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Oxygen saturation

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https://www.readbyqxmd.com/read/28453538/variation-of-iron-redox-kinetics-and-its-relation-with-molecular-composition-of-standard-humic-substances-at-circumneutral-ph
#1
Ying Ping Lee, Manabu Fujii, Tetsuro Kikuchi, Koumei Terao, Chihiro Yoshimura
Oxidation and reduction kinetics of iron (Fe) and proportion of steady-state Fe(II) concentration relative to total dissolved Fe (steady-state Fe(II) fraction) were investigated in the presence of various types of standard humic substances (HS) with particular emphasis on the photochemical and thermal reduction of Fe(III) and oxidation of Fe(II) by dissolved oxygen (O2) and hydrogen peroxide (H2O2) at circumneutral pH (pH 7-8). Rates of Fe(III) reduction were spectrophotometrically determined by a ferrozine method under the simulated sunlight and dark conditions, whereas rates of Fe(II) oxidation were examined in air-saturated solution using luminol chemiluminescence technique...
2017: PloS One
https://www.readbyqxmd.com/read/28447930/a-novel-and-simple-method-for-tracheal-intubation-in-a-swine-model-preparing-for-the-era-of-xenotransplantation
#2
Hyub Huh, Hyong Hwan Lim, Ji Yeong Kim, Hye Won Shin, Hae Ja Lim, Suk Min Yoon, Seung Zhoo Yoon, Hye Won Lee
OBJECTIVES: Organ transplant in humans is an established therapy for a variety of end-stage organ diseases. However, due to organ shortages and lack of donors, the need for xenotransplant has gradually increased. Xenotransplantation has great potential to solve many of the problems facing organ transplantation. Pigs are being developed as xenogeneic organ donors for use in humans. In this study, we propose a novel and simple method for tracheal intubation in a swine model using neuromuscular blocking agents and laryngeal mask airway...
April 27, 2017: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/28446622/cortical-venous-redness-represents-tissue-circulation-status-in-patients-with-moyamoya-disease
#3
Toshio Machida, Yoshinori Higuchi, Shigeki Nakano, Satoshi Ishige, Atsushi Fujikawa, Yuichi Akaogi, Junichiro Shimada, Yoichi Yoshida, Sigenori Maru, Junichi Ono
BACKGROUND AND PURPOSE: Venous oxygen saturation (SO2) is measured in medical fields to assess tissue circulation insufficiency. This study aimed to elucidate the use of a cortical venous redness measurement to evaluate hemodynamic changes during revascularization surgery for patients with moyamoya disease. METHODS: In this retrospective case-series analysis, we first quantitatively measured and correlated SO2 and R intensity of 24-bit color digital red-green-blue pictures of blood samples from 3 volunteers...
April 26, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28445640/a-highly-active-and-stable-fe-n-c-catalyst-for-oxygen-depolarized-cathode-applications
#4
Jingkun Li, Qingying Jia, Shraboni Ghoshal, Wentao Liang, Sanjeev Mukerjee
Anion immunity towards oxygen reduction reaction (ORR) has tremendous implications in electrocatalysis with applications for fuel cells, metal-air batteries, and oxygen depolarized cathodes (ODCs) in anodic evolution of chlorine. The necessity for exploring ORR catalysts with immunity to anion adsorption is particularly significant considering that platinum group metal (PGM) catalysts are costly and highly vulnerable to impurities such as halides. Herein, we report a metal organic framework (MOF) derived Fe-N-C catalyst that exhibits a dramatically improved half-wave potential of 240 mV compared to the state-of-the-art RhxSy/C catalyst in a rotating disk electrode in the presence of Cl-...
