Hatice Ayhan Güler1,2, Nurgül Örnek3, Kemal Örnek4, Nesrin Büyüktortop Gökçınar3, Tevfik Oğurel3, Mehmet Erhan Yumuşak3, Zafer Onaran3. 1. Department of Ophthalmology, Faculty of Medicine, Kırıkkale University, Kırıkkale, Turkey. hatice_ayhanguler@hotmail.com. 2. Department of Ophthalmology, Bayburt State Hospital, Bayburt, Turkey. hatice_ayhanguler@hotmail.com. 3. Department of Ophthalmology, Faculty of Medicine, Kırıkkale University, Kırıkkale, Turkey. 4. Department of Ophthalmology, Kudret Eye Hospital, Ankara, Turkey.
Abstract
BACKGROUND: To assess corneal endothelial cell changes after intravitreal dexamethasone (DEX) implant (Ozurdex®) injection in patients with macular edema secondary to retinal vein occlusion (RVO). METHODS: Twenty-two eyes of 22 patients were assessed prospectively after intravitreal 0.7 mg DEX implant injection. Twenty-two eyes of 22 healthy volunteers served as control group. Corneal endothelial cell parameters including endothelial cell density (ECD), coefficient of variation of cell size (CV), percentage of hexagonality (Hex) and central corneal thickness (CCT) were analyzed before and 1 and 3 months after injection by specular microscopy. The results of the study were compared statistically. RESULTS: There were 17 (77.3%) patients with branch RVO and 5 (22.7%) patients with central RVO. Mean intraocular pressure (IOP) was 14.73 mmHg before injection, 17.05 mmHg at 1 month and 17.15 mmHg at 3 months after injection. Mean IOP at 1 and 3 months were significantly higher than pre-injection value (p = 0.002 and p = 0.003, respectively). There was a statistically significant reduction in mean ECD at 3 months after injection compared to pre-injection and 1 month (p = 0.013, p = 0.009, respectively) in the injected eyes. Mean ECD showed no significant difference in the uninjected fellow eyes during the follow up (p>0.05). Mean CV and Hex did not reveal a statistically significant difference in injected and uninjected fellow eyes (p > 0.05). No significant change was observed in mean CCT values during the follow up (p = 0.8). CONCLUSION: Intravitreal dexamethasone implant may cause a transient reduction in corneal endothelial cell density in short term without changing cell morphology.
BACKGROUND: To assess corneal endothelial cell changes after intravitreal dexamethasone (DEX) implant (Ozurdex®) injection in patients with macular edema secondary to retinal vein occlusion (RVO). METHODS: Twenty-two eyes of 22 patients were assessed prospectively after intravitreal 0.7 mg DEX implant injection. Twenty-two eyes of 22 healthy volunteers served as control group. Corneal endothelial cell parameters including endothelial cell density (ECD), coefficient of variation of cell size (CV), percentage of hexagonality (Hex) and central corneal thickness (CCT) were analyzed before and 1 and 3 months after injection by specular microscopy. The results of the study were compared statistically. RESULTS: There were 17 (77.3%) patients with branch RVO and 5 (22.7%) patients with central RVO. Mean intraocular pressure (IOP) was 14.73 mmHg before injection, 17.05 mmHg at 1 month and 17.15 mmHg at 3 months after injection. Mean IOP at 1 and 3 months were significantly higher than pre-injection value (p = 0.002 and p = 0.003, respectively). There was a statistically significant reduction in mean ECD at 3 months after injection compared to pre-injection and 1 month (p = 0.013, p = 0.009, respectively) in the injected eyes. Mean ECD showed no significant difference in the uninjected fellow eyes during the follow up (p>0.05). Mean CV and Hex did not reveal a statistically significant difference in injected and uninjected fellow eyes (p > 0.05). No significant change was observed in mean CCT values during the follow up (p = 0.8). CONCLUSION: Intravitreal dexamethasone implant may cause a transient reduction in corneal endothelial cell density in short term without changing cell morphology.
Authors: Julia A Haller; Francesco Bandello; Rubens Belfort; Mark S Blumenkranz; Mark Gillies; Jeffrey Heier; Anat Loewenstein; Young Hee Yoon; Jenny Jiao; Xiao-Yan Li; Scott M Whitcup; Joanne Li Journal: Ophthalmology Date: 2011-07-20 Impact factor: 12.079
Authors: Julia A Haller; Francesco Bandello; Rubens Belfort; Mark S Blumenkranz; Mark Gillies; Jeffrey Heier; Anat Loewenstein; Young-Hee Yoon; Marie-Louise Jacques; Jenny Jiao; Xiao-Yan Li; Scott M Whitcup Journal: Ophthalmology Date: 2010-04-24 Impact factor: 12.079
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