title: Changes in Intraocular Pressure During Orbital Floor Fracture Repair.
abstract: OBJECTIVE
  To evaluate changes in intraocular pressure (IOP) during orbital floor fracture repair.
  
  
  METHODS
  Retrospective chart review of patients undergoing isolated orbital floor fracture repair with implant placement at a level 1 trauma center and tertiary care center. Patients with combined zygomaticomaxillary or medial wall fracture repair, or other significant ocular injuries were excluded. IOP measurements using a handheld applanation tonometer were recorded immediately after induction of anesthesia, immediately after orbital floor implant placement, and on postoperative day 1.
  
  
  RESULTS
  Nine patients who underwent isolated orbital floor fracture repair were examined. There was a statistically significant mean decrease of 4.66 mmHg (p < 0.05) in IOP from prior to surgical to immediately after implant placement. There was also a significant mean increase in IOP of 7.44 mmHg (p < 0.05) at postoperative day 1 compared with immediately after implant placement. There was no statistically significant difference in IOP between prior to surgical incision and postoperative day 1.
  
  
  CONCLUSIONS
  All patients who underwent orbital floor fracture repair in this study had a significant decrease in IOP during orbital floor fracture repair that returned to immediately preoperative levels by postoperative day 1. This initial decrease in IOP may be because of intraoperative manipulation of the globe.
authors.affiliation: *Department of Ophthalmology, Alkek Eye Center, Baylor College of Medicine; †Department of Oral and Maxillofacial Surgery, University of Texas Health Science Center, Houston, Texas; ‡Department of Ophthalmology, Casey Eye Institute, Oregon Health and Sciences University, Portland, Oregon; and §Department of Ophthalmology, Oculofacial Plastic and Orbital Surgery, Gavin Herbert Eye Institute, University of California, Irvine, California, U.S.A.
authors.forename: Preeti J
authors.initials: PJ
authors.lastname: Thyparampil
authors.forename: Benjamin C
authors.initials: BC
authors.lastname: Campbell
authors.forename: Phillip N
authors.initials: PN
authors.lastname: Freeman
authors.forename: John D
authors.initials: JD
authors.lastname: Ng
authors.forename: Jeremiah
authors.initials: J
authors.lastname: Tao
authors.forename: Michael T
authors.initials: MT
authors.lastname: Yen
authors.forename: Douglas P
authors.initials: DP
authors.lastname: Marx
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D007429:Intraocular Pressure / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D009917:Orbital Fractures / Q000503:physiopathology / Q000601:surgery*; D020273:Orbital Implants; D012189:Retrospective Studies; D014065:Tonometry, Ocular; D055815:Young Adult