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https://www.readbyqxmd.com/read/28819983/an-evaluation-of-the-effectiveness-of-a-risk-based-monitoring-approach-implemented-with-clinical-trials-involving-implantable-cardiac-medical-devices
#1
Christopher A Diani, Angie Rock, Phil Moll
Background Risk-based monitoring is a concept endorsed by the Food and Drug Administration to improve clinical trial data quality by focusing monitoring efforts on critical data elements and higher risk investigator sites. BIOTRONIK approached this by implementing a comprehensive strategy that assesses risk and data quality through a combination of operational controls and data surveillance. This publication demonstrates the effectiveness of a data-driven risk assessment methodology when used in conjunction with a tailored monitoring plan...
August 1, 2017: Clinical Trials: Journal of the Society for Clinical Trials
https://www.readbyqxmd.com/read/28819006/increased-tissue-oxygenation-explains-the-attenuation-of-hyperaemia-upon-repetitive-pneumatic-compression-of-the-lower-leg
#2
Alessandro Messere, Gianluca Ceravolo, Walter Franco, Daniela Maffiodo, Carlo Ferraresi, Silvestro Roatta
Aim The rapid hyperaemia evoked by muscle compression is short-lived and was recently shown to undergo a rapid decrease even in spite of continuing mechanical stimulation. The present study aims at investigating the mechanisms underlying this attenuation which include local metabolic mechanisms, desensitization of mechano-sensitive pathways, and reduced efficacy of the muscle pump. Methods In 10 healthy subjects short sequences of mechanical compressions (n=3-6; 150 mmHg) of the lower leg were delivered at different inter-stimulus intervals (ranging from 20 to 160 s) through a customized pneumatic device...
August 17, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28810961/resuscitation-of-hypotensive-traumatic-brain-injured-animals-with-spray-dried-plasma-does-not-adversely-alter-physiology-and-improves-blood-brain-barrier-function
#3
Steven McDaniel, Stephanie Golla, Anthony N Moore, Joe DaCorta, Arthur Bode, Shibani Pati, Pramod K Dash, Jing Zhao
INTRODUCTION: According to the Defense and Veterans Brain Injury Center and the Armed Forces Health Surveillance Center, the number of soldiers who have sustained a traumatic brain injury (TBI) has risen dramatically over the past decade. Studies have shown that brain damage can be exacerbated if blood loss occurs (often occurring in polytrauma). As blood supply is critical for brain function and survival, TBI patients must be properly resuscitated to maintain blood volume, blood pressure, and cerebral perfusion...
July 2017: Military Medicine
https://www.readbyqxmd.com/read/28809670/cardio-pulmonary-stethoscope-clinical-validation-with-heart-failure-and-hemodialysis-patients
#4
Magdy F Iskander, Todd B Seto, Ruthsenne Rg Perron, Eunjung Lim, Farhan Qazi
OBJECTIVE: The purpose of this study is to evaluate the accuracy of a noninvasive radiofrequency-based device, the Cardio-Pulmonary Stethoscope (CPS), to monitor heart and respiration rates and detect changes in lung water content in human experiments and clinical trials. METHODS: Three human populations (healthy subjects (n=4), heart failure (n=12) and hemodialysis (n=13) patients) were enrolled in this study. The study was conducted at the University of Hawaii and The Queen's Medical Center in Honolulu, HI...
August 14, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28806507/triboelectric-nanogenerator-enabled-body-sensor-network-for-self-powered-human-heart-rate-monitoring
#5
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/28805693/glucose-sensing-for-diabetes-monitoring-recent-developments
#6
REVIEW
Danielle Bruen, Colm Delaney, Larisa Florea, Dermot Diamond
This review highlights recent advances towards non-invasive and continuous glucose monitoring devices, with a particular focus placed on monitoring glucose concentrations in alternative physiological fluids to blood.
