A 3D Wrist Pulse Signal Acquisition System for Width Information of Pulse Wave

Chen, Chuanglu; Li, Zhiqiang; Zhang, Yitao; Zhang, Shaolong; Hou, J.P.; Zhang, Haiying

doi:10.3390/s20010011

Cited by 41 publications

(36 citation statements)

References 34 publications

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“…The use of characterized FO is of vital importance, since almost all research papers document improved sensitivity, managing to overcome Bland–Altman tests against established devices or gold standards to determine sensitivity and operation during laboratory tests. This not only for vital signs [ 63 , 91 , 105 , 115 ] but also for a wide variety of optical sensors for use in the medical field, such as bacteria sensors [ 122 ], glucose monitors [ 123 ], cardiovascular monitors [ 107 ] (although this research work fails to present conclusive results due to the small number of samples, but they prove to have better sensitivity values), diabetic foot treatment [ 124 ], and also in the field of biochemistry [ 125 ] as diagnostic sensors, environmental monitoring, and organic and chemical compounds.…”

Section: Discussionmentioning

confidence: 99%

“…Figure 18 also shows an example of the work done by Chuanglu, C. [ 107 ], where you can see that through the fitting of a signal obtained by a FBG sensor and smoothing this same signal, you can get the desired results. Here is shown the behavior of the same blood pressure (systole/diastolic) with a device that can also get more data, such as respiration and pulse.…”

Section: Health Field Sensingmentioning

confidence: 99%

“…It shows how the cardiac pulse signal is obtained. At first, background noise is observed in the output signal, as well as thermal and electromagnetic interference, so they proceed to filter the signal and take samples of the pulses to smooth the signal and finally take more samples to process the signal [ 107 ].…”

Section: Figurementioning

confidence: 99%

“…Reproduced from Refs. [ 19 , 25 , 28 , 32 , 39 , 40 , 56 , 85 , 94 , 95 , 96 , 106 , 107 ] Sensors Journal, Materials Journal, Applied Sciences Journal, Fibers Journal and Journal of Functional Biomaterials of the MDPI. Reproduced from Refs.…”

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confidence: 99%

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Fiber Optic Sensors for Vital Signs Monitoring. A Review of Its Practicality in the Health Field

et al. 2021

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Vital signs not only reflect essential functions of the human body but also symptoms of a more serious problem within the anatomy; they are well used for physical monitoring, caloric expenditure, and performance before a possible symptom of a massive failure—a great variety of possibilities that together form a first line of basic diagnosis and follow-up on the health and general condition of a person. This review includes a brief theory about fiber optic sensors’ operation and summarizes many research works carried out with them in which their operation and effectiveness are promoted to register some vital sign(s) as a possibility for their use in the medical, health care, and life support fields. The review presents methods and techniques to improve sensitivity in monitoring vital signs, such as the use of doping agents or coatings for optical fiber (OF) that provide stability and resistance to the external factors from which they must be protected in in vivo situations. It has been observed that most of these sensors work with single-mode optical fibers (SMF) in a spectral range of 1550 nm, while only some work in the visible spectrum (Vis); the vast majority, operate through fiber Bragg gratings (FBG), long-period fiber gratings (LPFG), and interferometers. These sensors have brought great advances to the measurement of vital signs, especially with regard to respiratory rate; however, many express the possibility of monitoring other vital signs through mathematical calculations, algorithms, or auxiliary devices. Their advantages due to miniaturization, immunity to electromagnetic interference, and the absence of a power source makes them truly desirable for everyday use at all times.

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Section: Discussionmentioning

confidence: 99%

Section: Health Field Sensingmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

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confidence: 99%

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Fiber Optic Sensors for Vital Signs Monitoring. A Review of Its Practicality in the Health Field

et al. 2021

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“…Sensor array achieve simultaneous measurement of the width, amplitude and other spatiotemporal information of dynamic pulse wave under different pressures. [21] Compared with single-channel sensor, sensor array may be more comprehensive to response the pulse characteristics. PPS array capacitance pressure sensor can be manually pressurized, and reflect morphological characteristics of 12-channel pulse wave in real-time.…”

Section: Discussionmentioning

confidence: 99%

WITHDRAWN: Assessment Parameters on Array Pulse Wave Analysis and Application in Hypertensive Disorders

