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https://www.readbyqxmd.com/read/28913978/a-temperature-sensor-implant-for-active-implantable-medical-devices-for-in-vivo-subacute-heating-tests-under-mri
#1
Berk Silemek, Volkan Acikel, Cagdas Oto, Akbar Alipour, Zaliha Gamze Aykut, Oktay Algin, Ergin Atalar
PURPOSE: To introduce a temperature sensor implant (TSI) that mimics an active implantable medical device (AIMD) for animal testing of MRI heating. Computer simulations and phantom experiments poorly represent potential temperature increases. Animal experiments could be a better model, but heating experiments conducted immediately after the surgery suffer from alterations of the thermoregulatory and tissue properties during acute testing conditions. Therefore, the aim of this study was to introduce a temperature sensor implant that mimics an AIMD and capable of measuring the electrode temperature after implantation of the device without any further intervention at any time after the surgery in an animal model...
September 14, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28895879/wireless-technology-recognition-based-on-rssi-distribution-at-sub-nyquist-sampling-rate-for-constrained-devices
#2
Wei Liu, Merima Kulin, Tarik Kazaz, Adnan Shahid, Ingrid Moerman, Eli De Poorter
Driven by the fast growth of wireless communication, the trend of sharing spectrum among heterogeneous technologies becomes increasingly dominant. Identifying concurrent technologies is an important step towards efficient spectrum sharing. However, due to the complexity of recognition algorithms and the strict condition of sampling speed, communication systems capable of recognizing signals other than their own type are extremely rare. This work proves that multi-model distribution of the received signal strength indicator (RSSI) is related to the signals' modulation schemes and medium access mechanisms, and RSSI from different technologies may exhibit highly distinctive features...
September 12, 2017: Sensors
https://www.readbyqxmd.com/read/28869845/a-microdevice-for-rapid-monoplex-and-colorimetric-detection-of-foodborne-pathogens-using-a-centrifugal-microfluidic-platform
#3
Abkar Sayad, Fatimah Ibrahim, Shah Mukim Uddin, Jongman Cho, Marc Madou, Kwai Lin Thong
Outbreaks of foodborne diseases have become a global health concern; hence, many improvements and developments have been made to reduce the risk of food contamination. We developed a centrifugal microfluidic automatic wireless endpoint detection system integrated with loop mediated isothermal amplification (LAMP) for monoplex pathogen detection. Six identical sets were designed on the microfluidic compact disc (CD) to perform 30 genetic analyses of three different species of foodborne pathogens. The consecutive loading, mixing, and aliquoting of the LAMP primers/reagents and DNA sample solutions were accomplished using an optimized square-wave microchannel, metering chambers and revulsion per minute (RPM) control...
August 31, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28867786/proposal-and-evaluation-of-ble-discovery-process-based-on-new-features-of-bluetooth-5-0
#4
Ángela Hernández-Solana, David Perez-Diaz-de-Cerio, Antonio Valdovinos, Jose Luis Valenzuela
The device discovery process is one of the most crucial aspects in real deployments of sensor networks. Recently, several works have analyzed the topic of Bluetooth Low Energy (BLE) device discovery through analytical or simulation models limited to version 4.x. Non-connectable and non-scannable undirected advertising has been shown to be a reliable alternative for discovering a high number of devices in a relatively short time period. However, new features of Bluetooth 5.0 allow us to define a variant on the device discovery process, based on BLE scannable undirected advertising events, which results in higher discovering capacities and also lower power consumption...
August 30, 2017: Sensors
https://www.readbyqxmd.com/read/28863247/self-powered-pulse-sensor-for-antidiastole-of-cardiovascular-disease
#5
Han Ouyang, Jingjing Tian, Guanglong Sun, Yang Zou, Zhuo Liu, Hu Li, Luming Zhao, Bojing Shi, Yubo Fan, Yifan Fan, Zhong Lin Wang, Zhou Li
Cardiovascular diseases are the leading cause of death globally; fortunately, 90% of cardiovascular diseases are preventable by long-term monitoring of physiological signals. Stable, ultralow power consumption, and high-sensitivity sensors are significant for miniaturized wearable physiological signal monitoring systems. Here, this study proposes a flexible self-powered ultrasensitive pulse sensor (SUPS) based on triboelectric active sensor with excellent output performance (1.52 V), high peak signal-noise ratio (45 dB), long-term performance (10(7) cycles), and low cost price...
