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Wearable recording devices

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https://www.readbyqxmd.com/read/28749359/systolic-time-interval-estimation-using-continuous-wave-radar-with-on-body-antennas
#1
Dilpreet Buxi, Evelien Hermeling, Marco Mercuri, Fabian Beutel, Roberto Garcia van der Westen, Tom Torfs, Jean-Michel Redoute, Mehmet Rasit Yuce
The estimation of systolic time interval (STI)s is done using continuous wave (CW) radar at 2.45GHz with an on-body antenna. MOTIVATION: In the state of the art, typically bioimpedance, heart sounds and / or ultrasound is used to measure STIs. All three methods suffer from insufficient accuracy of STI estimation due to various reasons. CW radar is investigated for its ability to overcome the deficiencies in the state of the art. METHODS: Ten healthy male subjects aged 25-45 were asked to lie down at a 30 degree incline...
July 25, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28747154/the-interplay-between-individual-social-behavior-and-clinical-symptoms-in-small-clustered-groups
#2
Piero Poletti, Roberto Visintainer, Bruno Lepri, Stefano Merler
BACKGROUND: Mixing patterns of human populations play a crucial role in shaping the spreading paths of infectious diseases. The diffusion of mobile and wearable devices able to record close proximity interactions represents a great opportunity for gathering detailed data on social interactions and mixing patterns in human populations. The aim of this study is to investigate how social interactions are affected by the onset of symptomatic conditions and to what extent the heterogeneity in human behavior can reflect a different risk of infection...
July 26, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28737748/inflammation-free-gas-permeable-lightweight-stretchable-on-skin-electronics-with-nanomeshes
#3
Akihito Miyamoto, Sungwon Lee, Nawalage Florence Cooray, Sunghoon Lee, Mami Mori, Naoji Matsuhisa, Hanbit Jin, Leona Yoda, Tomoyuki Yokota, Akira Itoh, Masaki Sekino, Hiroshi Kawasaki, Tamotsu Ebihara, Masayuki Amagai, Takao Someya
Thin-film electronic devices can be integrated with skin for health monitoring and/or for interfacing with machines. Minimal invasiveness is highly desirable when applying wearable electronics directly onto human skin. However, manufacturing such on-skin electronics on planar substrates results in limited gas permeability. Therefore, it is necessary to systematically investigate their long-term physiological and psychological effects. As a demonstration of substrate-free electronics, here we show the successful fabrication of inflammation-free, highly gas-permeable, ultrathin, lightweight and stretchable sensors that can be directly laminated onto human skin for long periods of time, realized with a conductive nanomesh structure...
July 17, 2017: Nature Nanotechnology
https://www.readbyqxmd.com/read/28727414/graphene-based-three-dimensional-capacitive-touch-sensor-for-wearable-electronics
#4
Minpyo Kang, Jejung Kim, Bongkyun Jang, Youngcheol Chae, Jae-Hyun Kim, Jong-Hyun Ahn
The development of input device technology in a conformal and stretchable format is important for the advancement of various wearable electronics. Herein, we report a capacitive touch sensor with good sensing capabilities in both contact and noncontact modes, enabled by the use of graphene and a thin device geometry. This device can be integrated with highly deformable areas of the human body, such as the forearms and palms. This touch sensor detects multiple touch signals in acute recordings and recognizes the distance and shape of the approaching objects before direct contact is made...
July 24, 2017: ACS Nano
https://www.readbyqxmd.com/read/28723207/wearable-flexible-and-multifunctional-healthcare-device-with-an-isfet-chemical-sensor-for-simultaneous-sweat-ph-and-skin-temperature-monitoring
#5
Shogo Nakata, Takayuki Arie, Seiji Akita, Kuniharu Takei
Real-time daily healthcare monitoring may increase the chances of predicting and diagnosing diseases in their early stages which, currently, occurs most frequently during medical check-ups. Next-generation noninvasive healthcare devices, such as flexible multifunctional sensor sheets designed to be worn on skin, are considered to be highly suitable candidates for continuous real-time health monitoring. For healthcare applications, acquiring data on the chemical state of the body, alongside physical characteristics such as body temperature and activity, are extremely important for predicting and identifying potential health conditions...
