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https://www.readbyqxmd.com/read/28814965/convolutional-neural-network-for-the-detection-of-end-diastole-and-end-systole-frames-in-free-breathing-cardiac-magnetic-resonance-imaging
#1
Fan Yang, Yan He, Mubashir Hussain, Hong Xie, Pinggui Lei
Free-breathing cardiac magnetic resonance (CMR) imaging has short examination time with high reproducibility. Detection of the end-diastole and the end-systole frames of the free-breathing cardiac magnetic resonance, supplemented by visual identification, is time consuming and laborious. We propose a novel method for automatic identification of both the end-diastole and the end-systole frames, in the free-breathing CMR imaging. The proposed technique utilizes the convolutional neural network to locate the left ventricle and to obtain the end-diastole and the end-systole frames from the respiratory motion signal...
2017: Computational and Mathematical Methods in Medicine
https://www.readbyqxmd.com/read/28811209/prevalence-of-pulmonary-embolism-in-patients-presenting-to-the-emergency-department-with-syncope
#2
Alison Frizell, Nicole Fogel, Jacob Steenblik, Margaret Carlson, Joseph Bledsoe, Troy Madsen
OBJECTIVES: A recent study reported a high prevalence of pulmonary embolism (PE) among patients admitted with syncope. We sought to determine whether these findings were validated in our patient population. METHODS: We performed a retrospective, secondary analysis of prospectively gathered data from patients presenting with syncope to an academic emergency department (ED) from July 2010 to December 2015. We analyzed baseline information from the time of the ED visit, recorded outcomes during the hospital stay, and contacted patients by phone at least 30days after the ED visit...
July 31, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28809112/mofs-for-the-sensitive-detection-of-ammonia-deployment-of-fcu-mof-thin-films-as-effective-chemical-capacitive-sensors
#3
Ayalew Hussen Assen, Omar Yassine, Osama Shekhah, Mohamed Eddaoudi, Khaled N Salama
This work reports on the fabrication and deployment of a select metal-organic framework (MOF) thin film as an advanced chemical capacitive sensor for the sensing/detection of ammonia (NH3) at room temperature. Namely, the MOF thin film sensing layer consists of a rare-earth (RE) MOF (RE-fcu-MOF) deposited on a capacitive interdigitated electrode (IDE). Purposely, the chemically stable naphthalene-based RE-fcu-MOF (NDC-Y-fcu-MOF) was elected and prepared/arranged as a thin film on a pre-functionalized capacitive IDE via the solvothermal growth method...
August 15, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28807989/coaxial-tubing-systems-increase-artificial-airway-resistance-and-work-of-breathing
#4
Christin Wenzel, Stefan Schumann, Johannes Spaeth
BACKGROUND: Tubing systems are an essential component of the ventilation circuit, connecting the ventilator to the patient's airways. Coaxial tubing systems incorporate the inspiratory tube within the lumen of the expiratory one. We hypothesized that by design, these tubing systems increase resistance to air flow compared with conventional ones. METHODS: We investigated the flow-dependent pressure gradient across coaxial, conventional disposable, and conventional reusable tubing systems from 3 different manufacturers...
August 14, 2017: Respiratory Care
https://www.readbyqxmd.com/read/28802387/sleep-quality-and-communication-aspects-in-children
#5
Camila de Castro Corrêa, Maria Renata José, Eduardo Carvalho Andrade, Mariza Ribeiro Feniman, Ana Paula Fukushiro, Giédre Berretin-Felix, Luciana Paula Maximino
OBJECTIVES: To correlate quality of life of children in terms of sleep, with their oral language skills, auditory processing and orofacial myofunctional aspects. METHODS: Nineteen children (12 males and seven females, in the mean age 9.26) undergoing otorhinolaryngological and speech evaluations participated in this study. The OSA-18 questionnaire was applied, followed by verbal and nonverbal sequential memory tests, dichotic digit test, nonverbal dichotic test and Sustained Auditory Attention Ability Test, related to auditory processing...
