title: [Timing of vitrectomy for proliferative diabetic retinopathy in cases with type II diabetes mellitus].
abstract: OBJECTIVE
  To determine the timing of vitrectomy for proliferative diabetic retinopathy with severe vitreous hemorrhage, retinal traction and even tractional detachment resulted from fibrovascular membranes in type II diabetes mellitus.
  
  
  METHODS
  According to the preoperative duration of vitreous hemorrhage and severity of diabetic retinopathy, 78 eyes of 64 cases having undergone vitrectomy were divided into 2 groups for the comparison of postoperative visual acuity.
  
  
  RESULTS
  After 9 months of follow-up, in the group with preoperative vitreous hemorrhage of <or= 6 months' duration 42.1% of cases had visual acuity of >or= 0.3, while in the group with preoperative vitreous hemorrhage of > 6 months' duration 5.3% of cases reached such a level (P < 0.01). After one year, in the group with preoperative vitreous hemorrhage of <or= 6 months 35.7% of cases had visual acuity of >or= 0.5, while in the group with preoperative vitreous hemorrhages of > 6 months' duration, 7.1% (P < 0.05). In the group of vitreous hemorrhage with or without local tractional retinal detachment, 35.7% had visual acuity of >or= 0.5, while in the group with large area of tractional retinal detachment, 16.7% (P < 0.05).
  
  
  CONCLUSIONS
  Earlier vitrectomy is preferable for type II diabetes mellitus with vitreous hemorrhage, and the operative treatment should not be abandoned for the patients with vitreous hemorrhage of longer duration and severe tractional retinal detachment.
authors.affiliation: Department of Ophthalmology, People's Hospital of Beijing Medical University, Beijing 100044.
authors.forename: X
authors.initials: X
authors.lastname: Li
authors.forename: Y
authors.initials: Y
authors.lastname: Jiang
authors.forename: C
authors.initials: C
authors.lastname: Ye
authors.forename: C
authors.initials: C
authors.lastname: Li
mesh_terms: D003924:Diabetes Mellitus, Type 2 / Q000150:complications*; D003930:Diabetic Retinopathy / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D012163:Retinal Detachment / Q000209:etiology / Q000601:surgery*; D013997:Time Factors; D014792:Visual Acuity; D014821:Vitrectomy / Q000379:methods*; D014823:Vitreous Hemorrhage / Q000209:etiology / Q000601:surgery*