Yao

et al. 2020

Preprint

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Background: At present, there is no effective analysis method for array pulse wave. But this is very important for promoting the development of pulse diagnosis. Hypertension is a common and easy-to-diagnosis of cardiovascular disease, which is the development foundation of other cardiovascular diseases. Our goal in the study is to establish analysis method for array pulse wave and preliminary application in hypertensive disorders.Methods: In this study, a sensor array can be used for real-time monitoring of pulse wave twelve channels. We calculated the average pulse wave (APW) of per channel within thirty seconds. The most representative pulse wave (MRPV) and the APW matched by correlation coefficient. Feature points of the MRPV were identified by manually. These feature points corresponding to the array pulse volume (APV) parameters were also identified by manually. Finally, clinical trial was executed to detect these feature performance indicators in hypertensive disorders.Results: The raoAPV h1 , raoAPV h3 , raoAPV h4 , raoAPV h3/h1 and raoAPV h4/h of hypertension group significantly increased compared with that of the healthy group ( P <0.01, P <0.05). The zhongAPV h4 , zhongAPV h3/h1 , zhongAPV h4/h1 and meanAPV h3 , meanAPV h3/h1 , meanAPV h4/h1 were significantly increased in hypertension group compared with healthy group ( P <0.05, P <0.01). The chiAPV h4/h1 of hypertension group was obviously elevated ( P <0.05). The results preliminarily validated novelty of APV on array pulse wave analysis. This indicator was effective in reflecting the hypertensive vascular function.Conclusion: Traditional Chinese Medicine (TCM) pulse is a combination of multi-dimensional information. Array sensor could be better reduction of TCM pulse characteristics. In the study, the analysis of array pulse wave was valid, and the APV was reliable to mirror TCM pulse characteristics. Keywords ： Pulse diagnosis; Traditional Chinese medicine; Sensor array; Array pulse volume; Healthy persons; Hypertension persons.

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3D Printing of a Flexible Inclined‐Tip Cone Array‐Based Pressure Sensor

Pan

Yang

et al. 2021

Adv Materials Technologies

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particularly important for the detection of physiological signals. To improve the high sensitivity performance of pressure sensors, some researchers have designed special microstructure shapes-that is, pyramids, [16][17][18] ciliated microarrays, [19] inclined micropillars, [20] and convex microarrays. [21][22][23][24] Luo et al. designed a tilted micropillar structure to act as the dielectric layer of a pressure sensor using photolithography technology, [20] and improved the sensitivity of the pressure sensor by 0.42 kPa −1 through bending deformation of the tilted micropillar. Xiong et al. sputtered a gold layer microarray on a film to form a polydimethylsiloxane-gold (PDMS-Au) electrode, and placed a polyvinylidene difluoride (PVDF) film in the middle layer of the electrode to form a pressure sensor with a sandwich structure and a sensitivity of 30.2 kPa −1 . [25] Guan et al. converted natural wood into graphene-oxide-modified flexible wood through a sawing process and chemical treatment, obtaining an environmentally friendly wood pressure sensor with a sensitivity of 1.85 kPa −1 . [26] Sun et al. proposed a flexible fish-scale structure based on a PDMS/carbon nanotube (CNT) composite material, [27] the tactile electronic skin sensor developed with a high sensitivity of 12.1 kPa −1 . Although a variety of microstructure designs have improved sensor pressure sensitivity, when dealing with high pressures (>50 kPa), a single microstructure design can cause a pressure sensor to suffer from limited or saturated pressure response. This is because high-pressure sensors are not considered in the design of multi-level structures to increase the pressure test range of a sensor. [28] Moreover, they require expensive equipment and complex manufacturing processes. Consequently, pressure sensors that are designed with high sensitivity and undergo pressure testing over a wide range will become an important research topic for future studies.In this study, we used PDMS as a flexible carrier and added several conductive materials-such as carbon black (CB), CNTs, and nano-copper powder-to prepare conductive inks suitable for 3D printing. [29][30][31] To detect a wide range of pressures, the inclined-tip cone array of a flexible pressure sensor's conductive layer was designed as a three-layered structure with a stepped height. Inclined cone arrays of different heights produced more sensitive bending over a low-pressure detection range. UnderThe high sensitivity and portability of flexible pressure sensors have attracted widespread attention from researchers owing to their potential use in health monitoring and exercise detection applications. However, to improve the performance of pressure sensors, a special microstructure-shaped design is necessary, which usually requires a complicated manufacturing process. In this study, the use of 3D printing technology is proposed to develop a polydimethylsiloxane-based material along with several conductive materials-carbon black, multiwalled carbon nanotubes, and copper mixed conductive in...

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A 3D Wrist Pulse Signal Acquisition System for Width Information of Pulse Wave

Cited by 41 publications

References 34 publications

Fiber Optic Sensors for Vital Signs Monitoring. A Review of Its Practicality in the Health Field

Fiber Optic Sensors for Vital Signs Monitoring. A Review of Its Practicality in the Health Field

WITHDRAWN: Assessment Parameters on Array Pulse Wave Analysis and Application in Hypertensive Disorders

3D Printing of a Flexible Inclined‐Tip Cone Array‐Based Pressure Sensor

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