Simplified Structural Textile Respiration Sensor Based on Capacitive Pressure Sensing Method

Min, Se Dong; Yun, Yonghyeon; Shin, Hyunki

doi:10.1109/jsen.2014.2327991

Cited by 90 publications

(17 citation statements)

References 17 publications

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“…Respiration rate holds a significant role among the four and is often regarded as a better performance parameter to distinguish various clinical patients [8], [9]. Any deviations from the normal breath rate of 12-20 times per minute may be caused due to the vivid clinical conditions like asthma, pneumonia, anaemia, cardiac arrest, etc [10], [11]. Therefore, it is imperative to have a continuous human respiration monitoring system to detect clinical patients.…”

Section: Introductionmentioning

confidence: 99%

Flexible, Highly Sensitive Paper-Based Screen Printed MWCNT/PDMS Composite Breath Sensor for Human Respiration Monitoring

2021

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Accurate measurement and monitoring of respiration is vital in patients affected by severe acute respiratory syndrome coronavirus -2 (SARS-CoV-2). Patients with severe chronic diseases and pneumonia need continuous respiration monitoring and oxygenation support. Existing respiratory sensing techniques require direct contact with the human body along with expensive and heavy Holter monitors for continuous real-time monitoring. In this work, we propose a low-cost, non-invasive and reliable paper-based wearable screen printed sensor for human respiration monitoring as an effective alternative of existing sensing systems. The proposed sensor was fabricated using traditional screen printing of multi-walled carbon nanotubes (MWCNTs) and polydimethylsiloxane (PDMS) composite based interdigitated electrodes on paper substrate. The paper substrate was used as humidity sensing material of the sensor. The hygroscopic nature of paper during inhalation and exhalation causes a change in dielectric constant, which in turn changes the capacitance of the sensor. The composite interdigitated electrode configuration exhibited better response times with a rise time of 1.178s being recorded during exhalation and fall time of 0.88s during inhalation periods. The respiration rate of sensor was successfully examined under various breathing conditions such as normal breathing, deep breathing, workout, oral breathing, nasal breathing, fast breathing and slow breathing by employing it in a wearable mask, a mandatory wearable product during the current COVID-19 pandemic situation.Thus, the above proposed sensor may hold tremendous potential in wearable/flexible healthcare technology with good sensitivity, stability, biodegradability and flexibility at this time of need.

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Section: Introductionmentioning

confidence: 99%

Flexible, Highly Sensitive Paper-Based Screen Printed MWCNT/PDMS Composite Breath Sensor for Human Respiration Monitoring

2021

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“…Wearable products contain various types of sensors integrated in watches, wrist bands, belts, garments, and textiles or directly applied on the skin. Sensors for health-related applications are capable of monitoring physiological parameters like electrocardiography (ECG) [3], electromyography [4], electroencephalography [5], temperature [6], and respiration rate [7]. Among these, ECG monitoring is the most common application area of textile-based sensors.…”

Section: Introductionmentioning

confidence: 99%

Development of Washable Silver Printed Textile Electrodes for Long-Term ECG Monitoring

Nigusse

Malengier

Mengistie

et al. 2020

Sensors

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Long-term electrocardiography (ECG) monitoring is very essential for the early detection and treatment of cardiovascular disorders. However, commercially used silver/silver chloride (Ag/AgCl) electrodes have drawbacks, and these become more obvious during long-term signal monitoring, making them inconvenient for this use. In this study, we developed silver printed textile electrodes from knitted cotton and polyester fabric for ECG monitoring. The surface resistance of printed electrodes was 1.64 Ω/sq for cotton and 1.78 Ω/sq for polyester electrodes. The ECG detection performance of the electrodes was studied by placing three electrodes around the wrist where the electrodes were embedded on an elastic strap with Velcro. The ECG signals collected using textile electrodes had a comparable waveform to those acquired using standard Ag/AgCl electrodes with a signal to noise ratio (SNR) of 33.10, 30.17, and 33.52 dB for signals collected from cotton, polyester, and Ag/AgCl electrodes, respectively. The signal quality increased as the tightness of the elastic strap increased. Signals acquired at 15 mmHg pressure level with the textile electrodes provided a similar quality to those acquired using standard electrodes. Interestingly, the textile electrodes gave acceptable signal quality even after ten washing cycles.

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“…Other breath monitoring solutions, still based on optical fiber, are also being considered [16,17]. Piezo resistive strain sensors [18], paper-based humidity sensors [19], textile capacitive respiration sensors [20], accelerometers [21,22], resistive strain gauges [23,24], dew-based sensors [25,26], flow meters [21,27], and magnetic induction coils [28] are also largely considered in the literature. However, the above cited systems are able to monitor exclusively breath activity.…”

Section: Introductionmentioning

confidence: 99%

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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Simplified Structural Textile Respiration Sensor Based on Capacitive Pressure Sensing Method

Cited by 90 publications

References 17 publications

Flexible, Highly Sensitive Paper-Based Screen Printed MWCNT/PDMS Composite Breath Sensor for Human Respiration Monitoring

Flexible, Highly Sensitive Paper-Based Screen Printed MWCNT/PDMS Composite Breath Sensor for Human Respiration Monitoring

Development of Washable Silver Printed Textile Electrodes for Long-Term ECG Monitoring

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

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