US Patent 11446027 Compressible knitted adjuncts with surface features

Adjuncts for use with a surgical stapler are provided. In one exemplary embodiment, an adjunct can include a first knitted layer, a second knitted layer, and a plurality of recesses that extend into and defined within the second knitted layer. The plurality of recesses can be arranged in a predefined pattern that coincides with a plurality of attachment features extending outward from a top surface of a cartridge such that each recess of the plurality of recesses is configured to engage with at least a portion of at least one attachment feature to form a friction fit therebetween to thereby retain the adjunct on the cartridge prior to staple deployment. Stapling assemblies for use with a surgical stapler are also provided.