Patent ID: 9468746
Filing Date: 2016-10-18
CPC Classification: A61B,A61F,A61M

Claim Text:
1. A bioactive material delivery device for use at a treatment site in a lumen having an inner wall, the bioactive material delivery device comprising: a tubular structure comprising: two or more expandable ring members; and a biocompatible covering having a uniform natural diameter less than a diameter of the two or more expandable ring members, the biocompatible covering being connected to the two or more expandable ring members, the biocompatible covering having first portions in contact with the two or more expandable ring members and a second portion extending between an adjacent pair of the two or more expandable ring members, the first portions having a first expanded diameter and the second portion having a second expanded diameter, the second expanded diameter being less than the first expanded diameter; wherein, when said two or more expandable ring members are expanded, said two or more expandable ring members expand the second portion of said biocompatible covering not in direct contact with said two or more expandable ring members to the second expanded diameter less than the first expanded diameter of said expanded two or more expandable ring members, and expand the first portions from the natural diameter to the first expanded diameter, the first expanded diameter being selected to seal the first portions against the inner wall of said lumen and to prevent fluid flow between the first portions and the inner wall; and when said bioactive material delivery device is fully deployed at the treatment site within the lumen, an outer surface of the second portion of said biocompatible covering, the inner wall of said lumen, and the adjacent pair of the two or more expandable ring members define a bioactive material delivery space.