title: Comparison of intraoperative complications of phacoemulsification between sequential and combined procedures of pars plana vitrectomy and cataract surgery.
abstract: OBJECTIVE
  To compare intraoperative complications during phacoemulsification between sequential and combined procedures of vitrectomy and cataract surgery.
  
  
  METHODS
  We retrospectively reviewed the medical records of 54 patients who underwent cataract surgery in a previously vitrectomized eye (sequential group) and 311 patients who underwent combined vitrectomy and cataract surgery (combined group). Primary outcome measures were intraoperative complications during phacoemulsification. Secondary measures were preoperative and intraoperative cataract gradings.
  
  
  RESULTS
  The most common complication during phacoemulsification was posterior capsule rupture. The rate of posterior capsule rupture was higher in the sequential group (6 eyes, 11.4%) than in the combined group (14 eyes 4.5%, P = 0.049). Preoperative lens density (nuclear color and posterior subcapsular scores) was higher in the sequential group (P < 0.001). Intraoperative nuclear grading was higher compared with the preoperative one in the sequential group, but the two gradings did not differ in the combined group.
  
  
  CONCLUSIONS
  Phacoemulsification in a vitrectomized eye is associated with a higher rate of posterior capsule rupture than the one in combined vitrectomy. These results may have been caused by hard nucleus cataract in a vitrectomized eye.
authors.affiliation: Department of Ophthalmology, Gachon University Gil Hospital, Incheon, Korea.
authors.forename: Jong Yeon
authors.initials: JY
authors.lastname: Lee
authors.forename: Kyun-Hyung
authors.initials: KH
authors.lastname: Kim
authors.forename: Kwang Hoon
authors.initials: KH
authors.lastname: Shin
authors.forename: Dae Heon
authors.initials: DH
authors.lastname: Han
authors.forename: Dae Young
authors.initials: DY
authors.lastname: Lee
authors.forename: Dong Heun
authors.initials: DH
authors.lastname: Nam
mesh_terms: D002386:Cataract / Q000145:classification / Q000150:complications; D005260:Female; D006801:Humans; D007431:Intraoperative Complications; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification / Q000379:methods*; D057851:Posterior Capsular Rupture, Ocular / Q000209:etiology; D012164:Retinal Diseases / Q000150:complications; D012189:Retrospective Studies; D014821:Vitrectomy / Q000379:methods*; D057586:Vitreoretinal Surgery; D014823:Vitreous Hemorrhage / Q000150:complications