Validation of ambulatory blood pressure monitoring and pulse transit time

K H Liendo Martinez; D López-Padilla; J De Miguel Díez; F Villar Alvarez; T Gomez Garcia

doi:10.1183/13993003.congress-2022.2685

Abstract

Ambulatory blood pressure monitoring (ABPM) is the gold standard for arterial hypertension diagnosis. However, cuff-based ABPM has limitations. Pulse transit time (PTT) is supposed to correlate with BP. The aim was to validate the PTT method by measuring its correlation and agreement with ABPM.

A prospective multicentric study of patients attending Sleep Units, to whom a Polysomnography (SOMNOscreen DOMINO version 2.7) and ABPM (SPACE LABS model 90217) were performed. Spearman analysis and Bland-Altman plots were carried out to assess correlation and agreement of PTT with ABMP.

123 patients were included (64 males), mean age 55 years. 56 had hypertension diagnosis, 66 did not. The mean difference between mean systolic arterial tension (SAT) measured by PTT and ABMP was 2.04 ± 10.17 mmHg and 1.88 ± 7.68 mmHg for mean diastolic arterial tension (DAT). Correlations and limits of agreements are presented in Table 1. Bland-Altman plots are presented in Figure 1.

When compared with the gold standard, our data reveals poor correlation and wide limits of agreement between arterial tension measurements by the pulse transit time method.

Footnotes

Cite this article as Eur Respir J 2022; 60: Suppl. 66, 2685.

This article was presented at the 2022 ERS International Congress, in session “-”.

This is an ERS International Congress abstract. No full-text version is available. Further material to accompany this abstract may be available at www.ers-education.org (ERS member access only).