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Structural and functional assessment after intravitreal injection of ranibizumab in diabetic macular edema

Documenta Ophthalmologica volume 135, pages 165–173 (2017)Cite this article

Abstract

Purpose

To evaluate structure and function improvement in central retina by optical coherence tomography (OCT) and multifocal electroretinography (mf-ERG) in diabetic macular edema (DME) patients after intravitreal injection of ranibizumab (IVR) treatment.

Methods

Twenty-seven eyes in 27 patients with DME received three consecutive monthly injections of IVR (0.05 ml, 10 mg/ml) and as needed thereafter. The clinical parameters of best-corrected visual acuity (BCVA), central foveal thickness (CFT) and mf-ERG were monitored for 6 months before and after IVR. The findings at baseline, 1, 3 and 6 months were analyzed. Correlation and regression analyses were performed on BCVA, CFT, mf-ERG amplitude and implicit time of the N1 and P1 waves.

Results

IVR significantly improved visual acuity from the beginning of the treatment (P < 0.05). There were significant decreases in the CFT compared with the baseline after IVR (P < 0.05). The mean amplitude of P1 and N1 in the central ring at all examinations increased significantly compared with the baseline (P < 0.05). The mean P1 and N1 implicit times in the central ring were shortened, but not significantly (P > 0.05). There were significant correlations of BCVA with CFT, P1 and N1 amplitudes in the central retina (P < 0.05).

Conclusion

In addition to the improvement in BCVA and the reduction in CFT, IVR improved macular retinal function, as assessed by mf-ERG, in diabetic eyes. The combination of OCT and mf-ERG for macular evaluation may better assess DME.

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Affiliations

  1. Department of Ophthalmology, Affiliated Hospital of Qingdao University, Qingdao, 266555, Shandong Province, China

    YuDong Fu, XuXia Meng, Zhaodong Du & DaBo Wang

  2. Department of Endocrinology, Affiliated Hospital of Qingdao University, Qingdao, 266555, Shandong Province, China

    Ping Wang

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  1. YuDong Fu
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Correspondence to DaBo Wang.

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Fu, Y., Wang, P., Meng, X. et al. Structural and functional assessment after intravitreal injection of ranibizumab in diabetic macular edema. Doc Ophthalmol 135, 165–173 (2017). https://doi.org/10.1007/s10633-017-9604-z

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  • DOI: https://doi.org/10.1007/s10633-017-9604-z

Keywords

  • Ranibizumab
  • Diabetic macular edema
  • Mf-ERG
  • OCT