September 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28800103/the-ultrasonic-directional-tidal-breathing-pattern-sensor-equitable-design-realization-based-on-phase-information
#6
Arijit Sinharay, Raj Rakshit, Anwesha Khasnobish, Tapas Chakravarty, Deb Ghosh, Arpan Pal
Pulmonary ailments are conventionally diagnosed by spirometry. The complex forceful breathing maneuver as well as the extreme cost of spirometry renders it unsuitable in many situations. This work is aimed to facilitate an emerging direction of tidal breathing-based pulmonary evaluation by designing a novel, equitable, precise and portable device for acquisition and analysis of directional tidal breathing patterns, in real time. The proposed system primarily uses an in-house designed blow pipe, 40-kHz air-coupled ultrasound transreceivers, and a radio frequency (RF) phase-gain integrated circuit (IC)...
August 11, 2017: Sensors
https://www.readbyqxmd.com/read/28798197/corp-measurement-of-lung-function-in-small-animals
#7
Jason H T Bates
The measurement of lung function in mice and rats is crucial for understanding how well small animal models of pulmonary disease recapitulate human clinical pathology, but brings with it the challenge of making accurate measurements in animals as small as a mouse. Overcoming these challenges can be achieved in a number of ways, each based on a model idealization of how the lung works as a mechanical system. Accordingly, it is important to understand the theoretical basis on which an assessment of lung function rests in order to interpret experimental measurements appropriately...
August 10, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28797888/the-weighty-issue-of-obesity-in-paediatric-respiratory-medicine
#8
REVIEW
Dominic A Fitzgerald
Some have observed that developed world is fat and getting fatter. This is even extending into the developing world, and it is important to appreciate that the consequences of childhood obesity last into adulthood and are associated with premature death. From the paediatric respiratory perspective, the deposition of excess adipose tissue in the thoraco-abdominal region begins early in life and is believed to alter diaphragm mobility and chest wall expansion, reduce lung compliance, and result in a rapid shallow breathing pattern with an increased work of breathing and reduction in maximum ventilatory capacity...
June 11, 2017: Paediatric Respiratory Reviews
https://www.readbyqxmd.com/read/28795775/interventions-to-reduce-perceived-stress-among-graduate-students-a-systematic-review-with-implications-for-evidence-based-practice
#9
Susan B Stillwell, Amber L Vermeesch, Jane G Scott
BACKGROUND: Stress is a part of daily life for graduate students, including graduate nursing students. Contemporary graduate nursing students are facing unprecedented challenges to meet rigorous academic standards as they prepare for their advanced professional role to meet the demands of the nation's complex and ever-changing healthcare system. Empowering graduate nursing students to ease their perceived stress and minimize undesirable health effects may benefit their capacity to adapt and successfully manage perceived stress in their future healthcare role...
August 10, 2017: Worldviews on Evidence-based Nursing
https://www.readbyqxmd.com/read/28794144/nasal-high-flow-therapy-a-novel-treatment-rather-than-a-more-expensive-oxygen-device
#10
REVIEW
Eleni Ischaki, Ioannis Pantazopoulos, Spyros Zakynthinos
Nasal high flow is a promising novel oxygen delivery device, whose mechanisms of action offer some beneficial effects over conventional oxygen systems. The administration of a high flow of heated and humidified gas mixture promotes higher and more stable inspiratory oxygen fraction values, decreases anatomical dead space and generates a positive airway pressure that can reduce the work of breathing and enhance patient comfort and tolerance. Nasal high flow has been used as a prophylactic tool or as a treatment device mostly in patients with acute hypoxaemic respiratory failure, with the majority of studies showing positive results...
