US Patent 10188390 Adjunct material to provide heterogeneous drug elution

Adjunct material to provide drug elution is a variety of different temporal and/or spatial patterns is provided. In general, a biocompatible adjunct having a plurality of distinct regions is configured to be delivered to tissue by deployment of staples in a cartridge body of a surgical stapler. Each of the distinct regions can be disposed at a different location on the adjunct material and can have a different adjunct construction. At least two of the regions releasably retain at least one medicant and each of the at least one medicants is releasable from one of the regions in a non-homogeneous manner with respect to at least one of time of release and location of release.