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https://www.readbyqxmd.com/read/28743153/-how-much-alarm-can-the-human-being-tolerate
#1
Benedikt Lorenz, Jürgen Peters, Ulrich H Frey
Due to growing technisation of intensive care the number of devices with integrated alarm systems is steadily increasing. However, most of the sounding alarms are false alarms causing high levels of frustration, aggression and inappropriate behaviour amongst the medical personnel. All this jeopardises patient care. The high number of alarms also disturb the patients interrupting their sleep and provokes anxiety, and also increases the already high noise level in intensive care units and the operating theatre alike...
July 2017: Anästhesiologie, Intensivmedizin, Notfallmedizin, Schmerztherapie: AINS
https://www.readbyqxmd.com/read/28743094/a-personalized-medicine-approach-to-the-design-of-dry-powder-inhalers-selecting-the-optimal-amount-of-bypass
#2
Thomas Kopsch, Darragh Murnane, Digby Symons
In dry powder inhalers (DPIs) the patient's inhalation manoeuvre strongly influences the release of drug. Drug release from a DPI may also be influenced by the size of any air bypass incorporated in the device. If the amount of bypass is high less air flows through the entrainment geometry and the release rate is lower. In this study we propose to reduce the intra- and inter-patient variations of drug release by controlling the amount of air bypass in a DPI. A fast computational method is proposed that can predict how much bypass is needed for a specified drug delivery rate for a particular patient...
July 22, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28743083/hall-effect-biosensors-with-ultraclean-graphene-film-for-improved-sensitivity-of-label-free-dna-detection
#3
Phan Thi Kim Loan, Dongqin Wu, Chen Ye, Xiaoqing Li, Vu Thanh Tra, Qiuping Wei, Li Fu, Aimin Yu, Lain-Jong Li, Cheng-Te Lin
The quality of graphene strongly affects the performance of graphene-based biosensors which are highly demanded for the sensitive and selective detection of biomolecules, such as DNA. This work reported a novel transfer process for preparing a residue-free graphene film using a thin gold supporting layer. A Hall effect device made of this gold-transferred graphene was demonstrated to significantly enhance the sensitivity (≈ 5 times) for hybridization detection, with a linear detection range of 1pM to 100nM for DNA target...
July 19, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28743043/neurotrophy-and-immunomodulation-of-induced-neural-stem-cell-grafts-in-a-mouse-model-of-closed-head-injury
#4
Mou Gao, Hui Yao, Qin Dong, Yan Zhang, Yang Yang, Yihua Zhang, Zhijun Yang, Minhui Xu, Ruxiang Xu
Closed head injury (CHI) usually results in severe and permanent neurological impairments, which are caused by several intertwined phenomena, such as cerebral edema, blood-brain barrier (BBB) disruption, neuronal loss, astroglial scarring and inflammation. We previously reported that induced neural stem cells (iNSCs), similar to neural stem cells (NSCs), can accelerate neurological recovery in vivo and produce neurotrophic factors in vitro. However, the effects of iNSC neurotrophy following CHI were not determined...
July 18, 2017: Stem Cell Research
https://www.readbyqxmd.com/read/28743026/evaluation-of-the-ivet-%C3%A2-birth-monitoring-system-in-primiparous-dairy-heifers
#5
G Henningsen, H Marien, W Hasseler, M Feldmann, H-A Schoon, M Hoedemaker, K Herzog
The objective was to validate the iVET(®) birth monitoring system and to determine if it reduced fetal death in primiparous dairy heifers over a 1-y interval. There were 359 pregnant heifers enrolled; 167 heifers in the iVET(®) group were monitored electronically and the remaining 192 (controls) were monitored visually for onset of Stage 2 labor, according to routine farm management. In addition, as a reference, all heifers were observed throughout the study by two independent investigators. Calves born dead or that died within 24 h after birth were defined as stillborn...
