title: A bent infusion cannula for vitreous surgery.
abstract: OBJECTIVE
  To modify an infusion cannula for vitreous surgery and decrease cannula-related complications.
  
  
  METHODS
  New surgical instrument.
  
  
  METHODS
  A conventional 20-gauge infusion cannula was modified by forming a 135-degree angle at the joint of the flange between the cannula adapter and the needle. The sloped plane of the needle tip was opposite the bent adapter. The cannula was routinely fastened with a 7-0 absorbable suture after insertion into the eye.
  
  
  RESULTS
  We used the modified infusion cannula in 50 consecutive phakic eyes (48 patients). Intraoperatively, the cannula remained attached to the globe surface; it did not tilt anteriorly and damage the lens when touched inadvertently. No suprachoroidal or subretinal infusion was observed. Neither the lens nor the retina was damaged. There were no cannula-related retinal detachments or breaks during follow-up.
  
  
  CONCLUSIONS
  The modified infusion cannula is more effective and safer during pars plana vitrectomy in phakic eyes compared with a conventional cannula.
authors.affiliation: Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, People's Republic of China.
authors.forename: Wen
authors.initials: W
authors.lastname: Liu
authors.forename: Dan-Dan
authors.initials: DD
authors.lastname: Wang
authors.forename: Su-Ying
authors.initials: SY
authors.lastname: Huang
authors.forename: Jia-Qing
authors.initials: JQ
authors.lastname: Li
authors.forename: Su-Hong
authors.initials: SH
authors.lastname: Wu
authors.forename: Li
authors.initials: L
authors.lastname: Hang
mesh_terms: D002404:Catheterization / Q000295:instrumentation*; D004867:Equipment Design; D006801:Humans; D007431:Intraoperative Complications / Q000517:prevention & control; D014821:Vitrectomy / Q000295:instrumentation*; D014822:Vitreous Body / Q000601:surgery*