title: A novel surgical technique to prevent postoperative Ahmed valve tube exposure through conjunctiva: tenon advancement and duplication.
abstract: OBJECTIVE
  To present and evaluate a novel surgical technique to prevent exposure of the Ahmed valve implant tube (New World Medical, Rancho Cucamonga, CA) through conjunctiva in congenital glaucoma called "combined short scleral tunnel technique with Tenon advancement and duplication."
  
  
  METHODS
  Patients with failed previous congenital glaucoma surgeries were divided into two groups. In group 1, 32 eyes of 28 patients with a mean age of 8.82 +/- 5.39 years underwent classic Ahmed valve implant surgery. In group 2, 28 eyes of 24 patients with a mean age of 8.79 +/- 5.55 years underwent the novel combined short scleral tunnel with Tenon advancement and duplication technique.
  
  
  RESULTS
  After a mean 31.68 +/- 9.25 months of follow-up, conjunctival tube exposure was seen in 3 patients (9.4%) in group 1. There was no conjunctival tube exposure in group 2 after a mean 34.96 +/- 7.93 months of follow-up.
  
  
  CONCLUSIONS
  The combined short scleral tunnel with Tenon advancement and duplication technique is able to prevent conjunctival tube exposure after Ahmed valve implantation surgery in patients with congenital glaucoma.
authors.affiliation: Department of Ophthalmology, Istanbul University, Cerrahpasa School of Medicine, Istanbul, Turkey.
authors.forename: Nevbahar
authors.initials: N
authors.lastname: Tamçelik
authors.forename: Ahmet M
authors.initials: AM
authors.lastname: Sarici
authors.forename: Huseyin
authors.initials: H
authors.lastname: Yetik
authors.forename: Ahmet
authors.initials: A
authors.lastname: Ozkök
authors.forename: Abdullah
authors.initials: A
authors.lastname: Ozkiris
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D003228:Conjunctiva / Q000637:transplantation*; D005500:Follow-Up Studies; D005901:Glaucoma / Q000151:congenital / Q000601:surgery*; D020327:Glaucoma Drainage Implants; D006801:Humans; D007223:Infant; D007429:Intraocular Pressure; D011183:Postoperative Complications / Q000517:prevention & control*; D011475:Prosthesis Failure; D012307:Risk Factors; D013524:Surgical Flaps; D013997:Time Factors; D014130:Trabeculectomy / Q000379:methods*; D016896:Treatment Outcome; D014792:Visual Acuity; D055815:Young Adult