Comparison on effects between conventional and super panretinal photocoagulation combined with vitrectomy on diabetic retinopathy

Abstract

Objective To discuss the effects of conventional and super panretinal photocoagulation (PRP) combined with vitrectomy on diabetic retinopathy (DR). Methods One hundred DR patients in Yuncheng Central Hospital from January 2016 to February 2018 were enrolled in the study and were divided into two groups according to the random number table method, with 50 cases in each group. All patients were treated by PRP plus vitrectomy, while patients in control group received conventional PRP, and patients in observation group received super PRP treatment. After 6 months of follow-up, the best corrected visual acuity (BCVA), macular edema and complications were compared between the two groups at 1, 4 and 12 weeks after operation. Results There was no significant difference in BCVA level between observation group and control group at any time points after treatment (P>0.05). The incidences of macular edema were not significantly different between the two groups (P>0.05). But the time of macular edema disappeared in observation group was shorter than that in control group (P<0.05). The incidences of retinal instillation, retinal vascular leakage, retinal vascular leakage, posterior polar hemorrhage, and hard exudation in the posterior pole in observation group were noticeable lower than those in control group (P<0.05). None sever complication occurred after operation in the two groups; one patient had choroidal effusion and was healed after proper treatment in observation group. Conclusions Super PRP and conventional PRP both can improve the visual acuity of patients with DR, but the former can be considered as first choice for better curative effect on retinal vascular leakage, retinal instillation and disc leakage. The operator should master the number of light spots and laser energy in the treatment to improve the safety of treatment. Key words: Diabetic retinopathy; Retinal laser photocoagulation; Vitrectomy