August 12, 2017: Sensors
https://www.readbyqxmd.com/read/28804907/allergic-contact-dermatitis-caused-by-isobornyl-acrylate-in-freestyle%C3%A2-libre-a-newly-introduced-glucose-sensor
#7
Anne Herman, Olivier Aerts, Marie Baeck, Magnus Bruze, Christophe De Block, An Goossens, Nils Hamnerius, Sara Huygens, Dominique Maiter, Dominique Tennstedt, Bernard Vandeleene, Martin Mowitz
BACKGROUND: Glucose sensors, such as FreeStyle® Libre, are innovative medical devices developed for diabetes patients as a replacement for classic glucose meters, ensuring continuous glucose monitoring without the disadvantage of regular skin finger pricks. OBJECTIVES: To report several cases of allergic contact dermatitis caused by FreeStyle® Libre, and to report on isobornyl acrylate as a culprit allergen. PATIENTS AND METHODS: Fifteen patients presented with allergic contact dermatitis caused by FreeStyle® Libre...
August 14, 2017: Contact Dermatitis
https://www.readbyqxmd.com/read/28803947/monitoring-stress-with-a-wrist-device-using-context
#8
Martin Gjoreski, Mitja Luštrek, Matjaž Gams, Hristijan Gjoreski
Being able to detect stress as it occurs can greatly contribute to dealing with its negative health and economic consequences. However, detecting stress in real life with an unobtrusive wrist device is a challenging task. The objective of this study is to develop a method for stress detection that can accurately, continuously and unobtrusively monitor psychological stress in real life. First, we explore the problem of stress detection using machine learning and signal processing techniques in laboratory conditions, and then we apply the extracted laboratory knowledge to real-life data...
August 10, 2017: Journal of Biomedical Informatics
https://www.readbyqxmd.com/read/28802332/new-algorithms-for-processing-time-series-big-eeg-data-within-mobile-health-monitoring-systems
#9
Mohamed Adel Serhani, Mohamed El Menshawy, Abdelghani Benharref, Saad Harous, Alramzana Nujum Navaz
BACKGROUND AND OBJECTIVES: Recent advances in miniature biomedical sensors, mobile smartphones, wireless communications, and distributed computing technologies provide promising techniques for developing mobile health systems. Such systems are capable of monitoring epileptic seizures reliably, which are classified as chronic diseases. Three challenging issues raised in this context with regard to the transformation, compression, storage, and visualization of big data, which results from a continuous recording of epileptic seizures using mobile devices...
October 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28800887/evaluation-of-the-boussignac-cardiac-arrest-device-b-card-during-cardiopulmonary-resuscitation-in-an-animal-model
#10
Johanna C Moore, Lionel Lamhaut, Alice Hutin, Kenneth W Dodd, Aaron E Robinson, Michael C Lick, Bayert J Salverda, Mason B Hinke, Jose Larabere, Guillaume Debaty, Nicolas Segal
AIM OF THE STUDY: The purpose of this study was to examine continuous oxygen insufflation (COI) in a swine model of cardiac arrest. The primary hypothesis was COI during standard CPR (S-CPR) should result in higher intrathoracic pressure (ITP) during chest compression and lower ITP during decompression versus S-CPR alone. These changes with COI were hypothesized to improve hemodynamics. The second hypothesis was that changes in ITP with S-CPR+COI would result in superior hemodynamics compared with active compression decompression (ACD) + impedance threshold device (ITD) CPR, as this method primarily lowers ITP during chest decompression...
August 8, 2017: Resuscitation
https://www.readbyqxmd.com/read/28800149/atrial-fibrillation-variability-on-long-term-monitoring-of-implantable-cardiac-rhythm-management-devices
#11
Rachel M Kaplan, Paul D Ziegler, Jodi Koehler, Taya V Glotzer, Rod S Passman
BACKGROUND: Atrial fibrillation (AF) burden and duration are predictors of thromboembolic events. The random nature of these measures may affect clinical decision making. The objective of this study was to determine temporal changes in AF burden as detected by continuous monitoring. HYPOTHESIS: AF burden changes over time when detected by continuous monitoring. METHODS: A post hoc analysis of patients enrolled in the TRENDS (A Prospective Study of the Clinical Significance of Atrial Arrhythmias Detected by Implanted Device Diagnostics) study with ≥1 stroke risk factor(s) who were implanted with a dual-chamber cardiac rhythm management device (CRMD) and had AF burden data available for ≥2 years was performed...
