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 defining a staple forming surface; and
a cartridge assembly movably coupled to the anvil between unapproximated and approximated positions, the cartridge assembly defining a longitudinal axis and a pocket extending at an angle relative to the longitudinal axis, the pocket being configured to support a staple therein, the cartridge assembly including a driver configured to move the staple into engagement with the staple forming surface of the anvil to deform the staple, wherein the staple includes:
a leg having a first end and a second end; and
a backspan including:
a segment extending at an angle from the first end of the leg, the segment being in abutment with the driver; and
a hooked portion connected to the segment, the hooked portion defining a notch configured for disposal of the second end of the leg upon deformation of the leg to interlock the second end of the leg with the backspan.
2. The end effector according to claim 1 , wherein the pocket is configured to direct movement of the staple along an axis defined by the pocket, the axis of the pocket extending at an acute angle relative to the longitudinal axis of the cartridge assembly.
3. The end effector according to claim 1 , wherein the driver has a planar driving surface, the driver being translatable along the longitudinal axis of the cartridge assembly such that engagement of the planar driving surface of the driver with the staple urges the staple towards engagement with the staple forming surface of the anvil to deform the staple.
4. The end effector according to claim 3 , wherein the cartridge assembly defines an elongate channel for housing the driver, the elongate channel intersecting the pocket.
5. The end effector according to claim 1 , wherein the backspan further includes an extension extending transversely relative to the segment.
6. The end effector according to claim 5 , wherein the staple is configured such that upon deformation thereof, the extension and the second end of the leg are oriented in opposing directions.
7. A surgical staple, comprising:
a first leg having a first end and a second end; and
a backspan including:
a segment extending at an angle from the first end of the first leg, the segment configured to abut a driver of a cartridge assembly; and
a hooked portion connected to the segment, the hooked portion defining a notch configured for disposal of the second end of the first leg upon deformation of the first leg to interlock the second end of the first leg with the backspan.
8. The surgical staple according to claim 7 , further comprising a second leg extending transversely relative to the segment.
9. The surgical staple according to claim 8 , wherein the surgical staple is configured such that upon deformation thereof, the second leg and the second end of the first leg are oriented in opposing directions.