An observational study in Healthy Subjects and Anemia, sponsored by Triemli Hospital. Status unknown at 1 site in Switzerland. Open to participants aged 18 Years to 90 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2009-12-03.
Sponsored by Triemli Hospital · Observational
The purpose of this study is to test a new non-invasive tool to measure hemoglobin in retinal arteries.
To our knowledge no tool exists that allows for direct collection of hemoglobin data in the eye. In many eye diseases (especially diabetic and hypertensive retinopathy as well as in retinal vessel occlusions) retinal circulation is modified. Knowing hemoglobin concentration on the site of the pathology will give us further information about the pathogenesis of this diseases and may provide a new possibility in therapy.
The purpose of this study is to test a new non-invasive tool to measure hemoglobin in retinal arteries. Healthy volunteers from the eye clinic and pregnant otherwise healthy patients of the gynecological department of the Triemli Hospital, Zurich, as well as anemic gynecological patients that show up for a check-up are included.
Hemoglobin will be quantified by a blood draw of a cubital vein. Using a Fundus Camera (Nidek AFC-230) pictures of the fundus will be taken from each study patient. Afterwards the study investigator selects a retinal artery of interest which will be used for measuring the hemoglobin concentration. Intensity of the green channel of the camera chip is determined with the aid of the law of Lambert-Beer.
Absolute Hemoglobin concentration is calculated in relation to the vessel volume.
Triemli Hospital is the lead sponsor of 12 studies on the registry; none are open to participants now.
Counted across the registry records on this site, refreshed daily.
healthy subjects from the eye clinic of Triemli Hospital anemic and pregnant patients from the gynecology department, Triemli Hospital
Exclusion Criteria:
healthy volunteers from the eye and gynecology department pregnant patients with anemia
Device: Fundus photography, cubital blood draw
blood draw from a cubital vein to measure hemoglobin concentration taking a fundus photography with a Nidek AFC-230, no pupil dilation needed
Correlation of hemoglobin concentration measured in a cubital vein and in a non invasive way using hemoglobinometry in the retinal veins
Time frame: 2.5 years
This study is status unknown, as verified in Nov 2009. You cannot join it, but the record below documents what was studied.
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Triemli Hospital