A new approach for blood pressure estimation based on phonocardiogram
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Continuous and non-invasive measurement of blood pressure (BP) is of great importance particularly for patients in critical state. To achieve continuous and cuffless 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 paper proposes a new approach to estimate blood pressure through PCG signal by exploring the correlation between PTT and diastolic duration (S21). In this purpose, an artificial 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 measured and 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 compared to the commercial blood pressure device was in the order of \(6.48 \pm 4.48\) mmHg and \(3.91 \pm 2.58\) mmHg, respectively, which are very close to the AAMI standard, \(5 \pm 8\) mmHg. This shows the feasibility of estimating of blood pressure using PCG.
KeywordsBlood pressure Systolic duration Diastolic duration Phonocardiogram signal PCG Pulse transit time PTT
This research was partially supported by Boumerdes university-Algeria. We thank our colleagues from both Tlemcen university and boumerdes university who provided insight and expertise that greatly assisted the research.
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Conflict of interest
The authors declare that they have no conflict of interest.
All procedures performed in these studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the Helsinki declaration and its later amendments or comparable ethical standards. The following ethical issues were honored
The participants were informed about the purpose of the study and their participation. The participants were also informed that their participation was voluntary and that they were free to withdraw their participation at any time.
Confidentiality and Anonymity
In order to ensure confidentiality and anonymity, the identity ofthe participants was kept anonymous. To this effect, a fictitiousnames were used.
was sought from the department principal to allow the use ofnecessery materials needed for the succes of our experiments.
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