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https://www.readbyqxmd.com/read/28207240/interfaces-in-heterogeneous-catalysts-advancing-mechanistic-understanding-through-atomic-scale-measurements
#1
Wenpei Gao, Zachary D Hood, Miaofang Chi
Developing novel catalysts with high efficiency and selectivity is critical for enabling future clean energy conversion technologies. Interfaces in catalyst systems have long been considered the most critical factor in controlling catalytic reaction mechanisms. Interfaces include not only the catalyst surface but also interfaces within catalyst particles and those formed by constructing heterogeneous catalysts. The atomic and electronic structures of catalytic surfaces govern the kinetics of binding and release of reactant molecules from surface atoms...
February 16, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28203074/temperature-and-ph-sensitive-wearable-materials-for-monitoring-foot-ulcers
#2
Pietro Salvo, Nicola Calisi, Bernardo Melai, Valentina Dini, Clara Paoletti, Tommaso Lomonaco, Andrea Pucci, Fabio Di Francesco, Alberto Piaggesi, Marco Romanelli
Foot ulcers account for 15% of comorbidities associated with diabetes. Presently, no device allows the status of foot ulcers to be continuously monitored when patients are not hospitalized. In this study, we describe a temperature and a pH sensor capable of monitoring diabetic foot and venous leg ulcers developed in the frame of the seventh framework program European Union project SWAN-iCare (smart wearable and autonomous negative pressure device for wound monitoring and therapy). Temperature is measured by exploiting the variations in the electrical resistance of a nanocomposite consisting of multiwalled carbon nanotubes and poly(styrene-b-(ethylene-co-butylene)-b-styrene)...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28197582/wearable-microfluidics-fabric-based-digital-droplet-flowmetry-for-perspiration-analysis
#3
Yahui Yang, Siyuan Xing, Zecong Fang, Ruya Li, Helen Koo, Tingrui Pan
The latest development in wearable technologies has attracted much attention. In particular, collection and analysis of body fluids has been a focus. In this paper, we have reported a wearable microfluidic platform made using conventional fabric materials and laser micromachining to measure the flow rate on a patterned fabric surface, referred to as digital droplet flowmetry (DDF). The proposed wearable DDF is capable of collecting and measuring continuous perspiration with high precision (96% on average) in a real-time fashion over a defined area of skin...
February 15, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28194254/long-term-continuous-ambulatory-ecg-monitors-and-external-cardiac-loop-recorders-for-cardiac-arrhythmia-a-health-technology-assessment
#4
(no author information available yet)
BACKGROUND: Ambulatory electrocardiography (ECG) monitors are often used to detect cardiac arrhythmia. For patients with symptoms, an external cardiac loop recorder will often be recommended. The improved recording capacity of newer Holter monitors and similar devices, collectively known as longterm continuous ambulatory ECG monitors, suggests that they will perform just as well as, or better than, external loop recorders. This health technology assessment aimed to evaluate the effectiveness, cost-effectiveness, and budget impact of longterm continuous ECG monitors compared with external loop recorders in detecting symptoms of cardiac arrhythmia...
2017: Ontario Health Technology Assessment Series
https://www.readbyqxmd.com/read/28178140/utility-of-duranta-a-wireless-patch-type-electrocardiographic-monitoring-system-developed-in-japan-in-detecting-covert-atrial-fibrillation-in-patients-with-cryptogenic-stroke-a-case-report
#5
Hisanao Akiyama, Saki Nukui, Takashi Araga, Masashi Hoshino, Keita Tanaka, Satoru Kashima, Rie Sasaki, Kenji Uchino, Yasuhiro Hasegawa
RATIONALE: Subcutaneous implantable electrocardiographs are highly effective in detecting covert atrial fibrillation (AF) in cryptogenic stroke. However, these invasive devices are not indicated for all cryptogenic stroke patients, and noninvasive improvements over conventional Holter-type ambulatory electrocardiography are needed. We evaluated the clinical application and effectiveness of Duranta (ImageONE Co., Ltd.), a wireless patch-type electrocardiographic monitoring system developed in Japan for chronically ill patients or home-based patients at the end of life...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28177299/development-of-an-improved-wearable-device-for-core-body-temperature-monitoring-based-on-the-dual-heat-flux-principle
#6
Jingjie Feng, Congcong Zhou, Cheng He, Yuan Li, Xuesong Ye
In this paper, a miniaturized wearable core body temperature (CBT) monitoring system based on the dual heat flux (DHF) principle was developed. By interspersing calcium carbonate powder in PolyDimethylsiloxane (PDMS), a reformative heat transfer medium was produced to reduce the thermal equilibrium time. Besides, a least mean square (LMS) algorithm based active noise cancellation (ANC) method was adopted to diminish the impact of ambient temperature fluctuations. Theoretical analyses, finite element simulation, experiments on a hot plate and human volunteers were performed...
