stapler having an anvil shaft, said method comprising:
- concentrically mounting a tissue retention spring on the anvil shaft, said tissue retention spring comprising a plurality of connected helical coils members defining a member, the coils separated by spaces, said member having a proximal end and a distal end and an axial length, said spring member having an axial passageway therethrough for mounting onto the anvil shaft;
- placing tissue about the spring;
- and,
- compressing the spring so that at least some of the tissue is engaged by the spring in the spaces between the coils.
1 more element
Dependencies are inferred from the claim text.