Paper-Based Electronics Using Graphite and Silver Nanoparticles for Respiration Monitoring

Balakrishnan, V.R.; Dinh, Toan; Foisal, Abu Riduan Md; Nguyen, Thanh; Phan, Hoang‐Phuong; Dao, Dzung Viet; Nguyen, Nam‐Trung

doi:10.1109/jsen.2019.2939567

Cited by 35 publications

(23 citation statements)

References 56 publications

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“…DR is calculated based on the capacitance change in every respiration state. Breathing index (BI) is defined as the ratio of breath rate to the peak-to-peak breath amplitude under light and vigorous exercises and is given by Equ.4 as following [39], [55]:…”

Section: Resultsmentioning

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: Resultsmentioning

confidence: 99%

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

2021

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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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“…1D, Güder et al [10] fixed the paper-based sensor into the mask, which was combined with traditional electronic devices to transmit respiratory data to nearby smart phones or tablets for processing, so as to realize real-time monitoring of breathing and breathing. Balakrishnan et al [31] also fixed the sensor into the mask, and prepared a wearable device for long-term continuous monitoring of respiratory status. Zhang et al [32] integrated the sensor into the belt and prepared a wearable breathing sensor based on triboelectric effect.…”

Section: Wearable Sensor With Additional Devicementioning

confidence: 99%

Research and Application Progress of Intelligent Wearable Devices

Liu

Han

et al. 2021

Chinese Journal of Analytical Chemistry

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Paper-Based Electronics Using Graphite and Silver Nanoparticles for Respiration Monitoring

Cited by 35 publications

References 56 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

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

Research and Application Progress of Intelligent Wearable Devices

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