February 8, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28167378/monitoring-sound-and-light-continuously-in-an-intensive-care-unit-patient-room-a-pilot-study
#7
Louis P Voigt, Kelly Reynolds, Maryam Mehryar, Wai Soon Chan, Natalie Kostelecky, Stephen M Pastores, Neil A Halpern
PURPOSE: To determine the feasibility of continuous recording of sound and light in the intensive care unit (ICU). MATERIALS AND METHODS: Four 1-hour baseline scenarios in an empty ICU patient room by day and night (doors open or closed and maximal or minimal lighting) and two daytime scenarios simulating a stable and unstable patient (quiet or loud devices and staff) were conducted. Sound and light levels were continuously recorded using a commercially available multisensor monitor and transmitted via the hospital's network to a cloud-based data storage and management system...
December 30, 2016: Journal of Critical Care
https://www.readbyqxmd.com/read/28163833/ambulatory-pulmonary-artery-pressure-monitoring-in-advanced-heart-failure-patients
#8
REVIEW
Srikanth Yandrapalli, Anoshia Raza, Sohaib Tariq, Wilbert S Aronow
Heart failure (HF) is an emerging epidemic associate with significant morbidity, mortality, and health care expenditure. Although there were major advances in pharmacologic and device based therapies for the management of HF, mortality of this condition remains high. Accurate monitoring of HF patients for exacerbations is very important to reduce recurrent hospitalizations and its associated complications. With the failure of clinical signs, tele-monitoring, and laboratory bio-markers to function as early markers of HF exacerbations, more sophisticated techniques were sought to accurately predict the circulatory status in HF patients in order to execute timely pharmacological intervention to reduce frequent hospitalizations...
January 26, 2017: World Journal of Cardiology
https://www.readbyqxmd.com/read/28159104/how-cutting-edge-technologies-impact-the-design-of-electrochemical-bio-sensors-for-environmental-analysis-a-review
#9
REVIEW
Fabiana Arduini, Stefano Cinti, Viviana Scognamiglio, Danila Moscone, Giuseppe Palleschi
Through the years, scientists have developed cutting-edge technologies to make (bio)sensors more convenient for environmental analytical purposes. Technological advancements in the fields of material science, rational design, microfluidics, and sensor printing, have radically shaped biosensor technology, which is even more evident in the continuous development of sensing systems for the monitoring of hazardous chemicals. These efforts will be crucial in solving some of the problems constraining biosensors to reach real environmental applications, such as continuous analyses in field by means of multi-analyte portable devices...
March 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28157947/ultra-wide-frequency-response-measurement-of-an-optical-system-with-a-dc-photo-detector
#10
Katanya B Kuntz, Trevor A Wheatley, Hongbin Song, James G Webb, Mohamed A Mabrok, Elanor H Huntington, Hidehiro Yonezawa
Precise knowledge of an optical device's frequency response is crucial for it to be useful in most applications. Traditional methods for determining the frequency response of an optical system (e.g. optical cavity or waveguide modulator) usually rely on calibrated broadband photo-detectors or complicated RF mixdown operations. As the bandwidths of these devices continue to increase, there is a growing need for a characterization method that does not have bandwidth limitations, or require a previously calibrated device...
January 23, 2017: Optics Express
https://www.readbyqxmd.com/read/28157836/continuous-capnography-monitoring-during-resuscitation-in-a-transitional-large-mammalian-model-of-asphyxial-cardiac-arrest
#11
Praveen Chandrasekharan, Payam Vali, Munmun Rawat, Bobby Mathew, Sylvia F Gugino, Carmon Koenigschnekt, Justin Helman, Jayasree Nair, Sara Berkelhamer, Satyan Lakshminrusimha
BACKGROUND: In neonates requiring chest compression (CC) during resuscitation, neonatal resuscitation program (NRP) recommends against relying on a single feedback device such as end-tidal carbon dioxide (ETCO2) or SpO2 to determine return of spontaneous circulation (ROSC) until more evidence becomes available. METHODS: We evaluated the role of monitoring ETCO2 during resuscitation in a lamb model of cardiac arrest induced by umbilical cord occlusion (n=21). Lambs were resuscitated as per NRP guidelines...