September 1, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28806507/triboelectric-nanogenerator-enabled-body-sensor-network-for-self-powered-human-heart-rate-monitoring
#6
Zhiming Lin, Jun Chen, Xiaoshi Li, Zhihao Zhou, Keyu Meng, Wei Wei, Jin Yang, Zhong Lin Wang
Heart rate monitoring plays a critical role in personal healthcare management. A low-cost, non-invasive and user-friendly heart rate monitoring system is highly desirable. Here, a self-powered wireless Body Sensor Network (BSN) system is developed for heart rate monitoring via integration of a downy-structure based triboelectric nanogenerator (D-TENG), a power management circuit, a heart rate sensor, a signal processing unit and Bluetooth module for wireless data transmission. By converting the inertia energy of human walking into electric power, a maximum power of 2...
August 14, 2017: ACS Nano
https://www.readbyqxmd.com/read/28798359/portable-wireless-electrocorticography-system-with-a-flexible-microelectrodes-array-for-epilepsy-treatment
#7
Kejun Xie, Shaomin Zhang, Shurong Dong, Shijian Li, Chaonan Yu, Kedi Xu, Wanke Chen, Wei Guo, Jikui Luo, Zhaohui Wu
In this paper, we present a portable wireless electrocorticography (ECoG) system. It uses a high resolution 32-channel flexible ECoG electrodes array to collect electrical signals of brain activities and to stimulate the lesions. Electronic circuits are designed for signal acquisition, processing and transmission using Bluetooth Low Energy 4 (LTE4) for wireless communication with cell phone. In-vivo experiments on a rat show that the flexible ECoG system can accurately record electrical signals of brain activities and transmit them to cell phone with a maximal sampling rate of 30 ksampling/s per channel...
August 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28796600/interoperable-end-to-end-remote-patient-monitoring-platform-based-on-ieee-11073-phd-and-zigbee-health-care-profile
#8
Malcolm Clarke, Joost de Folter, Vivek Verma, Hulya Gokalp
This paper describes the implementation of an end-to-end remote monitoring platform based on the IEEE 11073 standards for Personal Health Devices (PHD). It provides an overview of the concepts and approaches and describes how the standard has been optimized for small devices with limited resources of processor, memory and power and that use short range wireless technology. It explains aspects of IEEE 11073, including the Domain Information Model, state model and nomenclature, and how these support its plug-and-play architecture...
August 7, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28783073/an-rfid-indoor-positioning-algorithm-based-on-bayesian-probability-and-k-nearest-neighbor
#9
He Xu, Ye Ding, Peng Li, Ruchuan Wang, Yizhu Li
The Global Positioning System (GPS) is widely used in outdoor environmental positioning. However, GPS cannot support indoor positioning because there is no signal for positioning in an indoor environment. Nowadays, there are many situations which require indoor positioning, such as searching for a book in a library, looking for luggage in an airport, emergence navigation for fire alarms, robot location, etc. Many technologies, such as ultrasonic, sensors, Bluetooth, WiFi, magnetic field, Radio Frequency Identification (RFID), etc...
August 5, 2017: Sensors
https://www.readbyqxmd.com/read/28774526/gopro-hero-4-black-recording-of-scleral-buckle-placement-during-retinal-detachment-repair
#10
Vincent Y Ho, Vaishali G Shah, David M Yates, Gaurav K Shah
OBJECTIVE: GoPro and Google Glass technology have previously been used to record procedures in ophthalmology and other medical fields. In this manuscript, GoPro's latest HERO 4 Black edition camera (GoPro Inc, San Mateo, Calif.) will be used to record the placement of a scleral buckle during retinal detachment surgery. METHODS: GoPro HERO 4 Black edition camera, which records 4K-quality video with a resolution of 3840 (pixels) x 2160 (lines), was mounted on a head strap to record placement of a scleral buckle for a retinal detachment...
