Availability and variations of cardiac activity in the case of measuring the bioimpedance of wrist

Metshein, Margus; Annus, Paul; Land, Raul; Min, Mart; Aabloo, Alvo

doi:10.1109/i2mtc.2018.8409684

Cited by 12 publications

(5 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While it is well known that the

Z ( t ) is fairly low (but consistent and measurable) in the case of the radial artery (e.g., [ 13 ]), the performance of the posterior tibial artery was a surprise. This is contrary to [ 11 ], where the performance of radial and ulnar arteries outperforms the tibial and carotid arteries.…”

Section: Discussionmentioning

confidence: 99%

“…It has been shown in the literature that specific (like focused impedance method) and shifted electrode con-figurations relative to the artery could perform better [30]. However, the current research relies on a standard in-line four electrode configuration to be comparable with the vast amount of published research reports (also of our research group [13,31]).…”

Section: Features Of Regional Impedance Measurementsmentioning

confidence: 91%

“…For the characterization of the acquired signals, the approach of calculating the time-varying change of impedance (Δ Z ( t )) was applied—represented by Equation ( 1 ). Specifically, the Z of a body can be expected to consist of the invariable impedance of the local volume

and Δ Z ( t ), caused by pulse wave [ 13 ] (expressing in Ohms (

)):

…”

Section: Methodsmentioning

confidence: 99%

“…The monitoring of the signal of EBI [ 11 ] and PPG (an excellent review is available in [ 12 ]) from peripheral locations has been reported in the literature before. While the non-invasive measurement of EBI is focused generally on a certain artery [ 13 , 14 ] or the whole body [ 15 ], the PPG can be acquired from anywhere where the perfusion of the circulation is present. In the current work, the the signal of reflection mode PPG (rPPG) signals were considered as references to the EBI.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Sensor-Location-Specific Joint Acquisition of Peripheral Artery Bioimpedance and Photoplethysmogram for Wearable Applications

Metshein,

Abdullayev,

Gautier

et al. 2023

Sensors

Self Cite

View full text Add to dashboard Cite

Background: Cardiovascular diseases (CVDs), being the culprit for one-third of deaths globally, constitute a challenge for biomedical instrumentation development, especially for early disease detection. Pulsating arterial blood flow, providing access to cardiac-related parameters, involves the whole body. Unobtrusive and continuous acquisition of electrical bioimpedance (EBI) and photoplethysmography (PPG) constitute important techniques for monitoring the peripheral arteries, requiring novel approaches and clever means. Methods: In this work, five peripheral arteries were selected for EBI and PPG signal acquisition. The acquisition sites were evaluated based on the signal morphological parameters. A small-data-based deep learning model, which increases the data by dividing them into cardiac periods, was proposed to evaluate the continuity of the signals. Results: The highest sensitivity of EBI was gained for the carotid artery (0.86%), three times higher than that for the next best, the posterior tibial artery (0.27%). The excitation signal parameters affect the measured EBI, confirming the suitability of classical 100 kHz frequency (average probability of 52.35%). The continuity evaluation of the EBI signals confirmed the advantage of the carotid artery (59.4%), while the posterior tibial artery (49.26%) surpasses the radial artery (48.17%). The PPG signal, conversely, commends the location of the posterior tibial artery (97.87%). Conclusions: The peripheral arteries are highly suitable for non-invasive EBI and PPG signal acquisition. The posterior tibial artery constitutes a candidate for the joint acquisition of EBI and PPG signals in sensor-fusion-based wearable devices—an important finding of this research.

show abstract

“…While it is well known that the

Section: Discussionmentioning

confidence: 99%

Section: Features Of Regional Impedance Measurementsmentioning

confidence: 91%

and Δ Z ( t ), caused by pulse wave [ 13 ] (expressing in Ohms (

)):

…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Sensor-Location-Specific Joint Acquisition of Peripheral Artery Bioimpedance and Photoplethysmogram for Wearable Applications

Metshein,

Abdullayev,

Gautier

et al. 2023

Sensors

Self Cite

View full text Add to dashboard Cite

show abstract

“…The question, accompanying the planning of electrical measurements of biological objects, is the choice of the parameters that would incorporate the data of interest. In the case of variable biological processes-such as the flow of pulsating blood in arteries-the ratio of change in the volume can be calculated and compared in situ while rejecting the uncertainties this originates from the interface between the skin and electrode [61]. However, when the focus is to measure the absolute value of Z, the object's (i.e., the skin) properties must be considered thoroughly.…”

Section: Used Devicesmentioning

confidence: 99%

Electrical Bioimpedance Analysis for Evaluating the Effect of Pelotherapy on the Human Skin: Methodology and Experiments

Metshein

Tuulik

Tuulik³

et al. 2023

Sensors

Self Cite

View full text Add to dashboard Cite

Background: Pelotherapy is the traditional procedure of applying curative muds on the skin’s surface—shown to have a positive effect on the human body and cure illnesses. The effect of pelotherapy is complex, functioning through several mechanisms, and depends on the skin’s functional condition. The current research objective was to develop a methodology and electrodes to assess the passage of the chemical and biologically active compounds of curative mud through human skin by performing electrical bioimpedance (EBI) analysis. Methods: The methodology included local area mud pack and simultaneous tap water compress application on the forearms with the comparison to the measurements of the dry skin. A custom-designed small-area gold-plated electrode on a rigid printed circuit board, in a tetrapolar configuration, was designed. A pilot study experiment with ten volunteers was performed. Results: Our results indicated the presence of an effect of pelotherapy, manifested by the varying electrical properties of the skin. Distinguishable difference in the measured real part of impedance (R) emerged, showing a very strong correlation between the dry and tap-water-treated skin (r = 0.941), while a poor correlation between the dry and mud-pack-treated skin (r = 0.166) appeared. The findings emerged exclusively in the frequency interval of 10 kHz …1 MHz and only for R. Conclusions: EBI provides a promising tool for monitoring the variations in the electrical properties of the skin, including the skin barrier. We foresee developing smart devices for promoting the exploitation of spa therapies.

show abstract

The Investigation of Bio-impedance Analysis at a Wrist Phantom with Two Pulsatile Arteries

Yu,

Lowe,

Anand

et al. 2023

Cardiovasc Eng Tech

View full text Add to dashboard Cite

Availability and variations of cardiac activity in the case of measuring the bioimpedance of wrist

Cited by 12 publications

References 7 publications

Sensor-Location-Specific Joint Acquisition of Peripheral Artery Bioimpedance and Photoplethysmogram for Wearable Applications

Sensor-Location-Specific Joint Acquisition of Peripheral Artery Bioimpedance and Photoplethysmogram for Wearable Applications

Electrical Bioimpedance Analysis for Evaluating the Effect of Pelotherapy on the Human Skin: Methodology and Experiments

The Investigation of Bio-impedance Analysis at a Wrist Phantom with Two Pulsatile Arteries

Contact Info

Product

Resources

About