Tilting a flat operating table so that the head end is lower than the foot end is common practice in the treatment of hypotension. The head-down position generally means rotation of the entire body about its transverse axis, so that the head is lower than the thorax, which is lower than the abdomen, which, in turn, is lower than
the feet. The effect is usually merely the increased oxygenation of the important and sensitive brain in the presence of low arterial blood pressure, when gravity is made to help and not hinder the work of the heart in this regard. In the cases offered here, the effect of head lowering was examined, not on cerebral oxygenation, but on the blood pressure itself, to find out whether, if hypotension occurred, lowering the patient's head would raise his blood pressure. Fifteen cases of hypotension were studied. The low blood pressure was generally
Cole F. HEAD LOWERING IN TREATMENT OF HYPOTENSION. JAMA. 1952;150(4):273–274. doi:10.1001/jama.1952.03680040015004
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