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Artificial lung

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https://www.readbyqxmd.com/read/28093826/highly-sensitive-detection-of-e2-activity-in-ubiquitination-using-an-artificial-ring-finger
#1
Kazuhide Miyamoto, Miho Sumida, Mayumi Yuasa-Sunagawa, Kazuki Saito
The ubiquitin-conjugating (E2) enzymes of protein ubiquitination are associated with various diseases such as leukemia, lung cancer, and breast cancer. Rapid and accurate detection of E2 enzymatic activities remains poor. Here, we described the detection of E2 activity on a signal accumulation ISFET biosensor (AMIS sensor) using an artificial RING finger (ARF). The use of ARF enables the simplified detection of E2 activity without a substrate. The high-sensitivity quantitative detection of E2 activities was demonstrated via real-time monitoring over a response range of femtomolar to micromolar concentrations...
January 17, 2017: Journal of Peptide Science: An Official Publication of the European Peptide Society
https://www.readbyqxmd.com/read/28075489/cough-augmentation-techniques-for-extubation-or-weaning-critically-ill-patients-from-mechanical-ventilation
#2
REVIEW
Louise Rose, Neill Kj Adhikari, David Leasa, Dean A Fergusson, Douglas McKim
BACKGROUND: There are various reasons why weaning and extubation failure occur, but ineffective cough and secretion retention can play a significant role. Cough augmentation techniques, such as lung volume recruitment or manually- and mechanically-assisted cough, are used to prevent and manage respiratory complications associated with chronic conditions, particularly neuromuscular disease, and may improve short- and long-term outcomes for people with acute respiratory failure. However, the role of cough augmentation to facilitate extubation and prevent post-extubation respiratory failure is unclear...
January 11, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28074528/respiratory-motion-prediction-and-prospective-correction-for-free-breathing-arterial-spin-labeled-perfusion-mri-of-the-kidneys
#3
Hao Song, Dan Ruan, Wenyang Liu, V Andrew Stenger, Rolf Pohmann, Maria A Fernandez Seara, Tejas Nair, Sungkyu Jung, Jingqin Luo, Yuichi Motai, Jingfei Ma, John D Hazle, H Michael Gach
PURPOSE: Respiratory motion prediction using an artificial neural network (ANN) was integrated with pseudocontinuous arterial spin labeling (pCASL) MRI to allow free-breathing perfusion measurements in the kidney. In this study, we evaluated the performance of the ANN to accurately predict the location of the kidneys during image acquisition. METHODS: A pencil-beam navigator was integrated with a pCASL sequence to measure lung/diaphragm motion during ANN training and the pCASL transit delay...
January 11, 2017: Medical Physics
https://www.readbyqxmd.com/read/28067267/polydatin-protects-the-respiratory-system-from-pm2-5-exposure
#4
Xiao-Dan Yan, Qi-Ming Wang, Cai Tie, Hong-Tao Jin, Yan-Xing Han, Jin-Lan Zhang, Xiao-Ming Yu, Qi Hou, Piao-Piao Zhang, Ai-Ping Wang, Pei-Cheng Zhang, Zhonggao Gao, Jian-Dong Jiang
Atmospheric particle is one of the risk factors for respiratory disease; however, their injury mechanisms are poorly understood, and prevention methods are highly desirable. We constructed artificial PM2.5 (aPM2.5) particles according to the size and composition of actual PM2.5 collected in Beijing. Using these artificial particles, we created an inhalation-injury animal model. These aPM2.5 particles simulate the physical and chemical characteristics of the actual PM2.5, and inhalation of the aPM2.5 in rat results in a time-dependent change in lung suggesting a declined lung function, injury from oxidative stress and inflammation in lung...
