Surgical end effectors and anvils
A surgical end effector is disclosed. The end effector can include an anvil comprising a planar surface, wherein a plurality of forming pockets is defined in the planar surface. The forming pockets can include a first forming pocket comprising a first depth and a second forming pocket comprising a second depth, wherein the second depth is different than the first depth. The end effector can also include a staple cartridge comprising a stepped deck, a first driver aligned with the first pocket and movable a first distance between an unfired position and a fired position, and a second driver aligned with the second pocket and movable a second distance between an unfired position and a fired position, wherein the second distance is different than the first distance.
1. A surgical end effector, comprising:
an anvil movable between an open position and a closed position, wherein said anvil comprises a non-stepped planar surface, wherein a plurality of forming pockets are defined in said non-stepped planar surface, and wherein said plurality of forming pockets comprise:
a first forming pocket comprising a first depth; and
a second forming pocket comprising a second depth, wherein said second depth is different than said first depth; and
a staple cartridge, comprising:
a deck, comprising:
a first tissue-contacting surface aligned with said first pocket;
a second tissue-contacting surface aligned with said second pocket, wherein a first tissue gap is defined between said first tissue-contacting surface and said non-stepped planar surface, wherein a second tissue gap is defined between said second tissue-contacting surface and said non-stepped planar surface, and wherein said second tissue gap is less than said first tissue gap;
a step intermediate said first tissue-contacting surface and said second tissue-contacting surface, wherein said second tissue-contacting surface is positioned above said first tissue-contacting surface;
a longitudinal slot, wherein said first tissue-contacting surface and said second tissue-contacting surface are positioned on one side of said longitudinal slot, and wherein said second tissue-contacting surface is positioned further away from said longitudinal slot than said first tissue-contacting surface; and
a plurality of drivers, comprising:
a first driver aligned with said first pocket and movable a first distance between an unfired position and a fired position, wherein said first driver comprises a first drive surface; and
a second driver aligned with said second pocket and movable a second distance between an unfired position and a fired position, wherein said second distance is different than said first distance, and wherein said second driver comprises a second drive surface; and
a plurality of staples, comprising:
a first staple supported on said first drive surface of said first driver, wherein said first drive surface is positioned above said first tissue-contacting surface of said deck when said first driver is in said fired position, and wherein said first staple is formed to a first formed height intermediate said first driver and said first pocket; and
a second staple supported on said second drive surface of said second driver, wherein said second drive surface is positioned above said second tissue-contacting surface of said deck when said second driver is in said fired position, and wherein said second staple is formed to a second formed height intermediate said second driver and said second pocket, and wherein said first formed height is equal to said second formed height.
2. The surgical end effector of claim 1 , wherein the difference between said first distance and said second distance corresponds to the difference between said first depth and said second depth.
3. The surgical end effector of claim 1 , wherein said first staple comprises a first unformed height, wherein said second staple comprises a second unformed height, and wherein said second unformed height is equal to said first unformed height.
4. The surgical end effector of claim 1 , wherein said first staple comprises a first unformed height, wherein said second staple comprises a second unformed height, and wherein said second unformed height is different than said first unformed height.
5. The surgical end effector of claim 1 , wherein said staple cartridge is replaceable.
6. The surgical end effector of claim 1 , further comprising:
a plurality of staple cavities defined in said staple cartridge, wherein each staple cavity defines an opening in said deck; and
a plurality of discrete staple cavity extenders at least partially surrounding each opening in said deck.
7. A staple forming apparatus, comprising:
a plurality of first staples, wherein each said first staple is supported by a first drive surface;
a plurality of second staples, wherein each said second staple is supported by a second drive surface;
a non-stepped tissue compression surface, wherein a plurality of forming pockets are defined in said non-stepped tissue compression surface, and wherein said plurality of forming pockets comprise:
a longitudinal row of first forming pockets each comprising a first depth, wherein each said first forming pocket is configured to form a said first staple to a first formed height within a first range of formed heights; and
a longitudinal row of second forming pockets each comprising a second depth, wherein said second depth is different than said first depth, wherein each said second forming pocket is configured to form a said second staple to a second formed height within a second range of formed heights, and wherein said second range of formed heights is equal to said first range of formed heights; and
a staple cartridge comprising a deck and a longitudinal slot, wherein said deck comprises a tissue-contacting surface comprising a first deck surface and a second deck surface positioned on one side of said longitudinal slot, wherein said second deck surface is positioned above said first deck surface, wherein said second deck surface is positioned further away from said longitudinal slot than said first deck surface, wherein each said first drive surface is configured to drive a said first staple a first overdrive distance above said first deck surface, wherein each said second drive surface is configured to drive a said second staple a second overdrive distance above said second deck surface, wherein a first tissue gap is defined between said first deck surface and said non-stepped tissue compression surface, wherein a second tissue gap is defined between said second deck surface and said non-stepped tissue compression surface, and wherein said second tissue gap is less than said first tissue gap.
