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Evaluation of the Usefulness of a PRN Regimen Using Ranibizumab for Macular Edema Due to Branch Retinal Vein Occlusion

Branch Retinal Vein Occlusion Clinical Trial

Official title:
Evaluation of Visual Acuity Improvement of a PRN Regimen Using Ranibizumab for Macular Edema Due to Ischemic and Non- Ischemic Branch Retinal Vein Occlusion.

Clinical Trial Summary

Monthly intravitreal ranibizumab (IVR) during the first 6 month had great effect for macular edema with branch retinal vein occlusion (BVO) both in visual and anatomical outcome. It is expected that similar results could be obtained by less frequent IVR. The purpose of this study is to investigate if IVR by PRN is as effective as by monthly. In addition, the investigators are going to study the relationship between macular edema and the size and location of retinal non-perfusion area.

Clinical Trial Description

It was demonstrated in BRAVO study that IVR had great effect for macular edema with BVO both in visual and anatomical outcome. However IVR was done monthly for all patients (except Sham group) during the first 6 months in BRAVO study. It is expected that similar results could be obtained by less frequent IVR, and if so, it will contribute to reduce patient's burden and medical cost. Thus it is necessary to determine the optimal regimen of IVR therapy.

In this study, considering the medical and social circumstances in Japan, the investigators are going to investigate if IVR by PRN is as effective as BRAVO study.In addition, the investigators are going to study the relationship between macular edema and the size and location of retinal non-perfusion area (NPA), because VEGF is thought to be released from non-perfused retinal tissue, and VEGF production may be correlated with NPA size and location. The investigators are going to measure the size of NPA semi-quantatively by ultra wide field fluorescein angiography (UWFA) using Optos 200Tx. Then the relationship with macular edema will be studied. The effect of ranibizumab to NPA is controversial. In this study, it will be investigated, too. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT02478515
Study type Interventional
Source Nagoya City University
Contact
Status Completed
Phase Phase 4
Start date January 2014
Completion date March 2019
View Details
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