Bio-Impedance Sensor for Real-Time Artery Diameter Waveform Assessment.

Mugeb Al-harosh,Dmitry Kolesnikov,Marat Yangirov,Sergey Shchukin

doi:10.3390/s21248438

Mugeb Al-harosh, Dmitry Kolesnikov + Show 2 more

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https://doi.org/10.3390/s21248438

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Abstract

The real-time artery diameter waveform assessment during cardio cycle can allow the measurement of beat-to-beat pressure change and the long-term blood pressure monitoring. The aim of this study is to develop a self-calibrated bio-impedance-based sensor, which can provide regular measurement of the blood-pressure-dependence time variable parameters such as the artery diameter waveform and the elasticity. This paper proposes an algorithm based on analytical models which need prior geometrical and physiological patient parameters for more appropriate electrode system selection and hence location to provide accurate blood pressure measurement. As a result of this study, the red cell orientation effect contribution was estimated and removed from the bio-impedance signal obtained from the artery to keep monitoring the diameter waveform correspondence to the change of blood pressure.

Highlights

IntroductionThe arterial blood pressure parameters tend to change over time, so long-term monitoring helps to provide more accurate evaluation of the patient’s condition, as well as beat-by-beat measurement of blood pressure, which could offer several advantages toward the early detection and the patient response to specific therapy and medication [5]
This work presents a new method for real-time arterial diameter waveform estimation, which can improve the accuracy of blood pressure measurement
This method is based on an electrical bio-impedance signal obtained from an artery using appropriate electrode system with dry electrodes

Summary

Introduction

The arterial blood pressure parameters tend to change over time, so long-term monitoring helps to provide more accurate evaluation of the patient’s condition, as well as beat-by-beat measurement of blood pressure, which could offer several advantages toward the early detection and the patient response to specific therapy and medication [5]. The blood pressure assessment by sphygomomanometry is the widely used method in medical practice due to its simplicity and sufficient accuracy; this method cannot provide long-term measurements due to frequent occlusion [11]. The optical based methods are unreliable for obese patients, while the tonometry methods require a specific anatomical structure with superficial artery supported by bone and so is sensitive to the device placement [15,16,17]

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