September 30, 2017: European Respiratory Review: An Official Journal of the European Respiratory Society
https://www.readbyqxmd.com/read/28790149/evaluation-of-endotracheal-tube-scraping-on-airway-resistance
#11
J Brady Scott, Meagan N Dubosky, David L Vines, Adewunmi S Sulaiman, Kyle R Jendral, Gagan Singh, Ankeet Patel, Carl A Kaplan, David P Gurka, Robert A Balk
BACKGROUND: Spontaneous breathing trials (SBTs) are used to assess the readiness for discontinuation of mechanical ventilation. When airway resistance (Raw) is elevated, the imposed work of breathing can lead to prolongation of mechanical ventilation. Biofilm and mucus build-up within the endotracheal tube (ETT) can increase Raw. Scraping the ETT can remove the biofilm build-up and decrease mechanical Raw. The primary aim of this study was to evaluate the impact of ETT scraping on Raw...
August 8, 2017: Respiratory Care
https://www.readbyqxmd.com/read/28776062/a-mindfulness-practice-for-communication-sciences-and-disorders-undergraduate-and-speech-language-pathology-graduate-students-effects-on-stress-self-compassion-and-perfectionism
#12
Ann R Beck, Heidi Verticchio, Scott Seeman, Emma Milliken, Heidi Schaab
Purpose: The purpose of the present study was to explore the effects of a mindfulness practice on participants' levels of self-compassion, perfectionism, attention, and perceived and biological stress. Method: This was a between-groups design. Experimental participants engaged in a short mindfulness practice weekly for one academic semester; control participants did not. All participants completed three self-report scales measuring perceived stress, self-compassion, and perfectionism before and after mindfulness sessions...
August 15, 2017: American Journal of Speech-language Pathology
https://www.readbyqxmd.com/read/28775065/effect-of-hypoxia-and-hyperoxia-on-exercise-performance-in-healthy-individuals-and-in-patients-with-pulmonary-hypertension-a-systematic-review
#13
Silvia Ulrich, Simon Raphael Schneider, Konrad E Bloch
Exercise performance is determined by oxygen supply to working muscles and vital organs. In healthy individuals, exercise performance is limited in the hypoxic environment at altitude, when oxygen delivery is diminished due to the reduced alveolar and arterial oxygen partial pressures. In patients with pulmonary hypertension, exercise performance is already reduced near sea level due to impairments of the pulmonary circulation and gas exchange and, presumably, these limitations are more pronounced at altitude...
August 3, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28774947/bayesian-estimation-of-physiological-parameters-governing-a-dynamic-two-compartment-model-of-exhaled-nitric-oxide
#14
Patrick Muchmore, Edward B Rappaport, Sandrah P Eckel
The fractional concentration of nitric oxide in exhaled breath (feNO) is a biomarker of airway inflammation with applications in clinical asthma management and environmental epidemiology. feNO concentration depends on the expiratory flow rate. Standard feNO is assessed at 50 mL/sec, but "extended NO analysis" uses feNO measured at multiple different flow rates to estimate parameters quantifying proximal and distal sources of NO in the lower respiratory tract. Most approaches to modeling multiple flow feNO assume the concentration of NO throughout the airway has achieved a "steady-state...
August 2017: Physiological Reports
https://www.readbyqxmd.com/read/28772895/a-fast-humidity-sensor-based-on-li%C3%A2-%C2%BA-doped-sno%C3%A2-one-dimensional-porous-nanofibers
#15
Min Yin, Fang Yang, Zhaojie Wang, Miao Zhu, Ming Liu, Xiuru Xu, Zhenyu Li
One-dimensional SnO₂- and Li⁺-doped SnO₂ porous nanofibers were easily fabricated via electrospinning and a subsequent calcination procedure for ultrafast humidity sensing. Different Li dopant concentrations were introduced to investigate the dopant's role in sensing performance. The response properties were studied under different relative humidity levels by both statistic and dynamic tests. The best response was obtained with respect to the optimal doping of Li⁺ into SnO₂ porous nanofibers with a maximum 15 times higher response than that of pristine SnO₂ porous nanofibers, at a relative humidity level of 85%...
