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[Transscleral infrared laser retinal photocoagulation experimental study under low visibility conditions].
- Source :
-
Arquivos brasileiros de oftalmologia [Arq Bras Oftalmol] 2008 May-Jun; Vol. 71 (3), pp. 342-7. - Publication Year :
- 2008
-
Abstract
- Purpose: Retinal photocoagulation under poor visualization condition is often required. Transscleral infrared laser can be used as an alternative to regular transpupillary treatment. Based upon retinographic measurements, we proposed to estimate the reproducibility as well as ocular wall permeability rate for this treatment. Our primary goal was to evaluate whether this technique can deliver adequate photocoagulation at predetermined parameters without direct retinal visualization.<br />Methods: In New Zealand pigmented rabbits, optimal transscleral infrared diode laser settings were administered to the right eye. With the same parameters, transpupillary photocoagulation was repeated in the left eye. Retinographic and clinical examinations were performed immediately and two months later.<br />Results: Ocular wall permeability rate varied between 58.95 and 63.87%. Average permeability using a power of 300 mW (63.14%) was found to be higher than that encountered before its enhancement up to 500 mW (59.11%), (P<0.05).<br />Conclusions: Setting parameters showed dose-response effect. No retinal hole or retinal detachment was noticed in any rabbit. Transscleral infrared photocoagulation appeared to be a reproducible and secure method in the experimental model.
- Subjects :
- Analysis of Variance
Animals
Dose-Response Relationship, Radiation
Laser Coagulation standards
Male
Models, Animal
Pupil radiation effects
Rabbits
Reproducibility of Results
Retina injuries
Retina pathology
Time Factors
Laser Coagulation methods
Retina radiation effects
Retina surgery
Sclera surgery
Vision, Ocular physiology
Subjects
Details
- Language :
- Portuguese
- ISSN :
- 0004-2749
- Volume :
- 71
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- Arquivos brasileiros de oftalmologia
- Publication Type :
- Academic Journal
- Accession number :
- 18641818
- Full Text :
- https://doi.org/10.1590/s0004-27492008000300007