A11477 Volume-compressive oscillometry as new blood pressure-measuring device

Abstract

Objectives: to compare values of BP, obtained by the volume-compression oscillometry (VCO) with BP levels measured on the brachial artery by the Korotkoff method, and with central BP assessed by applanation tonometry. Methods: 95 volunteers were included in the study - 41 young adults (<35 years) and 54 patients with arterial hypertension (AH) aged >60 years. BP was measured using a mercury sphygmomanometer by the Korotkoff method, as well as by the VCO method using the tachooscillometric device EDTV-Hemodin (Innovative Medical Technologies, Russia). Central systolic and diastolic BP, was measured using a SphygmoCor device (AtCorMedical, WestRyde, NSW, Australia). 62% were male. Results: the mean systolic BP by Korotkoff method was 129.0 ± 10.1 mm Hg, diastolic - 73.0 ± 8.9 mm Hg, by VCO - 114.0 ± 9.9 mm Hg and 53.8 ± 10.0 mm Hg, respectively. The mean central systolic BP, measured by applanation tonometry, was 111.2 ± 9.8 mm Hg; mean diastolic BP was 74.7 ± 8.6 mm Hg. No significant correlation between BP, measured by the auscultatory method and VCO, was found. Spearman's correlation between the systolic BP and the central systolic BP was r = 0.48 (p < 0.05), and the bias between the methods, measured with Bland-Altman statistics, was minimal (−2.01 [6.01, 1.7] mm Hg). The positive correlation between BP measured by the method of the VCO and central systolic BP was noted: for the group of healthy volunteers (104.2 ± 5.8 mm Hg and 117.5 ± 9.0 mm Hg, respectively), the Bland-Altman's bias was 4.55 [−9.76; 1.33] mm Hg, and for the group of patients with AH (109.5 ± 10.8 mm Hg and 116.9 ± 11.0 mm Hg, respectively) - 1.02 [−4.98; 5.89] mm Hg. Conclusion: the comparability of systolic BP values calculated in the aorta by applanation tonometry and measured with VCO was demonstrated by the Bland-Altman method.