title: A new non-trocar system for 25-gauge transconjunctival pars plana vitrectomy.
abstract: OBJECTIVE
  To introduce a new non-trocar system for 25-gauge transconjunctival pars plana vitrectomy (PPV).
  
  
  METHODS
  Study of a new surgical instrument.
  
  
  METHODS
  This new non-trocar system for 25-gauge transconjunctival PPV consists of a contact lens ring featuring four projections containing 1.0-mm diameter holes located 3.0 mm from the ring edge, a wedge-shaped 25-gauge infusion cannula, and two plugs.
  
  
  RESULTS
  The ring is fixed with 7-0 silk sutures at the 3- and 9-o'clock positions on the limbus. Using the 25-gauge needle, three conjunctival and scleral incisions (n = 3) are made at the projection holes located inferotemporally, superonasally, and superotemporally. No intra- or postoperative complications were encountered in 14 patients treated by this non-trocar 25-gauge transconjunctival PPV.
  
  
  CONCLUSIONS
  Using the system introduced here, 25-gauge transconjunctival PPV can be performed without suturing sclerotomies and without intra- or postoperative complications.
authors.affiliation: Department of Ophthalmology, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyou-ku, Kyoto 602-0841, Japan. mtei@ophth.kpu-m.ac.jp
authors.forename: Mamoru
authors.initials: M
authors.lastname: Tei
authors.forename: Takasumi
authors.initials: T
authors.lastname: Shimamoto
authors.forename: Toru
authors.initials: T
authors.lastname: Yasuhara
authors.forename: Hideki
authors.initials: H
authors.lastname: Komori
authors.forename: Hideo
authors.initials: H
authors.lastname: Oda
authors.forename: Shigeru
authors.initials: S
authors.lastname: Kinoshita
mesh_terms: D003228:Conjunctiva / Q000601:surgery; D006801:Humans; D009339:Needles; D012599:Sclerostomy; D013525:Surgical Instruments; D014821:Vitrectomy / Q000295:instrumentation*