August 2017: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
https://www.readbyqxmd.com/read/28747154/the-interplay-between-individual-social-behavior-and-clinical-symptoms-in-small-clustered-groups
#11
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/28745090/if-smbg-accuracy-is-critical-to-patient-safety-why-are-inaccurate-meters-still-on-the-market
#12
Christopher G Parkin
In this issue of Journal of Diabetes Science and Technology, Christiansen and colleagues report results from two studies, laboratory and clinical, that assessed the accuracy of a new blood glucose monitoring system, the Contour®Next ONE (Ascensia Diabetes Care, Parsippany, NJ, USA). The new system comprises a blood glucose meter that can link (via Bluetooth®) to the Contour™ Diabetes app, which operates on a smartphone or tablet. Results from both studies showed that the system exceeded the accuracy standards defined by the International Organization for Standardization (ISO) 15197:2013...
May 2017: Journal of Diabetes Science and Technology
https://www.readbyqxmd.com/read/28736109/electromyographic-analysis-of-superior-orbicularis-oris-muscle-function-in-children-surgically-treated-for-unilateral-complete-cleft-lip-and-palate
#13
Liliana Szyszka-Sommerfeld, Krzysztof Woźniak, Teresa Matthews-Brzozowska, Beata Kawala, Marcin Mikulewicz
PURPOSE: The aim of this study was to assess the electrical activity of the superior orbicularis oris muscle in children surgically treated for unilateral complete cleft lip and palate (UCCLP). MATERIAL AND METHODS: The sample comprised 45 patients 6.38-12.68 years of age with UCCLP and 40 subjects 6.61-11.71 years of age with no clefts. Electromyographical (EMG) recordings were taken with a DAB-Bluetooth Instrument (Zebris Medical GmbH, Germany) in the rest position and during saliva swallowing, lip protrusion and reciprocal compression of the lips, as well as while producing the phonemes /p/, /b/, and /m/ combined with the vowel /a/...
September 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28725015/all-printed-highly-sensitive-2d-mos2-based-multi-reagent-immunosensor-for-smartphone-based-point-of-care-diagnosis
#14
Memoon Sajid, Ahmed Osman, Ghayas Uddin Siddiqui, Hyun Bum Kim, Soo Wan Kim, Jeong Bum Ko, Yoon Kyu Lim, Kyung Hyun Choi
Immunosensors are used to detect the presence of certain bio-reagents mostly targeted at the diagnosis of a condition or a disease. Here, a general purpose electrical immunosensor has been fabricated for the quantitative detection of multiple bio-reagents through the formation of an antibody-antigen pair. The sensors were fabricated using all printing approaches. 2D transition metal dichalcogenide (TMDC) MoS2 thin film was deposited using Electrohydrodynamic atomization (EHDA) on top of an interdigitated transducer (IDT) electrode fabricated by reverse offset printing...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28715792/smartphone-based-cyclic-voltammetry-system-with-graphene-modified-screen-printed-electrodes-for-glucose-detection
#15
Daizong Ji, Lei Liu, Shuang Li, Chen Chen, Yanli Lu, Jiajia Wu, Qingjun Liu
Smartphone-based electrochemical devices have such advantages as the low price, miniaturization, and obtaining the real-time data. As a popular electrochemical method, cyclic voltammetry (CV) has shown its great practicability for quantitative detection and electrodes modification. In this study, a smartphone-based CV system with a simple method of electrode modification was constructed to perform electrochemical detections. The system was composed of these main portions: modified electrodes, portable electrochemical detector and smartphone...
