title: Phacoemulsification versus phacoemulsification with micro-bypass stent implantation in primary open-angle glaucoma: randomized double-masked clinical trial.
abstract: OBJECTIVE
  To compare phacoemulsification alone and phacoemulsification with micro-bypass stent implantation in eyes with primary open-angle glaucoma.
  
  
  METHODS
  Instituto di Fisiopatologia Clinica, Clinica Oculistica, Universita' di Torino, Torino, Italy.
  
  
  METHODS
  In this prospective double-masked randomized clinical trial, patients had phacoemulsification alone (control group) or phacoemulsification with iStent implantation (combined group). Primary outcomes were intraocular pressure (IOP) and reduction in medication use over 15 months and IOP after a 1-month washout of ocular hypotensive agents (ie, 16 months postoperatively).
  
  
  RESULTS
  The baseline IOP was similar between groups (combined group: 17.9 mm Hg +/- 2.6 [SD]; control group: 17.3 +/- 3.0 mm Hg) (P = .512). Three patients in the control group were lost to follow-up. The mean IOP was 14.8 +/- 1.2 mm Hg in the combined group and 15.7 +/- 1.1 mm Hg in the control group at 15 months and 16.6 +/- 3.1 mm Hg and 19.2 +/- 3.5 mm Hg, respectively, after washout; the IOP was statistically significantly lower in the combined group than in the control group at both time points (P = .031 and P = .042, respectively). At 15 months, the mean number of medications was lower in the combined group than in the control group (0.4 +/- 0.7 and 1.3 +/- 1.0, respectively; P = .007), as was the proportion of patients on ocular hypotensive medication (33% and 76%, respectively).
  
  
  CONCLUSIONS
  Phacoemulsification with stent implantation was more effective in controlling IOP than phacoemulsification alone; the safety profiles were similar.
authors.affiliation: Instituto di Fisiopatologia Clinica, Clinica Oculistica, Universita' di Torino, Via Juvarra 19,10100 Torino, Italy. antoniofea@interfree.it
authors.forename: Antonio M
authors.initials: AM
authors.lastname: Fea
mesh_terms: D000368:Aged; D000959:Antihypertensive Agents / Q000008:administration & dosage; D002386:Cataract / Q000150:complications; D004311:Double-Blind Method; D005260:Female; D020327:Glaucoma Drainage Implants; D005902:Glaucoma, Open-Angle / Q000188:drug therapy / Q000503:physiopathology / Q000601:surgery*; D006068:Gonioscopy; D006801:Humans; D007429:Intraocular Pressure / Q000502:physiology; D019654:Lens Implantation, Intraocular; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification / Q000379:methods*; D011446:Prospective Studies; D015607:Stents; D014065:Tonometry, Ocular; D014792:Visual Acuity / Q000502:physiology
chemical_list: D000959:Antihypertensive Agents