Simultaneous piezoelectric noninvasive detection of multiple vital signs

Allataifeh, Areen; Ahmad, Mahmoud Al

doi:10.1038/s41598-019-57326-6

Cited by 25 publications

(13 citation statements)

References 31 publications

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“…In [35] the fiber optic-based system was assessed only in supine position and it is not wearable, while in [36] measurement error analysis was not performed. A metrological analysis, instead, is reported in [4], where a novel piezoelectric-based approach is investigated and errors lower than 5% were found counting the heartbeat and the breaths taken in one minute. However, comparing the sensor with conventional equipment and methods the average error ± STD (%) is 10 ± 6 and 6 ± 3.5 in respiration and heartbeat rate, respectively.…”

Section: Discussionmentioning

confidence: 99%

“…Real-time, continuous and non-invasive measurement of physiological signals represents a key element for numerous applications, from patient monitoring in hospitals to home therapy [1], medical assistance and surveillance for the elderly [2], and athletic performance monitoring [3]. Nowadays, measuring vital signs continuously and non-invasively can be an invaluable tool for physicians that can make timely decisions and better choices when long-term patient data are available, preventing diseases and enhancing quality of life whilst reducing the costs of health care [4]. In particular, continuous cardio-respiratory monitoring can be useful for early detection of deteriorating patients, and improve patient safety by reducing the incidence of critical events [5].…”

Section: Introductionmentioning

confidence: 99%

“…In [36] a wearable FBG-based system for heart rate monitoring is presented but its measurement uncertainty has not been analyzed in detail. In [4] a simultaneous piezoelectric noninvasive detection that incorporates the cardiac and respiratory activities is developed, and the convolution theory with Fourier transform are applied to extract the corresponding cardiac activity signal from the respiratory signal. Measurements of electrocardiogram (ECG) and respiratory signals are presented [37] using capacitive sheet electrodes, but only when the individuals maintain ordinary body positions such as supine position and left and right lateral positions.…”

Section: Introductionmentioning

confidence: 99%

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Wearable Belt With Built-In Textile Electrodes for Cardio—Respiratory Monitoring

Piuzzi

Pisa

Pittella

et al. 2020

Sensors

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Unobtrusive and continuous monitoring of vital signs is becoming more and more important both for patient monitoring in the home environment and for sports activity tracking. Even though many gadgets and clinical systems exist, the need for simple, low-cost and easily applicable solutions still remains, especially in view of a more widespread use within everyone’s reach. The paper presents a fully wearable and wireless sensorized belt, suitable to simultaneously acquire respiratory and cardiac signals employing a single acquisition channel. The adopted method relies on a 50-kHz current injected in the subject thorax through a couple of textile electrodes and on envelope detection of the trans-thoracic voltage acquired from a couple of different embedded electrodes. The resulting signal contains both the baseband electrocardiogram (ECG) signal and the trans-thoracic impedance signal, which encodes respiratory acts. The two signals can be easily separated through suitable filtering and the cardio–respiratory rates extracted. The proposed solution yields performances comparable to those of a spirometer and a two-lead ECG. The whole system, with a realization cost below 100 €, a wireless interface, and several hours (or even days) of autonomy, is a suitable candidate for everyday use, especially if complemented by motion artifact removal techniques, currently under implementation.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Wearable Belt With Built-In Textile Electrodes for Cardio—Respiratory Monitoring

Piuzzi

Pisa

Pittella

et al. 2020

Sensors

View full text Add to dashboard Cite

show abstract

“…This is a potentially lucrative area, given the popularity of smart watches and the increased use of technology in professional sport [ 129 , 130 ], an area where considerable interest has been generated. For example, Allataifeh et al have developed and tested a method using a lead zirconium titanate sensor, to deconvolute the strain caused by breathing from the vibrations of the heartbeat, allowing simultaneous non-invasive monitoring of vital signs [ 131 ].…”

Section: Mechanical Biosensorsmentioning

confidence: 99%

Biosensors Based on Mechanical and Electrical Detection Techniques

Chalklen

Jing

Kar‐Narayan

2020

Sensors

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Biosensors are powerful analytical tools for biology and biomedicine, with applications ranging from drug discovery to medical diagnostics, food safety, and agricultural and environmental monitoring. Typically, biological recognition receptors, such as enzymes, antibodies, and nucleic acids, are immobilized on a surface, and used to interact with one or more specific analytes to produce a physical or chemical change, which can be captured and converted to an optical or electrical signal by a transducer. However, many existing biosensing methods rely on chemical, electrochemical and optical methods of identification and detection of specific targets, and are often: complex, expensive, time consuming, suffer from a lack of portability, or may require centralised testing by qualified personnel. Given the general dependence of most optical and electrochemical techniques on labelling molecules, this review will instead focus on mechanical and electrical detection techniques that can provide information on a broad range of species without the requirement of labelling. These techniques are often able to provide data in real time, with good temporal sensitivity. This review will cover the advances in the development of mechanical and electrical biosensors, highlighting the challenges and opportunities therein.

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“…Development of diagnostic techniques for early detection of cardiovascular diseases increases the survival rate [1]. In addition, the continuous and non-invasive measurement of vital signs can be an invaluable tool for physicians who can make timely decisions and make better choices when long-term patient data are available, prevent disease and reduce the costs of healthcare while improving quality of life [2,3].…”

Section: Introductionmentioning

confidence: 99%

Low Cost Non-İnvasive Portable Monitor Platform for Cardiac Biopotential and Transthoracic Impedance Measurements

Köksal

Haberal

2021

Preprint

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Purpose Simultaneous monitoring of ECG and thoracic electrical bioimpedance (TEB) is important in evaluating cardiovascular performance. TEB is a non-invasive technique based on measuring the impedance value that changes in the chest area depending on the heartbeat. Within the framework of this study, it can be used in home monitoring and biotelemetry applications to measure thoracic electrical bioimpedance (TEB), ECG and ICG. Methods Within the scope of this study, a four-electrode TEB measurement system was designed and built using the Raspberry Pi single board computer and its original monitor, ESP32 and EVAL-ADAS1000SDZ evaluation board. With the designed system, ECG and thoracic impedance measurements at 50 kHz current frequency were taken as real-time over a single channel. Delta_Z and ICG signals were created from thoracic impedance values with the developed software.ResultsWhile the thoracic impedance value varies between 15-45 Ω, the 67 thoracic impedance value measured with the designed system is approximately 1000 times the 68 reference value. The impedance change in the thoracic region was measured with the designed 69 system between 0.1-0.2 Ω values, and the compatibility of these values with reference values was 70 determined. While the reference value of the dZ / dt signal is 0.8 - 3.5 Ω / s, this value is between 2.3 - 71 5.3 Ω / s in the measurements taken with the designed system.Conclusion The prototype is achieved in detecting small changes in the thoracic impedance signal. The prototype is cheap, portable, small-sized and medically safe, so it is suitable for home care services and clinics. In addition, the developed system can be adapted to wearable technology. In order to increase the success of the system, the impedances values added to the thoracic impedance value should be determined and a calibration procedure should be established.

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Simultaneous piezoelectric noninvasive detection of multiple vital signs

Cited by 25 publications

References 31 publications

Wearable Belt With Built-In Textile Electrodes for Cardio—Respiratory Monitoring

Wearable Belt With Built-In Textile Electrodes for Cardio—Respiratory Monitoring

Biosensors Based on Mechanical and Electrical Detection Techniques

Low Cost Non-İnvasive Portable Monitor Platform for Cardiac Biopotential and Transthoracic Impedance Measurements

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