Enabling the Unconstrained Epidermal Pulse Wave Monitoring via Finger‐Touching

Wang, Xue; Yang, Jun; Meng, Keyu; He, Qiang; Zhang, Gaoqiang; Zhou, Zhihao; Tan, Xulong; Feng, Zhiping; Sun, Chenchen; Yang, Jin; Wang, Zhong Lin

doi:10.1002/adfm.202102378

Cited by 39 publications

(40 citation statements)

References 64 publications

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“…Wang et al developed a shape-adaptable and ultrawide detect range flexible sensor (UFS). [185] The UFS contains two layers, a PTFE and a PE triboelectric layer, as well as an AgNWs electrode (Figure 7d,e). In addition, multilevel microstructures were modified on the surface of PTFE, with a hexagonal microstructure on the first level and nanowires on the second level.…”

Section: Triboelectric Pressure Sensorsmentioning

confidence: 99%

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Wearable Pressure Sensors for Pulse Wave Monitoring

et al. 2022

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Furthermore, by 2030 this number is expected to rise steadily to 23.6 million. [2] Despite such high mortality rates, most CVD, [3,4] including arteriosclerosis, [5,6] diabetes, [7][8][9][10] myocardial infarction, [11,12] coronary heart disease, [13,14] and hypertension, [15][16][17][18] can be prevented and treated through early diagnosis and long-term monitoring of physiological signaling. Conventional health systems suffer from deficiencies in wearability, wireless technology, lifespan, and stability to maintain a long-term collection of clinical-grade individual health metrics for accurate diagnosis. [19][20][21] As such, promoting the utility of Internet of Things (IoT)-enabled technology in personalized healthcare is still significantly impeded by the need for costeffective and wearing-comfort biomedical devices to continuously provide real-time patient-generated health data. Over the past several decades, significant advances in wearable pressure sensors have been observed, allowing them to noninvasively and continuously detect human physiological and pathological signals. [22][23][24][25][26][27][28][29][30][31][32][33][34][35] These biomedical metrics can then be used to evaluate cardiovascular conditions, providing a personalized health care system with better health outcomes, increased user-friendliness, greater quality, and cost-effectiveness that are essential to reducing CVD incidence and mortality. [36][37][38][39] Pulse waves are prominent component of human physiological signaling and involve abundant human-health information that can reveal individual conditions, including heart problems (such as arrhythmia), blood pressure, vascular aging, exercise, medication, and sleep status. [40][41][42][43][44][45] Although physical symptoms are often elusively observed in their early stages, they can be diagnosed through subtle pulsewave changes. Preventive action of CVDs can be taken by differentiating the variance of pulse waveforms with consideration of participants' age, gender, weight, and daily diet. [46][47][48][49] Traditional Chinese medicine (TCM) has proposed empirical approaches to analyze human physical state from pulse waves, rendering pulse wave surveillance unavoidable for TCM. [50,51] TCM is unable to continuously monitor pulse waves, limiting the accuracy of the assessment results. As such, empirical diagnostic methods may profoundly depend on the experiences of the practitioner, the emotions of the participant, and the external environment, resulting in the administration of distorted or problematic treatment. [52] Additionally, the diagnostic results among practitioners are Cardiovascular diseases remain the leading cause of death worldwide. The rapid development of flexible sensing technologies and wearable pressure sensors have attracted keen research interest and have been widely used for longterm and real-time cardiovascular status monitoring. Owing to compelling characteristics, including light weight, wearing comfort, and high sensitivity to pulse pressures, physiological pulse ...

