HELICAL COIL DELIVERY DEVICE FOR ACTIVE AGENT

摘要

A delivery device includes a substrate (201) formed in a coil (200); a plurality of cavities (202) for holding an active agent, the cavities (202) disposed along a length of the substrate (201) between an inner surface (304) and an outer surface (305) of the substrate (201) formed in the coil (200); and a plurality of seals (204) defining a closed volume of the cavities (202), wherein the seals (204) are configured for sequential opening of the cavities (202).