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https://www.readbyqxmd.com/read/29350784/novel-cardiovascular-magnetic-resonance-cmr-oxygenation-approaches-in-understanding-pathophysiology-of-cardiac-diseases
#1
Karthigesh Sree Raman, Gaetano Nucifora, Joseph B Selvanayagam
Cardiovascular Magnetic Resonance Imaging (CMR) permits accurate phenotyping of many cardiac diseases. CMR's inherent advantages are its non-invasive nature, lack of ionizing radiation and high accuracy and reproducibility. Furthermore, it is able to assess many aspects of cardiac anatomy, structure and function. Specifically, it can characterize myocardial tissue, myocardial function, myocardial mass, myocardial blood flow/perfusion, irreversible and reversible injury, all with a high degree of accuracy and reproducibility...
January 19, 2018: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29350596/enhancement-of-antitumor-activity-by-using-5-ala-mediated-sonodynamic-therapy-to-induce-apoptosis-in-malignant-gliomas-significance-of-high-intensity-focused-ultrasound-on-5-ala-sdt-in-a-mouse-glioma-model
#2
Satoshi Suehiro, Takanori Ohnishi, Daisuke Yamashita, Shohei Kohno, Akihiro Inoue, Masahiro Nishikawa, Shiro Ohue, Junya Tanaka, Takeharu Kunieda
OBJECTIVE High invasiveness of malignant gliomas frequently causes early local recurrence of the tumor, resulting in extremely poor outcome. To control such recurrence, novel therapies targeted toward infiltrating glioma cells around the tumor border are required. Here, the authors investigated the antitumor activity of sonodynamic therapy (SDT) combined with a sonosensitizer, 5-aminolevulinic acid (5-ALA), on malignant gliomas to explore the possibility for clinical use of 5-ALA-mediated SDT (5-ALA-SDT). METHODS In vitro cytotoxicity of 5-ALA-SDT was evaluated in U87 and U251 glioma cells and in U251Oct-3/4 glioma stemlike cells...
January 19, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29345708/triphenylstannyl-arylimino-methyl-benzoates-with-selective-potency-that-induce-g1-and-g2-m-cell-cycle-arrest-and-trigger-apoptosis-via-ros-in-human-cervical-cancer-cells
#3
Tushar S Basu Baul, Imliwati Longkumer, Andrew Duthie, Priya Singh, Biplob Koch, M Fátima C Guedes da Silva
Metal complexes with organelle specificity and potent but selective cytotoxicity are highly desirable. A novel series of triphenylstannyl 4-((arylimino)methyl)benzoates (2-8) were obtained by the reactions of triphenylstannyl 4-formylbenzoate [Ph3Sn(L1)] 1 with primary aromatic amines. Two representative compounds (10, 11) were also synthesized by reacting aqua-triphenylstannyl 2-formylbenzoate [Ph3Sn(L9)(H2O)] (9) with aniline and p-fluoroaniline, respectively. These compounds were characterized by elemental analysis, IR and 1H, 13C and 119Sn NMR spectroscopy, as well as single-crystal X-ray diffraction for compounds 5, 7-11 and three pro-ligands...
January 18, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29343048/physiology-intervention-and-outcome-three-critical-questions-about-cerebral-tissue-oxygen-saturation-monitoring
#4
Lingzhong Meng, Shaun E Gruenbaum, Feng Dai, Tianlong Wang
The balance between cerebral tissue oxygen consumption and supply can be continuously assessed by cerebral tissue oxygen saturation (SctO2) monitor. A construct consisting of three sequential questions, targeting the physiology monitored, the intervention implemented, and the outcomes affected, is proposed to critically appraise this monitor. The impact of the SctO2- guided care on patient outcome was examined through a systematic literature search and meta- analysis. We concluded that the physiology monitored by SctO2 is robust and dynamic, fragile (prone to derangement), and adversely consequential when deranged...
