Figure 4
From: Intra-beat biomarker for accurate continuous non-invasive blood pressure monitoring
Assessing accuracy and precision of inpatient BP monitoring using a PPG sensor. (a) Pearson correlation and (b) Bland–Altman analyses compared beat-to-beat (left) SBP, (middle) DBP, and (right) MAP measurements between the noninvasive PPG sensor and invasive A-line. (a) PPG sensor measurements (n = 9628) showed strong linear correlations to the A-line, with Pearson coefficients of 0.982, 0.958, and 0.952 for SBP, DBP, and MAP, respectively. (b) PPG sensor measurements (n = 9628) demonstrated mean biases of − 0.14 (3.20), 0.36 (1.99), and 0.19 (2.09) mmHg for SBP, DBP, and MAP, respectively. Light- and dark-shaded areas represent 68% (1 SD) and 95% (1.96 SD) limits of agreement, respectively.
