Composite stent with bioremovable ceramic flakes

摘要

A biodegradable and/or bioabsorbable composite stent includes a bioabsorbable ceramic material dispersed and embedded in a biodegradable polymeric material. The bioabsorbable ceramic material is made of flakes that have a thin, flat shape. In one embodiment, the composite stent comprises a body of one or more layers of polymer alone coupled to layers of polymer in which the ceramic flakes are dispersed and embedded and the composite is coiled to form the stent.

主权项

1. A composite stent comprising:
at least two layers each of which comprises a plurality of flakes of bioremovable ceramic material, each one of the plurality of flakes having a thin, flat shape; and at least three layers each of which comprises bioremovable polymer, the at least two layers that comprise bioremovable ceramic material being coupled to the at least three layers that comprise bioremovable polymer to form a sheet; wherein the stent is configured so that each of the at least two layers that comprise bioremovable ceramic material is positioned between two of the at least three layers that comprise bioremovable polymer; and wherein the sheet is coiled and configured to expand in a lumen.