Guidewire for crossing occlusions or stenoses
First Claim
Patent Images
1. A steerable hollow guidewire comprising:
- an elongate hollow guidewire body comprising a proximal opening, a distal opening, and an axial lumen extending from the proximal opening to the distal opening;
a rotatable drive shaft disposed within the axial lumen, wherein a distal tip of the rotatable drive shaft is adapted to extend distally through the distal opening in the guidewire body; and
at least one pull wire extending through the axial lumen and coupled to a distal end portion of the guidewire body, the pull wire(s) comprising a curved surface that substantially corresponds to a shape of an inner surface of the axial lumen.
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Accused Products
Abstract
A hollow guidewire for removing tissue from a body lumen, such as a coronary artery. The hollow guidewire comprises an elongate, tubular guidewire body that has an axial lumen. A tissue removal assembly, such as a rotating drive shaft, is positioned at or near a distal end of the tubular guidewire body and extends through the axial lumen. Actuation of the tissue removal assembly removes occlusive material in the body lumen.
161 Citations
42 Claims
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1. A steerable hollow guidewire comprising:
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an elongate hollow guidewire body comprising a proximal opening, a distal opening, and an axial lumen extending from the proximal opening to the distal opening;
a rotatable drive shaft disposed within the axial lumen, wherein a distal tip of the rotatable drive shaft is adapted to extend distally through the distal opening in the guidewire body; and
at least one pull wire extending through the axial lumen and coupled to a distal end portion of the guidewire body, the pull wire(s) comprising a curved surface that substantially corresponds to a shape of an inner surface of the axial lumen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 18)
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- 16. A hollow guidewire comprising a hypotube that comprises a proximal portion and a distal portion, wherein at least a part of the distal portion of the hypotube comprise helical windings formed thereon so that the distal portion of the hypotube is more flexible than the proximal portion.
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27. A steerable guidewire comprising:
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a hollow guidewire body comprising a proximal end, a distal end, and an axial lumen that extends to the distal end;
a tissue removal assembly, wherein a portion of the tissue removal assembly is positioned at or near the distal end of the guidewire body; and
at least one pull wire that extends through the axial lumen and is coupled at or near the distal end of the hollow guidewire body, wherein a proximal force on the pull wire steers the distal end of the hollow guidewire. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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42. A hollow guidewire comprising a proximal portion and a distal portion, wherein at least a part of the distal portion comprises helical windings that have a decreasing pitch between adjacent windings in the distal direction so that a distal end of the hollow guidewire is more flexible than the proximal portion of the hollow guidewire.
Specification