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Publication Number
US-11272945-B2
Publication Date
2022-03-15
Expiration Date
Abstract
A clot retrieval device is provided. The clot retrieval device includes a capturing basket having an opening at a proximal end where the capturing basket is deployable downstream from a clot in a blood vessel. The capturing basket is configured to surround a portion of the clot and the opening in the proximal end of the capturing basket is configured to reduce in size such that the capturing basket conforms around the portion of the clot and be retrieved after the capturing basket conforms around the portion of the clot.
Core Innovation
The invention provides a clot retrieval device that includes a capturing basket having an opening at a proximal end and a delivery catheter. The capturing basket is deployable downstream from a clot in a blood vessel and is configured to surround a portion of the clot. The opening in the proximal end of the capturing basket reduces in size such that the capturing basket conforms around the portion of the clot.
The capturing basket is configured to be retrieved by a distal opening of the delivery catheter after the capturing basket conforms around the portion of the clot. The capturing basket has spaced pores that increase in size from a distal end of the capturing basket to the proximal end of the capturing basket. In the device, the distal opening of the delivery catheter has one or more extrusions extending from an inner surface of the delivery catheter, and the one or more extrusions have sharp edges.
The one or more extrusions are retractable and are configured to shear the clot when the capturing basket is retrieved by the distal end of the delivery catheter. A gradient of pore sizes is formed by braided wire, and the device can include radiopaque textured markers for fluoroscopic visualization. An inflatable funnel-shaped balloon near the distal tip can facilitate basket retrieval while allowing blood flow and blocking large objects.
Claims Coverage
Two independent claims are present, each centered on a downstream-deployable capturing basket that conforms to a clot through reduction of a proximal-end opening, with distal-to-proximal increasing pore size, and a delivery-catheter distal opening that includes retractable, sharp-edged extrusions configured to shear the clot during retrieval.
Downstream-deployable conforming capturing basket with proximal-end opening reduction
A capturing basket deployable downstream from a clot, configured to surround a portion of the clot, wherein the opening at the proximal end reduces in size such that the capturing basket conforms around the portion of the clot.
Pore size gradient increasing from distal to proximal
The capturing basket has spaced pores that increase in size from a distal end of the capturing basket to the proximal end of the capturing basket.
Retrieval through delivery catheter distal opening after conformation
The capturing basket is configured to be retrieved by a distal opening of the delivery catheter after the capturing basket conforms around the portion of the clot.
Retractable sharp-edged extrusions at the delivery catheter distal opening for shearing
The distal opening of the delivery catheter has one or more retractable extrusions extending from an inner surface, the extrusions having sharp edges and being configured to shear the clot when the capturing basket is retrieved by the distal end of the delivery catheter.
Braided-wire pore formation with distal-to-proximal increasing pore size
The capturing basket has spaced pores formed from spaces between a braided wire that increase in size from a distal end of the capturing basket to the proximal end of the capturing basket.
Across both independent claims, the inventive concept is a downstream-deployable capturing basket with a proximal-end opening that reduces to conform to a clot, a pore size distribution increasing from distal to proximal, and retrieval through the delivery catheter distal opening that includes retractable, sharp-edged extrusions configured to shear the clot.
Stated Advantages
Reduces the capturing basket opening in size so the capturing basket conforms around the portion of the clot.
Shears the clot when the capturing basket is retrieved by the distal end of the delivery catheter.
Allows the capturing basket to be retrieved by the distal opening of the delivery catheter after conformance.
Enables visualization under fluoroscopy when radiopaque material is positioned on the capturing basket.
Allows blood flow while blocking large blood clots with a funnel-shaped inflatable balloon having pores.
Documented Applications
Clot retrieval for pulmonary embolism using a downstream-deployable capturing basket in a blood vessel.
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