Differentiation of retinal circulation times by videoangiography.
Videoangiography is capable of identifying the different phases of a fluorescein angiogram exactly in terms if time elapsed. We employ slow-motion television techniques to determine the rate at which fluorescein flows through the retinal vessels. By this means the arterial, capillary and venous circulatory phases can be isolated at will for study. The way for this method is opened by a division of the overall circulation interval of a bolus through the retinal vessel into arterial, early venous and late venous circulation times. In the study described here the normal parameters of these circulatory times were determined for a group of healthy subjects (n = 100).
D001783:Blood Flow Velocity; D005451:Fluorescein Angiography / Q000379:methods*; D006801:Humans; D012171:Retinal Vessels; D014741:Video Recording / Q000379:methods*