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Dexamethasone Intravitreal Implant Rescue Treatment for Bevacizumab Refractory Macular Edema Secondary to Branch Retinal Vein Occlusion

 Kyou Ho Lee  ;  Eui Chun Kang  ;  Hyoung Jun Koh 
 Korean Journal of Ophthalmology, Vol.31(2) : 108-114, 2017 
Journal Title
 Korean Journal of Ophthalmology 
Issue Date
Aged ; Angiogenesis Inhibitors/administration & dosage ; Bevacizumab/administration & dosage* ; Dexamethasone/administration & dosage* ; Drug Implants ; Drug Resistance* ; Female ; Follow-Up Studies ; Glucocorticoids/administration & dosage ; Humans ; Intravitreal Injections ; Macular Edema/diagnosis ; Macular Edema/drug therapy* ; Macular Edema/etiology ; Male ; Retinal Vein Occlusion/complications* ; Retinal Vein Occlusion/diagnosis ; Retrospective Studies ; Tomography, Optical Coherence ; Treatment Outcome ; Visual Acuity*
PURPOSE: To evaluate the prognostic factors and outcomes of dexamethasone intravitreal implant (DEX implant) for intravitreal bevacizumab refractory macular edema secondary to branch retinal vein occlusion (BRVO). METHODS: This was a retrospective, interventional case series. Medical records were reviewed, and a total of 38 eyes that were treated with DEX implant for macular edema secondary to BRVO that did not respond to at least two consecutive intravitreal bevacizumab injections (IBIs) were included. Best-corrected visual acuity (BCVA), central subfield macular thickness, and central subfoveal choroidal thickness were evaluated at baseline, 2 months, and 6 months after DEX implantation. RESULTS: Patients had undergone an average of 6.32 ± 4.66 prior IBI treatments. The average BCVA improved from 0.53 ± 0.26 to 0.41 ± 0.25 and 0.44 ± 0.23 logarithm of the minimal angle of resolution (logMAR) at 2 and 6 months, respectively (p < 0.001). The average central subfield macular thickness was 504.00 ± 121.54 µm at baseline and changed to 293.21 ± 74.17 µm and 427.28 ± 119.57 µm at 2 and 6 months, respectively (p < 0.001 and p = 0.002). Average central subfoveal choroidal thickness was 237.46 ± 92.21 µm at baseline and changed to 204.75 ± 74.74 µm and 226.86 ± 90.77 µm at 2 and 6 months, respectively (p < 0.001 and p = 0.455). Twenty-two eyes (58%) gained ≥0.1 logMAR at 2 months, while 16 eyes showed no improvement. Low BCVA at symptom presentation, low baseline BCVA, and shorter duration of macular edema were correlated with increased BCVA after treatment. CONCLUSIONS: The DEX implant improves functional and anatomical outcomes for up to 6 months in about half of the patients treated with IBI refractory macular edema secondary to BRVO, particularly in patients with low initial and baseline BCVA.
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1. College of Medicine (의과대학) > Dept. of Ophthalmology (안과학교실) > 1. Journal Papers
Yonsei Authors
Kang, Eui Chun(강의천)
Koh, Hyoung Jun(고형준) ORCID logo https://orcid.org/0000-0002-5932-8516
Lee, Kyou Ho(이규호)
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