title: A simple modification to the 25-gauge trocar and cannula system for retinopathy of prematurity related lens-sparing vitrectomy.
abstract: BACKGROUND
  Recently, 25-gauge vitrectomy has become more popular. However, most still perform the surgery in pediatric patients without the use of the trocars and cannulas as in adult vitrectomies.
  
  
  METHODS
  We described a simple modification using adult 25-gauge cannulas and 270-silicone watzke sleeves, enabling these instruments to be used in pediatric cases. The sleeve is cut into segments of 2 mm in length, and then introduced up the shaft of the 25-gauge trocar. One is introduced first, and a second one is introduced on top of the first one. This secures the two sleeves on the shaft of the trocar, such that they act as a spacer. The effective shaft of the trocar was then reduced to 2 mm in length.
  
  
  RESULTS
  This method enabled successful surgery in two cases.
  
  
  CONCLUSIONS
  This allows the adaptation of the standard 25-gauge system for pediatric cases with only the slightest modification needed.
authors.affiliation: Department of Ophthalmology, LKS Faculty of Medicine, The University of Hong Kong, Room 301, Level 3, Block B, Cyberport 4, Pokfulam, Hong Kong. ianyhwong@gmail.com.
authors.forename: Ian Y
authors.initials: IY
authors.lastname: Wong
authors.affiliation: Department of Ophthalmology, LKS Faculty of Medicine, The University of Hong Kong, Room 301, Level 3, Block B, Cyberport 4, Pokfulam, Hong Kong.
authors.forename: Lawrence P
authors.initials: LP
authors.lastname: Iu
authors.affiliation: Department of Ophthalmology, LKS Faculty of Medicine, The University of Hong Kong, Room 301, Level 3, Block B, Cyberport 4, Pokfulam, Hong Kong.
authors.forename: Connie H
authors.initials: CH
authors.lastname: Lai
mesh_terms: D057785:Catheters; D004867:Equipment Design; D006801:Humans; D012178:Retinopathy of Prematurity / Q000601:surgery*; D013525:Surgical Instruments; D014821:Vitrectomy / Q000295:instrumentation*