March 24, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28714112/wearables-in-epilepsy-and-parkinson-s-disease-a-focus-group-study
#6
A Ozanne, D Johansson, U Hällgren Graneheim, K Malmgren, F Bergquist, M Alt Murphy
OBJECTIVES: Wearable sensors that measure movement and physiological variables are attractive for clinical evaluation of neurological diseases such as epilepsy and Parkinson's disease (PD). The aim of this study was to explore perceptions regarding the use of wearable technology in disease monitoring and management as reported by individuals with epilepsy and Parkinson's disease as well as health professionals working with these patient groups. MATERIALS AND METHODS: Six patient groups (n=25) and two groups with health professionals (n=15) participated in this qualitative, descriptive study with focus group interviews...
July 16, 2017: Acta Neurologica Scandinavica
https://www.readbyqxmd.com/read/28709155/variable-accuracy-of-wearable-heart-rate-monitors-during-aerobic-exercise
#7
Stephen Gillinov, Muhammad Etiwy, Robert Wang, Gordon Blackburn, Dermot Phelan, A Marc Gillinov, Penny Houghtaling, Hoda Javadikasgari, Milind Y Desai
PURPOSE: Athletes and members of the public increasingly rely on wearable HR monitors to guide physical activity and training. The accuracy of newer, optically based monitors is unconfirmed. We sought to assess the accuracy of five optically based HR monitors during various types of aerobic exercise. METHODS: Fifty healthy adult volunteers (mean ± SD age = 38 ± 12 yr, 54% female) completed exercise protocols on a treadmill, a stationary bicycle, and an elliptical trainer (±arm movement)...
August 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28705994/wearable-brain-imaging-with-multi-modal-physiological-recording
#8
Gary E Strangman, Vladimir Ivkovic, Quan Zhang
The brain is a central component of cognitive and physical human performance. Measures including functional brain activation, cerebral perfusion, cerebral oxygenation, evoked electrical responses, and resting hemodynamic and electrical activity are all related to, or can predict health status or performance decrements. However, measuring brain physiology typically requires large, stationary machines that are not suitable for mobile or self-monitoring. Moreover, when individuals are ambulatory, systemic physiological fluctuations-e...
July 13, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28678697/in-ear-audio-wearable-measurement-of-heart-and-breathing-rates-for-health-and-safety-monitoring
#9
Alexis Martin, Jeremie Voix
OBJECTIVE: This paper examines the integration of a non-invasive vital sign monitoring feature into the workers' hearing protection devices (HPDs) by using a microphone positioned within the earcanal under the HPD. METHODS: 25 test-subjects were asked to breathe at various rhythms and intensities and these realistic sound events were recorded in the earcanal. Digital signal processing algorithms were then developed to assess heart and breathing rates. Finally, to test the robustness of theses algorithms in noisy work environments, industrial noise was added to the in-ear recorded signals and an adaptive denoising filter was used...
June 27, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28674650/an-adaptive-singular-spectrum-analysis-method-for-extracting-brain-rhythms-of-electroencephalography
#10
Hai Hu, Shengxin Guo, Ran Liu, Peng Wang
Artifacts removal and rhythms extraction from electroencephalography (EEG) signals are important for portable and wearable EEG recording devices. Incorporating a novel grouping rule, we proposed an adaptive singular spectrum analysis (SSA) method for artifacts removal and rhythms extraction. Based on the EEG signal amplitude, the grouping rule determines adaptively the first one or two SSA reconstructed components as artifacts and removes them. The remaining reconstructed components are then grouped based on their peak frequencies in the Fourier transform to extract the desired rhythms...
