Tissue thickness compensators for circular surgical staplers

A tissue thickness compensator for use with a circular surgical stapler that comprises a staple cartridge and an anvil, the tissue thickness compensator comprising:

• a compressible body portion comprising an annular perimeter;
• and
• an attachment member coupled to the compressible body portion and configured for attachment to the anvil to retain the compressible body portion between the staple cartridge and the anvil, wherein the attachment member comprises a cushion extending at least partially around the annular perimeter of the compressible body portion.

A tissue thickness compensator for use with a circular surgical stapler including a staple cartridge with a cartridge deck and an anvil movably supported relative to the staple cartridge such that a staple forming surface of the anvil is in confronting relationship relative to the cartridge deck and a tissue cutting member axially advanceable out of the staple cartridge toward the anvil, the tissue thickness compensator comprising:

• a compressible, bioabsorbable annular body member configured to be supported between the staple forming surface and the cartridge deck;
• and
• an attachment member coupled to the compressible body member and configured for attachment to the anvil to retain the compressible body member between the staple forming surface and the cartridge deck, wherein the attachment member comprises a hood extending over a distal end of the anvil and attached to the compressible body member such that the compressible body member is retained adjacent to the staple forming surface, wherein the hood is movably attached to the anvil, and wherein the compressible body portion includes at least one side wall and wherein the hood is movable from a neutral position wherein the hood covers the at least one side wall to a deployed position wherein the at least one side wall is uncovered.

A tissue thickness compensator for use with a circular surgical stapler including a staple cartridge with a cartridge deck and an anvil movably supported relative to the staple cartridge such that a staple forming surface of the anvil is in confronting relationship relative to the cartridge deck and a tissue cutting member axially advanceable out of the staple cartridge toward the anvil, the tissue thickness compensator comprising:

• a compressible, bioabsorbable annular body member configured to be supported between the staple forming surface and the cartridge deck;
• and
• an attachment member coupled to the compressible body member and configured for attachment to the anvil to retain the compressible body member between the staple forming surface and the cartridge deck, wherein the attachment member comprises a deformable bead attached to the compressible body member.