Patent ID: 8668667

Claim:
A catheter assembly comprising: an inner expandable and collapsible structure, an outer expandable and collapsible structure, the inner and outer expandable and collapsible structures each being configured to expand between a contracted state and a dilated state; the inner and outer expandable and collapsible structures defining a cavity therebetween, the cavity being configured to contain a benefit composition; the outer expandable and collapsible structure defining openings, the openings being configured to be closed when the assembly is in the contracted state and open when the assembly is in the dilated state; when open, the openings provide fluid communication from the cavity to surroundings of the assembly, wherein the outer expandable and collapsible structure comprises an expandable and contractible membrane and an inner photolinkable seal material scissile coating, an outer photolinkable seal material scissile coating, or both inner and outer photolinkable seal material scissile coatings, and in the dilated state, the openings extending through the scissile coating or coatings.