Efficacy and safety of combined Kahook Dual Blade goniotomy with phacoemulsification in Chinese patients with primary open angle glaucoma

AIM: To report the one-year surgical outcome Kahook Dual Blade goniotomy combined with phacoemulsification (KDB-Phaco) in Chinese patients with primary open angle glaucoma (POAG). METHODS: This is a retrospective study included 43 eyes of 28 Chinese POAG patients with cataract who accepted KDB-Phaco and followed-up for 12mo. Intraocular pressure (IOP), glaucoma medications and surgical complications were recorded. Success 1 and success 2 was defined as 5-21 mm Hg and 5-18 mm Hg, and success plus was determined if additional criteria of IOP reduction ≥20% from baseline was reached. A corrected IOP by adding 3 mm Hg for each medication was used to do correlation test. Cox's proportional hazards regression model was used to test the hazard ratio for factors associated with surgical success. RESULTS: After a 12-month follow up, the IOP decreased from 28.1±6.3 to 13.8±3.0 mm Hg (47.92% reduction, P