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Beobachtungen und Analysen mikrozirkulatorischer Vorgänge am Rattenauge - I. Mitteilung Über das druckabhängige Verhalten der Irisgefäße

Albrecht von Graefes Archiv für Klinische und Experimentelle Ophthalmologie, ISSN: 0065-6100, Vol: 171, Issue: 1, Page: 85-102
1966
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The dependence of iris vessels behavior on changes in the extra and intravascular pressure was investigated microscopically in albino rats in vivo: The blood flow was observed directly and the inner diameters of arteries and veins were recorded in series of microphotographs. After decreasing the effective intravascular pressure (by applying carotis ligature or increasing the intraocular pressure) in most cases we found a dilatation and after increasing it (by raising the general blood pressure) a constriction of the arterial vessels. The characteristic changes in the diameters of the arteries were regarded as an expression of active (vasomotor) reaction of these vessels. On the other hand the iris veins reacted passively to pressure changes. The vascular reactions were in respect to their extend and course also quantitatively analysed and discussed in relation to the behavior of the blood flow in the iris. © 1966 Springer-Verlag.

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