July 10, 2017: Theriogenology
https://www.readbyqxmd.com/read/28742968/enhancing-the-elasticity-of-ultrathin-single-wall-carbon-nanotube-films-with-colloidal-nanocrystals
#6
Meshal Alzaid, Joseph Roth, Yuezhou Wang, Eid Almutairi, Samuel L Brown, Traian Dumitrica, Erik K Hobbie
Thin bilayers of contrasting nanomaterials are ubiquitous in solution-processed electronic devices and have potential relevance to a number of applications in flexible electronics. Motivated by recent mesoscopic simulations demonstrating synergistic mechanical interactions between thin films of single-wall carbon nanotubes (SWCNTs) and spherical nanocrystal (NC) inclusions, we use a thin-film wrinkling approach to query the compressive mechanics of hybrid nanotube/nanocrystal coatings adhered to soft polymer substrates...
July 25, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28742887/practical-improvements-for-medical-device-evaluation
#7
Daniel B Kramer, Robert W Yeh
No abstract text is available yet for this article.
July 25, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28742785/an-effective-negative-pressure-wound-therapy-1-compatible-local-antibiotic-delivery-device
#8
Ben C C Rand, Joseph C Wenke
OBJECTIVES: The current clinical standard for local antibiotic depot is polymethylmethacrylate (PMMA) beads. Unfortunately, these are not ideal and negative pressure wound therapy (NPWT) reduces their limited effectiveness. Recently, a chitosan sponge has been shown to be an effective carrier of antibiotics. Since it acts as a delivery vehicle with increased wound contact area instead of an antibiotic depot, it may be more effective. The objectives of this study are to determine if 1) a chitosan sponge would be more effective than PMMA beads as a local antibiotic delivery device and 2) the chitosan sponge remains an effective method of delivery when used in conjunction with NPWT...
July 24, 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28742723/supraglottic-atomization-of-surfactant-in-spontaneously-breathing-lambs-receiving-continuous-positive-airway-pressure
#9
Ilaria Milesi, David G Tingay, Anna Lavizzari, Federico Bianco, Emanuela Zannin, Paolo Tagliabue, Fabio Mosca, Maria Luisa Ventura, Anushi Rajapaksa, Elizabeth J Perkins, Don Black, Marco Di Castri, Magdy Sourial, Gerhard Pohlmann, Raffaele L Dellaca'
OBJECTIVES: To determine the short-term tolerance, efficacy, and lung deposition of supraglottic atomized surfactant in spontaneously breathing lambs receiving continuous positive airway pressure. DESIGN: Prospective, randomized animal study. SETTING: Animal research laboratory. SUBJECTS: Twenty-two preterm lambs on continuous positive airway pressure (132 ± 1 d gestational age). INTERVENTIONS: Animals receiving continuous positive airway pressure via binasal prongs at 8 cm H2O were randomized to receive atomized surfactant at approximately 60-minute of life (atom; n = 15) or not (control; n = 7)...
July 22, 2017: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/28742649/thoracoscopic-implantation-of-an-array-electrode-in-the-pericardium-transverse-sinus-to-reduce-defibrillation-threshold
#10
Antonio Curnis, Claudio Muneretto, Gianluigi Bisleri, Manuel Cerini, Lorenza Inama, Francesca Salghetti, Raffaella De Vito, Laura Giroletti, Fabrizio Rosati, Daniele Giacopelli, Francesca Vassanelli, Luca Bontempi
Among the implantable cardioverter defibrillator recipients, there is still a subgroup of patients in whom the defibrillation threshold is too high and the maximal shock output of the implantable cardioverter defibrillator can fail to terminate a ventricular arrhythmia. We report a new thoracoscopic minimally invasive approach to place a standard array electrode in the transverse pericardial sinus of a patient implanted with a cardiac resynchronization and defibrillation therapy device with persistent high defibrillation threshold...
