Ambulatory blood pressure monitoring by a novel cuffless device: a pilot study

Figures & data

Figure 1. The cuffles blood pressure device Rooti RX. (A) Fixing of the device on the patch; (B) connection of the patch to the electrodes; (C) exposure of the adhesive part of the electrodes; (D) fixing the electrodes to the skin.

Table 1. Baseline characteristics (mean values ± standard deviation or percentages) of the study population.

	Study population = 84
Age (years)	62.9 ± 13
Males (n,%)	45 (53,6%)
Females (n,%)	39 (46.4%)
BMI > 25 (n,%)	53 (63.1%)
High-normal blood pressure (n,%)	18 (21.4%)
Grade 1 hypertension (n,%)	33 (39.2%)
Grade 2–3 hypertension (n,%)	8 (9.4%)
Previous cardiovascular events (n,%)	21 (25%)
Diabetes (n,%)	23 (27.3%)
Drug therapy (n,%)	65 (77.3%)

BMI: body mass index; BP: blood pressure; CV: cardiovascular.

Figure 2. Correlation between C-BP and CL-BP devices in patients with BMI > 25 and BMI < 25. C-BP: cuff based blood pressure; CL-BP: cuffless blood pressure; BMI: body mass index.

Table 2. Twenty-four hours mean absolute and percent differences (delta) between the blood pressure (BP) measuring devices in patients with a 24 h ambulatory SBP and DBP normal or elevated (upper panel).

	Bp < 130/80 (n = 53)	Bp ≥ 130/80 (n = 31)
24h SBP delta (mmHg)	7.0 ± 13.2	3.6 ± 8.3
24h DBP delta (mmHg)	6.5 ± 8.1	1.9 ± 5.7**
24h SBP delta (%)	4.7 + 9.8	1.8 + 8.3
24h DBP delta (%)	7.4 ± 10.1	1.8 ± 6.3**
	DAY	NIGHT
SBP delta (mmHg)	4.9 ± 13.7	7.6 ± 16.1
DBP delta (mmHg)	3.5 ± 8.0	7.9 ± 9.9**
SBP delta (%)	2.9 ± 9.5	4.8 ± 12.7
DBP delta (%)	3.7 ± 9.8	9.1 ± 13.3**

The between-device absolute and percent differences separately for the day and the night time, for the entire cohort (lower panel). SBP: systolic blood pressure; DBP: diastolic blood pressure; *p < 0.05; **p < 0.01.