Biomaterial occluder delivery mechanism

A retrieval system for recapturing a medical device at a target site, the retrieval system comprising:

• a medical device comprising:
• a frame having proximal and distal ends, the frame comprising a proximal disc at the proximal end, a distal disc at the distal end, and a connecting segment having a proximal end and a distal end connecting the proximal and distal discs, each of the proximal and distal discs include a respective plurality of prongs having a curvature in a first direction, each of the proximal and distal discs having a maximum cross-sectional dimension larger than the connecting segment;
• and
• at least one biomaterial cover, the at least one biomaterial cover comprising an outer section and an inner section defining a cavity therebetween, wherein at least one of the proximal and distal discs of the frame is positioned in the cavity, the at least one biomaterial cover further comprising a plurality of pockets corresponding to the plurality of prongs,
• wherein the plurality of prongs enable (1) de-coupling of the frame from the at least one biomaterial cover when the plurality of prongs are withdrawn from the plurality of pockets of the at least one biomaterial cover by rotation of the plurality of prongs in a second direction opposite the first direction after the medical device is fully deployed at the target site and (2) withdrawal of the frame from the target site;
• and
• a retrieval device comprising:
• a retrieval catheter;
• a recapture cable within the retrieval catheter and translatable with respect to the retrieval catheter;
• and
• a coupling member configured to couple the medical device to the recapture cable for rotation of the frame relative to the at least one biomaterial cover and withdrawal of the frame from the at least one biomaterial cover after endothelialization over the medical device at the target site has occurred.

A method of recapturing a device frame deployed at a target site, the method comprising:

• locating a medical device at the target site, the medical device including a frame having proximal and distal ends, the frame including a proximal disc at the proximal end, a distal disc at the distal end, and a connecting segment having a proximal end and a distal end connecting the proximal and distal discs, each of the proximal and distal discs including a respective plurality of prongs having a curvature in a first direction, each of the proximal and distal discs having a maximum cross-sectional dimension larger than the connecting segment, the medical device further including at least one biomaterial cover including an outer section and an inner section defining a cavity therebetween, wherein at least one of the proximal and distal discs of the frame is positioned in the cavity, the at least one biomaterial cover further comprising a plurality of pockets corresponding to the plurality of prongs, wherein the plurality of prongs enable (1) de-coupling of the frame from the at least one biomaterial cover when the plurality of prongs are withdrawn from the plurality of pockets of the at least one biomaterial cover by rotation of the plurality of prongs in a second direction opposite the first direction after the medical device is fully deployed at the target site and (2) withdrawal of the frame from the target site;
• deploying the medical device in an expanded configuration at the target site;
• after a threshold amount of endothelialization over the medical device has occurred, coupling a cable to the frame of the medical device;
• rotating the cable to constrict the plurality of prongs of the frame;
• and
• withdrawing the frame from the at least one biomaterial cover at the target site.