Coating for implantable medical devices
AssigneeAdvanced Cardiovascular Systems, Inc.
InventorsSyed F. A. Hossainy, Yiwen Tang, Andrew C. Tung, Stephen D. Pacetti
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Abstract
An implantable medical device, such as a stent, is disclosed having a coating. The coating includes a poly(butylene terephthalate-co-ethylene glycol)polymer. The coating can also include a drug.
Claims14
An implantable medical device, comprising a coating, the coating including a poly(butylene terephthalate-co-ethylene glycol)polymer,
- wherein the poly(butylene terephthalate-co-ethylene glycol)polymer comprises hydrophilic units derived from ethylene glycol between about 40% and about 90 molar % of the total units of the PBT-PEG polymer, and
- wherein the coating is formed-by a method comprising a post-coating process to cause the hydrophilic units to be extracted or bloom to the coating-air interface.
An implantable medical device, comprising a coating, the coating including a first region comprising poly(butylene terephthalate-co-ethylene glycol) and a second region comprising poly(butylene terephthalate-co-ethylene glycol), wherein the mole % of the ethylene glycol is higher in the second region than the first region,
- wherein units of ethylene glycol in poly(butylene terephthalate-co-ethylene glycol) of the first region or units of ethylene glycol in poly(butylene terephthalate-co-ethylene glycol) of the second region were extracted or bloomed to the coating-air interface.
Dependencies are inferred from the claim text.