8. The staple forming apparatus of claim 7 , wherein said first depth is double said second depth.
9. The staple forming apparatus of claim 8 , wherein said longitudinal row of first forming pockets and said longitudinal row of second forming pockets are positioned on one side of said longitudinal slot, and wherein said longitudinal row of first forming pockets is positioned further away from said longitudinal slot than said longitudinal row of second forming pockets.
10. The staple forming apparatus of claim 7 , wherein said first overdrive distance corresponds to said first depth, and wherein said second overdrive distance corresponds to said second depth.
11. The staple forming apparatus of claim 7 , wherein each said first drive surface is movable a first distance between an unfired position and a fired position, wherein each said second drive surface is movable a second distance between an unfired position and a fired position, and wherein said second distance is different than said first distance.
12. The staple forming apparatus of claim 11 , wherein the difference between said first distance and said second distance corresponds to the difference between said first depth and said second depth.
13. The staple forming apparatus of claim 7 , further comprising:
a plurality of staple cavities defined in said staple cartridge, wherein each staple cavity defines an opening in said deck; and
a plurality of discrete staple cavity extenders at least partially surrounding each opening in said deck.
14. A surgical end effector, comprising:
an anvil comprising a non-stepped tissue compression surface, wherein a plurality of forming pockets are defined in said tissue compression surface, and wherein said plurality of forming pockets comprise:
a first forming pocket comprising a first depth; and
a second forming pocket comprising a second depth, wherein said second depth is different than said first depth; and
a staple cartridge, comprising:
a longitudinal slot;
a deck comprising a tissue-contacting surface, wherein said tissue contacting surface comprises a first planar surface and a second planar surface positioned on one side of said longitudinal slot, wherein said second planar surface is positioned above said first planar surface, wherein a first tissue gap is defined between said first planar surface and said non-stepped tissue compression surface when said surgical end effector is in a closed configuration, wherein a second tissue gap is defined between said second planar surface and said non-stepped tissue compression surface when said surgical end effector is in said closed configuration, and wherein said second tissue gap is less than said first tissue gap;
a plurality of drivers comprising a first driver and a second driver; and
a plurality of staples, comprising:
a first staple comprising a first unformed height and supported on a first drive surface of said first driver, wherein said first staple is driven a first distance into forming contact with said first pocket by said first driver and formed to a first formed height, and wherein said first drive surface is positioned above said tissue-contacting surface of said deck when said first staple is formed to said first formed height; and
a second staple comprising a second unformed height and supported on a second drive surface of said second driver, wherein said second staple is driven a second distance into forming contact with said second pocket by said second driver to a second formed height, wherein said second distance is different than said first distance, wherein said second drive surface is positioned above said tissue-contacting surface of said deck when said second staple is formed to said first formed height, wherein said second formed height is substantially the same as said first formed height, and wherein the difference between said first distance and said second distance corresponds to the difference between said first depth and said second depth.
15. The surgical end effector of claim 14 , further comprising a sled configured to displace said first driver a first lift length and configured to displace said second driver a second lift length during a staple firing stroke, wherein said first lift length is different than said second lift length.
16. The surgical end effector of claim 14 , wherein said first driver is configured to drive said first staple a first overdrive distance relative to said tissue-contacting surface of said deck, wherein said first overdrive distance corresponds to said first depth, wherein said second driver is configured to drive said second staple a second overdrive distance relative to said tissue-contacting surface of said deck, and wherein said second overdrive distance corresponds to said second depth.
17. The surgical end effector of claim 14 , wherein said staples comprise a staple diameter, wherein said first depth is equal to said staple diameter, and wherein said second depth is equal to twice said staple diameter.
18. The surgical end effector of claim 14 , further comprising:
a plurality of staple cavities defined in said staple cartridge, wherein each staple cavity defines an opening in said deck; and
a plurality of discrete staple cavity extenders at least partially surrounding each opening in said deck.