Surgical staple cartridge with compression feature at knife slot

1. An apparatus comprising:

(a) a body;

(b) a shaft assembly extending distally from the body, wherein the shaft assembly defines a longitudinal axis;

(c) an end effector, wherein the end effector comprises:

(i) an anvil, and

(ii) a lower jaw, wherein the anvil is pivotable toward the lower jaw to capture tissue between the anvil and the lower jaw; and

(d) a staple cartridge coupled with the lower jaw, wherein the staple cartridge comprises:

(i) a deck facing the anvil, and

(ii) a plurality of staples positioned in a plurality of staple openings formed through the deck;

wherein at least one of the anvil or the deck comprises a compressible feature extending toward the other of the anvil or the deck, wherein the compressible feature is positioned so as to not extend across the staple openings when the end effector is closed,

wherein the at least one compressible feature of the anvil or the deck is configured to compress tissue against the other of the anvil or the deck,

wherein the at least one compressible feature is configured to deform while compressing the tissue.

2. The apparatus of claim 1 , wherein the staple cartridge defines a channel, wherein the compressible feature extends at least partially along the channel in a direction that is parallel to the longitudinal axis.

3. The apparatus of claim 2 , wherein the compressible feature comprises a single unitary member spanning laterally across the channel.

4. The apparatus of claim 2 , wherein the compressible feature comprises a pair of elongate members extending along opposite sides of the channel.

5. The apparatus of claim 4 , wherein the elongate members each comprise a fin.

6. The apparatus of claim 2 , wherein the compressible feature spans laterally across the channel along an arc.

7. The apparatus of claim 2 , further comprising a firing bar slidingly received in the channel and movable through the end effector to effect severing and stapling of the tissue.

8. The apparatus of claim 7 , wherein the compressible feature is positioned relative to the channel such that the firing bar is configured to sever the compressible feature as the firing bar moves through the channel.

9. The apparatus of claim 7 , wherein the compressible feature is positioned relative to the channel such that the firing bar is configured to displace the compressible feature away from a plane passing through the longitudinal axis.

10. The apparatus of claim 7 , wherein the compressible feature is configured to remain on the anvil or the deck after the firing bar moves through the end effector to sever and staple tissue.

11. The apparatus of claim 2 , wherein the compressible feature comprises a pair of bumper rails, wherein the bumper rails extend longitudinally along at least a portion of the length of the channel, wherein the bumper rails are positioned on opposite lateral sides of the channel.

12. The apparatus of claim 1 , wherein the anvil defines a channel, wherein the compressible feature extends at least partially along the channel.

13. The apparatus of claim 1 , wherein the deck presents a deck surface facing the anvil, wherein the compressible feature is integral with the deck surface.

14. The apparatus of claim 1 , wherein the anvil presents an anvil surface facing the deck, wherein the compressible feature is integral with the anvil surface.

15. The apparatus of claim 1 , wherein the compressible feature comprises a foam material.

16. The apparatus of claim 1 , wherein the compressible feature comprises an elastomeric material.

17. An end effector for use with a surgical stapler, the end effector comprising:

(a) a first jaw, wherein the first jaw comprises a first channel extending along a longitudinally extending plane;

(b) a second jaw, wherein the second jaw comprises a second channel extending along the longitudinally extending plane, wherein the first channel and second channel are configured to slidingly receive a portion of a firing member, wherein the first jaw is pivotable toward the second jaw to capture tissue between the first and second jaws; and

(c) a compressible feature fixedly positioned along a lateral side of one of the first channel of the first jaw or the second channel of the second jaw, wherein the compressible feature has a pre-formed convex shape configured to urge tissue captured between the first and second jaws toward the other of the first jaw or the second jaw.

18. The end effector of claim 17 , wherein the second jaw comprises a staple cartridge defining a cartridge deck, wherein the staple cartridge defines the second channel, wherein the compressible feature extends from the cartridge deck across the second channel.

19. An apparatus comprising:

(a) a first jaw;

(b) a second jaw opposed from the first jaw, wherein the first and second jaws are configured to capture tissue therebetween;

(c) a firing member slidably received by at least one of the first jaw or the second jaw, wherein the firing member is configured to translate distally along a plane to sever the captured tissue; and

(d) a compressible feature supported by one of the first jaw or the second jaw so as to extend across the plane, wherein the compressible feature is configured to urge the captured tissue toward the other of the first jaw or the second jaw,

wherein the firing member is configured to translate distally along the plane and through the compressible feature while severing the captured tissue to thereby urge the compressible feature away from the plane,

wherein the compressible feature is configured to remain on the one of the first jaw or the second jaw after the firing member translates distally to sever the captured tissue.

20. The apparatus of claim 19 , wherein the compressible feature is fixed relative to the one of the first jaw or the second jaw, wherein the compressible feature is configured to deform while urging the captured tissue toward the other of the first jaw or the second jaw.