Frequency of retinal re-detachment after removal of silicone oil Tamponade in cases of proliferative vitreoretinopathy

Objective: To determine the frequency of retinal re-detachment (reRD) following silicone oil removal (SOR) in patients who had undergone pars planavitrectomy for treatment of Proliferative vitreoretinopathy (PVR) detachment. Methods: A total of fifty (50) patients with diagnosis of PVR in LRBT hospital Lahore were selected within a duration of 12 months from April-2018 to April-2019 for this prospective observational study. Patients of rhegmatogenous retinal detachment (RD) who underwent vitrectomy using temporary SO tamponade and had completely attached retina at the time of SOR, were included. SOR was done via 3 ports pars plana vitrectomy (PPV) using EVA DORC machine. In 20 patients, scleral buckling (SB) was also done alongwith vitrectomy procedure. After SOR all patients were followed up for 6 months to determine the frequency of retinal re-detachment. Results: There was male pre-dominance with 30 (60%) of total proportion. There were 26 (52%) patients who had a grade C PVR (C1), 18 (32%) had grade B PVR. The retinal re-detachment was found in 2 (4.0%) patients out of 50 patients. In comparison of retinal re-detachment, there was no case of retinal redetachment in patients with SB and re-detachment occurred in 2 (6.6%) out of 30 patients in whom SB was not done (p-value 0.51). Conclusion:The rate of retinal re-detachment after silicone oil removal (SOR) was 4.0%. Implantation of SB at the time of PPV is associated with lower risk of retinal re-detachment after vitrectomy in patients of Proliferative vitreoretinopathy (PVR).