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KMID : 0213520170310020102
Korean Journal of Ophthalmology
2017 Volume.31 No. 2 p.102 ~ p.107
Analgesic Effect of Topical Sodium Diclofenac before Retinal Photocoagulation for Diabetic Retinopathy: A Randomized Double-masked Placebo-controlled Intraindividual Crossover Clinical Trial
Ramezani Alireza

Entezari Morteza
Shahbazi Mohammad Mehdi
Semnani Yosef
Nikkhah Homayoun
Yaseri Mehdi
Abstract
Purpose: To evaluate the analgesic effect of topical sodium diclofenac 0.1% before retinal laser photocoagulation for diabetic retinopathy.

Methods: Diabetic patients who were candidates for peripheral laser photocoagulation were included in a randomized, placebo-controlled, intraindividual, two-period, and crossover clinical trial. At the first session and based on randomization, one eye received topical sodium diclofenac 0.1% and the other eye received an artificial tear drop (as placebo) three times before laser treatment. At the second session, eyes were given the alternate drug. Patients scored their pain using visual analogue scale (max, 10 cm) at both sessions. Patients and the surgeon were blinded to the drops given. Difference of pain level was the main outcome measure.

Results: A total of 200 eyes of 100 patients were enrolled. Both treatments were matched regarding the applied laser. Pain sensation based on visual analogue scale was 5.6 ¡¾ 3.0 in the treated group and 5.5 ¡¾ 3.0 in the control group. The calculated treatment effect was 0.15 (95% confidence interval, ?0.27 to 0.58; p = 0.486). The estimated period effect was 0.24 (p = 0.530) and the carryover effect was not significant (p = 0.283).

Conclusions: Pretreatment with topical sodium diclofenac 0.1% does not have any analgesic effect during peripheral retinal laser photocoagulation in diabetic patients.
KEYWORD
Analgesic effect, Diabetic retinopathy, Laser photocoagulation, Topical sodium diclofenac
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