January 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28056789/evolutionary-diversification-of-pseudomonas-aeruginosa-in-an-artificial-sputum-model
#5
Emily V Davies, Chloe E James, Michael A Brockhurst, Craig Winstanley
BACKGROUND: During chronic lung infections of cystic fibrosis patients Pseudomonas aeruginosa populations undergo extensive evolutionary diversification. However, the selective drivers of this evolutionary process are poorly understood. To test the effects of temperate phages on diversification in P. aeruginosa biofilms we experimentally evolved populations of P. aeruginosa for approximately 240 generations in artificial sputum medium with or without a community of three temperate phages...
January 5, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28048860/su-f-p-54-guidelines-to-check-image-registration-qa-of-a-clinical-deformation-registration-software-a-single-institution-preliminary-study
#6
G Gill, S Souri, A Rea, Y Chen, J Antone, X Qian, A Riegel, P Taylor, M Marrero, F Diaz, Y Cao, A Jamshidi, S Barley, V Sorell, G Karangelis, T Button, E Klein
PURPOSE: The objective of this study is to verify and analyze the accuracy of a clinical deformable image registration (DIR) software. METHODS: To test clinical DIR software qualitatively and quantitatively, we focused on lung radiotherapy and analyzed a single (Lung) patient CT scan. Artificial anatomical changes were applied to account for daily variations during the course of treatment including the planning target volume (PTV) and organs at risk (OAR). The primary CT (pCT) and the structure set (pST) was deformed with commercial tool (ImSimQA-Oncology Systems Limited) and after artificial deformation (dCT and dST) sent to another commercial tool (VelocityAI-Varian Medical Systems)...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048107/su-f-i-04-low-dose-ct-lung-cancer-screening-protocol-evaluation
#7
E Nett, Y Imai
PURPOSE: The purpose of this study was to evaluate protocols for low dose CT (LDCT) for lung cancer screening on a Revolution CT (GE Healthcare; Waukesha, WI). Lung cancer the leading cause of cancer death for men and women, and more deaths are attributable to lung cancer than breast, colon and prostate cancers combined. Recently, the National Lung Screening Trial (NLST) showed LDCT screening resulted in a 20% reduction in lung cancer mortality and 6.7% in mortality from all causes [NEJM, 2011]...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28033114/3d-dosimetric-validation-of-motion-compensation-concepts-in-radiotherapy-using-an-anthropomorphic-dynamic-lung-phantom
#8
P Mann, M Witte, T Moser, C Lang, A Runz, W Johnen, M Berger, J Biederer, C P Karger
In this study, we developed a new setup for the validation of clinical workflows in adaptive radiation therapy, which combines a dynamic ex vivo porcine lung phantom and three-dimensional (3D) polymer gel dosimetry. The phantom consists of an artificial PMMA-thorax and contains a post mortem explanted porcine lung to which arbitrary breathing patterns can be applied. A lung tumor was simulated using the PAGAT (polyacrylamide gelatin gel fabricated at atmospheric conditions) dosimetry gel, which was evaluated in three dimensions by magnetic resonance imaging (MRI)...
December 29, 2016: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27999601/reservoir-cannulas-for-pediatric-oxygen-therapy-a-proof-of-concept-study
#9
Grace Wu, Alec Wollen, Robert M DiBlasi, Stephen Himley, Eugene Saxon, Glenn Austin, Jaclyn Delarosa, Rasa Izadnegahdar, Amy Sarah Ginsburg, Darin Zehrung
Hypoxemia is a complication of pneumonia-the leading infectious cause of death in children worldwide. Treatment generally requires oxygen-enriched air, but access in low-resource settings is expensive and unreliable. We explored use of reservoir cannulas (RCs), which yield oxygen savings in adults but have not been examined in children. Toddler, small child, and adolescent breathing profiles were simulated with artificial lung and airway models. An oxygen concentrator provided flow rates of 0 to 5 L/min via a standard nasal cannula (NC) or RC, and delivered oxygen fraction (FdO2) was measured...