February 3, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28144685/laboratory-calibration-of-a-pocis-like-sampler-based-on-molecularly-imprinted-polymers-for-glyphosate-and-ampa-sampling-in-water
#12
Catherine Berho, Bérengère Claude, Emeline Coisy, Anne Togola, Sami Bayoudh, Philippe Morin, Laurence Amalric
For more than 15 years, integrative passive sampling has been successfully used for monitoring contaminants in water, but no passive sampling device exists for strongly polar organic compounds, such as glyphosate. We thus propose a polar organic chemical integrative sampler (POCIS)-like tool dedicated to glyphosate and its main degradation product aminomethylphosphonic acid (AMPA), and describe the laboratory calibration of such a tool for calculating the sampling rates of glyphosate and AMPA. This passive sampler consists of a POCIS with molecularly imprinted polymer as a receiving phase and a polyethersulfone diffusion membrane...
January 31, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28143805/assessing-the-influence-of-a-fitbit-physical-activity-monitor-on-the-exercise-practices-of-emergency-medicine-residents-a-pilot-study
#13
Justin David Schrager, Philip Shayne, Sarah Wolf, Shamie Das, Rachel Elizabeth Patzer, Melissa White, Sheryl Heron
BACKGROUND: Targeted interventions have improved physical activity and wellness of medical residents. However, no exercise interventions have focused on emergency medicine residents. OBJECTIVE: This study aimed to measure the effectiveness of a wearable device for tracking physical activity on the exercise habits and wellness of this population, while also measuring barriers to adoption and continued use. METHODS: This pre-post cohort study enrolled 30 emergency medicine residents...
January 31, 2017: JMIR MHealth and UHealth
https://www.readbyqxmd.com/read/28143653/methods-accuracy-and-clinical-implications-of-atrial-fibrillation-detection-by-cardiac-implantable-electronic-devices
#14
Diana Solari, Edoardo Bertero, Roberta Miceli, Claudio Brunelli, Pietro Ameri, Marco Canepa
Atrial fibrillation (AF) is the most common arrhythmia in the developed countries and is associated with an increased risk of thromboembolic events and heart failure. Episodes of AF are often asymptomatic and intermittent, eluding diagnosis with non-continuous monitoring techniques. Cardiac implantable electronic devices (CIEDs) represent the gold standard for detecting asymptomatic AF. Improper CIED programming may however increase the risk of false-positive detection of atrial tachyarrhythmias, leading to inappropriate clinical management of patients...
January 14, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28141600/preventing-pressure-injuries-in-neonates-undergoing-therapeutic-hypothermia-for-hypoxic-ischemic-encephalopathy-an-interprofessional-quality-improvement-project
#15
Alexandra Luton, Jae Hernandez, Clive Robert Patterson, Jill Nielsen-Farrell, Anita Thompson, Jeffrey R Kaiser
BACKGROUND: Hospital-acquired pressure injuries (HAPIs) can be caused by multiple factors including pressure, shear, friction, moisture/incontinence, device-related pressure, immobility, inactivity, and nutritional deficits. Along with immobility, medical device-related (MDR) HAPIs are a primary cause of pressure injury in neonates, as the clinical practice setting has become increasingly technologically advanced. It is estimated that up to 50% of HAPIs are MDR in pediatric patients. Neonates are at particular risk for HAPI because of their specific anatomical, physiological, and developmental vulnerabilities...
