title: A Novel Method of Extending Glaucoma Drainage Tube: "Tube-in-Tube" Technique.
abstract: OBJECTIVE
  To describe a new and simple technique of glaucoma tube extension that carries several advantages over previously described techniques.
  
  
  METHODS
  A retrospective noncomparative case series of 3 patients (1 adult and 2 pediatric cases) with glaucoma tube retraction managed by the "tube-in-tube" technique. The follow-up duration ranges from 1 month to 3 years.
  
  
  RESULTS
  Adequate tube position and length were seen in all cases throughout the follow-up period. No tube migration was seen. The intraocular pressures were significantly reduced and maintained in all cases. There was no visual loss as a result of the procedure.
  
  
  CONCLUSIONS
  This new "tube-in-tube" glaucoma drainage device tube extension technique is safe and simple to perform, and has many advantages over previously reported techniques. It can be used in both the adult and pediatric glaucoma population, and is not limited to the type of drainage implants.
authors.affiliation: *Queensland Eye Institute †Lady Cilento Children's Hospital, Brisbane, Qld, Australia ‡NIHR Biomedical Research Centre at Moorfields Eye Hospital NHS Foundation Trust & UCL Institute of Ophthalmology, London, UK.
authors.forename: Mark Yu-Ming
authors.initials: MY
authors.lastname: Chiang
authors.forename: Jayne E
authors.initials: JE
authors.lastname: Camuglia
authors.forename: Peng Tee
authors.initials: PT
authors.lastname: Khaw
mesh_terms: D002648:Child; D002675:Child, Preschool; D005901:Glaucoma / Q000601:surgery*; D020327:Glaucoma Drainage Implants; D006801:Humans; D006871:Hydrophthalmos / Q000601:surgery*; D007440:Intubation / Q000379:methods*; D008297:Male; D008875:Middle Aged; D017755:Prosthesis Fitting / Q000379:methods*; D019919:Prosthesis Implantation; D012189:Retrospective Studies