title: Short-term safety of dexamethasone implant for treatment of macular edema due to retinal vein occlusion, in eyes with glaucoma or treated ocular hypertension.
abstract: OBJECTIVE
  To report the short-term safety of dexamethasone implants to treat macular edema due to retinal vein occlusion (RVO), in eyes with treated glaucoma or ocular hypertension at baseline using an as-needed re-treatment regimen.
  
  
  METHODS
  Retrospective clinical database study from two centers using the same electronic medical record system. Extracted data included: intraocular pressure (IOP), visual acuity (VA), central 1 mm retinal thickness (CRT) by optical coherence tomography, phakic status, number of injections, glaucoma treatment, and peri-operative complications.
  
  
  RESULTS
  Thirty-three eyes of 33 patients on IOP-lowering treatment for glaucoma or ocular hypertension (OHT) at baseline and mean IOP of 16 mmHg at baseline received one to four (mean, 1.8; median, 1) dexamethasone implants over 18 months for RVO-related macular edema. Fourteen eyes (42 %) had IOP of ≥21 mmHg, and three eyes (9 %) had IOP of ≥35 mmHg at one or more visits during the study period. Nine of 14 eyes (64 %) with raised IOP required additional topical treatment only for a mean (SE) period of 8.5 months (3.2), while the remaining five eyes (36 %) required long-term additional IOP-lowering treatment for a mean (SE) of 16 months (1.44). Surgery for IOP lowering was not required in any eye. Mean VA (SE) improved from 44 (3) ETDRS letters at baseline to 47 letters (5) at 2 months (p = 0.049), 48 (8) letters at 6 months and 46 (4) letters at 12 months. Mean CRT (SE) improved from 530 (25) μm at baseline to 323 (27) μm at 2 months (p < 0.001), 498 (76) μm at 6 months, and 359 (25) μm at 12 months (p < 0.001).
  
  
  CONCLUSIONS
  The short-term IOP rise after intravitreal dexamethasone implant in eyes with glaucoma or ocular hypertension at baseline was acceptable and consistent with previous reports in patients without preexisting glaucoma. Treated OHT or glaucoma may not be a strict contraindication against the use of dexamethasone implant, but close monitoring of IOP is required.
authors.affiliation: School of Clinical Sciences, University of Bristol and Bristol Eye Hospital, Bristol, UK.
authors.forename: Sofia
authors.initials: S
authors.lastname: Theodoropoulou
authors.affiliation: Gloucestershire Eye Unit, Cheltenham General Hospital, Sandford Road, Cheltenham, UK.
authors.forename: Abdallah A
authors.initials: AA
authors.lastname: Ellabban
authors.affiliation: Gloucestershire Eye Unit, Cheltenham General Hospital, Sandford Road, Cheltenham, UK.
authors.forename: Robert L
authors.initials: RL
authors.lastname: Johnston
authors.affiliation: Ophthalmology Department, South Warwickshire NHS Foundation Trust, Warwick, UK.
authors.forename: Helena
authors.initials: H
authors.lastname: Cilliers
authors.affiliation: Gloucestershire Eye Unit, Cheltenham General Hospital, Sandford Road, Cheltenham, UK.
authors.forename: Quresh
authors.initials: Q
authors.lastname: Mohamed
authors.affiliation: Gloucestershire Eye Unit, Cheltenham General Hospital, Sandford Road, Cheltenham, UK. ahmedsallam11@yahoo.com.|Jones Eye Institute, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA. ahmedsallam11@yahoo.com.
authors.forename: Ahmed B
authors.initials: AB
authors.lastname: Sallam
mesh_terms: D000369:Aged, 80 and over; D000959:Antihypertensive Agents / Q000627:therapeutic use*; D003907:Dexamethasone / Q000008:administration & dosage*; D004305:Dose-Response Relationship, Drug; D004343:Drug Implants; D004359:Drug Therapy, Combination; D005260:Female; D005500:Follow-Up Studies; D005901:Glaucoma / Q000150:complications* / Q000188:drug therapy; D005938:Glucocorticoids; D006801:Humans; D007429:Intraocular Pressure; D058449:Intravitreal Injections; D008269:Macular Edema / Q000175:diagnosis / Q000188:drug therapy* / Q000209:etiology; D008297:Male; D009798:Ocular Hypertension / Q000150:complications* / Q000188:drug therapy; D012170:Retinal Vein Occlusion / Q000150:complications* / Q000175:diagnosis / Q000188:drug therapy; D012189:Retrospective Studies; D013997:Time Factors; D041623:Tomography, Optical Coherence; D016896:Treatment Outcome; D014792:Visual Acuity
chemical_list: D000959:Antihypertensive Agents; D004343:Drug Implants; D005938:Glucocorticoids; D003907:Dexamethasone
keywords: Dexamethasone implant; Glaucoma; Macular edema; Ocular hypertension; Retinal vein occlusion