2016: International Journal of Pediatrics
https://www.readbyqxmd.com/read/27996309/the-association-between-artificial-light-at-night-and-prostate-cancer-in-gwangju-city-and-south-jeolla-province-of-south-korea
#10
Ka Young Kim, Eunil Lee, Yun Jeong Kim, Jinsun Kim
ABSRACT Exposure to artificial light at night (ALAN) has been reported to be associated with various pathological changes including sleep deprivation, circadian rhythm disruption, and melatonin suppression with increase in various cancers such as breast or prostate cancers. In this study, we sought to elucidate the association between ALAN and prostate cancer in 27 districts within Gwangju City and urban and rural areas from South Jeolla Province in South Korea. We analyzed the correlation between ALAN and the incidence of a range of cancers by Poisson regression analysis, after adjustment for confounding risk factors, such as smoking, drinking, obesity, stress, air pollution (particulate matter <10 μm in diameter), urbanization (proportion of urbanized area), and the cancer screening rate...
December 20, 2016: Chronobiology International
https://www.readbyqxmd.com/read/27995129/biometric-monitoring-in-silicosis-to-detect-early-disease-and-monitor-lung-injury-not-quite-there
#11
Noa Ophir, Elizabeth Fireman
Biomonitoring of artificial stone-exposed workers http://ow.ly/Ut4J304amUr.
October 2016: ERJ Open Research
https://www.readbyqxmd.com/read/27992330/seamless-lesion-insertion-for-data-augmentation-in-cad-training
#12
Aria Pezeshk, Nicholas Petrick, Weijie Chen, Berkman Sahiner
The performance of a classifier is largely dependent on the size and representativeness of data used for its training. In circumstances where accumulation and/or labeling of training samples is difficult or expensive, such as medical applications, data augmentation can potentially be used to alleviate the limitations of small datasets. We have previously developed an image blending tool that allows users to modify or supplement an existing CT or mammography dataset by seamlessly inserting a lesion extracted from a source image into a target image...
December 14, 2016: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/27990197/transcatheter-aortic-valve-implantation-for-treatment-of-aortic-valve-stenosis-a-health-technology-assessment
#13
(no author information available yet)
BACKGROUND: Surgical aortic valve replacement (SAVR) is the gold standard for treating aortic valve stenosis. It is a major operation that requires sternotomy and the use of a heart-lung bypass machine, but in appropriately selected patients with symptomatic, severe aortic valve stenosis, the benefits of SAVR usually outweigh the harms. Transcatheter aortic valve implantation (TAVI) is a less invasive procedure that allows an artificial valve to be implanted over the poorly functioning valve...
2016: Ontario Health Technology Assessment Series
https://www.readbyqxmd.com/read/27969506/ps01-40-artificial-intelligence-system-analysis-and-simulation-modeling-in-optimization-of-management-for-lung-cancer-patients-topic-surgery
#14
Oleg Kshivets
No abstract text is available yet for this article.
November 2016: Journal of Thoracic Oncology
https://www.readbyqxmd.com/read/27936179/co2-induced-atp-dependent-release-of-acetylcholine-on-the-ventral-surface-of-the-medulla-oblongata
#15
Robert T R Huckstepp, Enrique Llaudet, Alexander V Gourine
Complex mechanisms that detect changes in brainstem parenchymal PCO2/[H+] and trigger adaptive changes in lung ventilation are responsible for central respiratory CO2 chemosensitivity. Previous studies of chemosensory signalling pathways suggest that at the level of the ventral surface of the medulla oblongata (VMS), CO2-induced changes in ventilation are (at least in part) mediated by the release and actions of ATP and/or acetylcholine (ACh). Here we performed simultaneous real-time biosensor recordings of CO2-induced ATP and ACh release from the VMS in vivo and in vitro, to test the hypothesis that central respiratory CO2 chemosensory transduction involves simultaneous recruitment of purinergic and cholinergic signalling pathways...
