Assessment of sequential same arm agreement of blood pressure measurements by a CVProfilor™ do 2020 versus a Baumanometer® mercury sphygmomanometer

Abstract

The aim of this study was to assess the accuracy of sequential same arm blood pressure measurement by the mercury sphygmomanometer with the oscillometric blood pressure measurements by a device that also determines arterial elasticity. A prospective, multicenter, clinical study evaluated sequential same arm blood pressure measurements, using a mercury sphygmomanometer (Baumanometer®, W. A. Baum Co., Inc., Copiague, NY) and an oscillometric non invasive device that calculates arterial elasticity (CVProfilor™ DO-2020 CardioVascular Profiling System, Hypertension Diagnostics, Inc., Eagan, MN). Blood pressure was measured supine in triplicate 3 minutes apart in a randomized sequence after a period of rest. The study population of 235 normotensive and hypertensive subjects included 57% females, 51% Caucasians, and 33% African American. The mean difference between test methods of systolic blood pressure, diastolic blood pressure, and heart rate was -3.2 ± 6.9 mmHg, +0.8 ± 5.9 mmHg, and +1.0 ± 5.7 beats/minute. A significant correlation was observed between values obtained manually and those obtained via the CVProfilor™ DO-2020 System for each of the parameters: systolic blood pressure (r= 0.95, p= 0.0001), diastolic blood pressure (r= 0.92, p= 0.0001), and pulse rate (r= 0.85, p= 0.0001). For systolic and diastolic blood pressure, 60.9% and 70.4% of sequential measurements by each method were within ±5 mmHg. Few or no points fell beyond the mean ±2 standard deviations lines for each cuff bladder size. Sequential same arm measurements of the CVProfilor™ DO 2020 Cardio Vascular Profiling System measures blood pressure by an oscillometric method (dynamic linear deflation) with reasonable agreement to a mercury sphygmomanometer.