April 26, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28445278/analysis-of-treatment-of-large-abdominal-malignancies-in-children-complicated-with-abdominal-compartment-syndrome-report-of-six-cases
#5
Zeng Le-Xiang, Wu Yao-Hao, Li Na, Qiu Rong-Lin, Zhou Jia-Jia, Jiang Wen-Li, Zhang Jie, Deng Xiao-Geng
To explore effective treatment of large abdominal malignancies in children complicated with abdominal compartment syndrome (ACS).Six children with large abdominal malignancies complicated with ACS were admitted to our department from January 2013 to January 2016, and the changes in their breathing, heart rate, oxygen saturation, abdominal circumference, bladder pressure, and urine output, as well as the treatment measures and outcomes, were retrospectively analyzed.The 6 children included 1 child with bilateral nephroblastoma, 1 child with abdominal alveolar rhabdomyosarcoma, 1 child with right ovarian malignant teratoma complicated with abdominal glioma, 1 child with abdominal malignant teratoma, 1 child with right nephroblastoma, and 1 child with left adrenal gland neuroblastoma...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28445110/normobaric-hypoxia-increases-the-growth-hormone-response-to-maximal-resistance-exercise-in-trained-men
#6
Dean Filopoulos, Stuart J Cormack, Douglas G Whyte
This study examined the effect of hypoxia on growth hormone (GH) release during an acute bout of high-intensity, low-volume resistance exercise. Using a single-blinded, randomised crossover design, 16 resistance-trained males completed two resistance exercise sessions in normobaric hypoxia (HYP; inspiratory oxygen fraction, (FiO2) 0.12, arterial oxygen saturation (SpO2) 82 ± 2%) and normoxia (NOR; FiO2 0.21, SpO2 98 ± 0%). Each session consisted of five sets of three repetitions of 45° leg press and bench press at 85% of one repetition maximum...
April 26, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28444078/expiratory-rib-cage-compression-in-mechanically-ventilated-adults-systematic-review-with-meta-analysis
#7
Lúcia Faria Borges, Mateus Sasso Saraiva, Marcos Ariel Sasso Saraiva, Fabrício Edler Macagnan, Adriana Kessler
Objective: To review the literature on the effects of expiratory rib cage compression on ventilatory mechanics, airway clearance, and oxygen and hemodynamic indices in mechanically ventilated adults. Methods: Systematic review with meta-analysis of randomized clinical trials in the databases MEDLINE (via PubMed), EMBASE, Cochrane CENTRAL, PEDro, and LILACS. Studies on adult patients hospitalized in intensive care units and under mechanical ventilation that analyzed the effects of expiratory rib cage compression with respect to a control group (without expiratory rib cage compression) and evaluated the outcomes static and dynamic compliance, sputum volume, systolic blood pressure, diastolic blood pressure, mean arterial pressure, heart rate, peripheral oxygen saturation, and ratio of arterial oxygen partial pressure to fraction of inspired oxygen were included...
January 2017: Revista Brasileira de Terapia Intensiva
https://www.readbyqxmd.com/read/28444068/acute-bag-valve-breathing-maneuvers-plus-manual-chest-compression-is-safe-during-stable-septic-shock-a-randomized-clinical-trial
#8
Clarissa Netto Blattner, Rafael Saldanha Dos Santos, Fernando Suparregui Dias, Alexandre Simões Dias, Régis Gemerasca Mestriner, Silvia Regina Rios Vieira
Objective: To evaluate the effects of bag-valve breathing maneuvers combined with standard manual chest compression techniques on safety, hemodynamics and oxygenation in stable septic shock patients. Design: A parallel, assessor-blinded, randomized trial of two groups. A computer-generated list of random numbers was prepared by an independent researcher to allocate treatments. Setting: The Intensive Care Unit at Hospital São Lucas, Pontifícia Universidade Católica do Rio Grande do Sul...
January 2017: Revista Brasileira de Terapia Intensiva
https://www.readbyqxmd.com/read/28443988/efficacy-of-minimally-invasive-tonsil-surgery-for-treatment-of-obstructive-sleep-apnea-hypopnea-syndrome-in-children
#9
X-Q Zhang, H Wang, J Zhou, P Zeng, Y Zhao, Y Zhang, C Liu, L-Q Jiang, Y-J Lan
This study aimed to investigate the efficacy of minimally invasive tonsil surgery for the treatment of obstructive sleep apnea-hypopnea syndrome (OSAHS) in children. Tonsil ablation or turbinate reduction was performed on 49 pediatric patients with OSAHS by minimally invasive tonsil surgery. In order to evaluate the efficacy of surgery, a comparison was conducted between pre-operation and post-operation data in terms of the symptoms, signs and polysomnography test. Total effectiveness rate of the surgery was 83...
April 20, 2017: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/28443926/defect-induced-ferromagnetism-in-mgo-and-its-exceptional-enhancement-upon-thermal-annealing-a-case-of-transformation-of-various-defect-states
#10
Nimai Pathak, Santosh Kumar Gupta, C L Prajapat, S K Sharma, P S Ghosh, Buddhadev Kanrar, P K Pujari, R M Kadam
MgO particles of few micron size are synthesized through a sol-gel method at different annealing temperatures such as 600 °C (MgO-600), 800 °C (MgO-800) and 1000 °C (MgO-1000). EDX and ICP-AES studies confirmed a near total purity of the sample with respect to paramagnetic metal ion impurities. Magnetic measurements showed a low temperature weak ferromagnetic ordering with a TC (Curie temperature) around 65 K (±5 K). Unexpectedly, the saturation magnetization (Ms) was found to be increased with increasing annealing temperature during synthesis...
