Flexible photoplethysmographic sensing devices for intelligent medical treatment

Wu, Weitong; Wang, Lili; Shen, Guozhen

doi:10.1039/d2tc03318f

Cited by 6 publications

(5 citation statements)

References 126 publications

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“…It helps protect internal optical components while allowing light to pass through effectively. Encapsulants such as silica gel [ 242 ] and polyurethane [ 243 ] provide strong adhesion, chemical resistance, and mechanical strength. They play a crucial role in protecting sensors.…”

Section: Methodsmentioning

confidence: 99%

Applications of flexible electronics related to cardiocerebral vascular system

Lin,

Lei,

Ding

et al. 2023

Materials Today Bio

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Section: Methodsmentioning

confidence: 99%

Applications of flexible electronics related to cardiocerebral vascular system

Lin,

Lei,

Ding

et al. 2023

Materials Today Bio

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“…The literature already shows that respiratory rate and heartbeat can be inferred from ECG signals [28,29]. Similarly, blood pressure can be measured using PPGs [30] and ECGs [22], allowing for a cuffless blood pressure monitoring that is more comfortable for the patient and can be integrated into a biosensor frame. PPG is a non-invasive optical technique from which many physiological parameters can be derived, as it produces a waveform that correlates with circulatory volume in skin tissue.…”

Section: Introductionmentioning

confidence: 99%

Heart Rate Measurement Using the Built-In Triaxial Accelerometer from a Commercial Digital Writing Device

Payette,

Vaussenat,

Cloutier

2024

Sensors

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Currently, wearable technology is an emerging trend that offers remarkable access to our data through smart devices like smartphones, watches, fitness trackers and textiles. As such, wearable devices can enable health monitoring without disrupting our daily routines. In clinical settings, electrocardiograms (ECGs) and photoplethysmographies (PPGs) are used to monitor heart and respiratory behaviors. In more practical settings, accelerometers can be used to estimate the heart rate when they are attached to the chest. They can also help filter out some noise in ECG signals from movement. In this work, we compare the heart rate data extracted from the built-in accelerometer of a commercial smart pen equipped with sensors (STABILO’s DigiPen) to standard ECG monitor readouts. We demonstrate that it is possible to accurately predict the heart rate from the smart pencil. The data collection is carried out with eight volunteers writing the alphabet continuously for five minutes. The signal is processed with a Butterworth filter to cut off noise. We achieve a mean-squared error (MSE) better than 6.685 × 10−3 comparing the DigiPen’s computed Δt (time between pulses) with the reference ECG data. The peaks’ timestamps for both signals all maintain a correlation higher than 0.99. All computed heart rates (HR =60Δt) from the pen accurately correlate with the reference ECG signals.

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“…Especially, the recent development of wearable electronics is leading revolutionary changes of PPG technology toward higher signal quality and clinical applicability based on biocompatible, high-performance, and ultra-lightweight PPG devices. [15] A typical PPG device mainly consists of a light source, a substrate on which the sensing layer (photodetector) is patterned, and a printed circuit board. As shown in Figure 1a, PPG sensors measure the intensity of light transmitted or reflected with respect to the changes in the volume of blood flowing through the blood vessels.…”

Section: Introductionmentioning

confidence: 99%

Systematic Review on Fabrication, Properties, and Applications of Advanced Materials in Wearable Photoplethysmography Sensors

Mathew,

Zheng,

et al. 2024

Adv Elect Materials

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Photoplethysmography (PPG) technology enables the measurement of multiple physiological and psychological parameters with low‐cost wearable sensors and is reshaping modern healthcare. Advanced materials play a vital role in improving reliability and accuracy of PPG sensors. Recently, various advanced materials have been explored to optimize PPG sensor design, while some challenges exist toward large‐scale validation and mass production. This paper focuses on advanced materials applied in the photodetectors, light sources, and circuits of PPG sensors. The materials are categorized into four groups: inorganic, organic, nanomaterials, and hybrid materials. The properties and fabrication processes are summarized. Other technical details including the mode of operation, measurement sites, testing, and validation are discussed. The merits and limitations of the state of the art are highlighted to provide some suggestions for the future development of PPG sensors based on advanced materials.

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Flexible photoplethysmographic sensing devices for intelligent medical treatment

Abstract: The beat frequency, flow rate, and oxygen content of human pulsating blood are important health indicators. For early diagnosis of diseases and real-time monitoring of cardiovascular health in specific practical...

Cited by 6 publications

References 126 publications

Applications of flexible electronics related to cardiocerebral vascular system

Applications of flexible electronics related to cardiocerebral vascular system

Heart Rate Measurement Using the Built-In Triaxial Accelerometer from a Commercial Digital Writing Device

Systematic Review on Fabrication, Properties, and Applications of Advanced Materials in Wearable Photoplethysmography Sensors

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