Prevalence and Risk Factors of Supra-Choroidal Hemorrhage due to Scleral Buckling for Rhegmatogenous Retinal Detachment in Rasoul-e-Akram Hospital During 1989-1998

Supra-Choroidal Hemorrhage(SCH) is a potentially serious complication of intra-ocular surgeries, including scleral buckling(SB) with several effects on surgical and visual outcome. The present retrospective case-control study was conducted to determine the prevalence and risk factors of SCH due to SB in Rasoul-e-Akram Hospital using medical records during 1989-1998. 504 eyes of 488 patients who underwent SB procedure for rhematogenous retinal detachment were evaluated. 161(33%) patients were female and 327(67%) were male with mean age of 43.1 ±20.9 years. SCH occurred during SB in 12 cases and the prevalence was 2.4%. Mean age of SCH group was significantly higher than that of controls(59.8, 42.7 P=0.004). History of SCH in the same or fellow eye was also significantly higher in SCH group (16.7%, 0.6% P=0.005) with odds ratio of 19.96. Sex, history of diabetes, hypertension, history of cerebrovascular accident, cardiopulmonary diseases or surgery, type of anesthesia, band usage and amount of myopia are the variables which were not statistically different between the two groups(P>0.05). Older age and history of SCH in the same or fellow eye are considered to be risk factors of SCH during SB.