INTERNAL JUGULAR VENOUS PRESSURE IN MAN

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Abstract
We undertook to measure the venous pressure of the internal jugular vein near the bulb and to correlate this pressure with the cerebrospinal fluid pressure. Since there are three factors in intracranial dynamics, first, the arterial pressure, second, the venous pressure and third, the cerebrospinal fluid pressure, we also undertook in a few cases to measure the intracarotid pressure and to note its relationship under experimental conditions to the jugular venous and the cerebrospinal fluid pressures. Practically all of the previous work on the important subject of the relation of the venous and cerebrospinal fluid pressures has been done on animals under conditions of anesthesia. Our object was to study the various pressures mentioned in the human being under experimental and clinical conditions. It is obvious that it is impossible to trephine into the torcular Herophili in a human being, and that the introduction of a cannula in the carotid

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