scholarly journals Bio-Impedance Sensor for Real-Time Artery Diameter Waveform Assessment

Sensors ◽  
2021 ◽  
Vol 21 (24) ◽  
pp. 8438
Author(s):  
Mugeb Al-harosh ◽  
Marat Yangirov ◽  
Dmitry Kolesnikov ◽  
Sergey Shchukin
Keyword(s):  
Blood Pressure ◽  
Real Time ◽  
Blood Pressure Monitoring ◽  
Blood Pressure Measurement ◽  
Pressure Change ◽  
Electrode System ◽  
Analytical Models ◽  
Cell Orientation ◽  
Regular Measurement ◽  
Impedance Sensor

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.

scholarly journals Wearable Piezoelectric-Based System for Continuous Beat-to-Beat Blood Pressure Measurement

Sensors ◽  
2020 ◽  
Vol 20 (3) ◽  
pp. 851 ◽  
Author(s):  
Ting-Wei Wang ◽  
Shien-Fong Lin
Keyword(s):  
Blood Pressure ◽  
Pressure Measurement ◽  
Blood Pressure Monitoring ◽  
Low Cost ◽  
Blood Pressure Measurement ◽  
Pressure Change ◽  
Absolute Error ◽  
Non Invasive ◽  
Blood Pressure Estimation

Non-invasive continuous blood pressure measurement is an emerging issue that potentially can be applied to cardiovascular disease monitoring and prediction. Recently, many groups have proposed the pulse transition time (PTT) method to estimate blood pressure for long-term monitoring. However, the PTT-based methods for blood pressure estimation are limited by non-specific estimation models and require multiple calibrations. This study aims to develop a low-cost wearable piezoelectric-based system for continuous beat-to-beat blood pressure measurement. The pressure change in the radial artery was extracted by systolic and diastolic feature points in pressure pulse wave (PPW) and the pressure sensitivity of the sensor. The proposed system showed a reliable accuracy of systolic blood pressure (SBP) (mean absolute error (MAE) ± standard deviation (SD) 1.52 ± 0.30 mmHg) and diastolic blood pressure (DBP, MAE ± SD 1.83 ± 0.50), and its performance agreed with standard criteria of MAE within 5 mmHg and SD within ±8 mmHg. In conclusion, this study successfully developed a low-cost, high-accuracy piezoelectric-based system for continuous beat-to-beat SBP and DBP measurement without multiple calibrations and complex regression analysis. The system is potentially suitable for continuous, long-term blood pressure-monitoring applications.

Study on Cuff-Less Blood Pressure Measurement Based on Electrocardiography and Photoplethysmography Signal

2019 ◽  
Vol 2 (3) ◽  
pp. 206-214
Author(s):  
Putri Indes Oktabriani ◽  
Fuad Ughi ◽  
Aulia Arif Iskandar
Keyword(s):  
Blood Pressure ◽  
Pressure Measurement ◽  
Blood Pressure Monitoring ◽  
Blood Pressure Measurement ◽  
Ecg Signal ◽  
Optimum Location ◽  
Blood Pressure Monitor ◽  
Pressure Monitor ◽  
Left Hand ◽  
Measure Blood Pressure

The continuous blood pressure measurement research is widely known for helpingthe development of ambulatory blood pressure monitoring where it measures blood pressureevery 15 to 30 minutes throughout the day. The cuff is a problem for the patient withAmbulatory Blood Pressure Monitor. It can make a person feel uncomfortable and must staystill when the cuff starts to inflate. It is limiting and disturbing their daily activity when thedevice is starting to measure the blood pressure. Blood pressure measurement without cuff isbeing proposed in this research, called cuff-less blood pressure measurement. It will be based onPhotoplethysmography (PPG) and Electrocardiography (ECG) signal analysis. ECG (Lead 1,Lead 2, and Lead 3) with PPG signal produced from index finger on the left hand are comparedand analyzed. Then the relation of PPG and ECG signal and the optimum location for daily usecan be obtained. The optimum location will be based on the electrode’s position that producedthe optimum ECG lead Signal to measure blood pressure. Based on the result, PPG and ECGsignal have a linear relation with Blood Pressure Measurement and Lead 1 is more stable inproducing the ECG signal. The equation from Lead 1 appeared as one of the optimum equationsfor measuring Systolic Blood Pressure (SBP) or Diastolic Blood Pressure (DBP).

scholarly journals Increase of Short-Term Heart Rate Variability Induced by Blood Pressure Measurements during Ambulatory Blood Pressure Monitoring

