Expandable tip assembly for thrombus management
First Claim
1. An expandable tip assembly adapted to address an occlusive thrombus within a blood vessel, comprising:
- an elongate member;
a tubular scaffold coupled to a distal end of the elongate member, the scaffold comprising a plurality of cells and configured to radially self-expand from a non-expanded configuration within a catheter to an expanded configuration upon unsheathing of the scaffold from the catheter;
wherein the scaffold has, across scaffold diameters of 2.0 mm to 4.5 mm, a radial resistive force (RRF) range per unit length of 0.005 N/mm to 0.016 N/mm.
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Accused Products
Abstract
Systems, methods, and devices for the treatment of acute ischemic stroke that provide immediate blood flow restoration to a vessel occluded by a clot and, after reestablishing blood flow, address the clot itself. Immediate blood flow restoration advantageously can facilitate natural lysis of the clot and also can reduce or obviate the concern for distal embolization due to fragmentation of the clot. Several embodiments of the invention provide for progressive, or modular, treatment based upon the nature of the clot. For example, the progressive treatment can include immediate restoration of blood flow, in-situ clot management, and/or clot removal depending on the particular circumstances of the treatment. The in-situ clot management can include, for example, lysis, maceration, and/or removal.
565 Citations
26 Claims
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1. An expandable tip assembly adapted to address an occlusive thrombus within a blood vessel, comprising:
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an elongate member; a tubular scaffold coupled to a distal end of the elongate member, the scaffold comprising a plurality of cells and configured to radially self-expand from a non-expanded configuration within a catheter to an expanded configuration upon unsheathing of the scaffold from the catheter; wherein the scaffold has, across scaffold diameters of 2.0 mm to 4.5 mm, a radial resistive force (RRF) range per unit length of 0.005 N/mm to 0.016 N/mm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An expandable tip assembly adapted to address an occlusive thrombus within a blood vessel, comprising:
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an elongate member; a tubular scaffold coupled to a distal end of the elongate member, the scaffold comprising a plurality of cells and configured to radially self-expand from a non-expanded configuration within a catheter to an expanded configuration upon unsheathing of the scaffold from the catheter; wherein the scaffold has a radial resistive force (RRF) of 0.011 N/mm to 0.016 N/mm at a scaffold diameter of 2.0 mm, and of 0.005 N/mm to 0.007 N/mm at a scaffold diameter of 4.5 mm. - View Dependent Claims (21, 22, 23)
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24. An expandable tip assembly adapted to address an occlusive thrombus within a blood vessel, comprising:
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an elongate member; a tubular scaffold coupled to a distal end of the elongate member, the scaffold comprising a plurality of cells and configured to radially self-expand from a non-expanded configuration within a catheter to an expanded configuration upon unsheathing of the scaffold from the catheter; wherein the scaffold has, across scaffold diameters of 2.0 mm to 4.5 mm, an average radial resistive force (RRF) per unit length of between 0.0067 N/mm and 0.0138 N/mm. - View Dependent Claims (25, 26)
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Specification