title: [Clinical analysis of intraocular pressure elevation following vitreoretinal surgery].
abstract: OBJECTIVE
  To study the incidence and risk factors of intraocular pressure (IOP) elevation in patients who underwent vitreoretinal surgery.
  
  
  METHODS
  Data for 422 patients (446 eyes) who underwent vitreoretinal surgery from June 2005 to June 2007 were retrospectively analyzed. IOP was measured before surgery and on day 1, 2, 3, 7-14 after surgery with Goldmann applanation tonometer. Ocular hypertension was defined as IOP 25 mmHg or more. All factors were analyzed for association with Ocular hypertension.
  
  
  RESULTS
  232 of the 422 patients were female. 190 were male. The IOP was elevated significantly in 185 eyes (41%) after surgery within 2 weeks. Among them the IOP occurred mostly in day 1 (152 eyes, 82%). The rate of IOP elevation with intraocular tamponade of C3F8 or silicone oil was 53% or 55%, the difference being not statistically significant (P>0.05). The incidence of high IOP in C3F8 injection group and silicone oil injection group were statistically higher than simple pars plana vitrectomy group (P<0.01). The risk factors of ocular hypertension include C3F8 injection (chi2=37.82, P<0.01), silicone oil injection (chi2=27.84, P<0.01), lentectomy (chi2=8.98, P<0.01), scatter endolaser (chi2=7.41, P<0.01), diabetes (chi2=12.12, P<0.01) and increasing patient age (chi2=7.07, P<0.01).
  
  
  CONCLUSIONS
  IOP elevation was a common complication of vitreoretinal surgery. The risk factors of ocular hypertension include C3F8 injection, silicone oil injection, lentectomy, scatter endolaser, diabetes and increasing patient age.
authors: Department of Ophthalmology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China.
authors: Wei-jing
authors: WJ
authors: Chao
authors: Su-bing
authors: SB
authors: Liu
authors: Rong-ping
authors: RP
authors: Dai
authors: Wei-hong
authors: WH
authors: Yu
authors: Zhi-qiao
authors: ZQ
authors: Zhang
authors: Xiao
authors: X
authors: Zhang
authors: Fang-tian
authors: FT
authors: Dong
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D015994:Incidence; D007429:Intraocular Pressure; D008297:Male; D008875:Middle Aged; D009798:Ocular Hypertension / Q000209:etiology*; D011183:Postoperative Complications / Q000209:etiology*; D012160:Retina / Q000601:surgery; D012307:Risk Factors; D014821:Vitrectomy / Q000009:adverse effects*; D014822:Vitreous Body / Q000601:surgery; D055815:Young Adult