| 主权项 |
1. A catheter assembly comprising:
an expandable and collapsible structure having an outer surface and an interior surface, wherein a lumen is disposed between the interior surface and a guide passage, 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, wherein the guard includes an interior surface bonded to the outer surface of the expandable and collapsible structure and an exterior surface opposite the interior surface; wherein the guard defines a plurality of orifices that extend through the interior and exterior surfaces 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. |
