Anvil buttress attachment for surgical stapling apparatus

1. An anvil buttress loading system comprising:

an anvil assembly including an anvil plate and an anvil tip, the anvil plate having a tissue facing surface defining a central longitudinal slot and a plurality of staple forming pockets therein, a proximal end portion of the tissue facing surface including a hook assembly, the hook assembly including a pair of hooks disposed on opposed sides of the central longitudinal slot, each hook of the pair of hooks including an arm having a first end anchored to the tissue facing surface and a second end including a finger extending therefrom, a terminal end of the finger is biased against the tissue facing surface and movable relative to the tissue facing surface;

an anvil buttress loading tool including a carrier defining a cavity therein, the carrier having a support surface, a proximal end portion of the carrier including a pair of proximal protrusions and a distal end portion of the carrier including a distal protrusion; and

an anvil buttress including a body, a pair of proximal tabs extending proximally from the body, and a distal tab extending distally from the body,

wherein:

the body of the anvil buttress is positionable on the support surface of the anvil buttress loading tool with the pair of proximal tabs engaged with the pair of proximal protrusions and the distal tab engaged with the distal protrusion to retain the anvil buttress on the anvil buttress loading unit;

the body of the anvil buttress is positionable on the tissue facing surface of the anvil assembly with a proximal end portion of the body engaged with the hook assembly and a distal end portion engaged with the anvil tip to retain the anvil buttress on the anvil assembly; and

the anvil buttress is transferrable from the anvil buttress loading tool to the anvil assembly.

2. The anvil buttress loading system according to claim 1 , wherein the first end of the arm is anchored to the tissue facing surface at a proximal end thereof and the second end is disposed distal thereto.

3. The anvil buttress loading system according to claim 1 , wherein the anvil buttress has a proximal window defined in the proximal end portion of the body, the proximal window configured to receive the fingers of the pair of hooks therethrough.

4. The anvil buttress loading system according to claim 1 , wherein the anvil buttress includes a distal window defined through a distal end portion of the anvil buttress, the distal window configured to receive the anvil tip therethrough.

5. The anvil buttress loading system according to claim 1 , wherein the carrier of the anvil buttress loading tool includes longitudinal rails extending from opposed sides of the support surface, the anvil assembly positionable between the longitudinal rails with the tissue facing surface adjacent to the support surface.

6. The anvil buttress loading system according to claim 5 , wherein the carrier of the anvil buttress loading tool includes a transverse rail extending across distal ends of the longitudinal rails and over the support surface defining a distal opening into the cavity.

7. The anvil buttress loading system according to claim 1 , wherein the finger of each of the pair of hooks is curved relative to the arm.

8. The anvil buttress loading system according to claim 1 , wherein the anvil buttress loading tool includes a handle secured to the carrier.

9. The anvil buttress loading system according to claim 1 , wherein each proximal tab of the pair of proximal tabs of the anvil buttress defines an opening therethrough, and the distal tab of the anvil buttress defines an opening therethrough.

10. An anvil buttress loading assembly comprising:

an anvil buttress loading tool including a carrier defining a cavity therein, the carrier having a support surface, longitudinal rails extending from opposed sides of the support surface, and a transverse rail extending across distal ends of the longitudinal rails and over the support surface defining a distal opening into the cavity, a proximal end portion of the carrier including a pair of proximal protrusions and a distal end portion of the carrier including a distal protrusion; and

an anvil buttress including a body, a pair of proximal tabs extending proximally from the body, and a distal tab extending distally from the body,

wherein the body of the anvil buttress is positioned on the support surface, the pair of proximal tabs engaged with the pair of proximal protrusions, and wherein the distal tab is engaged with the distal protrusion.

11. The anvil buttress loading assembly according to claim 10 , wherein a plurality of axially spaced and opposed tabs extend from the longitudinal rails and over the support surface.

12. The anvil buttress loading assembly according to claim 10 , wherein the distal protrusion extends from the transverse rail.

13. The anvil buttress loading assembly according to claim 10 , wherein the anvil buttress includes a distal window defined through a distal end portion of the body, the distal window aligned with the distal opening of the carrier.

14. The anvil buttress loading assembly according to claim 10 , wherein the anvil buttress loading tool includes a handle secured to the carrier.

15. The anvil buttress loading assembly according to claim 10 , wherein each proximal tab of the pair of proximal tabs of the anvil buttress defines an opening therethrough, and the distal tab of the anvil buttress defines an opening therethrough.

16. A loading unit comprising:

a staple cartridge assembly;

an anvil assembly including an anvil plate and an anvil tip, the anvil plate having a tissue facing surface defining a central longitudinal slot and a plurality of staple forming pockets therein, a proximal end portion of the tissue facing surface including a hook assembly, the hook assembly including a pair of hooks disposed on opposed sides of the central longitudinal slot, each hook of the pair of hooks including an arm having a first end anchored to the tissue facing surface and a second end including a finger extending therefrom, a terminal end of the finger is biased against the tissue facing surface and movable relative to the tissue facing surface; and

an anvil buttress including a body having a proximal end portion releasably coupled to the anvil assembly by the hook assembly.

17. The loading unit according to claim 16 , wherein the first end of the arm is anchored to the tissue facing surface at a proximal end thereof and the second end is disposed distal thereto.

18. The loading unit according to claim 16 , wherein the anvil buttress has a proximal window defined in the proximal end portion of the body, the fingers of the pair of hooks extending through the proximal window and positioned against the tissue facing surface.

19. The loading unit according to claim 16 , wherein the anvil buttress includes a distal window defined through a distal end portion of the body, the distal end portion of the anvil buttress coupled to the anvil assembly by engagement of the distal window around the anvil tip.

20. The loading unit according to claim 16 , wherein the finger of each of the pair of hooks is curved relative to the arm.