The Role of Intraoperative Bevacizumab for Prevention of Postoperative Vitreous Hemorrhage in Diabetic Vitreous Hemorrhage

Abstract

To assess the effect of intravitreal bevacizumab (IVB) on the incidence of postoperative recurrent vitreous hemorrhage (VH) in eyes operated for diabetic VH when injected at the end of the surgery. A prospective, comparative clinical trial was conducted on a consecutive series of patients requiring vitrectomy for diabetic nonclearing VH. Intravitreal bevacizumab (2.5 mg/0.1 mL) was injected at the completion of surgery. Patients underwent best-corrected visual acuity (VA), applanation tonometry, and biomicroscopic anterior and posterior segment evaluation for VH grading. Postoperative visits were performed at the first day, first week, first month, third month, and sixth month. The VH was graded at each visit, and the rate of postoperative VH and VA improvement and potential complications were evaluated and compared between the groups. A total of 72 eyes of 66 patients were included. Thirty-four eyes were enrolled in the IVB group and 38 eyes were enrolled in the control group. The rate of postoperative VH did not differ significantly between the groups at any postoperative visit (p>0.05). Three eyes (8.8%) in the IVB group and 5 eyes (13.1%) in the control group had postoperative VH throughout the follow-up period and only one eye from each group underwent a second surgery. Postoperative VA significantly increased in both groups but did not differ significantly between the groups at any postoperative visit (p>0.05). Intravitreal bevacizumab does not seem to have any beneficial effect on the incidence of postoperative VH in eyes operated for diabetic VH when injected at the end of surgery.