Catheter guidewire with varying radiopacity
First Claim
1. A guidewire for use with a catheter comprising:
- an elongate flexible shaft;
an outer helical coil mounted to and about the distal portion of the shaft, the distal tip of the outer coil extending distally beyond the distal tip of the shaft;
a smoothly rounded outer tip member attached to the distal end of the outer coil;
an inner helical coil contained within the distal end of the outer coil, the inner coil being attached at its proximal end to the distal end of the shaft and, at its distal end to the tip member;
both of said coils being formed from a highly radiopaque material;
the outer coil being formed from wire that is of lesser thickness, measured in a radial direction from the center of the coil than that of the wire from which the inner coil is formed.
2 Assignments
0 Petitions
Accused Products
Abstract
A guidewire for use with a catheter has varying radiopacity at its distal end. The guidewire includes a shaft having an outer helical coil attached to the distal region of the shaft, the coil extending distally beyond the distal end of the shaft and terminating in a tip weld. The outer coil is formed from a small diameter highly radiopaque wire. A smaller diameter inner helical coil, formed from a larger diameter highly radiopaque wire is disposed within the outer coil and is attached at its proximal end to the distal end of the shaft and at its distal end to the tip weld. The guidewire thus defines an arrangement which when viewed fluoroscopically will have a highly radiopaque distal portion and a moderately radiopaque proximal portion.
174 Citations
16 Claims
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1. A guidewire for use with a catheter comprising:
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an elongate flexible shaft; an outer helical coil mounted to and about the distal portion of the shaft, the distal tip of the outer coil extending distally beyond the distal tip of the shaft; a smoothly rounded outer tip member attached to the distal end of the outer coil; an inner helical coil contained within the distal end of the outer coil, the inner coil being attached at its proximal end to the distal end of the shaft and, at its distal end to the tip member; both of said coils being formed from a highly radiopaque material; the outer coil being formed from wire that is of lesser thickness, measured in a radial direction from the center of the coil than that of the wire from which the inner coil is formed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification