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US 12,685,844 B2Granted
Guidewire with elastically articulatable tip
AssigneeEmbrace Medical Ltd
InventorMichael Gabriel Tal
Life of this patent
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Abstract
A guidewire for vascular access has an elastically articulatable tip configured to minimize risk of vessel wall damage during initial insertion of the guidewire into the vasculature of a patient. The guidewire may have a local flexible portion in a tip segment of the guidewire and/or a core thereof.
Claims31
A guidewire for transluminal routing of artifacts in a blood vessel, comprising:
- a guidewire body comprising an elastic core member extending along at least most of the length of the guidewire body, the guidewire body comprising a guidewire proximal segment, a tip segment and a guidewire intermediate segment extending between the guidewire proximal segment and the tip segment;
- wherein resistance to bending of the guidewire intermediate segment along at least most of the length thereof is smaller than resistance to bending along at least most of the length of the guidewire proximal segment;
- wherein the tip segment includes a local flexing portion having a resistance to bending smaller than (1) the resistance to bending of the guidewire intermediate segment, (2) of a front portion of the tip segment extending to distally from the local flexing portion, and (3) of a rear portion of the tip segment extending proximally from the local flexing portion, thereby affecting localized elastic articulatability of the front portion of the tip segment relative to the rear portion of the tip segment and/or to the guidewire intermediate segment;
- wherein the elastic core member has a diameter that reduces from a first diameter proximal to a narrowing to a second diameter smaller than the first diameter distal to the narrowing;
- and
- wherein the elastic core member comprises a widening proximal to the local flexing portion, wherein the widening increases the elastic core member diameter from a third diameter proximal to the widening to a fourth diameter greater than the third diameter distal to the widening.
3 more elements
A kit comprising:
- a guidewire comprising a guidewire body having a guidewire proximal segment, a tip segment and a guidewire intermediate segment extending between the guidewire proximal segment and the tip segment;
- and
- a needle comprising a beveled opening distally adjacent to a distal needle tip;
- wherein resistance to bending of the guidewire intermediate segment along at least most of the length thereof is smaller than resistance to bending along at least most of the length of the guidewire proximal segment;
- wherein the tip segment includes a local flexing portion having resistance to bending smaller than (1) the resistance to bending of the guidewire intermediate segment, (2) of a front portion of the tip segment extending to distally from the local flexing portion, and (3) of a rear portion of the tip segment extending proximally from the local flexing portion, thereby affecting localized elastic articulatability of the front portion of the tip segment relative to the rear portion of the tip segment and/or to the guidewire intermediate segment;
- wherein the beveled opening has a length configured such that when the front portion of the tip segment is pushed against a blood vessel wall, the front portion is configured to articulate about the local flexing portion upon axial protrusion from the beveled opening.
3 more elements
A guidewire for transluminal routing of artifacts in a blood vessel, comprising:
- a guidewire body comprising a guidewire proximal segment, a tip segment and a guidewire intermediate segment extending between the guidewire proximal segment and the tip segment;
- wherein resistance to bending of the guidewire intermediate segment along at least most of the length thereof is smaller than resistance to bending along at least most of the length of the guidewire proximal segment;
- wherein the tip segment includes a local flexing portion having resistance to bending smaller than the resistance to bending of (1) the guidewire intermediate segment, (2) of a front portion of the tip segment extending to distally from the local flexing portion, and (3) of a rear portion of the tip segment extending proximally from the local flexing portion, thereby affecting localized elastic articulatability of the front portion of the tip segment relative to the rear portion of the tip segment and/or to the guidewire intermediate segment;
- wherein the resistance to bending of the local flexing portion is smaller than resistance to penetration of a wall of the blood vessel with the tip segment when the front portion of the tip segment and the rear portion of the tip segment are aligned, and/or
- wherein the resistance to bending of the local flexing portion is greater than a resistance to buckling of the rear portion of the tip segment when the front and the rear portions of the tip segment form a minimally allowed articulation angle therebetween.
2 more elements
Dependencies are inferred from the claim text.