Frequency-Doubled Nd : YAG
Laser Photocoagulation for Stage III Plus Retinopathy of Prematurity
Adisak Trinavarat M.D.
Jutalai Tanterdtham M.D.
Chakrapong Namatra M.D.
Apichart Singalavanija M.D.
Nuttawut Rodanant M.D.
ABSTRACT Objective : To evaluate the outcome of treatment for stage III Plus ROP using frequency-doubled
Nd : YAG laser photocoagulation (532 mm. wavelength).
Method : A retrospective
study of ROP cases treated with this laser via indirect ophthalmoscope who
were followed up for at least 3 months between December, 1996 and May, 1998
was conducted.
Patient : Twenty four
eyes of 12 infants with gestational age of 26-35 (29.2 ± 2.57) weeks
and birth weight of 720-1,650 (1,050 ± 305) grams were evaluated.
Results : All eyes
were treated within one week after detection of stage III plus. The follow-up
period ranged from 4 to 17 months (11.5 ± 4.07 months). Regression
of the retinopathy was found in 22 eyes after single treatment while two
eyes required another session of treatment. Mean of the regression time
was 3.916 ± 1.64 (2-8) weeks. Nineteen eyes showed normal posterior
poles. Two had abnormal angulation of temporal vessels. Other two had macular
heterotropia and one eye was found to have peripheral vitreous hemorrhage.
No evidence of any visually significant complication from laser treatment
was found.
Conclusion : The results
suggest that frequency-doubled Nd : YAG laser can be an alternative for
the treatment of ROP.
Thai J Ophthalmol
1999 ; January-June 13(1) : 17-21.
Key word Retinopathy
of Prematurity, Frequency-doubled Nd : YAG laser.
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