Device and method for centering and crossing a vascular occlusion
Inventors
Assignees
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Publication Number
US-12599398-B2
Publication Date
2026-04-14
Expiration Date
Abstract
A catheter for centrally crossing an occluded blood vessel includes a catheter body having a distal end, a proximal end, and a central passage. A rotatable drive shaft extending through the central passage and has a distal end, a proximal end, and a central lumen. A cutting tip is mounted on the distal end of the rotatable drive shaft and configured to cut through occlusive material when rotated. A plurality of spiral or other flat springs is disposed circumferentially about a distal portion of the catheter body to maintain centering of the catheter and form a passage as the catheter is advanced through a chronic total occlusion.
Core Innovation
The invention relates to a catheter system and a method for centrally crossing an occluded blood vessel. The method advances a catheter through an occlusion and rotates or rotationally oscillates a cutting tip mounted on a distal end of the catheter to cut through occlusive material while the catheter is advanced, creating a passage through the occlusion.
A plurality of flat springs elastically self-expand from a radially constrained configuration to a radially expanded configuration. As the catheter is advanced, the flat springs atraumatically engage a wide lateral surface of each flat spring against a wall region of the blood vessel to centrally align at least the cutting tip in a lumen of the blood vessel, and a narrow distal edge on each flat spring penetrates through the occlusion.
The plurality of flat springs are proximal of and distinct from the cutting tip. The disclosed concepts include spiral/flat spring centering cage behavior that deploys from radial constraint, lateral engagement with low-profile flat spring surfaces for central alignment, and a variant that allows axial advancement and retraction of the cutting tip relative to the centering cage for use in tortuous vessels.
Claims Coverage
The independent claim is directed to a method for centrally crossing an occluded blood vessel using a distal cutting tip and proximal, distinct flat springs. The inventive structure and sequence are concentrated in the cutting tip rotation/oscillation together with proximal elastically self-expanding flat springs that atraumatically engage and centrally align the cutting tip while their narrow distal edges penetrate the occlusion as the catheter advances.
Centrally crossing by advancing and cutting tip rotation or rotational oscillation
Advancing a catheter through an occlusion in the blood vessel; and rotating or rotationally oscillating a cutting tip mounted on a distal end of the catheter to cut through occlusive material as the catheter is advanced, creating a passage through the occlusion.
Flat springs self-expanding from radially constrained to radially expanded configuration for central alignment and penetration
A plurality of flat springs elastically self-expand from a radially constrained configuration to a radially expanded configuration to atraumatically engage a wide lateral surface of each flat spring against a wall region of the blood vessel to centrally align at least the cutting tip in a lumen of the blood vessel as the catheter is advanced, and to penetrate a narrow distal edge on each flat spring through the occlusion as the catheter is advanced.
Flat springs proximal of and distinct from the cutting tip
The plurality of flat springs are proximal of and distinct from the cutting tip.
Across the provided independent claim, the main inventive concept is the combination of a rotating or rotationally oscillating distal cutting tip that creates a passage while advancing, and proximal flat springs that self-expand to atraumatically engage and centrally align the cutting tip while their narrow distal edges penetrate the occlusion.
Stated Advantages
Atraumatically engage a wide lateral surface against a wall region to centrally align at least the cutting tip in a lumen as the catheter is advanced.
Penetrate a narrow distal edge on each flat spring through the occlusion as the catheter is advanced.
Documented Applications
Centrally crossing an occluded blood vessel.
Centrally crossing chronic total occlusions (CTO).
Use in tortuous vessels via a variant allowing axial advancement and retraction of the cutting tip relative to the centering cage.
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