title: Expanded indications for 25-gauge transconjunctival vitrectomy.
abstract: OBJECTIVE
  We conducted 25-gauge (25G) transconjunctival vitrectomy to treat patients with various ocular diseases, and examined the possibility of expanding the indications for this system through combined use with 20G devices when needed.
  
  
  METHODS
  The records of 167 patients (169 eyes) who underwent vitrectomy in our hospital between April and June 2004 were studied. Vitrectomy had been conducted using the 20G or 25G transconjunctival vitrectomy system.
  
  
  RESULTS
  In 7 of the 169 eyes (4%), the 20G system was initially selected. Vitrectomy could be performed using the 25G system alone in 150 eyes (89%), while 20G devices were used in combination with the 25G system in 12 (7%). None of the 25G scleral wounds were sutured, while all the 20G scleral wounds were sutured at the completion of surgery. Low intraocular tension was noted in 15 of 162 eyes (9%), but all these eyes recovered within 2 to 4 days. In two eyes with macular hole, retinal detachment occurred, but reattachment was achieved after reoperation. No extensive vitreoretinal hemorrhage or postoperative infection was observed.
  
  
  CONCLUSIONS
  By combining the use of 20G devices, indications for the 25G system can be expanded. However, postoperative low ocular tension must be addressed by carefully considering surgical indications and prevention measures.
authors.affiliation: Department of Ophthalmology, School of Medicine, Nihon University, Tokyo, Japan. sshimada@olive.ocn.ne.jp
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Shimada
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Nakashizuka
authors.forename: Ryuzaburo
authors.initials: R
authors.lastname: Mori
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Mizutani
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003228:Conjunctiva; D005260:Female; D006801:Humans; D007429:Intraocular Pressure; D008297:Male; D008875:Middle Aged; D009339:Needles; D012086:Reoperation; D012164:Retinal Diseases / Q000601:surgery; D012827:Silicone Oils / Q000008:administration & dosage; D013459:Sulfur Hexafluoride / Q000008:administration & dosage; D013536:Suture Techniques; D014821:Vitrectomy / Q000379:methods*
chemical_list: D012827:Silicone Oils; D013459:Sulfur Hexafluoride