Abstract
Summary
A simple and reliable method of obtaining blood from the cavernous sinus of the dog has been presented. The level of ACTH in this blood under a variety of conditions has been found to be many times higher than the concentration in peripheral arterial blood. Hypophysectomy causes a fall to zero in the level of ACTH in this blood. With this techniC., insertion of the needle into the cavernous sinus is shown to be a definite but transient stress.
The authors arc pleased to acknowledge their indebtedness to Miss Faith Bebchick and Miss Mar-iiaret Hanley for technical assistance.
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