August 11, 2017: Clinical Cardiology
https://www.readbyqxmd.com/read/28796206/exceptional-points-enhance-sensing-in-an-optical-microcavity
#12
Weijian Chen, Şahin Kaya Özdemir, Guangming Zhao, Jan Wiersig, Lan Yang
Sensors play an important part in many aspects of daily life such as infrared sensors in home security systems, particle sensors for environmental monitoring and motion sensors in mobile phones. High-quality optical microcavities are prime candidates for sensing applications because of their ability to enhance light-matter interactions in a very confined volume. Examples of such devices include mechanical transducers, magnetometers, single-particle absorption spectrometers, and microcavity sensors for sizing single particles and detecting nanometre-scale objects such as single nanoparticles and atomic ions...
August 9, 2017: Nature
https://www.readbyqxmd.com/read/28792054/droplet-trapping-and-fast-acoustic-release-in-a-multi-height-device-with-steady-state-flow
#13
Richard W Rambach, Kevin Linder, Michael Heymann, Thomas Franke
We demonstrate a novel multilayer polydimethylsiloxane (PDMS) device for selective storage and release of single emulsion droplets. Drops are captured in a microchannel cavity and can be released on-demand through a triggered surface acoustic wave pulse. The surface acoustic wave (SAW) is excited by a tapered interdigital transducer (TIDT) deposited on a piezoelectric lithium niobate (LiNbO3) substrate and inverts the pressure difference across the cavity trap to push a drop out of the trap and back into the main flow channel...
August 9, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28790042/multicentre-randomised-controlled-trial-to-investigate-the-usefulness-of-continuous-pneumatic-regulation-of-tracheal-cuff-pressure-for-reducing-ventilator-associated-pneumonia-in-mechanically-ventilated-severe-trauma-patients-the-agate-study-protocol
#14
Nicolas Marjanovic, Denis Frasca, Karim Asehnoune, Catherine Paugam, Sigismond Lasocki, Carole Ichai, Jean-Yves Lefrant, Marc Leone, Claire Dahyot-Fizelier, Julien Pottecher, Dominique Falcon, Benoit Veber, Jean-Michel Constantin, Sabrina Seguin, Jérémy Guénézan, Olivier Mimoz
INTRODUCTION: Severe trauma represents the leading cause of mortality worldwide. While 80% of deaths occur within the first 24 hours after trauma, 20% occur later and are mainly due to healthcare-associated infections, including ventilator-associated pneumonia (VAP). Preventing underinflation of the tracheal cuff is recommended to reduce microaspiration, which plays a major role in the pathogenesis of VAP. Automatic devices facilitate the regulation of tracheal cuff pressure, and their implementation has the potential to reduce VAP...
August 7, 2017: BMJ Open
https://www.readbyqxmd.com/read/28782353/a-self-powered-wearable-non-invasive-electronic-skin-for-perspiration-analysis-basing-on-piezo-biosensing-unit-matrix-of-enzyme-zno-nanoarrays
#15
Wuxiao Han, Haoxuan He, Linlin Zhang, Chuanyi Dong, Hui Zeng, Yitong Dai, Li-Li Xing, Yan Zhang, Xinyu Xue
The emerging multifunctional flexible electronic-skin for establishing body-electric interaction can enable real-time monitoring of personal health status as a new personalized medicine technique. A key difficulty in the device design is the flexible power supply. Here, a self-powered wearable non-invasive electronic-skin for perspiration analysis has been realized basing on piezo-biosensing unit matrix of enzyme/ZnO nanoarrays. The electronic-skin can detect lactate, glucose, uric acid and urea in the perspiration, and no outside electricity power supply or battery is used in the biosensing process...
August 7, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28777334/a-reliable-handoff-mechanism-for-mobile-industrial-wireless-sensor-networks
#16
Jian Ma, Dong Yang, Hongke Zhang, Mikael Gidlund
With the prevalence of low-power wireless devices in industrial applications, concerns about timeliness and reliability are bound to continue despite the best efforts of researchers to design Industrial Wireless Sensor Networks (IWSNs) to improve the performance of monitoring and control systems. As mobile devices have a major role to play in industrial production, IWSNs should support mobility. However, research on mobile IWSNs and practical tests have been limited due to the complicated resource scheduling and rescheduling compared with traditional wireless sensor networks...