January 17, 2018: Minerva Anestesiologica
https://www.readbyqxmd.com/read/29343034/-a-study-on-the-effects-and-safety-of-sequential-humidified-high-flow-nasal-cannula-oxygenation-therapy-on-the-copd-patients-after-extubation
#5
J C Zhang, F X Wu, L L Meng, C Y Zeng, Y Q Lu
Objective: To investigate and compare the effect and safety of nasal high-flow oxygen therapy (HFNCO) and noninvasive ventilation (NIV) therapy after extubation in patients with chronic obstructive pulmonary disease (COPD). Methods: All COPD patients subjected to mechanical ventilation in the Emergency Intensive Unit of the First Affiliated Hospital of Zhejiang University during January 2015 to June 2016 were included in the study. The patients were divided into two groups after extubation and HFNCO and NIV were adopted on each group respectively...
January 9, 2018: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29341582/in-plane-channel-structured-catalyst-layer-for-polymer-electrolyte-membrane-fuel-cells
#6
Dong-Hyun Lee, Wonhee Jo, Seongmin Yuk, Jaeho Choi, Sungyu Choi, Gisu Doo, Dong Wook Lee, Hee-Tak Kim
In this study, we present a novel catalyst layer (CL) with in-plane flow channels to enhance the mass transports in polymer electrolyte membrane fuel cells (PEMFCs). The CL with in-plane channels on its surface is fabricated by coating a CL slurry onto a surface-treated substrate with the inverse line pattern and transferring the dried CL from the substrate to a membrane. The membrane electrode assembly (MEA) with the in-plane channel-patterned CL (IC-CL) has superior power performances in high current densities compared with an un-patterned, flat CL (FCL), demonstrating a significant enhancement of the mass transport property by the in-plane channels carved in the CL...
January 17, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29340533/more-than-two-decades-after-the-introduction-of-limnoperna-fortunei-dunker-1857-in-la-plata-basin
#7
M A Pessotto, M G Nogueira
The golden mussel, Limnoperna fortunei, is an Asian freshwater bivalve introduced in South America in the beginning of the 1990's, probably through ballast water releases in La Plata River estuary. It dispersed north through Paraná, Uruguay and Paraguay Rivers. The study evaluated the macroscale (18° to 34° S; 45° to 60° W) distribution of L. fortunei (larval stages) in the main rivers and reservoirs of La Plata Basin. Samplings were performed through 68 µm vertical plankton net hauls. Limnological variables were simultaneously determined...
January 15, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/29333956/high-efficiency-treatment-of-pta-wastewater-using-a-biogas-jet-assisted-anaerobic-fluidized-bed-reactor
#8
Wei Zhang, Yangyang Feng, Yingwen Chen, Peiwen Li, Shemin Zhu, Shubao Shen
In this paper, a new type of biogas jet assisted anaerobic fluidized bed reactor loaded with a polypropylene (PP) carrier, has been proposed. There was a clear improvement in the fluidized state due to the biogas assisted input when the gas/water ratio was set at 1:3 with a suitable carrier loading of 60%. When the circulating water flow is 30 L/min assisted with biogas 10 L/min, the mixing time shortens from 26 s to 18 s. The performance of anaerobic biodegradation on wastewater treatment was improved largely...
January 15, 2018: Environmental Technology
https://www.readbyqxmd.com/read/29333859/chromatographic-separation-and-visual-detection-on-wicking-microfluidic-devices-quantitation-of-cu2-in-surface-ground-and-drinking-water
#9
Gayan C Bandara, Christopher Heist, Vincent T Remcho
Copper is widely applied in industrial and technological applications, and is an essential micro nutrient for humans and animals. However, exposure to high environmental levels of copper, especially through drinking water, can lead to copper toxicity, resulting in severe acute and chronic health effects. Therefore, regular monitoring of aqueous copper ions has become necessary as recent anthropogenic activities have led to elevated environmental concentrations of copper. On-site monitoring processes require an inexpensive, simple, and portable analytical approach capable of generating reliable qualitative and quantitative data efficiently...
