Claims
- 1. A guide wire for being extended into a vascular vessel comprising:
- a. a distal tip, an axially elongated main wire having a distal end portion and an axially elongated cylindrical portion that is of a substantially greater axial length than the wire distal end portion, and axially elongated spring coil means having an inner peripheral wall the coil means having a distal and a proximal end portion, including a first helically wound coil having a coil central axis;
- b. a second helically wound flexible coil wound in an opposite direction with adjacent convolutions in contact and in an interfering fit relationship with said first helically wound coil such that the inner and outer diameters of said first helically wound coil are consistent along the full length of said first helically wound coil, and the inner and outer diameters of said second coil are consistent along the full length of said second coil from a distal end to a proximal end, each of the helices of said first and second coils having substantially the same radial spacing from said coil central axis for control of said coils; and
- c. said first helically wound coil has an outer diameter Z, and said second helically wound coil has an inner diameter X, such that in a non-assembled condition, Z is about 0.002 inches greater than X.
- 2. The guidewire of claim 1, further comprising a safety ribbon within said coil means radially adjacent to said inner peripheral wall.
- 3. The guidewire of claim 1, wherein said safety ribbon has a distal and proximal end, and said distal end thereof is joined to said distal tip.
RELATED APPLICATION
This application is a continuation-in-part application of Ser. No. 102,878, filed Sep. 30, 1987 now abandoned.
US Referenced Citations (11)
Foreign Referenced Citations (3)
Number |
Date |
Country |
0274412 |
Jan 1988 |
EPX |
3420740A1 |
Jan 1985 |
DEX |
2142944 |
Jan 1985 |
GBX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
102878 |
Sep 1987 |
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