Background: Smart devices, which are able to measure the
blood pressure (BP), are valuable for hypertension or heart failure management
using digital technology. Data regarding their diagnostic accuracy in
comparison to standard non-invasive measurement in accordance to Riva-Rocci are
sparse. This study compares a wearable Watch-type BP Monitor (Omron
HeartGuide), a conventional ambulatory BP monitor and auscultatory sphygmomanometry.
Patients and Methods: 159
consecutive patients performed observed single measurements with the smart
device compared to the auscultatory
sphygmomanometry (n=109, 56 female, age 69.8±13.6 years) or multiple measurements during 24 hours compared to a conventional
ambulatory BP monitor (n=50, 23 female, age 52.3±14.5 years). The 2 BP monitoring devices were simultaneously worn on the same arm
throughout the monitoring period, measurements between the two devices were
performed with a delay of 60 seconds.
Results: The intraclass correlation coefficient (ICC) according to Cicchetti in the
single measurement group between the difference and the mean values of the
Omron HeartGuide and the conventional method was “very good” for
systolic blood pressure (SBP) and “good” for diastolic blood pressure (DBP). According
to Koo/li ICC was “good” for the SBP and “average” for DBP. There was no
correlation between the difference of the SBP or DBP of both devices (Table 1).
The ICC according to Cicchetti between the Omron HeartGuide and the ambulatory
BP monitor for long-term measurement was “very good” for SBP and DBP. ICC
according to Koo/li was “good” for SBP and DBP. There was no correlation
between the difference of the SBP or DBP of both devices (Table 1).
Conclusion: The Omron HeartGuide device provides
comparable BP values compared to standard devices for single and long-term measurement
and is a suitable smartwatch for monitoring or controlling BP with highly
reproduceable BP values compared to standard methods in clinical use. The
device may allow telemetric treatment observation and improvement in an
outpatient setting.
|
Single blood pressure
measurement (n=109 patients)
|
|
|
Omron
|
RR
|
Diff. (RR- WBPM)
|
ICC
|
|
SBP, mmHg
|
132.96 ± 21.10
|
127 ± 19.18
|
5.8 ± 17.1
|
0.765
|
|
DBP, mmHg
|
75.28 ± 11.29
|
76.41 ± 14.04
|
0.8 ± 11.7
|
0.732
|
|
Long-term blood
pressure measurement (n=811 pairs)
|
|
|
Omron
|
ABPM
|
Diff. (ABPM- WBPM)
|
ICC
|
|
SBP, mmHg
|
119.89 ± 15.05
|
120.61 ± 15.59
|
0.72 ± 1.44
|
0.880
|
|
DBP, mmHg
|
71.28± 9.56
|
75.54 ± 10.32
|
4.27 ± 0.97
|
0.829
|
Table 1 (SBP=systolic blood pressure;
DBP=diastolic blood pressure; RR=Riva-Rocci; WBPM=wearable blood pressure
monitor; ICC=intraclass correlation coefficient; ABPM=ambulatory blood pressure
monitor)