2017: PeerJ
https://www.readbyqxmd.com/read/28666061/conditional-neuromodulation-of-neurogenic-detrusor-overactivity-using-transrectal-stimulation-in-patients-with-spinal-cord-injury-a-proof-of-principle-study
#11
Sarah Louise Knight, Nuwani Edirisinghe, Brian Leaker, Judith Susser, Michael Duncan Craggs
AIMS: A proof of principle study of a novel wearable device to control neurogenic detrusor over-activity in eight male spinal cord injured subjects using conditional neuromodulation. METHODS: Transrectal stimulation was delivered through the device in response to simultaneously recorded external anal sphincter (EAS) contraction as a marker for neurogenic detrusor overactivity (NDO). The effect of conditional neuromodulation on bladder capacity and maximum detrusor pressure was investigated in addition to reliability of dyssynergic sphincter contraction as a marker for NDO...
June 30, 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/28661047/efficient-skin-temperature-sensor-and-stable-gel-less-sticky-ecg-sensor-for-a-wearable-flexible-healthcare-patch
#12
Yuki Yamamoto, Daisuke Yamamoto, Makoto Takada, Hiroyoshi Naito, Takayuki Arie, Seiji Akita, Kuniharu Takei
Wearable, flexible healthcare devices, which can monitor health data to predict and diagnose disease in advance, benefit society. Toward this future, various flexible and stretchable sensors as well as other components are demonstrated by arranging materials, structures, and processes. Although there are many sensor demonstrations, the fundamental characteristics such as the dependence of a temperature sensor on film thickness and the impact of adhesive for an electrocardiogram (ECG) sensor are yet to be explored in detail...
June 29, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28659780/estimation-of-human-workload-from-the-auditory-steady-state-response-recorded-via-a-wearable-electroencephalography-system-during-walking
#13
Yusuke Yokota, Shingo Tanaka, Akihiro Miyamoto, Yasushi Naruse
Workload in the human brain can be a useful marker of internal brain state. However, due to technical limitations, previous workload studies have been unable to record brain activity via conventional electroencephalography (EEG) and magnetoencephalography (MEG) devices in mobile participants. In this study, we used a wearable EEG system to estimate workload while participants walked in a naturalistic environment. Specifically, we used the auditory steady-state response (ASSR) which is an oscillatory brain activity evoked by repetitive auditory stimuli, as an estimation index of workload...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28659255/mobile-device-accuracy-for-step-counting-across-age-groups
#14
François Modave, Yi Guo, Jiang Bian, Matthew J Gurka, Alice Parish, Megan D Smith, Alexandra M Lee, Thomas W Buford
BACKGROUND: Only one in five American meets the physical activity recommendations of the Department of Health and Human Services. The proliferation of wearable devices and smartphones for physical activity tracking has led to an increasing number of interventions designed to facilitate regular physical activity, in particular to address the obesity epidemic, but also for cardiovascular disease patients, cancer survivors, and older adults. However, the inconsistent findings pertaining to the accuracy of wearable devices for step counting needs to be addressed, as well as factors known to affect gait (and thus potentially impact accuracy) such as age, body mass index (BMI), or leading arm...
June 28, 2017: JMIR MHealth and UHealth
https://www.readbyqxmd.com/read/28650141/flexible-and-foldable-fully-printed-carbon-black-conductive-nanostructures-on-paper-for-high-performance-electronic-electrochemical-and-wearable-devices
#15
Murilo Santhiago, Cátia C Corrêa, Juliana S Bernardes, Mariane P Pereira, Letícia J M Oliveira, Mathias Strauss, Carlos C B Bufon
In this work, we demonstrate the first example of fully printed carbon nanomaterials on paper with unique features, aiming the fabrication of functional electronic and electrochemical devices. Bare and modified inks were prepared by combining carbon black and cellulose acetate to achieve high-performance conductive tracks with low sheet resistance. The carbon black tracks withstand extremely high folding cycles (>20 000 cycles), a new record-high with a response loss of less than 10%. The conductive tracks can also be used as 3D paper-based electrochemical cells with high heterogeneous rate constants, a feature that opens a myriad of electrochemical applications...
