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V. Russo, I. U. Scott, A. Stella, G. Querques, F. Prascina, C. Iaculli, V. Primavera, A. Cosma, F. Balducci, N. Delle Noci; Non-Penetrating Deep Sclerectomy With SK-GEL® Implant versus Punch Trabeculectomy: Four Years of Follow Up. Invest. Ophthalmol. Vis. Sci. 2007;48(13):815.
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To compare the intraocular pressure-lowering effect and complication rate of non-penetrating deep sclerectomy (NPDS) with SK-GEL® implant versus punch trabeculectomy (PT) in the management of primary open angle glaucoma (POAG).
74 patients with POAG refractory to maximal tolerated medical therapy: group 1 included 43 eyes (33 patients) which underwent NPDS with reticulated hyaluronic acid (SK-GEL®) scleral implant; Group 2 included 50 eyes (41 patients) which underwent PT. Study follow-up evaluations conducted at 36 and 48 months post-procedure included best-corrected visual acuity, IOP, slit-lamp and dilated funduscopic examinations.
In terms of IOP control, at 36 months post-procedure, the proportion of eyes which achieved complete success was 25/33 (75.7%) in the NPDS group compared with 30/41 (73.1%) in the PT group (p=0.602). At 48 months post-procedure, the proportion of eyes which achieved complete success was 17/33 (51.5%) in the NPDS group compared with 29/41 (70.7%) in the PT group (p<0.05).
The IOP-lowering effects of the two procedures were comparable at 36 months, while at 48 months punch trabeculectomy was associated with a significantly higher rate of complete success compared with deep sclerectomy.
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