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Publication Number
US-12357330-B2
Publication Date
2025-07-15
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 relates to a clot/embolus retrieval device for pulmonary embolism, including a downstream-deployable capturing basket configured to conform around a clot while trapping the clot within a plurality of pores. The capturing basket has a proximal opening that reduces in size to conform around the clot, and the captured clot is retained by the basket pores during retrieval.
The pore structure includes a pore-size gradient, where pores formed by spaces or gaps between braided wire have a distal pore size smaller than a proximal pore size. The capturing basket is configured for fluoroscopic visualization using radiopaque markers, including radiopaque wire materials and/or radiopaque markers that reveal a clot under fluoroscopy when the basket conforms around the clot.
A proximal opening size adjustment mechanism is described, including a pull-string mechanism and a locking mechanism associated with the proximal opening, and/or a pusher-wire/pushwire arrangement that reduces and/or increases the proximal opening size. The basket is delivered via a catheter having a distal opening that can be expandable, and the basket is retracted into the catheter during retrieval.
In at least some embodiments, the device includes a delivery catheter configuration with distal opening features and/or extrusions having sharp edges positioned to shear embolus/clot pieces during retrieval. Optional aspiration at the proximal catheter end is also described in connection with the retrieval system, and example use scenarios include saddle embolus cases.
Claims Coverage
Not explicitly described in patent.
Not explicitly described in patent.
Stated Advantages
Captures the clot within a plurality of pores while the capturing basket conforms around the clot.
Provides reduced proximal opening size to conform around the clot and trap it during retrieval.
Includes pore-size gradient behavior to retain embolus/clot fragments.
Provides fluoroscopic visualization of the clot using radiopaque markers.
Shears embolus/clot pieces during retrieval using sharp-edged extrusions and/or repeated opening/closing while capturing fragments in basket pores.
Documented Applications
Use for clot/embolus retrieval in pulmonary embolism, including pulmonary artery and saddle embolus scenarios.
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