Clinical research of EX-PRESS drainage device and modified trabeculectomy combined with intravitreal conbercept treatment for neovascular glaucoma

AIM:To evaluate the efficacy and safety of modified trabeculectomy(experimental group) and implantation of EX-PRESS drainage device(control group),combined with intravitreal conbercept injection for neovascular glaucoma(NVG).METHODS:Totally 30 patients with NVG were selected from June 2014 to June 2017,and randomly divided into experimental group and control group.All patients were underwent intravitreal conbercept(0.5 mg/0.05 mL) treatment before surgery.Modified trabeculectomy was performed in MT group,while EX-PRESS drainage device implantation was performed in EX group.The success rates,best corrected visual acuity(BCVA),intraocular pressure(IOP),filtering bleb and complications were observed and compared.RESULTS:The differences of success rate,BCVA and filtering bleb were not statistically significant 12mo after the surgery(P>0.05),however,the difference of IOP at 1d,1wk,1,3,and 6mo after surgery was statistically significant(F_(time)=390.64,P_(time)<0.0001) between two groups.The interactions between two groups in the given time showed no significant difference(F_(intergroup×time)=0.181,P_(intergroup×time)=0.57),and also there was no significant difference in IOP between the two groups(F=3.16,P=0.09).The results of pairwise comparison at each time point showed no significant difference in IOP between 1d and 1wk,3 and 6,3mo and 12mo after surgery(P>0.05),while the results at other time point indicate statistical differences(P<0.05).CONCLUSION:The modified trabeculectomy and the implantation of EX-PRESS drainage device have clinical application value in reducing IOP and postoperative complications of refractory NVG.