title: Ahmed glaucoma valve in post-penetrating-keratoplasty glaucoma: a critically evaluated prospective clinical study.
abstract: OBJECTIVE
  The aim was to evaluate the outcome of Ahmed glaucoma valve (AGV) in post-penetrating-keratoplasty glaucoma (PKPG).
  
  
  METHODS
  In this prospective study, 20 eyes of 20 adult patients with post-PKPG with intraocular pressure (IOP) >21 mmHg, on two or more antiglaucoma medications, underwent AG (model FP7) implantation and were followed up for a minimum of 6 months. Absolute success was defined as 5 < IOP < 21 mmHg and qualified success as 5 < IOP < 21 mmHg with medications or minor procedures.
  
  
  RESULTS
  The mean IOP decreased from 42.95 ± 10.24 to 17.69 ± 3.64 mmHg (P < 0.001) and the use of medications dropped from 2.92 to 0.39 (P < 0.001) after AGV implantation. The absolute success was achieved in 11 eyes and qualified success in 9. There was no significant change in best corrected visual acuity, graft clarity, or graft thickness. Six device-related complications occurred after AGV implantations which were successfully managed with medical or minor surgical therapy.
  
  
  CONCLUSIONS
  Postkeratoplasty refractory glaucoma managed by AGV implantation revealed a satisfactory outcome up to 6 months of follow-up.
authors.affiliation: Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India. anitap49@yahoo.com
authors.forename: Anita
authors.initials: A
authors.lastname: Panda
authors.forename: Vadivelu Jaya
authors.initials: VJ
authors.lastname: Prakash
authors.forename: Tanuj
authors.initials: T
authors.lastname: Dada
authors.forename: Anoop Kishore
authors.initials: AK
authors.lastname: Gupta
authors.forename: Sudarshan
authors.initials: S
authors.lastname: Khokhar
authors.forename: Murugesan
authors.initials: M
authors.lastname: Vanathi
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D005500:Follow-Up Studies; D005901:Glaucoma / Q000175:diagnosis / Q000209:etiology* / Q000503:physiopathology / Q000601:surgery*; D020327:Glaucoma Drainage Implants / Q000009:adverse effects / Q000592:standards; D006801:Humans; D007429:Intraocular Pressure; D015948:Keratoplasty, Penetrating / Q000009:adverse effects*; D008297:Male; D033401:Microscopy, Acoustic; D008875:Middle Aged; D011446:Prospective Studies; D016896:Treatment Outcome; D055815:Young Adult