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Determination of systolic, mean and diastolic blood pressures with Dual cuff system is based on physiology

Single cuff automatic blood pressure (BP) measurements are subject to errors because the BP values are based on statistical estimation rather than on physiological principles. We developed a dual cuff experimental system that uses an arm cuff and a wrist cuff. The wrist cuff function is similar to auscultation. This study concentrated on the determination of systolic, diastolic and mean BP using the wrist cuff pulse waveforms and the arm cuff pressures. Fifty two BP tests from our database were used to compute blood pressures using the wrist cuff method and the single arm cuff method and the two methods were compared. Mean BP values for both methods were similar but there were important individual differences. The dual cuff method should prove to be more accurate than single cuff methods because it is based on physiological principles.