title: Postoperative vitreous hemorrhage after diabetic 23-gauge pars plana vitrectomy.
abstract: OBJECTIVE
  To report the frequency of postoperative vitreous hemorrhage (VH) in eyes that underwent primary 23-gauge pars plana vitrectomy (PPV) for nonclearing VH resulting from proliferative diabetic retinopathy, as well as associated risk factors.
  
  
  METHODS
  Retrospective, consecutive, interventional case series.
  
  
  METHODS
  
  
  
  METHODS
  Institutional (Retina Service of Wills Eye Institute).
  
  
  METHODS
  One hundred seventy-three eyes of 157 patients.
  
  
  METHODS
  Twenty-three-gauge PPV for nonclearing diabetic VH.
  
  
  METHODS
  Percentage of eyes in which postoperative VH developed, categorized as early, delayed, or severe persistent, as well as percentage requiring reoperation.
  
  
  RESULTS
  During a mean follow-up of 32 weeks, 56 (32%) of 173 eyes demonstrated postoperative VH, categorized as early (8 eyes; 5%), delayed (13 eyes; 8%), or severe persistent (35 eyes; 20%). Twenty-two (13%) of 173 eyes required reoperation: 4 (50%) of 8 in the early group, 8 (62%) of 13 in the delayed group, and 10 (29%) of 35 in the severe persistent group. Mean preoperative logarithm of the minimum angle of resolution visual acuity was 1.5 (Snellen equivalent, approximately 20/600); mean postoperative VA was 0.65 (Snellen equivalent, approximately 20/90), a gain of 0.85 (P < .0001). Thirty-four (27%) of 127 eyes with complete scatter photocoagulation before undergoing PPV compared with 22 (48%) of 46 eyes with incomplete scatter photocoagulation before undergoing PPV demonstrated postoperative VH (P = .002). Other factors associated with postoperative VH included younger age (P = .022) and phakia (P = .036).
  
  
  CONCLUSIONS
  Postoperative VH was not uncommon after initial 23-gauge PPV for diabetic VH and was associated with incomplete scatter photocoagulation, younger age, and phakia before PPV. However, only a minority of patients required reoperation.
authors: Retina Service, Wills Eye Institute, Philadelphia, Pennsylvania 19107, USA.
authors: Mohammed K
authors: MK
authors: Khuthaila
authors: Jason
authors: J
authors: Hsu
authors: Allen
authors: A
authors: Chiang
authors: Francis Char
authors: FC
authors: DeCroos
authors: Eugene A
authors: EA
authors: Milder
authors: Vikram
authors: V
authors: Setlur
authors: Sunir J
authors: SJ
authors: Garg
authors: Marc J
authors: MJ
authors: Spirn
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003930:Diabetic Retinopathy / Q000601:surgery*; D058450:Endotamponade; D005260:Female; D005466:Fluorocarbons / Q000008:administration & dosage; D005500:Follow-Up Studies; D006801:Humans; D017075:Laser Coagulation; D008297:Male; D008866:Microsurgery; D008875:Middle Aged; D011183:Postoperative Complications; D012086:Reoperation; D012189:Retrospective Studies; D012307:Risk Factors; D013459:Sulfur Hexafluoride / Q000008:administration & dosage; D014792:Visual Acuity / Q000502:physiology; D014821:Vitrectomy; D014823:Vitreous Hemorrhage / Q000209:etiology*
chemical_list: D005466:Fluorocarbons; C042852:perflutren; D013459:Sulfur Hexafluoride