2017 ◽  
Vol 2017 ◽  
pp. 1-5 ◽  
Author(s):  
Attila Frigy ◽  
Annamária Magdás ◽  
Victor-Dan Moga ◽  
Ioana Georgiana Coteț ◽  
Miklós Kozlovszky ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Ambulatory Blood Pressure ◽  
Pressure Measurement ◽  
Blood Pressure Monitoring ◽  
Blood Pressure Measurement ◽  
Pressure Measurements ◽  
Pressure Monitoring ◽  
Short Term

Objective.The possible effect of blood pressure measurements per se on heart rate variability (HRV) was studied in the setting of concomitant ambulatory blood pressure monitoring (ABPM) and Holter ECG monitoring (HM).Methods.In 25 hypertensive patients (14 women and 11 men, mean age: 58.1 years), 24-hour combined ABPM and HM were performed. For every blood pressure measurement, 2-minute ECG segments (before, during, and after measurement) were analyzed to obtain time domain parameters of HRV: SDNN and rMSSD. Mean of normal RR intervals (MNN), SDNN/MNN, and rMSSD/MNN were calculated, too. Parameter variations related to blood pressure measurements were analyzed using one-way ANOVA with multiple comparisons.Results.2281 measurements (1518 during the day and 763 during the night) were included in the analysis. Both SDNN and SDNN/MNN had a constant (the same for 24-hour, daytime, and nighttime values) and significant change related to blood pressure measurements: an increase during measurements and a decrease after them (p<0.01for any variation).Conclusion.In the setting of combined ABPM and HM, the blood pressure measurement itself produces an increase in short-term heart rate variability. Clarifying the physiological basis and the possible clinical value of this phenomenon needs further studies.

scholarly journals Justification of the model for improvement of activities for hypertension early diagnosis and prevention

2016 ◽  
Vol 97 (5) ◽  
pp. 755-763
Author(s):  
V A Reshetnikov ◽  
V V Kozlov ◽  
V V Royuk ◽  
N O Sokolov
Keyword(s):  
Blood Pressure ◽  
Early Diagnosis ◽  
High Blood Pressure ◽  
Hospital Admissions ◽  
Blood Pressure Monitoring ◽  
Blood Pressure Measurement ◽  
Office Workers ◽  
City Hospital ◽  
Working Age ◽  
Prevention Of Hypertension

Aim. To develop medical and organizational measures to optimize the early diagnosis and prevention of hypertension complications.Methods. A study of the hypertension incidence in population of Krasnogorsk city based on the analysis of report forms was performed. A questionnaire survey of 400 office workers of working age for the presence of high blood pressure was conducted.Results. It was found that, despite the downward trend in the prevalence and incidence of hypertension in population served by Krasnogorsk City Hospital №1, as well as the decrease in the relative frequency of hospital admissions of patients with hypertension in 2011-2015, mortality due to hypertension-related causes does not decrease. The results of the survey and blood pressure measurement in 400 office workers of working age have shown that only 30.8% of respondents regularly monitor the blood pressure, and women 3.5 times more often than men. In 14.5% of examined persons, who claimed that they have no high blood pressure, unstable blood pressure, in 19.1% - high blood pressure is detected.Conclusion. As an important measure for the early detection and correction of hypertension, the organization of units for measuring blood pressure at workplaces in organizations and institutions should be considered. Heads of organizations and institutions, in agreement and cooperation with the healthcare authorities, are recommended to organize units for measuring blood pressure at the personnel workplace and purchase devices for measuring blood pressure. Local healthcare authorities should organize trainings of the institutions personnel on self-measured blood pressure monitoring by means of collective actions involving volunteer health professionals in health centers, and in organizations and institutions, if possible.

Detection of Behaviors Related to Blood Pressure Change Using 6-Axis Kinetic Sensor

2013 ◽  
Author(s):  
Tingting Dai ◽  
Guillaume Lopez ◽  
Shin’ichi Warisawa ◽  
Ichiro Yamada
Keyword(s):  
Blood Pressure ◽  
Blood Pressure Monitoring ◽  
Pressure Change ◽  
Clinical Activity ◽  
Pressure Monitoring ◽  
Recognition Method ◽  
Short Term ◽  
Heart Attacks ◽  
Record Card ◽  
Pressure Changes

Continuous blood pressure monitoring in daily life could contribute to early detection of strokes and heart attacks, as well as healthcare promotion. Understanding of what patients were doing when their blood pressure changes occurred would be much more helpful to check the causes of blood pressure changes. However, at present, patients should record their activities by filling the clinical activity record card. The activity record card is so inconvenient that handwriting all the activities becomes a burden and causes inaccuracy. Moreover, it is not able to record posture changes that are a major factor related to short-term blood pressure changes. From these reasons, automatic activities recognition method is strongly required.

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