Local Regulation of Vascular Cross Section during Changes in Femoral Arterial Blood Flow in Dogs
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The dilatation response occurred despite slight reductions in femoral blood pressure, and was present after ganglionic blockade, blockade of alpha and beta receptors with phenoxybenzamine and propranolol, atropinization and injection of an antihistamine.Abstract:
Diameters of the exposed femoral artery of anesthetized dogs were continuously measured with ultrasonic elements of lead zirconate titanate. In 13 of 16 dogs vascular diameters increased following a sudden increment in arterial blood flow induced by the injection of vasodilating agents (acetylcholine, histamine) peripheral to the recording level, by opening an arteriovenous shunt, or after tetanic stimulation of the sciatic nerve. The dilatation response occurred despite slight reductions in femoral blood pressure, and was present after ganglionic blockade, blockade of alpha and beta receptors with phenoxybenzamine and propranolol, atropinization and injection of an antihistamine. The dilatation response was also observed after transsection of the femoral artery distal to the recording level and is therefore not dependent on the retrograde propagation of nervous or myogenous impulses along the vascular wall.read more
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References
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The Pharmacological Basis of Therapeutics
TL;DR: The Pharmacological Basis of Therapeutics, by Prof. Louis Goodman and Prof. Alfred Gilman, New York: The Macmillan Company, 1941, p.
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On the local reactions of the arterial wall to changes of internal pressure.
TL;DR: My attention was first directed to these phenomena by the occurrence of curves like that reproduced in Fig. 11, which showed the effect of a fall of arterial pressure produced by exI citing the central end of the depressor nerve on the volume of the hind leg of the rabbit, the sciatic and the nerves accompanying the femoral artery having been cut.