Journal ArticleDOI
Multichannel Reflective PPG Earpiece Sensor With Passive Motion Cancellation
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TLDR
The integrity of PPG signal and accuracy of heart rate detection showed that with adequate optical shielding and the proposed passive motion cancellation, the device was able to reliably detect heart rate both during rest and moderate exercise.Abstract:
This paper addresses the design considerations of a novel earpiece photoplethymograph (PPG) sensor and its in-situ evaluation results. The device is encapsulated with multiple LEDs and photodiodes based on a reflective PPG design. A compact and low power circuitry was developed for signal control and conditioning. PPG signals with an averaged ac/dc ratio of 0.001-0.01 and 10% relative strength (compared to finger-based approach) were recorded from the superior and posterior auricular skins. The integrity of PPG signal and accuracy of heart rate detection were evaluated and the results showed that with adequate optical shielding and the proposed passive motion cancellation, the device was able to reliably detect heart rate both during rest and moderate exercise. The proposed sensor design is low power, easy to wear compared to conventional earlobe PPG devices.read more
Citations
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Journal ArticleDOI
Wearable Photoplethysmographic Sensors—Past and Present
TL;DR: A review of wearable pulse rate sensors with green LEDs can be found in this paper. But, the authors do not discuss the application of these sensors in the medical field. But, they briefly present the history of wearable PPG and recent developments in wearable pulse-rate sensors.
Journal ArticleDOI
Unobtrusive Sensing and Wearable Devices for Health Informatics
Yali Zheng,Xiaorong Ding,Carmen C. Y. Poon,Benny Lo,Heye Zhang,Xiao-Lin Zhou,Guang-Zhong Yang,Ni Zhao,Yuan-Ting Zhang +8 more
TL;DR: This paper aims to provide an overview of four emerging unobtrusive and wearable technologies, which are essential to the realization of pervasive health information acquisition, including: 1) unobTrusive sensing methods, 2) smart textile technology, 3) flexible-stretchable-printable electronics, and 4) sensor fusion.
Journal ArticleDOI
Photoplethysmography Revisited: From Contact to Noncontact, From Point to Imaging
Yu Sun,Nitish V. Thakor +1 more
TL;DR: This study presents an overview of the wide range of IPPG systems currently being introduced along with examples of their application in various physiological assessments and believes that the widespread acceptance ofIPPG is happening, and it will dramatically accelerate the promotion of this healthcare model in the near future.
Journal ArticleDOI
Wearable Sensors and Systems
TL;DR: Efforts to merge home robots and wearable technology are expected to enable a new generation of complex systems with the ability to monitor subjects' status, facilitate the administration of interventions, and provide an invaluable tool to respond to emergency situations.
Journal ArticleDOI
Wearable Medical Systems for p-Health
TL;DR: Enabling technologies for continuous and noninvasive measurements of vital signs and biochemical variables, advances in intelligent biomedical clothing and body area networks, approaches for motion artifact reduction, strategies for wearable energy harvesting, and the establishment of standard protocols for the evaluation of wearable medical devices are presented.
References
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Body sensor networks
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TL;DR: Gray's anatomy for students , Gray's physiology for students, and Gray's Anatomy for students.
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TL;DR: In this paper, the authors present a user interface for a pulse oximeter, based on an interface provided by Lozano-Nieto and Schowalter, with a discussion of the application of pulse oximetry.
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The blood supply of various skin areas as estimated by the photoelectric plethysmograph
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Artifact-resistant power-efficient design of finger-ring plethysmographic sensors
TL;DR: benchmarking tests with FDA-approved PPG and electrocardiogram reveal that the ring sensor is comparable to those devices in detecting beat-to-beat pulsation despite disturbances, and designed and built based on the power budget analysis and the artifact-resistive attachment method.