April 26, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28442954/evaluation-of-efficacy-of-dexmedetomidine-versus-propofol-for-sedation-in-children-undergoing-magnetic-resonance-imaging
#11
Kirti Kamal, Unnati Asthana, Teena Bansal, Jagdish Dureja, Geeta Ahlawat, Saloni Kapoor
BACKGROUND: A deep level of sedation is required for magnetic resonance imaging (MRI) in children to ensure optimum image quality. The present study was conducted to evaluate the efficacy and safety of dexmedetomidine versus propofol for sedation in children undergoing MRI. MATERIALS AND METHODS: A total of sixty children aged 2-10 years, having physical status 1 or 2 according to the American Society of Anesthesiologists, undergoing MRI were included in the study...
April 2017: Saudi Journal of Anaesthesia
https://www.readbyqxmd.com/read/28442070/comparing-airways-clearance-techniques-in-chronic-obstructive-pulmonary-disease-and-bronchiectasis-positive-expiratory-pressure-or-temporary-positive-expiratory-pressure-a-retrospective-study
#12
Francesco D'Abrosca, Barbara Garabelli, Gloria Savio, Agnese Barison, Lorenzo Appendini, Luis V F Oliveira, Paola Baiardi, Bruno Balbi
BACKGROUND: Airway clearance techniques include positive expiratory pressure, commonly used in our clinical practice, and a recently introduced temporary positive expiratory pressure device called UNIKO(®). It is unclear which one provides the best benefit to patients. OBJECTIVES: The aim of this observational 4-year study was to retrospectively compare the efficacy of and specific indications for temporary positive expiratory pressure compared to positive expiratory pressure in a standard rehabilitation program...
January 2017: Brazilian Journal of Physical Therapy
https://www.readbyqxmd.com/read/28440636/probing-and-comparing-the-photobromination-and-photoiodination-of-dissolved-organic-matter-by-using-ultrahigh-resolution-mass-spectrometry
#13
Zhineng Hao, Yongguang Yin, Dong Cao, Jing-Fu Liu
Photochemical halogenation of dissolved organic matter (DOM) may represent an important abiotic source of natural organobromine compounds (OBCs) and natural organoiodine compounds (OICs) within surface waters. Here we report the significantly enhanced formation of OBCs and OICs by photohalogenating DOM in freshwater and seawater, as well as the noticeable difference in distribution and composition pattern of newly formed OBCs and OICs. By using the negative ion electrospray ionization coupled with Fourier transform ion cyclotron resonance mass spectrometry, numerous OBCs and OICs were identified during the photo halogenation processes in sunlit waters...
April 25, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28439886/lifebox-pulse-oximeter-implementation-in-malawi-evaluation-of-educational-outcomes-and-impact-on-oxygen-desaturation-episodes-during-anaesthesia
#14
V Albert, S Mndolo, E M Harrison, E O'Sullivan, I H Wilson, I A Walker
Pulse oximetry is an essential monitor for safe anaesthesia but is often not available in low-income countries. The aim of this study was to determine whether the introduction of pulse oximetry with training was feasible and could reduce the incidence of oxygen desaturation during anaesthesia in a low-income country. Pulse oximeters were donated, with training, to 83 non-physician anaesthetists in Malawi. Knowledge was tested immediately before and after training and at follow-up. Providers were asked to record the lowest peripheral oxygen saturation (SpO2 ) for the first 100 cases anaesthetised after training...
April 24, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28438512/physical-performance-quality-of-life-and-sexual-satisfaction-evaluation-in-adults-with-cystic-fibrosis-an-unexplored-correlation
#15
K C A Aguiar, F A L Marson, C C S Gomez, M C Pereira, I A Paschoal, A F Ribeiro, J D Ribeiro
OBJECTIVE: Quality of life (QOL), sexual satisfaction (SS) and physical performance have been assessed in the management of numerous chronic diseases. METHODS: In this study, the following tests and surveys were applied: (i) QOL questionnaire [Cystic Fibrosis Questionnaire (CFQ)]; (ii) SS questionnaire (SSQ) [female sexual quotient (FSQ) and male sexual quotient (MSQ)]; (iii) 6-minute walk test (6MWT). Spearman's correlation was used for comparison between the data; the Mann-Whitney test was applied to analyze the difference between genders...
