DIRECT ARTERIAL AND VENOUS PRESSURE MEASUREMENTS IN MAN AS AFFECTED BY ANESTHESIA, OPERATION AND SHOCK

Abstract

The venous and arterial pressure pulses were recorded by the hypodermic manometer. Certain abnormal pulse forms render inaccurate clinical estimation of blood pressure. The changes produced by operation and anesthesia are of 2 types: low arterial pressure with rapid pulse of the empty type presented by cases of haemorrhage or secondary traumatic shock; equally low pressures with slow pulse and pressure pulse contours of an entirely different shape presented by cases of neurogenic shock. The venous pressure is reduced in both types of shock. The V wave shows higher pressure early in operation than late.