July 25, 2017: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
https://www.readbyqxmd.com/read/28742540/comparison-of-tissue-yield-using-frictional-fabric-brush-versus-sharp-curettage-for-endocervical-curettage
#11
Justin T Diedrich, Sumra Rathore, Joel S Bentz
OBJECTIVE: The aim of the study was to evaluate and compare the diagnostic yield of conventional endocervical curettage (ECC) with fabric-based ECC in a consistent physician group. MATERIALS AND METHODS: This is a retrospective case-control study of patients who underwent ECC both before and after introduction of a fabric-based ECC device. Histologic examination of curettings was categorized as satisfactory, limited, or inadequate. The Kruskall-Wallis test was used to compare proportions of gross descriptions and final diagnoses between groups...
July 25, 2017: Journal of Lower Genital Tract Disease
https://www.readbyqxmd.com/read/28742532/pulmonary-pressure-assessment-with-the-total-artificial-heart
#12
David L Joyce, Margaret M Redfield, Sudhir S Kushwaha, Atta Behfar, Barry A Borlaug, Richard C Daly, Gurpreet S Sandhu, Lyle D Joyce
Reversal of pulmonary hypertension has been observed in patients during a bridge to transplant with a left ventricular assist device. Total artificial heart (TAH) implant prevents subsequent right heart catheterization. Consequently, controversy exists over whether the prosthetic right ventricle improves or exacerbates pulmonary hypertension. A pulmonary artery (PA) pressure monitor was placed in two patients undergoing TAH implant, as a bridge to transplant. One patient had pulmonary hypertension at implant; the other had normal pulmonary pressures...
July 24, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28742506/bioimpedance-analysis-vs-dexa-as-a-screening-tool-for-osteosarcopenia-in-lean-overweight-and-obese-caucasian-postmenopausal-females
#13
Melpomeni Peppa, Charikleia Stefanaki, Athanasios Papaefstathiou, Dario Boschiero, George Dimitriadis, George P Chrousos
BACKGROUND-OBJECTIVES: We aimed at evaluating the efficiency of a newly developed, advanced Bioimpedance Analysis (BIA-ACC®) device as a screening tool for determining the degree of obesity and osteosarcopenia in postmenopausal women with normal or decreased bone density determined by Dual-Energy X-Ray absorptiometry (DEXA) in a representative sample of Greek postmenopausal women. METHODS: This is a single-gate cross-sectional study of body composition measured by BIA-ACC® and DEXA...
April 2017: Hormones: International Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28742362/convective-self-sustained-motion-in-mixtures-of-chemically-active-and-passive-particles
#14
Oleg Shklyaev, Henry Shum, Victor V Yashin, Anna C Balazs
We develop a model to describe the behavior of a system of active and passive particles in solution that can undergo spontaneous self-organization and self-sustained motion. The active particles are uniformly coated with a catalyst that decomposes the reagent in the surrounding fluid. The resulting variations in the fluid density give rise to a convective flow around the active particles. The generated fluid flow, in turn, drives the self-organization of both the active and passive particles into clusters that undergo self-sustained propulsion along the bottom wall of a microchamber...
July 25, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28742328/attachable-pulse-sensors-integrated-with-inorganic-optoelectronic-devices-for-monitoring-heart-rates-at-various-body-locations
#15
Juho Kim, Namyun Kim, Minjeong Kwon, Jongho Lee
Monitoring cardiovascular signals such as heart rate and blood flow provides critically important healthcare information about patients under medical care. However, when the sensors are worn for extended times, the sensors sometimes require higher mechanical compatibility with soft deformable tissues. In this paper, we report an attachable and flexible pulse sensor (bending radius: 2.4 mm), integrated with micro-inorganic photodetectors (thickness: 4.1 μm, photocurrent: 8.99 μA under 1.5 mW/cm(2)) and a red light emitting diode (620 nm), to monitor vital signals for extended times...
