Measurement of Retinal Venous Pressure in Chronic Low-oxygen Environment
- Conditions
- Healthy
- Registration Number
- NCT01771770
- Lead Sponsor
- University Hospital, Basel, Switzerland
- Brief Summary
The hypothesis is that the pressure in the retinal veins increases from chronic lack of oxygen and leads to decreased blood flow. On the basis of high altitude mountaineering this hypothesis should be verified. At the same time the adaptation capacity of the blood circulation should be analyzed, and a relationship to mountain sickness should be found.
- Detailed Description
Conduct a field study to describe and quantify the retinal venous pressure (RVP) in healthy volunteers under conditions of controlled chronically reduced ambient pressure and oxygen partial pressure in the mountains. Obtaining indications regarding the adaptation of the retinal vascular system behavior to controlled, long-term hypoxic changes. Comparisons with blood pressure, pulse, oxygen saturation level and the appearance of symptoms of acute mountain sickness are made in order to obtain a better understanding of the development of high altitude illness.
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 40
- healthy
- eye diseases
- systemic diseases
- term medication (except contraceptives)
- pregnancy
- allergies to the ingredients Alcain, Tropicamide and Phenylephrine
Study & Design
- Study Type
- OBSERVATIONAL
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method Quantify the changes in the retinal venous pressure (RVP). 1-2 months Quantify the changes in the retinal venous pressure (RVP)
- Secondary Outcome Measures
Name Time Method
Trial Locations
- Locations (1)
University of Basel, Dept. of Ophthalmology
🇨ðŸ‡Basel, Switzerland