Catheter guidewire with varying radiopacity

Details Catheter guidewire with varying radiopacity Catheter guidewire with varying radiopacity

1991-01-18

1991-11-12

Yasko, John D.

Surgery

Truss

Pad

128772, 604170, A61B 600

Patent

active

050639358

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.

REFERENCES:
patent: 3749086 (1973-07-01), Kline et al.
patent: 4215703 (1980-08-01), Willson
patent: 4538622 (1985-09-01), Samson et al.
patent: 4545390 (1985-10-01), Leary
patent: 4577637 (1986-03-01), Mueller, Jr.
patent: 4619274 (1986-10-01), Morrison
patent: 4719924 (1988-01-01), Crittenden et al.
patent: 4748986 (1988-06-01), Morrison et al.
patent: 4763647 (1988-08-01), Gambale
Webster's II Dictionary, 1984, pp. 969, 970.

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