Patent ID: 11904117
Assignee: ABBOTT CARDIOVASCULAR SYSTEMS, INC.
Field: Medical technology (Instruments)
Classification: CPC A  B | IPC A  B

Claim 0:
1. A guidewire, comprising:
an elongated core member having a proximal core section, a distal core section, and a tapered segment tapering from a larger diameter to a smaller diameter moving from the proximal segment toward the distal segment, and the elongated core member having a proximal end configured to remain outside a patient's body and a distal end configured to be advanced into the vascular system of the patient;
a radiopaque inner coil having a distal end, a proximal end, a uniform outer diameter extending from the distal end to the proximal end of the radiopaque inner coil, and being disposed over the distal segment of the elongated core member;
a non-radiopaque outer coil having a distal end, a proximal end, a uniform inner diameter extending from the distal end to the proximal end of the radiopaque outer coil, and being disposed over the inner coil and the distal segment of the elongated core member;
a uniform-sized gap defined by the uniform outer diameter of the radiopaque inner coil and the uniform inner diameter of the non-radiopaque outer coil, wherein the uniform sized gap extends from the distal end to the proximal end of the radiopaque inner coil;
the distal end of the radiopaque inner coil and the distal end of the non-radiopaque outer coil being permanently attached to the distal end of the elongated core member by a solder ball;
the proximal end of the radiopaque inner coil being permanently attached to the elongated core member, but not connected to the non-radiopaque outer coil;
the proximal end of the non-radiopaque outer coil being attached to the elongated core member;
wherein the radiopaque inner coil contacts the elongated core member at least at the inner coil distal end and inner coil proximal end, and the radiopaque inner coil does not contact the non-radiopaque outer coil; and
wherein either or both of the radiopaque inner coil and the non-radiopaque outer coil has a non-circular cross-sectional shape.