July 25, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28742323/response-characteristics-of-hydrogen-sensors-based-on-pmma-membrane-coated-palladium-nanoparticle-films
#16
Minrui Chen, Peng Mao, Yuyuan Qin, Jue Wang, Bo Xie, Xiuzhang Wang, Deyan Han, Guo-Hong Wang, Fengqi Song, Min Han, Jun-Ming Liu, Guanghou Wang
Coating polymeric membrane for gas separation is a feasible approach to fabricate gas sensors with selectivity. In this study, poly(methyl methacrylate) (PMMA) membrane-coated palladium (Pd) nanoparticle (NP) films were fabricated for high-performance hydrogen (H2) gas sensing by carrying out gas phase cluster deposition and PMMA spin coating. No changes were induced by the PMMA spin coating in the electrical transport and H2 sensing mechanisms of the Pd NP films. Measurements of H2 sensing demonstrated that the devices were capable of detecting H2 gas within the concentration range of 0-10% at room temperature and showed high selectivity to H2 due to the filtration effect of the PMMA membrane layer...
July 25, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28742320/nanoscale-probing-of-elastic-electronic-response-to-vacancy-motion-in-nio-nanocrystals
#17
Fran Kurnia, Jeffrey Cheung, Xuan Cheng, Jivika Sullaphen, Sergei V Kalinin, Nagarajan Valanoor, Rama K Vasudevan
Measuring the diffusion of ions and vacancies at nanometer length scales is crucial to understanding fundamental mechanisms driving technologies as diverse as batteries, fuel cells and memristors; yet such measurements remains extremely challenging. Here, we employ a multi-modal scanning probe microscopy (SPM) technique to explore the interplay between electronic, elastic and ionic processes via first order reversal curve I-V measurements in conjunction with electrochemical strain microscopy (ESM). The technique is employed to investigate the diffusion of oxygen vacancies in model epitaxial nickel oxide (NiO) nanocrystals with resistive switching characteristics...
July 25, 2017: ACS Nano
https://www.readbyqxmd.com/read/28742317/disposable-microfluidic-immunoarray-device-for-sensitive-breast-cancer-biomarker-detection
#18
Ricardo A G de Oliveira, Elsa María Materón, Matias Eliseo Melendez, Andre L Carvalho, Ronaldo C Faria
Breast cancer is the most common cancer in women worldwide. The detection of biomarkers has played a significant role in the early diagnosis and prognosis of breast cancer. Herein, we describe the construction of a disposable microfluidic immunoarray device (DµID) for rapid and low-cost detection of CA15-3 a protein biomarker for breast cancer. The DµID was constructed using a simple and rapid prototyping technique and was applied to detect CA15-3 in cancer patients. The DµID construction was based on a use of double-sided adhesive card with the microfluidic channel and a screen-printed array with 8 electrodes...
July 25, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28742136/can-a-tablet-based-cancellation-test-identify-cognitive-impairment-in-older-adults
#19
Ya-Huei Wu, Jean-Sébastien Vidal, Jocelyne de Rotrou, Sietske A M Sikkes, Anne-Sophie Rigaud, Matthieu Plichart
BACKGROUND AND OBJECTIVE: There has been a growing interest in using computerized cognitive assessment to detect age-related cognitive disorders. We have developed a tablet-based cancellation test (e-CT), previously shown as a reliable measure of executive functions and free of effect of familiarity with computer-based devices in healthy older adults. This study aimed to investigate the influence of demographics and current daily use of computer-based devices in older adults with Mild Cognitive Impairment (MCI) and Alzheimer's disease (AD)...
2017: PloS One
https://www.readbyqxmd.com/read/28742134/hemostasis-pad-combined-with-compression-device-after-transradial-coronary-procedures-a-randomized-controlled-trial
#20
Si-Hyuck Kang, Donghoon Han, Sehun Kim, Chang-Hwan Yoon, Jin-Joo Park, Jung-Won Suh, Young-Seok Cho, Tae-Jin Youn, In-Ho Chae
BACKGROUND: Arterial access and hemostasis are important processes during percutaneous coronary procedures. In this study, we tested if the use of chitosan-based pads on top of compression devices could improve hemostasis efficacy compared with compression devices alone after transradial coronary angiography or interventions. METHODS: This study was a single-center open-label randomized controlled trial. Patients who underwent coronary angiography or intervention with the transradial approach were randomly assigned to the study (compression device and a chitosan-based pad) or control (compression devices alone) group in a 2:1 fashion...
2017: PloS One
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