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Optical coherence domain reflectometry guidewire

Patent ·
OSTI ID:873504
 [1];  [2];  [3];  [4]
  1. Livermore, CA
  2. Pleasanton, CA
  3. Danville, CA
  4. Moss Beach, CA
+ Show Author Affiliations

A guidewire with optical sensing capabilities is based on a multiplexed optical coherence domain reflectometer (OCDR), which allows it to sense location, thickness, and structure of the arterial walls or other intra-cavity regions as it travels through the body during minimally invasive medical procedures. This information will be used both to direct the guidewire through the body by detecting vascular junctions and to evaluate the nearby tissue. The guidewire contains multiple optical fibers which couple light from the proximal to distal end. Light from the fibers at the distal end of the guidewire is directed onto interior cavity walls via small diameter optics such as gradient index lenses and mirrored corner cubes. Both forward viewing and side viewing fibers can be included. The light reflected or scattered from the cavity walls is then collected by the fibers, which are multiplexed at the proximal end to the sample arm of an optical low coherence reflectometer. The guidewire can also be used in nonmedical applications.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA
DOE Contract Number:
W-7405-ENG-48
Assignee:
Regents of Universtiy of California (Oakland, CA)
Patent Number(s):
US 6175669
OSTI ID:
873504
Country of Publication:
United States
Language:
English

References (2)

Polarization-sensitive low-coherence reflectometer for birefringence characterization and ranging journal January 1992
Scanning single-mode fiber optic catheter–endoscope for optical coherence tomography journal January 1996

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