title: Truncation of In Situ Baerveldt Glaucoma Drainage Device for Treatment of Late Persistent Postoperative Hypotony.
abstract: OBJECTIVE
  To describe a new technique to treat late persistent hypotony after Baerveldt glaucoma drainage device surgery.
  
  
  METHODS
  Review of 2 cases treated with in situ truncation of one or both wings of the Baerveldt device, combined with permanent but releasable tube occlusion.
  
  
  RESULTS
  Two eyes with persistent hypotony underwent in situ truncation of one or both wings of the Baerveldt device with resolution of hypotony. Recurrence of elevated intraocular pressure (IOP) in both cases required reversal of tube occlusion, after which the IOP has remained both well controlled and sufficiently elevated to avoid complications of hypotony over 13 and 43 months.
  
  
  CONCLUSIONS
  In situ truncation of Baerveldt drainage device with permanent, releasable tube occlusion offers a safe and effective intervention for eyes with late hypotony, and also allows for maintenance of IOP control long term.
authors.affiliation: Department of Ophthalmology, University of Washington, Seattle, WA.
authors.forename: Philip P
authors.initials: PP
authors.lastname: Chen
mesh_terms: D000328:Adult; D000369:Aged, 80 and over; D004322:Drainage / Q000295:instrumentation*; D005260:Female; D020327:Glaucoma Drainage Implants / Q000009:adverse effects*; D006801:Humans; D007429:Intraocular Pressure / Q000502:physiology; D015814:Ocular Hypotension / Q000209:etiology / Q000503:physiopathology / Q000601:surgery*; D011183:Postoperative Complications; D011184:Postoperative Period; D019919:Prosthesis Implantation; D012189:Retrospective Studies; D013536:Suture Techniques; D014792:Visual Acuity / Q000502:physiology