• Department of Ophthalmology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China;
Dai Hong, Email: dai-hong@x263.net
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Objective To observe the short-term intraocular pressure changes of the affected eye after the implantation of dexamethasone vitreous implant (Ozurdex), and indirectly understand the tightness of the scleral perforation of the 22G implant device.Methods This is a prospective cohort design clinical observational study. From January 2018 to January 2020, 90 eyes (90 patients) who underwent vitreous Ozurdex implantation in the Department of Ophthalmology of Beijing Hospital were included in the study. There were 52 males (52 eyes), and 38 females (38 eyes); they were 14-79 years old. Forty-three eyes (43 patients) had retinal vein occlusion with macular edema, 29 eyes (29 patients) had uveitis with or without macular edema, 18 eyes (18 patients) had diabetic macular edema. All eyes underwent standard scleral tunnel vitreous cavity implantation Ozurdex treatment. The intraocular pressure was measured with a non-contact pneumatic tonometer 10 min before implantation (baseline) and 10, 30 min and 2, 24 h after implantation. The difference were compared between the intraocular pressure at different time points after implantation and the baseline. Wilcoxon signed rank test was used to compare intraocular pressure between baseline and different time points after implantation.Results The average baseline intraocular pressure of the affected eye was 14.85 [interquartile range (IQR): 11.60, 17.63] mmHg (1 mmHg=0.133 kPa). The average intraocular pressure at 10, 30 and 2, 24 hours after implantation were 11.90 (IQR: 8.95, 16.30), 13.75 (IQR: 9.95, 16.80), 13.60 (IQR: 10.95, 17.20), and 14.65 (IQR: 12.20, 17.50) mmHg. Compared with the baseline intraocular pressure, the intraocular pressure decreased at 10 and 30 minutes after implantation, the difference was statistically significant (P<0.001, P=0.002); the intraocular pressure difference was not statistically significant at 2, 24 h after implantation (P=0.140, 0.280).Conclusions There is a statistically significant difference in intraocular pressure reduction compared with the baseline in 10 and 30 minutes after vitreous implantation of Ozurdex, and there is no statistically significant difference between 2, 24 hours. This suggests that the 22G scleral puncture port of the preinstalled implant device cannot be completely closed immediately, and short-term intraocular pressure monitoring after implantation should be appropriately strengthened.

Citation: Zhao Jing, Dai Hong, Zhang Peng, Zheng Bodi. Short-term change of intraocular pressure following inravitreal dexamethasone implantation. Chinese Journal of Ocular Fundus Diseases, 2020, 36(10): 772-776. doi: 10.3760/cma.j.cn511434-20200522-00234 Copy