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Section: Triboelectric Pressure Sensorsmentioning

confidence: 99%

Section: Triboelectric Pressure Sensorsmentioning

confidence: 99%

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Wearable Pressure Sensors for Pulse Wave Monitoring

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“…Capacitive pressure sensors (CPSs) have gained much attention for their simple device design, ease of integration on flexible substrate for better wearability and ability to provide high-performance pressure measurements. [11][12][13][14][15] Compared to other pressure sensors that used piezoresistance, [16][17][18][19][20] optics, [21][22][23] piezoelectricity, [24][25][26][27][28] triboelectricity, [29][30][31][32] and magnetoelasticity, [33,34] CPSs were known for their good dynamic response. [35] Despite having high sensitivities, recent pressure sensors that used variable conductance hydrogel or transistor configuration required constant supply of power for operation and therefore, not ideal for wearable applications that require sustained operation and are used for long-term vital signal monitoring.…”

Section: Introductionmentioning

confidence: 99%

Soft Iontronic Capacitive Sensor for Beat‐to‐Beat Blood Pressure Measurements

Rwei

Qian

Abiri

et al. 2022

Adv Materials Inter

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Continuous beat‐to‐beat blood pressure (BP) monitoring provides hemodynamic information such as BP changes and waveforms over time, providing abundant information to more accurately diagnose a person's cardiovascular health compared to static cuff‐based measurements. To overcome the shortcomings of current techniques, a highly sensitive (S = 108.52 kPa−1 for 0–5 kPa range) soft capacitive sensor that can be worn like a Band‐Aid is developed such that continuous beat‐to‐beat BP monitoring can be sustainably achieved after an initial calibration. The sensor leverages iontronic material with air gaps for the dielectric combined with highly wrinkled, stretchable electrodes; the resulting average sensitivity of this device is demonstrated to be higher than that of other comparable sensors in literature. For the hemodynamic capture, the operating frequency of 300 kHz is chosen to achieve higher temporal resolution in continuous BP monitoring. Further, the multi‐island design in this work allows for rapid placement of the sensor without needing to accurately align with the underlying artery. Because of the improved sensitivity, the sensors can be adhered to the pulse points without an applanator. Finally, this sensor demonstrates sustained beat‐to‐beat blood pressure recordings that show excellent systolic, diastolic, and mean arterial pressure correlation with an FDA‐cleared device, the Caretaker.

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“…The flexible pressure sensor can be divided into piezoresistive type [ 21 , 22 , 23 ], pressure–capacitive type [ 24 , 25 , 26 ], piezoelectric type [ 27 , 28 , 29 ], and piezomagnetic type [ 30 , 31 ], according to the working principle. It is generally known that high performance is the prerequisite for flexible pressure sensors to be widely used.…”

Section: Introductionmentioning

confidence: 99%

Force-Sensitive Interface Engineering in Flexible Pressure Sensors: A Review

Tai

Wei

et al. 2022

Sensors

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Flexible pressure sensors have received extensive attention in recent years due to their great importance in intelligent electronic devices. In order to improve the sensing performance of flexible pressure sensors, researchers are committed to making improvements in device materials, force-sensitive interfaces, and device structures. This paper focuses on the force-sensitive interface engineering of the device, which listing the main preparation methods of various force-sensitive interface microstructures and describing their respective advantages and disadvantages from the working mechanisms and practical applications of the flexible pressure sensor. What is more, the device structures of the flexible pressure sensor are investigated with the regular and irregular force-sensitive interface and accordingly the influences of different device structures on the performance are discussed. Finally, we not only summarize diverse practical applications of the existing flexible pressure sensors controlled by the force-sensitive interface but also briefly discuss some existing problems and future prospects of how to improve the device performance through the adjustment of the force-sensitive interface.

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Enabling the Unconstrained Epidermal Pulse Wave Monitoring via Finger‐Touching

Cited by 39 publications

References 64 publications

Wearable Pressure Sensors for Pulse Wave Monitoring

Wearable Pressure Sensors for Pulse Wave Monitoring

Soft Iontronic Capacitive Sensor for Beat‐to‐Beat Blood Pressure Measurements

Force-Sensitive Interface Engineering in Flexible Pressure Sensors: A Review

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