Blood Flow Through the Adrenal Gland

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Abstract
The blood flow through carotid jugular adrenal autotransplants has been studied in conscious sheep; this has been supplemented by observations made under anesthesia on abdominal adrenals. The conditions for unimpeded venous outflow are discussed. The rate of blood flow in the normal animal is approximately 5 ml/min/g of gland, which is comparable with the level for the thyroid gland. The rate of flow is relatively insensitive to angiotensin, moderately responsive to intra-arterial noradrenaline, 5-hydroxytryptamine (5HT), bradykinin and histamine, and is responsive to intra-arterial acetylcholine and to ACTH at high doses. The rate of blood flow shows no consistent relationship to the rate of output of any of the steroids, when these vary primarily. Impedance to venous outflow reduces the rate of steroid output.

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