2016: PloS One
https://www.readbyqxmd.com/read/27925846/characteristics-sources-and-cytotoxicity-of-atmospheric-polycyclic-aromatic-hydrocarbons-in-urban-roadside-areas-of-hangzhou-china
#16
Hongzhen Bai, Hongjian Zhang
The primary objective of this study is to understand the profiles, sources and cytotoxic effects of atmospheric polycyclic aromatic hydrocarbons (PAHs), which are closely related to urban air contamination and public health, in urban roadside environments. On-road sampling campaigns were conducted from 2014 to 2015 at three urban road sites in Hangzhou, China. Sixteen gaseous and particulate matter (PM) 2.5-bound PAHs were identified and quantified using gas chromatography-mass spectrometry (GC-MS). The total PAH concentrations at the three sites ranged from 750 to1142 ng/m(3) and 1050 to 1483 ng/m(3) in summer and winter, respectively...
December 7, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27925231/experimental-approach-to-visualize-flow-in-a-stacked-hollow-fiber-bundle-of-an-artificial-lung-with-particle-image-velocimetry
#17
Andreas Kaesler, Peter C Schlanstein, Felix Hesselmann, Martin Büsen, Michael Klaas, Dorothee Roggenkamp, Thomas Schmitz-Rode, Ulrich Steinseifer, Jutta Arens
Flow distribution is key in artificial lungs, as it directly influences gas exchange performance as well as clot forming and blood damaging potential. The current state of computational fluid dynamics (CFD) in artificial lungs can only give insight on a macroscopic level due to model simplification applied to the fiber bundle. Based on our recent work on wound fiber bundles, we applied particle image velocimetry (PIV) to the model of an artificial lung prototype intended for neonatal use to visualize flow distribution in a stacked fiber bundle configuration to (i) evaluate the feasibility of PIV for artificial lungs, (ii) validate CFD in the fiber bundle of artificial lungs, and (iii) give a suggestion how to incorporate microscopic aspects into mainly macroscopic CFD studies...
December 7, 2016: Artificial Organs
https://www.readbyqxmd.com/read/27916175/state-of-the-art-bridging-to-lung-transplantation-using-artificial-organ-support-technologies
#18
Keshava Rajagopal, Marius M Hoeper
Lung transplantation increasingly is being performed in recipients of higher risk and acuity. A subset of these patients has severely abnormal gas exchange and/or right ventricular dysfunction, such that artificial organ support strategies are required to bridge patients to lung transplantation. We review the rationales and currently used and potential strategies for bridging to lung transplantation and characterize bridging outcomes. Based on physiologic reasoning and a study of the existing literature, we provide a working strategy for bridging to lung transplantation...
December 2016: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/27897029/a-method-for-evaluating-the-performance-of-computer-aided-detection-of-pulmonary-nodules-in-lung-cancer-ct-screening-detection-limit-for-nodule-size-and-density
#19
Hajime Kobayashi, Masaki Ohkubo, Akihiro Narita, Janaka C Marasinghe, Kohei Murao, Toru Matsumoto, Shusuke Sone, Shinichi Wada
OBJECTIVE: We propose the application of virtual nodules to evaluate the performance of computer-aided detection (CAD) of lung nodules in cancer screening using low-dose CT. METHODS: The virtual nodules were generated based on the spatial resolution measured for a CT system used in an institution providing cancer screening and were fused into clinical lung images obtained at that institution, allowing site specificity. First, we validated virtual nodules as an alternative to artificial nodules inserted into a phantom...
January 3, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/27894031/artificial-placenta-analysis-of-recent-progress
#20
REVIEW
Stephen D Bird
The artificial placenta (AP) has for many decades captured the imagination of scientists and authors with popular fiction including The Matrix and Aldous Huxley's "Brave New World", depicting a human surviving ex-utero in an artificial uterine environment (AUE). For scientists this has fascinated as a way forward for extremely preterm infants (EPIs) born less than 28 weeks of gestation. Early successes with mechanical ventilation (MV) for infants born above 28 weeks of gestation meant that AP research lost momentum...
January 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
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