Primary vitrectomy is the preferred surgery over sclera buckle for management of stage 4 retinopathy of prematurity (ROP) because of improved instrumentation [1] and because it directly addresses the transvitreal traction. However, inducing a posterior vitreous detachment is almost impossible in these infants as the vitreous is a transparent thick gel and tightly adherent to the retina. Thus, surgical success in stage 4 ROP depends mainly on delaminating the posterior hyaloid as much as possible, thereby relieving the traction forces without creating an iatrogenic break. To view the vitreous during vitrectomy, triamcinolone acetonide (TA) has been used for adults [2,3]. We report our experience of TA-assisted vitrectomy for stage 4 ROP.
Report of casesWe carried out a retrospective review of four eyes with stage 4 ROP where we used TA as an adjunct for vitrectomy. Institutional review board approval was obtained and informed consent was taken from the parents. One eye had stage 4a ROP while three eyes had stage 4b ROP. Mean gestational age and birth weight were 27.3 weeks and 996 g, respectively. All except one with stage 4a ROP underwent additional lensectomy as traction was extending to the lens. The sclerotomies were made 1-1.5 mm from the limbus. Lens was spared in one case. After initial core vitrectomy, 0.03 ml of preservative-free TA was injected (Aurocort, Aurolab, Madurai, India). The excess drug was then washed out with active suction. The suspended particles adhered to the remaining vitreous gel and provided excellent contrast against the fundus. Because of this excellent contrast, in all cases, a posterior hyaloid detachment was induced partially in a well-ontrolled fashion without creating an iatrogenic break, either using a sharp pick (Video 1) or active suction (Video 2). Restaining with TA can be performed to confirm the removal of the posterior hyaloid.At mean follow-up of 13.5 months, the anatomical success rate was good for all four cases. The stage 4a case had normal anatomy of posterior pole and the stage 4b cases had disc dragging and residual posterior tractional retinal detachment; no glaucoma could be seen. The case with lens-sparing vitrectomy did not develop a cataract.Electronic supplementary material The online version of this article (