May 16, 2017: Materials
https://www.readbyqxmd.com/read/28772021/self-regulated-and-temporal-control-of-a-breathing-microgel-mediated-by-enzymatic-reaction
#16
Jan van Hest, Hailong Che, Bastiaan Buddingh'
Naturally occurring systems have the ability to self-regulate, which plays a key role in their structural and functional adaption. The autonomous behaviour in living systems is biocatalytically controlled by the continuous consumption of energy to remain in a non-equilibrium condition. In this work, we show the construction of a self-regulated "breathing" microgel that uses chemical fuels to keep the system in the out-of-equilibrium state. The enzyme urease is utilized to programme a feedback-induced pH change which in turn tunes the size switch and fluorescence intensity of the microgel...
August 3, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28767523/respiratory-mechanical-and-cardiorespiratory-consequences-of-cycling-with-aerobars
#17
Jesse M Charlton, Andrew H Ramsook, Reid A Mitchell, Michael A Hunt, Joseph H Puyat, Jordan A Guenette
PURPOSE: Aerobars place a cyclist in a position where the trunk is flexed forward and the elbows are close to the midline of the body. This position is known to improve cycling aerodynamics and time trial race performance compared to upright cycling positions. However, the aggressive nature of this position may have important cardiorespiratory and metabolic consequences. The purpose of this investigation was to examine the respiratory mechanical, ventilatory, metabolic, and sensory consequences of cycling while using aerobars during laboratory based cycling...
July 31, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28765494/effects-of-expiratory-positive-airway-pressure-on-exercise-tolerance-dynamic-hyperinflation-and-dyspnea-in-copd
#18
Ricardo Gass, Pietro Merola, Mariane B Monteiro, Dannuey M Cardoso, Dulciane N Paiva, Paulo Jz Teixeira, Marli M Knorst, Danilo C Berton
INTRODUCTION: The application of expiratory positive airway pressure (EPAP) in patients with COPD during exercise may reduce dynamic hyperinflation, while, on the other hand, it can increase the resistive work of breathing. Therefore, we evaluated the effects of 2 intensities of EPAP during exercise on tolerance, dynamic hyperinflation, and dyspnea in subjects with moderate to very severe COPD. METHODS: We performed a cross-sectional, experimental, 4-visit study...
August 1, 2017: Respiratory Care
https://www.readbyqxmd.com/read/28765493/variability-of-tidal-volume-in-patient-triggered-mechanical-ventilation-in-ards
#19
Sophie Perinel-Ragey, Loredana Baboi, Claude Guérin
BACKGROUND: Limiting tidal volume (VT) in patients with ARDS may not be achieved once patient-triggered breaths occur. Furthermore, ICU ventilators offer numerous patient-triggered modes that work differently across brands. We systematically investigated, using a bench model, the effect of patient-triggered modes on the size and variability of VT at different breathing frequencies (f), patient effort, and ARDS severity. METHODS: We used a V500 Infinity ICU ventilator connected to an ASL 5000 lung model whose compliance was mimicking mild, moderate, and severe ARDS...
August 1, 2017: Respiratory Care
https://www.readbyqxmd.com/read/28763554/does-this-child-have-pneumonia-the-rational-clinical-examination-systematic-review
#20
REVIEW
Sonal N Shah, Richard G Bachur, David L Simel, Mark I Neuman
Importance: Pneumonia is a leading cause of morbidity and mortality in children. It is important to identify the clinical symptoms and physical examination findings associated with pneumonia to improve timely diagnosis, prevent significant morbidity, and limit antibiotic overuse. Objective: To systematically review the accuracy of symptoms and physical examination findings in identifying children with radiographic pneumonia. Data Sources and Study Selection: MEDLINE and Embase (1956 to May 2017) were searched, along with reference lists from retrieved articles, to identify diagnostic studies of pediatric pneumonia across a broad age range that had to include children younger than age 5 years (although some studies enrolled children up to age 19 years); 3644 unique articles were identified, of which 23 met inclusion criteria...
August 1, 2017: JAMA: the Journal of the American Medical Association
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