July 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28638834/personalized-consent-flow-in-contemporary-data-sharing-for-medical-research-a-viewpoint
#16
Ester A Rake, Marleen M H J van Gelder, David C Grim, Barend Heeren, Lucien J L P G Engelen, Tom H van de Belt
BACKGROUND: Health data personally collected by individuals with wearable devices and smartphones is becoming an important data source for healthcare, but also for medical research. OBJECTIVE: To describe a new consent model that allows people to control their personally collected health data and determine to what extent they want to share these for research purposes. METHODS: We developed, in close collaboration with patients, researchers, healthcare professionals, privacy experts, and an accredited Medical Ethical Review Committee, an innovative concept called "personalized consent flow" within a research platform connected to a personal health record...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28597911/digitizing-medicines-for-remote-capture-of-oral-medication-adherence-using-co-encapsulation
#17
Sara H Browne, Charles Peloquin, Frank Santillo, Richard Haubrich, Leticia Muttera, Kathleen Moser, George Savage, Constance Benson, Terrence Blaschke
High-resolution measurement of medication adherence is essential to personalized drug therapy . An FDA-cleared device, using an edible ingestion sensor (IS), external wearable patch and paired mobile device, can detect and record ingestion events. Oral medications must be combined with an IS to generate precise 'digitized-medication' ingestion records. We developed a GMP-protocol to repackage oral medications with the IS within certified Capsugel® capsules, termed co-encapsulation (CoE). A randomized bioequivalence study of CoE-IS-Rifamate (Isoniazid/Rifampin 150/300mg) versus native-Rifamate was conducted in 12 patients with active Mycobacterium Tuberculosis (MTB) and demonstrated bioequivalence using the population method ratio test (95% CI)...
June 9, 2017: Clinical Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28566138/a-newly-developed-ultraminiature-wearable-electromyogram-system-useful-for-analyses-of-masseteric-activity-during-the-whole-day
#18
Taihiko Yamaguchi, Saki Mikami, Miku Saito, Kazuki Okada, Akihito Gotouda
PURPOSE: We describe the characteristics of a new data-logger-type ultraminiature electromyogram (EMG) system (FLA-500-SD) and methods used for recording and we show its potential in clinical applications by presenting an example of a clinical case. METHOD: FLA contains electrodes, an amplifier, 12-bit analog-to-digital (A/D) converter at a sampling frequency of 1kHz, 16-bit CPU, a 3.7-V coin-shaped lithium battery, and a micro SD card. The size of FLA is 37.0×23...
May 26, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28555016/evaluation-of-feature-extraction-and-recognition-for-activity-monitoring-and-fall-detection-based-on-wearable-semg-sensors
#19
Xugang Xi, Minyan Tang, Seyed M Miran, Zhizeng Luo
As an essential subfield of context awareness, activity awareness, especially daily activity monitoring and fall detection, plays a significant role for elderly or frail people who need assistance in their daily activities. This study investigates the feature extraction and pattern recognition of surface electromyography (sEMG), with the purpose of determining the best features and classifiers of sEMG for daily living activities monitoring and fall detection. This is done by a serial of experiments. In the experiments, four channels of sEMG signal from wireless, wearable sensors located on lower limbs are recorded from three subjects while they perform seven activities of daily living (ADL)...
May 27, 2017: Sensors
https://www.readbyqxmd.com/read/28545575/impaired-chronotropic-response-to-physical-activities-in-heart-failure-patients
#20
Hong Shen, Jianrong Zhao, Xiaohong Zhou, Jingbo Li, Qing Wan, Jing Huang, Hui Li, Liqun Wu, Shungang Yang, Ping Wang
BACKGROUND: While exercise-based cardiac rehabilitation has a beneficial effect on heart failure hospitalization and mortality, it is limited by the presence of chronotropic incompetence (CI) in some patients. This study explored the feasibility of using wearable devices to assess impaired chronotropic response in heart failure patients. METHODS: Forty patients with heart failure (left ventricular ejection fraction, LVEF: 44.6 ± 5.8; age: 54.4 ± 11.7) received ECG Holter and accelerometer to monitor heart rate (HR) and physical activities during symptom-limited treadmill exercise testing, 6-min hall walk (6MHW), and 24-h daily living...
May 25, 2017: BMC Cardiovascular Disorders
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