January 15, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29332344/in-vitro-antitumor-activity-of-guttiferone-a-in-human-breast-cancer-cells-is-mediated-via-apoptosis-mitochondrial-mediated-oxidative-stress-and-reactive-oxygen-species-production
#10
Hai-Ming Wu, Yu-Mei Li
PURPOSE: Breast cancer is the second most frequently diagnosed cancer and is considered as the main cause of cancer related death in females. It is estimated that about one-third of women with breast cancer develop metastases and eventually die of this disease. The main treatment options for breast cancer include surgical interventions followed by chemotherapy, hormonotherapy or radiation. However, the side effects associated with the treatment of breast cancer negatively affects the quality of patient's life...
November 2017: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
https://www.readbyqxmd.com/read/29331328/pilot-clinical-trial-of-high-flow-oxygen-therapy-in-children-with-asthma-in-the-emergency-service
#11
Yolanda Ballestero, Jimena De Pedro, Nancy Portillo, Otilia Martinez-Mugica, Eunate Arana-Arri, Javier Benito
OBJECTIVES: To assess the efficacy of high-flow nasal cannula (HFNC) oxygen therapy and safety in children with asthma and moderate respiratory failure in the emergency department (ED). STUDY DESIGN: This was a prospective randomized pilot trial of children (aged 1-14 years) presenting to a tertiary academic pediatric ED with moderate-to-severe asthma exacerbations between September 2012 and December 2015. Patients with a pulmonary score (PS) ≥6 or oxygen saturation <94% with a face mask despite initial treatment (salbutamol/ipratropium bromide and corticosteroids) were randomized to HFNC or to conventional oxygen therapy...
January 11, 2018: Journal of Pediatrics
https://www.readbyqxmd.com/read/29326765/pneumocephalus-following-combined-spinal-epidural-anaesthesia-for-total-knee-arthroplasty-a-case-report
#12
Y W Chew, V K Suppan, S R Ashutosh, M M Tew, J H Jimmy-Tan
The authors describe a case of pneumocephalus following epidural anaesthesia for total knee arthroplasty. Multiple attempts in locating the epidural space for the anaesthesia and the use of loss of resistance to air (LORA) technique were identified as the source of air entry. Supportive management was given including high flow oxygenation therapy and spontaneous reabsorption of air was noted five days after surgery. The presence of pneumocephalus should be kept in mind if patient develops neurological complications postoperatively following epidural anaesthesia...
November 2017: Malaysian Orthopaedic Journal
https://www.readbyqxmd.com/read/29322482/variation-in-cell-size-of-the-diatom-coscinodiscus-granii-influences-photosynthetic-performance-and-growth
#13
Dong Yan, John Beardall, Kunshan Gao
Cell size has implications for the package effect in photon absorption as well as for metabolic scaling of metabolism. In this study, we have avoided species-related differences by using isolates of the marine planktonic diatom Coscinodiscus granii with cells of different sizes and grown at different light intensities to investigate their energy allocation strategies. To make full use of incident light, several fold variations in cellular chlorophyll a content were employed across cell size. This modulation of pigment-related light absorbance was deemed effective as similar light absorbing capacities were found in all treatments...
January 10, 2018: Photosynthesis Research
https://www.readbyqxmd.com/read/29320927/benefits-of-using-high-volume-low-pressure-tracheal-tube-in-children-undergoing-congenital-cardiac-surgery-evidence-from-a-prospective-randomized-study
#14
Rakesh Chand, Saibal Roy Chowdhury, Emmanuel Rupert, Chandan Kumar Mandal, Pradeep Narayan
BACKGROUND: In the past 2 decades, usage of high-volume-low-pressure microcuffed tracheal tubes in smaller children has increased. However, there is paucity of evidence of its usage in smaller children undergoing congenital cardiac surgery. The aim of this study was to assess if microcuff endotracheal tubes in neonates and younger children undergoing congenital cardiac surgery is associated with better outcomes than uncuffed tubes. METHODS: We carried out this single-center, prospective, randomized study between June and November 2016...
