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Holmium-YAG laser surgery on experimental vitreous membranes
S Borirakchanyavat1, C A Puliafito, G H Kliman
1Department of Ophthalmology, Harvard Medical School, Boston, MA.
Abstract:
We used a pulsed holmium-YAG laser that emitted in the midinfrared (2.12 microns) to cut experimental vitreous membranes in rabbits via an intraocular fiberoptic delivery system. Thirty-five membranes were treated at distances of 0.5 to 3.8 mm from the retina. All of the membranes that were treated were transected or partially cut. In cases that were treated with the optical fiber encased in a retinal-shielding pick, membranes could be readily transected without retinal injury. Laser vitreous membrane cutting may offer the advantage of near-tractionless membrane segmentation. The combination of a moderately strong target tissue absorption and the ready availability of commercial optical fibers for transmission of 2.12-microns laser energy suggests that the holmium-YAG laser merits further investigation for this application.
Insights
A pulsed holmium-YAG laser effectively cut experimental vitreous membranes in rabbits. Using a specialized fiberoptic probe prevented retinal injury, suggesting laser vitreous membrane cutting is a promising technique.
Area of Science:
- Ophthalmology
- Biomedical Engineering
- Laser Surgery
Background:
- Vitreous membranes can cause vision impairment.
- Current surgical methods for vitreous membrane removal carry risks.
Purpose of the Study:
- To evaluate the efficacy and safety of a pulsed holmium-YAG laser for cutting experimental vitreous membranes in rabbits.
Main Methods:
- A pulsed holmium-YAG laser (2.12 microns) was delivered intraocularly via a fiberoptic system.
- Thirty-five experimental vitreous membranes in rabbits were treated at varying distances from the retina.
- A retinal-shielding pick was used with the optical fiber in some cases.
Main Results:
- All treated membranes were transected or partially cut.
- Transection was achieved without retinal injury when using the optical fiber with a retinal-shielding pick.
- The holmium-YAG laser demonstrated effective cutting of vitreous membranes.
Conclusions:
- Pulsed holmium-YAG laser technology shows potential for vitreous membrane cutting.
- The use of a retinal-shielding pick enhances safety by preventing retinal injury.
- This laser-based approach may offer near-tractionless membrane segmentation, a significant advantage in vitreous surgery.
