Fluoroscopically viewable multifilar calibrated guidewire and method of measuring occlusions with calibrated guidewires
US5465732A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1992 |
| Grant date | Nov 14, 1995 |
| Priority date | — |
| Expiry date | Mar 31, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/32
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A calibrated guidewire for use in determining the magnitude of arterial occlusions in the body and a method of using the guidewire. The guidewire includes a flexible sleeve having a distal end and a hemispherical tip having a flat inner surface. A multifilar flexible coil is disposed between the distal end of the sleeve and the tip. The coil has a uniform outer diameter and is formed by two sets of different wires, one of which is radiotransparent and the other of which is radiopaque. The spacings between each of the sets is identical and is defined by the widths of each of the sets to provide regularly spaced radiotransparent areas of indicia that are observable as a fluoroscopic image to enable the user measure of the magnitude of an occlusion in a tubular structure in the body. The multifilar construction extends the entire length of the coil between the sleeve and the tip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.