August 4, 2017: Sensors
https://www.readbyqxmd.com/read/28767197/the-effect-of-additives-on-the-early-stages-of-growth-of-calcite-single-crystals
#17
Yi-Yeoun Kim, Colin Freeman, Xiuquing Gong, Mark A Levenstein, Yunwei Wang, Alexander Kulak, Clara Anduix Canto, Shunbo Li, Li Chen, Phillip Lee, Hugo K Christenson, Fiona Meldrum
As crystallization processes are often occur rapid, it can be difficult to monitor the growth mechanisms. Here, we use the fact that crystallization proceeds more slowly in small volumes than in bulk solution, to investigate the effects of the soluble additives Mg2+ and poly(styrene sulfonate) on the early stages of growth of calcite crystals. Using a "Crystal Hotel" microfluidic device to provide well-defined, nanoliter volumes, we observe that calcite crystals form via an amorphous precursor phase. Surprisingly, the first calcite crystals formed are perfect rhombohedra, and no morphological influence of the soluble additives is observed until the crystals reach sizes of 0...
August 2, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28767091/heart-rate-detection-using-microsoft-kinect-validation-and-comparison-to-wearable-devices
#18
Ennio Gambi, Angela Agostinelli, Alberto Belli, Laura Burattini, Enea Cippitelli, Sandro Fioretti, Paola Pierleoni, Manola Ricciuti, Agnese Sbrollini, Susanna Spinsante
Contactless detection is one of the new frontiers of technological innovation in the field of healthcare, enabling unobtrusive measurements of biomedical parameters. Compared to conventional methods for Heart Rate (HR) detection that employ expensive and/or uncomfortable devices, such as the Electrocardiograph (ECG) or pulse oximeter, contactless HR detection offers fast and continuous monitoring of heart activities and provides support for clinical analysis without the need for the user to wear a device. This paper presents a validation study for a contactless HR estimation method exploiting RGB (Red, Green, Blue) data from a Microsoft Kinect v2 device...
August 2, 2017: Sensors
https://www.readbyqxmd.com/read/28756769/continuous-glucose-monitoring-in-the-icu-clinical-considerations-and-consensus
#19
REVIEW
James S Krinsley, J Geoffrey Chase, Jan Gunst, Johan Martensson, Marcus J Schultz, Fabio S Taccone, Jan Wernerman, Julien Bohe, Christophe De Block, Thomas Desaive, Pierre Kalfon, Jean-Charles Preiser
Glucose management in intensive care unit (ICU) patients has been a matter of debate for almost two decades. Compared to intermittent monitoring systems, continuous glucose monitoring (CGM) can offer benefit in the prevention of severe hyperglycemia and hypoglycemia by enabling insulin infusions to be adjusted more rapidly and potentially more accurately because trends in glucose concentrations can be more readily identified. Increasingly, it is apparent that a single glucose target/range may not be optimal for all patients at all times and, as with many other aspects of critical care patient management, a personalized approach to glucose control may be more appropriate...
July 31, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28754002/pediatric-respiratory-support-technology-and-practices-a-global-survey
#20
Amélie O von Saint André-von Arnim, Shelina M Jamal, Grace C John-Stewart, Ndidiamaka L Musa, Joan Roberts, Larissa I Stanberry, Christopher R A Howard
OBJECTIVE: This global survey aimed to assess the current respiratory support capabilities for children with hypoxemia and respiratory failure in different economic settings. METHODS: An online, anonymous survey of medical providers with experience in managing pediatric acute respiratory illness was distributed electronically to members of the World Federation of Pediatric Intensive and Critical Care Society, and other critical care websites for 3 months. RESULTS: The survey was completed by 295 participants from 64 countries, including 28 High-Income (HIC) and 36 Low- and Middle-Income Countries (LMIC)...
July 21, 2017: Healthcare (Basel, Switzerland)
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