Analysis on factors influencing for results of laser treatment of zone one retinopathy of premature

Abstract

Objective To observe the factors influencing for results of laser treatment of zone one retinopathy of premature(ROP).Methods The clinical data of 35 patients(69 eyes)with ROP in zone one who diagnosed by examination of indirect ophthalmoscopy were retrospectively analyzed.The eyes were divided into anterior zone one(49 eyes)and posterior zone one(20 eyes).The 69 eyes,aggressive posterior ROP(AP-ROP)in 12 eyes,anterior zone one in four eyes and posterior zone one in eight eyes.The laser photocoagulation of diode indirect ophthalmoscopy with+20 D lens and sclera compressor were used to entire avascular retina.Follow-up ranged from two to 48 months with the mean of(10.85±11.35)months.Take the cristae fadeaway and stable condition as cure;retinopathy proceed to the stage 4 and 5 ROP as retinopathy progress.Results Forty-two out of 69 eyes(60.87%)were cured and retinopathy progress in 27 eyes(39.13%).Thirty-four out of 49 eyes(69.38%)with anterior zone one were cured and retinopathy progress in 15 eyes(30.61%);eight out of 20 eyes(40.00%)with posterior zone one were cured and retinopathy progress in 12 eyes(60.00%).The difference of progress rate between anterior and posterior zone one was statistically significant(X~2=5.15,P<0.05).Conclusions Laser photocoagulation is effective for treatment of zone one ROP,the prognosis of anterior zone one is better than posterior zone one;retinopathy progress after photocoagulation was associated with extent of fibrovascular organization. Key words: Retinopathy of prematurity/therapy; Laser coagulation; Lasers,semiconductor/therapeutic use; Retinopathy of prematurity/complications