Biophysical modeling of wave propagation phenomena: experimental determination of pulse wave velocity in viscous fluid-filled elastic tubes in a gravitation field

Žikić, Dejan; Stojadinović, Bojana; Nestorovic, Zorica

doi:10.1007/s00249-019-01376-1

Cited by 5 publications

(2 citation statements)

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“…The authors of [ 68 ] proposed a mathematical model for BP for different age groups. The authors of [ 184 ] developed a biophysical model of CVS simulating blood flow in the upright position of the body in order to investigate the effect of gravity on the PWV. The authors of [ 69 ] investigated the propagation of pulses through an elastic tube filled with viscous fluid under initial pressure using Navier–Stokes equations.…”

Section: Contact-based Bp Measurement From Ppg Signalsmentioning

confidence: 99%

Blood Pressure Measurement: From Cuff-Based to Contactless Monitoring

et al. 2022

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Blood pressure (BP) determines whether a person has hypertension and offers implications as to whether he or she could be affected by cardiovascular disease. Cuff-based sphygmomanometers have traditionally provided both accuracy and reliability, but they require bulky equipment and relevant skills to obtain precise measurements. BP measurement from photoplethysmography (PPG) signals has become a promising alternative for convenient and unobtrusive BP monitoring. Moreover, the recent developments in remote photoplethysmography (rPPG) algorithms have enabled new innovations for contactless BP measurement. This paper illustrates the evolution of BP measurement techniques from the biophysical theory, through the development of contact-based BP measurement from PPG signals, and to the modern innovations of contactless BP measurement from rPPG signals. We consolidate knowledge from a diverse background of academic research to highlight the importance of multi-feature analysis for improving measurement accuracy. We conclude with the ongoing challenges, opportunities, and possible future directions in this emerging field of research.

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Section: Contact-based Bp Measurement From Ppg Signalsmentioning

confidence: 99%

Blood Pressure Measurement: From Cuff-Based to Contactless Monitoring

et al. 2022

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“…The proper medical diagnosis as well as the cardiovascular research, depends from biophysical understanding of arterial hemodynamics, especially from pressure and blood flow waveforms conditions ( Willemet and Alastruey, 2015 ; Jozwiak et al, 2018 ). More precisely, the blood viscosity, elasticity of the arterial wall, the thickness of the wall, the internal pressure, the blood density, the influence of gravity and body position can be recognized as main biophysical characteristics of blood propagation in vessel ( Secomb, 2016 ; Žikić et al, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Using the photoplethysmography method to monitor age-related changes in the cardiovascular system

Djurić,

Žikić,

Nestorović

et al. 2023

Front. Physiol.

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Introduction: Aging is a physiological process characterized by progressive changes in all organ systems. In the last few decades, the elderly population has been growing, so the scientific community is focusing on the investigation of the aging process, all in order to improve the quality of life in elderly. One of the biggest challenges in studying the impact of the aging on the human body represents the monitoring of the changes that inevitably occur in arterial blood vessels. Therefore, the medical community has invested a great deal of effort in studying and discovering new methods and tools that could be used to monitor the changes in arterial blood vessels caused by the aging process. The goal of our research was to develop a new diagnostic method using a photoplethysmographic sensor and to examine the impact of the aging process on the cardiovascular system in adults. Long-term recorded arterial blood flow waveforms were analyzed using detrended fluctuation analysis.Materials and Methods: The study included 117 respondents, aged 20–70 years. The waveform of the arterial blood flow was recorded for 5 min, with an optical sensor placed above the left common carotid artery, simultaneously with a single-channel ECG. For each cardiac cycle, the blood flow amplitude was determined, and a new time series was formed, which was analyzed non-linearly (DFA method). The values of the scalar coefficients α1 and α2, particularly their ratio (α1/α2) were obtained, which were then monitored in relation to the age of the subjects.Result: The values of the scalar ratio (α1/α2) were significantly different between the subjects older and younger than 50 years. The value of the α1/α2 decreased exponentially with the aging. In the population of middle-aged adults, this ratio had a value around 1, in young adults the value was exclusively higher than 1 and in older adults the value was exclusively lower than 1.Conclusion: The results of this study indicated that the aging led to a decrease in the α1/α2 in the population of healthy subjects. With this non-invasive method, changes in the cardiovascular system due to aging can be detected and monitored.

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Regional Biophysics Conference: RBC2018

Arsov

Koklic

2019

Eur Biophys J

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Biophysical modeling of wave propagation phenomena: experimental determination of pulse wave velocity in viscous fluid-filled elastic tubes in a gravitation field

Cited by 5 publications

References 10 publications

Blood Pressure Measurement: From Cuff-Based to Contactless Monitoring

Blood Pressure Measurement: From Cuff-Based to Contactless Monitoring

Using the photoplethysmography method to monitor age-related changes in the cardiovascular system

Regional Biophysics Conference: RBC2018

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