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A new type sphygmomanometer valve.

AN IMPORTANT prerequisite for early detection of arterial hypertension is reliable measurement of the resting blood pressure. General precautions necessary for proper registration of blood pressure relate to the patient, the examiner, and the instrument.1One caveat is the importance of a relatively uniform rate of cuff deflation. The optimal rate of deflation has not been determined but seems to be somewhere between 2 and 5 mm Hg/sec.1-3 Personal experience as well as observation of others indicates that most conventional sphygmomanometer valves are "sticky," and the desired rate and uniformity of deflation are practically impossible to attain. The purpose of this report is to describe a new sphygmomanometer valve that permits a predetermined rate of cuff deflation. The Valve The valve is shown in Fig 1. Operation is simple, depending on depression and release rather than rotation, as in the conventional valve. Depression of the push button opens