Objective Measurement of Retinal Ischemia in Central Retinal Vein Occlusion, and the Effects of Treatment With a Vascular Endothelial Growth Factor Inhibitor.
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 24
- 试验地点
- 1
- 主要终点
- Retinal oxygen saturation
研究概览
简要总结
Recent studies have shown a remarkably positive effect of 6 monthly injections of Ranibizumab on eyes with CRVO. The disease may cause severe sight threatening complications, partly due to restrictions in blood flow and oxygenation . Although Ranibizumab has been shown affective to reduce oedema of the retina, it is not known whether the drug ameliorates or aggravates restrictions in oxygenation.
The Oxymap oximeter allows a non-invasive measurement of the oxygen saturation in retinal vessels and thus the state of retinal oxygenation.
The primary objective of the study is to evaluate the effects of injections of Ranibizumab on the retinal oxygen saturation in eyes with newly diagnosed central retinal vein occlusion (CRVO),
The secondary objective is to evaluate the effects of injections of Ranibizumab on visual acuity and retinal oedema in eyes with different degree of ischemia.
详细描述
Background and objectives
The CRUISE study has shown a remarkable positive effect of 6 monthly injections intravitreal Ranibizumab on visual function in eyes with macular edema secondary to CRVO. Eyes with CRVO are at risk of severe complications to retinal ischemia, particularly proliferative retinopathy and neovascular glaucoma. It is not known whether intravitreal anti-VEGF therapy ameliorates or aggravates retinal ischemia and thus the risk of ischemic complications is unknown. Since complications to retinal ischemia take time to develop, and are relatively infrequent, the CRUISE study was not designed, or powered, to investigate the impact of intravitreal anti-VEGF treatment on these complications.
The Oxymap oximeter allows objective non-invasive measurement of the oxygen saturation in retinal vessels and thus the degree of retinal ischemia. The rationale behind the present study is to use this instrument in order to obtain preliminary information on the effects of intravitreal anti-VEGF treatment on retinal ischemia in CRVO eyes without having to wait for ischemic complications to arise in a large study population.
The primary objective of the study is to evaluate the effects of treatment with intravitreal Ranibizumab on the retinal oxygen saturation in eyes with newly diagnosed central retinal vein occlusion (CRVO),
The secondary objective is to evaluate the effects of intravitreal Ranibizumab on visual acuity and central retinal thickness in eyes with different degree of ischemia.
研究设计
- 研究类型
- Observational
- 观察模型
- Case Only
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Central retinal vein occlusion in one eye.
- •Planned treatment with intravitreal injections of Lucentis (ranibizumab)
- •Functional fellow eye.
排除标准
- •Current or previous medical condition that in the opinion of the investigator may confound assessment of study results or put where the study methods may put the patient at risk.
- •Patients who are unable to receive treatment with vascular endothelial growth factor inhibitors.
- •Prior panretinal photocoagulation in the study eye.
- •Prior intraocular surgery in the study eye, other than cataract operation.
- •Any intravitreal injection 6 months prior to study baseline
- •Participation in another clinical study that, in the opinion of the investigator, may confound the assessment of study results.
结局指标
主要结局
Retinal oxygen saturation
时间窗: 6 months after first injection of ranibizumab.
Oxygen saturation is measured with the Oxymap Retinal Oximeter, which allows for objective, non-invase oximetry in retinal vessel. The outcome measure will be the change in saturation from baseline to 6 months after first injection.
次要结局
- Visual acuity(6 months after first injection of ranibizumab.)
- Central retinal thickness(6 months after first injection of ranibizumab.)
研究者
Sindri Traustason
Cand. Scient.
Glostrup University Hospital, Copenhagen