Catheter assembly with guard
AssigneeSurModics, Inc.
InventorRalph A. Chappa
Life of this patent
Estimating the term…
Abstract
A catheter assembly includes an expandable and collapsible structure having an outer surface. The expandable and collapsible structure is adapted to expand between a contracted state and a dilated state. A guard is bonded to the outer surface of the expandable and collapsible structure. The guard and the expandable and collapsible structure cooperatively define a plurality of reservoirs. A coating disposed in the reservoirs. The coating includes a bioactive agent. The coating protrudes from the reservoirs when the expandable and collapsible structure is expanded to the dilated state.
Claims40
A catheter assembly comprising:
- an expandable and collapsible structure having an outer surface, the expandable and collapsible structure being adapted to expand between a contracted state and a dilated state;
- a guard bonded to the outer surface of the expandable and collapsible structure, the guard and the expandable and collapsible structure cooperatively defining a plurality of reservoirs;
- and
- a coating disposed in the reservoirs, the coating including a bioactive agent, wherein the coating protrudes from the reservoirs when the expandable and collapsible structure is expanded to the dilated state.
A catheter assembly comprising:
- an expandable and collapsible structure having an outer surface, the expandable and collapsible structure being adapted to expand between a contracted state and a dilated state, the expandable and collapsible structure being made of a first material;
- a guard bonded to the outer surface of the expandable and collapsible structure, the guard being made of a second material that is less flexible than the first material, the guard and the expandable and collapsible structure cooperatively defining a plurality of reservoirs with the outer surface of the expandable and collapsible structure forming base walls of the reservoirs and the guard forming sidewalls of the reservoirs;
- and
- a coating disposed in the reservoirs, the coating including a bioactive agent, wherein the coating protrudes from the reservoirs when the expandable and collapsible structure is expanded to the dilated state.
A catheter assembly comprising:
- an expandable and collapsible structure having an outer surface, the expandable and collapsible structure being adapted to expand between a contracted state and a dilated state;
- a guard disposed on the outer surface of the expandable and collapsible structure, the guard including a fold line that extends between a first end of the guard and an oppositely disposed second end, the fold line having an area of reduced thickness, the guard and the expandable and collapsible structure cooperatively defining a plurality of reservoirs with the outer surface of the expandable and collapsible structure forming base walls of the reservoirs and the guard forming sidewalls of the reservoirs;
- and
- a coating disposed in the reservoirs, the coating including a bioactive agent, wherein the coating protrudes from the reservoirs when the expandable and collapsible structure is expanded to the dilated state.
A method of applying a coating to a catheter assembly, the method comprising:
- heating a coating so that the coating is in a flowable state;
- applying a measured amount of the coating to reservoirs cooperatively defined by a expandable and collapsible structure and a guard that is bonded to an outer surface of the expandable and collapsible structure;
- and
- cooling the coating so that the coating is in a non-flowable state.
A method of applying a coating to a catheter assembly, the method comprising:
- applying a coating to an exterior surface of a guard that is affixed to an expandable and collapsible structure of a catheter assembly, wherein the guard and the expandable and collapsible structure define a plurality of reservoirs having openings at the exterior surface of the guard;
- placing the guard and expandable and collapsible structure in an inner bore of a sheath;
- heating the coating so that the coating is in a flowable state;
- and
- sliding the guard and expandable and collapsible structure out of the sheath so that coating on the exterior surface of the guard is substantially removed.
Dependencies are inferred from the claim text.