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2018 ; 8
(1
): 7298
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Cuffless blood pressure estimation using only a smartphone
#MMPMID29740088
Matsumura K
; Rolfe P
; Toda S
; Yamakoshi T
Sci Rep
2018[May]; 8
(1
): 7298
PMID29740088
show ga
Cuffless blood pressure (BP) measurement is an all-inclusive term for a method
that aims to measure BP without using a cuff. Recent cuffless technology has made
it possible to estimate BP with reasonable accuracy. However, mainstream methods
require an electrocardiogram and photoplethysmogram measurements, and frequent
calibration procedures using a cuff sphygmomanometer. We therefore developed a
far simpler cuffless method, using only heart rate (HR) and modified normalized
pulse volume (mNPV) that can be measured using a smartphone, based on the
knowledge that ln BP?=?ln cardiac output (CO)?+?ln total peripheral resistance
(TPR), where CO and TPR are correlated with HR and mNPV, respectively. Here, we
show that mean arterial pressure (MAP), systolic BP (SBP), and diastolic BP (DBP)
could be estimated using the exponential transformation of linear polynomial
equation, (a?×?ln HR)?+?(b?×?ln mNPV)?+?constant, using only a smartphone, with
an accuracy of R?>?0.70. This implies that our cuffless method could convert a
large number of smartphones or smart watches into simplified sphygmomanometers.
free
free
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