January 30, 2017: Advances in Neonatal Care: Official Journal of the National Association of Neonatal Nurses
https://www.readbyqxmd.com/read/28138898/short-term-changes-in-cardiovascular-hemodynamics-in-response-to-bariatric-surgery-and-weight-loss-using-the-nexfin%C3%A2-non-invasive-continuous-monitoring-device-a-pilot-study
#16
Sjaak Pouwels, Bianca Lascaris, Simon W Nienhuijs, Arthur R Bouwman, Marc P Buise
BACKGROUND: Compared to healthy individuals, obese have significantly higher systolic and diastolic blood pressure, mean arterial pressure, heart rate, and cardiac output. The aim of this study was to evaluate cardiovascular hemodynamic changes before and 3 months after bariatric surgery. METHODS: Patients scheduled for bariatric surgery between the 29th of September 2016 and 24th of March 2016 were included and compared with 24 healthy individuals. Hemodynamic measurements were performed preoperatively and 3 months after surgery, using the Nexfin® non-invasive continuous hemodynamic monitoring device (Edwards Lifesciences/BMEYE B...
January 30, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28138532/printed-multifunctional-flexible-device-with-an-integrated-motion-sensor-for-health-care-monitoring
#17
Yuki Yamamoto, Shingo Harada, Daisuke Yamamoto, Wataru Honda, Takayuki Arie, Seiji Akita, Kuniharu Takei
Real-time health care monitoring may enable prediction and prevention of disease or improve treatment by diagnosing illnesses in the early stages. Wearable, comfortable, sensing devices are required to allow continuous monitoring of a person's health; other important considerations for this technology are device flexibility, low-cost components and processing, and multifunctionality. To address these criteria, we present a flexible, multifunctional printed health care sensor equipped with a three-axis acceleration sensor to monitor physical movement and motion...
November 2016: Science Advances
https://www.readbyqxmd.com/read/28138529/epidermal-mechano-acoustic-sensing-electronics-for-cardiovascular-diagnostics-and-human-machine-interfaces
#18
Yuhao Liu, James J S Norton, Raza Qazi, Zhanan Zou, Kaitlyn R Ammann, Hank Liu, Lingqing Yan, Phat L Tran, Kyung-In Jang, Jung Woo Lee, Douglas Zhang, Kristopher A Kilian, Sung Hee Jung, Timothy Bretl, Jianliang Xiao, Marvin J Slepian, Yonggang Huang, Jae-Woong Jeong, John A Rogers
Physiological mechano-acoustic signals, often with frequencies and intensities that are beyond those associated with the audible range, provide information of great clinical utility. Stethoscopes and digital accelerometers in conventional packages can capture some relevant data, but neither is suitable for use in a continuous, wearable mode, and both have shortcomings associated with mechanical transduction of signals through the skin. We report a soft, conformal class of device configured specifically for mechano-acoustic recording from the skin, capable of being used on nearly any part of the body, in forms that maximize detectable signals and allow for multimodal operation, such as electrophysiological recording...
November 2016: Science Advances
https://www.readbyqxmd.com/read/28135793/-patient-monitoring-and-associated-devices-during-endoscopic-sedation
#19
REVIEW
Sung Hoon Moon, Hyung Keun Kim, Dae Seong Myung, Soon Man Yoon, Won Moon
Sedation is an essential component for gastrointestinal endoscopy. It allows patients to tolerate unpleasant endoscopic procedures by relieving anxiety, discomfort, or pain. It also reduces patient's risk of physical injury during endoscopic procedures, while providing the endoscopist with an adequate setting for a detailed examination. For the safety during endoscopic sedation, patient monitoring is crucial. Minimal monitoring requirements during endoscopic sedation are periodic assessment of blood pressure and application of continuous pulse oximetry...
January 25, 2017: Korean Journal of Gastroenterology, Taehan Sohwagi Hakhoe Chi
https://www.readbyqxmd.com/read/28134838/development-and-long-term-stability-of-a-novel-microbial-fuel-cell-bod-sensor-with-mno%C3%A2-catalyst
#20
Shailesh Kharkwal, Yi Chao Tan, Min Lu, How Yong Ng
A novel microbial fuel cell (MFC)-based biosensor was designed for continuous monitoring of biochemical oxygen demand (BOD) in real wastewater. To lower the material cost, manganese dioxide (MnO₂) was tested as an innovative cathode catalyst for oxygen reduction in a single chamber air-cathode MFC, and two different crystalline structures obtained during synthesis of MnO₂ (namely β- and γ-MnO₂) were compared. The BOD sensor was studied in a comprehensive way, using both sodium acetate solution and real domestic wastewater (DWW)...
January 28, 2017: International Journal of Molecular Sciences
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