IVC filter retrieval systems with releasable capture feature
First Claim
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1. A medical method performed in the vasculature of a patient, the method comprising:
- advancing a funnel-trap shaped retrieval extension of a retrieval device over a proximal end of an implanted medical device, wherein the retrieval extension comprises braid with a first fold that forms two layers of the braid and a second fold in the two layers of the braid that forms a distal opening and an inwardly-directed flap, wherein a proximal opening is formed by the first fold;
capturing the proximal end of the medical device with the inwardly-directed flap of the retrieval extension after the proximal end of the medical device has been advanced beyond the discrete proximal opening; and
everting the flap to release the hooked end after capture.
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Abstract
Funnel-trap type devices or systems made of braid are described for capture and retrieval or, instead, capture and subsequent release of Inferior Vena Cava (IVC) filters or other medical devices. Delivery and/or retrieval devices, kits in which they are included, methods of use and methods of manufacture are all contemplated.
148 Citations
17 Claims
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1. A medical method performed in the vasculature of a patient, the method comprising:
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advancing a funnel-trap shaped retrieval extension of a retrieval device over a proximal end of an implanted medical device, wherein the retrieval extension comprises braid with a first fold that forms two layers of the braid and a second fold in the two layers of the braid that forms a distal opening and an inwardly-directed flap, wherein a proximal opening is formed by the first fold; capturing the proximal end of the medical device with the inwardly-directed flap of the retrieval extension after the proximal end of the medical device has been advanced beyond the discrete proximal opening; and everting the flap to release the hooked end after capture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A medical method performed in the vasculature of a patient, the method comprising:
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advancing a funnel-trap shaped retrieval extension of a retrieval device over a hooked end of an implanted medical device, wherein the retrieval extension comprises braid with a first fold that forms two layers of the braid and a second fold in the two layers of the braid that forms a distal opening and an inwardly-directed flap, wherein a proximal opening is formed by the first fold; capturing the hooked end of the medical device with the inwardly-directed flap of the retrieval extension by advancing the hooked end of the medical device beyond the proximal opening such that the hooked end of the medical device passes over the inwardly-directed flap; and everting the flap to release the hooked end after capture. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification