title: A comparison of glaucoma drainage implant tube coverage.
abstract: OBJECTIVE
  Surgeons may use various materials, including donor sclera, dura, or pericardium grafts to cover glaucoma drainage implant tubes, prior to repositioning conjunctiva. We reviewed our experience with these materials.
  
  
  METHODS
  Sixty-four eyes with at least 24 months follow-up status post glaucoma drainage implant surgery were evaluated for signs of tube erosion, as well as patch graft thinning, after initial placement of donor sclera (23), dura (18), or pericardium (23) patch grafts.
  
  
  RESULTS
  Sixty-two eyes required no intervention for conjunctival and patch graft melting with subsequent tube erosion. Three cases (two eyes) of erosion requiring reoperation (1-dura at 6 months, 1-sclera at 15 months, and in the same eye 21 months later, 1-pericardium) were noted. Significant thinning of the donor patch graft such that the tube was visible beneath intact conjunctiva ocurred in 6 out of 23 donor sclera eyes, 4 out of 18 donor dura eyes, and 6 out of 23 donor pericardium eyes.
  
  
  CONCLUSIONS
  No material was more prone to melting than another. Donor sclera may be slightly more cost-efficient, but gamma-irradiated pericardium has sterility advantages.
authors.affiliation: Department of Ophthalmology, University of Florida College of Medicine, Gainesville, Florida 32610-0284, USA. mfsmith@eye1.eye.ufl.edu
authors.forename: M Fran
authors.initials: MF
authors.lastname: Smith
authors.forename: J William
authors.initials: JW
authors.lastname: Doyle
authors.forename: John W
authors.initials: JW
authors.lastname: Ticrney
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D004388:Dura Mater / Q000637:transplantation*; D005260:Female; D005901:Glaucoma / Q000601:surgery*; D020327:Glaucoma Drainage Implants; D006801:Humans; D008297:Male; D008875:Middle Aged; D010496:Pericardium / Q000637:transplantation*; D011183:Postoperative Complications; D019919:Prosthesis Implantation; D012086:Reoperation; D012590:Sclera / Q000637:transplantation*; D013524:Surgical Flaps; D016896:Treatment Outcome