CO sub 2 Laser Micromanipulator Parallax Error Resolved.
Abstract
Most current C02 laser micromanipulators for microlaryngoscopy experience the parallax aiming problem. This occurs when the beam mirror is offset below the optical path for the microscope, making use of the laser difficult through small laryngoscopes or in pediatric patients. The newer 'hot mirror technology' micromanipulators that are now available overcome this problem. In addition to providing a laser beam coincident with the optical path, the newer units offer much smaller spot sizes (250-micron diameter at 400-mm focal length), but all partially absorb some of the light available for illumination. To quantitate this, optical absorption spectra were determined for five 'hot mirrors'. Clinical experience with more than 100 cases has demonstrated the advantages of these new mirrors to minimize mucosal thermal damage and give improved exposure for subglottic and pediatric laryngoscopy.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 31, 1991
- Accession Number
- ADA302758
Entities
People
- Jay A. Werkhaven
- Jerri A. Tribble
- Robert H. Ossoff
Organizations
- Vanderbilt University