January 1, 2018: Seminars in Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/29319396/detrimental-effect-of-systemic-vascular-risk-factors-on-brain-hemodynamic-function-assessed-with-mri
#15
Kevin S King, Min Sheng, Peiying Liu, Christopher D Maroules, Craig D Rubin, Ron M Peshock, Roderick W McColl, Hanzhang Lu
Background and purpose Vascular risk factors have been associated with decreased cerebral blood flow (CBF) but this is etiologically nonspecific and may result from vascular insufficiency or a response to decreased brain metabolic activity. We apply new MRI techniques to measure oxygen extraction fraction (OEF) and cerebral metabolic rate of oxygen consumption (CMRO2), hypothesizing that decreased CBF related to these vascular risk factors will be associated with increased OEF, confirming a primary vascular insufficiency...
January 1, 2018: Neuroradiology Journal
https://www.readbyqxmd.com/read/29315036/high-flow-nasal-oxygen-therapy
#16
Keir Pickard, Steve Harris
No abstract text is available yet for this article.
January 2, 2018: British Journal of Hospital Medicine
https://www.readbyqxmd.com/read/29314741/a-bench-study-of-inhaled-nitric-oxide-delivery-during-high-frequency-percussive-ventilation
#17
Richard D Branson, Jeff Griebel, Dario Rodriquez
BACKGROUND: Safe and effective delivery of inhaled nitric oxide (INO) requires the appropriate interface of ventilator and INO delivery device. METHODS: We compared INO delivery using four configurations with the Transport Sinusoidal Bronchotron® and INOmax DSIR Plus® in a lung model. Ventilator settings and lung model values were held constant. Delivered NO, NO2 , and inspired oxygen (FIO2 ) were measured. The mean difference between set and measured NO was calculated and compared using ANOVA...
January 4, 2018: Pediatric Pulmonology
https://www.readbyqxmd.com/read/29313906/respiratory-complications-of-anaesthesia
#18
REVIEW
G H Mills
Postoperative pulmonary complications are a major determinant of outcome for patients and consume huge resources within hospital, particularly in critical care. Prediction and anticipation of postoperative pulmonary complications are vital for patient selection and, in some cases, for informed patient consent. Being able to assess the likelihood of postoperative pulmonary complications also allows research into methods to reduce them by allowing allocation of patients to the appropriate arms of research trials...
January 2018: Anaesthesia
https://www.readbyqxmd.com/read/29309766/heme-oxygnease-1-induction-by-methylene-blue-protects-raw264-7-cells-from-hydrogen-peroxide-induced-injury
#19
Xiao-Tong Zhang, Xue-Qiang Sun, Chen Wu, Jun-Liang Chen, Jia-Jia Yuan, Qing-Feng Pang, Zhi-Ping Wang
Althoughmethylene blue (MB) has showed strong antioxidant effect, its effect related with heme oxygenase-1(HO-1) is still unclear. Thus, we investigated the effects of MB on HO-1 protein content and enzyme activity, and its protective effect against hydrogen peroxide (H2O2)- induced oxidative damage in RAW264.7 macrophage. The cellviability and the release of lactate dehydrogenase of RAW264.7 were determined. The mitochondrial functions were valuated through these indexes: content of adenosine triphosphate, superoxide dismutase, concentration of reactive oxygen species and mitochondrial membrane potential...
January 5, 2018: Biochemical Pharmacology
https://www.readbyqxmd.com/read/29307496/dithiothreitol-supplementation-mitigates-hepatic-and-renal-injury-in-bile-duct-ligated-mice-potential-application-in-the-treatment-of-cholestasis-associated-complications
#20
Reza Heidari, Vahid Ghanbarinejad, Hamidreza Mohammadi, Asrin Ahmadi, Athena Esfandiari, Negar Azarpira, Hossein Niknahad
Cholestasis is a disorder characterized by impaired bile flow and accumulation of cytotoxic bile acids in the liver. On the other hand, oxidative stress and its deleterious consequences seem to have a significant role in cholestasis-induced organ injury. Hence, antioxidants and thiol-reducing agents could have potential protective effect against this complication. The current investigation was designed to evaluate the effect of dithiothreitol (DTT) as a safe and clinically applicable thiol-reductant in cholestatic animals...
January 4, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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