A SIMPLE METHOD FOR CONTINUOUS MONITORING OF DIRECT MEAN ARTERIAL PRESSURE

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Abstract
Several methods of measuring direct arterial pressure without electronic equipment have been described in the past, none of which is truly satisfactory. A method is described using simple components, including a pressurized infusion system and a mercury manometer. This system is easily set up and readily autoclaved. The inertia of the system is high but it is claimed that the apparatus provides a reliable continuous measurement of mean arterial pressure. The slow continuous flush prevents blockage of the arterial cannula, and the extent and significance of any errors caused by this flush rate are discussed. This has been used in fifty patients both in the operating theatre and in the Recovery and Intensive Therapy Units. It has proved to be a satisfactory method and no serious complications have occurred.

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