Surgical Fastening Apparatus
A surgical fastening apparatus including a fastener receiving frame including a plurality of spaced apart openings formed therein and a fastener supporting member containing a plurality of surgical fasteners extending therefrom. The surgical fasteners are engagable with the plurality of openings to mate with the fastener receiving frame to fasten tissue therebetween. The fasteners are engageable with the openings in a plurality of positions dependent on a tissue thickness between the fastener receiving frame and the fastener supporting member.
1. A surgical fastening assembly comprising:
a fastener receiving frame having a first annular portion and a second annular portion, the first annular portion defining a plurality of openings and the second annular portion defining a plurality of perforations, and a locking structure supported within each of the plurality of openings;
a fastener supporting member including a plurality of surgical fasteners, each of the surgical fasteners including at least one projecting surface which is independently engageable with the locking structure supported within a respective one of the plurality of openings to fasten the fastener receiving frame in relation to the fastener supporting member;
a pusher for advancing the fastener supporting member into engagement with the fastener receiving frame; and
an annular blade advanceable by the pusher to sever tissue, the annular blade defining a thickness, the plurality of perforations each defining a diameter, wherein the thickness of the annular blade is less than the diameter of each of the plurality of perforations,
wherein the first and second annular portions are concentric and the plurality of perforations facilitate separation of the first annular portion from the second annular portion.
2. The surgical fastening assembly of claim 1 , wherein the second annular portion is positioned radially inwardly of the first annular portion.
3. The surgical fastening assembly of claim 1 , wherein the first annular portion and the second annular portion include different materials.
4. The surgical fastening assembly of claim 1 , wherein the first annular portion and the second annular portion are made of biodegradable polymers.
5. The surgical fastening assembly of claim 1 , wherein the at least one projecting surface includes a plurality of projecting surfaces, each of the projecting surfaces being independently engageable with the locking structure supported within a respective one of the plurality of openings to fasten the fastener receiving frame in relation to the fastener supporting member in a plurality of positions dependent on a thickness of tissue to be fastened.
6. The surgical fastening assembly of claim 5 , wherein the plurality of projecting surfaces includes a series of locking tabs spaced along the fastener to mate with the locking structure of the fastener receiving frame within the respective opening at various positions to provide a variable depth of engagement.
7. The surgical fastening assembly of claim 5 , wherein the locking structure includes a series of locking surfaces to engage the plurality of projecting surfaces of the respective fastener at various positions to provide a variable depth of engagement.
8. The surgical fastening assembly of claim 6 , wherein the locking tabs include a plurality of semi-circular ribs.
9. The surgical fastening assembly of claim 8 , wherein each of the fasteners includes a longitudinally extending slot formed therein.
10. The surgical fastening assembly of claim 6 , wherein the locking tabs include a plurality of projections angled to enable movement of the fastener in a first direction into the opening in the fastener receiving frame and prevent movement of the fastener in a second direction away from the opening.
11. The surgical fastening assembly of claim 5 , wherein the fasteners include a reservoir to receive a drug.
12. The surgical fastening assembly of claim 5 , wherein the fastener receiving frame has a planar outer surface.
13. The surgical fastening assembly of claim 5 , wherein each of the openings has a first depth and the respective fastener has a first length, the first length being less than the first depth.
14. The surgical fastening assembly of claim 1 , wherein the plurality of perforations are uniformly defined in the second annular portion.
15. The surgical fastening assembly of claim 1 , wherein the plurality of perforations are nonuniformly defined in the second annular portion.
16. The surgical fastening assembly of claim 1 , wherein the plurality of perforations define a ring of perforations.
17. The surgical fastening assembly of claim 1 , wherein the plurality of perforations define a plurality of rings of perforations.
18. The surgical fastening assembly of claim 1 , wherein each of the plurality of perforations includes a notch that extends along a direction parallel to the outer periphery of the second annular portion.
19. The surgical fastening assembly of claim 1 , wherein each of the plurality of perforations includes a slit having a pair of opposite ends.
20. The surgical fastening assembly of claim 19 , wherein each slit has a width which corresponds to the thickness of the annular blade.