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A new approach for blood pressure estimation based on phonocardiogram
Tahar Omari,Fethi Bereksi-Reguig 대한의용생체공학회 2019 Biomedical Engineering Letters (BMEL) Vol.9 No.3
Continuous and non-invasive measurement of blood pressure (BP) is of great importance particularly for patients in criticalstate. To achieve continuous and cuffl ess BP monitoring, pulse transit time (PTT) has been reported as a potential parameter. Nevertheless, this approach remains very sensitive, cumbersome and disagreeable in ambulatory measurement. This paperproposes a new approach to estimate blood pressure through PCG signal by exploring the correlation between PTT anddiastolic duration (S21). In this purpose, an artifi cial neural network was developed using as input data: (systolic duration,diastolic duration, heart rate, sex, height and weight). According to the NN decision, the mean blood pressure was measuredand consequently the systolic and the diastolic pressures were estimated. The proposed method is evaluated on 37 subjects. The obtained results are satisfactory, where, the error in the estimation of the systolic and the diastolic pressures comparedto the commercial blood pressure device was in the order of 6 .48 ± 4.48 mmHg and 3 .91 ± 2.58 mmHg, respectively, whichare very close to the AAMI standard, 5 ± 8 mmHg. This shows the feasibility of estimating of blood pressure using PCG.
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