July 11, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28703868/cardiac-vagal-tone-a-non-invasive-measure-of-parasympathetic-tone-is-a-clinically-relevant-tool-in-type-1-diabetes-mellitus
#16
C Brock, N Jessen, B Brock, P E Jakobsen, T K Hansen, J M Rantanen, S Riahi, Y K Dimitrova, A Dons-Jensen, Q Aziz, A M Drewes, A D Farmer
AIMS: To compare a novel index of parasympathetic tone, cardiac vagal tone, with established autonomic variables and to test the hypotheses that (1) cardiac vagal tone would be associated with established time and frequency domain measures of heart rate and (2) cardiac vagal tone would be lower in people with Type 1 diabetes than in a matched healthy cohort and lower still in people with established neuropathy. METHODS: Cardiac vagal tone is a validated cardiometrically derived index of parasympathetic tone...
July 13, 2017: Diabetic Medicine: a Journal of the British Diabetic Association
https://www.readbyqxmd.com/read/28700603/the-language-of-glove-wireless-gesture-decoder-with-low-power-and-stretchable-hybrid-electronics
#17
Timothy F O'Connor, Matthew E Fach, Rachel Miller, Samuel E Root, Patrick P Mercier, Darren J Lipomi
This communication describes a glove capable of wirelessly translating the American Sign Language (ASL) alphabet into text displayable on a computer or smartphone. The key components of the device are strain sensors comprising a piezoresistive composite of carbon particles embedded in a fluoroelastomer. These sensors are integrated with a wearable electronic module consisting of digitizers, a microcontroller, and a Bluetooth radio. Finite-element analysis predicts a peak strain on the sensors of 5% when the knuckles are fully bent...
2017: PloS One
https://www.readbyqxmd.com/read/28685468/tissue-integrating-oxygen-sensors-continuous-tracking-of-tissue-hypoxia
#18
Natalie A Wisniewski, Scott P Nichols, Soya J Gamsey, Steve Pullins, Kit Y Au-Yeung, Bruce Klitzman, Kristen L Helton
We describe a simple method of tracking oxygen in real-time with injectable, tissue-integrating microsensors. The sensors are small (500 μm × 500 μm × 5 mm), soft, flexible, tissue-like, biocompatible hydrogel s that have been shown to overcome the foreign body response for long-term sensing. The sensors are engineered to change luminescence in the presence of oxygen or other analytes and function for months to years in the body. A single injection followed by non-invasive monitoring with a hand-held or wearable Bluetooth optical reader enables intermittent or continuous measurements...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28674410/mobile-nucleic-acid-amplification-testing-mobinaat-for-chlamydia-trachomatis-screening-in-hospital-emergency-department-settings
#19
D J Shin, P Athamanolap, L Chen, J Hardick, M Lewis, Y H Hsieh, R E Rothman, C A Gaydos, T H Wang
Management of curable sexually-transmitted infections (STI) such as Chlamydia can be revolutionized by highly sensitive nucleic acid testing that is deployable at the point-of-care (POC). Here we report the development of a mobile nucleic acid amplification testing (mobiNAAT) platform utilizing a mobile phone and droplet magnetofluidics to deliver NAAT in a portable and accessible format. By using magnetic particles as a mobile substrate for nucleic acid capture and transport, fluid handling is reduced to particle translocation on a simple magnetofluidic cartridge assembled with reagents for nucleic acid purification and amplification...
July 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28669285/use-of-multimodal-technology-to-identify-digital-correlates-of-violence-among-inpatients-with-serious-mental-illness-a-pilot-study
#20
Dror Ben-Zeev, Emily A Scherer, Rachel M Brian, Lisa A Mistler, Andrew T Campbell, Rui Wang
OBJECTIVE: The study examined multimodal technologies to identify correlates of violence among inpatients with serious mental illness. METHODS: Twenty-eight high-risk inpatients were provided with smartphones adapted for data collection. Participants recorded their thoughts and behaviors by using self-report software. Sensors embedded in each device (microphone and accelerometers) and throughout the inpatient unit (Bluetooth beacons) captured patients' activity and location...
July 3, 2017: Psychiatric Services: a Journal of the American Psychiatric Association
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