Surgical staples and end effectors for deploying the same
An end effector includes an anvil and a cartridge assembly having a plurality of surgical staples disposed in a cavity defined therein. The cartridge assembly may include a movable driver or sled configured to deploy the surgical staple from the cavity into tissue. The surgical staple may include a linear leg and an arcuate leg extending therefrom. The linear leg may include a protruding portion to provide pressure to tissue captured by the surgical staple. A three-dimensional and/or self-supporting surgical staple may interlock its two legs upon deployment thereof.
1. An end effector for a surgical stapler, comprising:
an anvil having a staple forming surface; and
a cartridge assembly configured to support a surgical staple therein and being movably coupled to the anvil between unapproximated and approximated positions, the cartridge assembly including:
a driver configured to rotate the staple into engagement with the staple forming surface of the anvil to deform the staple; and
a pusher bar rotatably coupled to an inner surface of the cartridge assembly, the driver configured for cooperative engagement with the pusher bar.
2. The end effector according to claim 1 , wherein the pusher bar has a planar portion in abutment with a backspan of the staple.
3. The end effector according to claim 2 , wherein the pusher bar is rotatable between a starting position, in which the staple is disposed within the cartridge assembly, and a finished position, in which a leg of the staple is disposed in engagement with the staple forming surface of the anvil.
4. The end effector according to claim 3 , wherein the driver is movable along an axis to rotate the pusher bar between the starting and finished positions.
5. The end effector according to claim 2 , wherein the pusher bar has a raised portion disposed adjacent the planar portion, the backspan of the surgical staple being releasably secured between the raised portion of the pusher bar, the planar portion of the pusher bar, and the inner surface of the cartridge assembly.
6. The end effector according to claim 1 , wherein the inner surface of the cartridge assembly includes a curved portion configured for receipt of a leg of the staple such that the leg of the staple is movable relative to and along the curved portion of the inner surface.
7. The end effector according to claim 1 , wherein the staple has a V-shaped configuration.
8. The end effector according to claim 7 , wherein the staple includes:
a backspan; and
a leg extending from the backspan, the staple having a D-shaped configuration upon deformation thereof by the staple forming surface of the anvil.
9. The end effector according to claim 8 , wherein the leg has an arcuate configuration prior to deformation thereof.
10. The end effector according to claim 8 , wherein the backspan has a bump.
11. The end effector according to claim 10 , wherein the bump is disposed between first and second linear portions of the backspan.
12. The end effector according to claim 10 , wherein the bump extends from an end of the backspan, the leg having an end that overlaps the bump of the backspan upon deformation of the leg.
13. The end effector according to claim 8 , wherein the leg has a first end and a second end, the first end having a greater thickness than a thickness of the second end.
14. An end effector for a surgical stapler, comprising:
an anvil having a staple forming surface; and
a cartridge assembly configured to support a surgical staple therein and being movably coupled to the anvil between unapproximated and approximated positions, the cartridge assembly including a pusher bar rotatably coupled to an inner surface of the cartridge assembly, wherein rotation of the pusher bar relative to the inner surface of the cartridge assembly rotates the staple into engagement with the staple forming surface of the anvil to deform the staple.
15. The end effector according to claim 14 , further comprising a driver movable along an axis to rotate the pusher bar.
16. The end effector according to claim 15 , wherein the driver has a tapered, upper surface in engagement with the staple.
17. The end effector according to claim 15 , wherein the staple includes:
a backspan; and
a leg extending from the backspan, at least a portion of the backspan being laterally offset from the leg.
18. The end effector according to claim 17 , wherein the backspan includes:
a main body having a first end extending from the leg and a second end; and
an extension extending from the second end of the main body, the leg and the extension being coplanar with one another and the main body being laterally offset from the leg and the extension.
19. The end effector according to claim 17 , wherein the backspan includes:
a main body having a first end extending from the leg and a second end;
an extension extending from the second end of the main body and at least partially laterally offset from the main body and the leg such that the extension and an end of the leg are in a side-by-side orientation upon deformation of the leg; and
a lateral extension connected to the first end of the main body.