April 21, 2017: Revista Portuguesa de Pneumologia
https://www.readbyqxmd.com/read/28434429/association-between-sleep-disordered-breathing-and-nighttime-driving-performance-in-mild-cognitive-impairment
#16
Nathan Cross, Zoe Terpening, Shantel L Duffy, Simon J G Lewis, Ron Grunstein, Keith Wong, Sharon L Naismith
OBJECTIVES: The effect of sleep disordered breathing (SDB) on driving performance in older adults has not been extensively investigated, especially in those with mild cognitive impairment (MCI). The aim of this study was to examine the relationship between severity measures of SDB and a simulated driving task in older adults with and without MCI. METHODS: Nineteen older adults (age ≥50) meeting criteria for MCI and 23 age-matched cognitively intact controls underwent neuropsychological assessment and a driving simulator task in the evening before a diagnostic sleep study...
April 24, 2017: Journal of the International Neuropsychological Society: JINS
https://www.readbyqxmd.com/read/28432155/interactive-effects-of-oxygen-carbon-dioxide-and-flow-on-photosynthesis-and-respiration-in-the-scleractinian-coral-galaxea-fascicularis
#17
Ronald Osinga, Marlous Derksen-Hooijberg, Tim Wijgerde, Johan A J Verreth
Rates of dark respiration and net photosynthesis were measured on six replicate clonal fragments of the stony coral Galaxea fascicularis (Linnaeus 1767), which were incubated under twelve different combinations of dissolved oxygen (20%, 100% and 150% saturation), dissolved carbon dioxide (9.5 and 19.1 μmol L(-1)) and water flow (1-1.6 cm s(-1) versus 4-13 cm s(-1)) in a repeated measures design. Dark respiration was enhanced by increased flow and increased oxygen saturation in an interactive way, which relates to improved oxygen influx into the coral tissue...
April 21, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28431821/near-infrared-spectroscopy-as-a-predictor-for-shunt-requirement-during-carotid-endarterectomy
#18
M Jonsson, D Lindström, A Wanhainen, K Djavani Gidlund, P Gillgren
OBJECTIVE/BACKGROUND: Near infrared spectroscopy (NIRS) continuously monitors regional cerebral oxygenation (rSO2) in the frontal lobes. This method may be used in patients during carotid endarterectomy to indicate the need for shunting. The aim of the study was to evaluate the value of NIRS in determining the need for selective shunting during CEA. A secondary aim was to compare NIRS with stump pressure. METHODS: Between January 2013 and October 2016, 185 patients from two vascular units, undergoing CEA under local anaesthesia were prospectively included...
April 18, 2017: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28430913/prediction-of-adverse-events-after-catheter-based-procedures-in-adolescents-and-adults-with-congenital-heart-disease-in-the-impact-registry
#19
Ada C Stefanescu Schmidt, Aimee Armstrong, Kevin F Kennedy, David Nykanen, Jamil Aboulhosn, Ami B Bhatt
Aims: We sought to identify factors associated with major adverse events (MAE) after cardiac catheterization in adolescents and adults with congenital heart disease (CHD), and create the first model to individualize risk discussions in this growing population. Methods and results: Improving Pediatric and Adult Congenital Treatment (IMPACT), a National Cardiovascular Data Registry, contains congenital catheterization data from over 87 hospitals in the United States...
April 18, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28430880/cerebral-abscess-associated-with-odontogenic-bacteremias-hypoxemia-and-iron-loading-in-immunocompetent-patients-with-right-to-left-shunting-through-pulmonary-arteriovenous-malformations
#20
E J Boother, S Brownlow, H C Tighe, K B Bamford, J E Jackson, C L Shovlin
Background: Cerebral abscess is a recognised complication of pulmonary arteriovenous malformations (PAVMs) that allow systemic venous blood to bypass the pulmonary capillary bed through anatomic right-to-left shunts. Broader implications and mechanisms remain poorly explored. Methods: Between June 2005 and December 2016, at a single institution, 445 consecutive adult patients with CT-scan confirmed PAVMs (including 403 (90.5%) with hereditary haemorrhagic telangiectasia) were recruited to a prospective series...
April 19, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
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