Catheter guidewire with varying radiopacity
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United States of America Patent
Stats
-
Nov 12, 1991
Issued Date -
N/A
app pub date -
Jan 18, 1991
filing date -
Apr 27, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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