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Oxygen saturation

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https://www.readbyqxmd.com/read/29221302/the-society-for-translational-medicine-clinical-practice-guidelines-for-mechanical-ventilation-management-for-patients-undergoing-lobectomy
#1
REVIEW
Shugeng Gao, Zhongheng Zhang, Alessandro Brunelli, Chang Chen, Chun Chen, Gang Chen, Haiquan Chen, Jin-Shing Chen, Stephen Cassivi, Ying Chai, John B Downs, Wentao Fang, Xiangning Fu, Martínez I Garutti, Jianxing He, Jie He, Jian Hu, Yunchao Huang, Gening Jiang, Hongjing Jiang, Zhongmin Jiang, Danqing Li, Gaofeng Li, Hui Li, Qiang Li, Xiaofei Li, Yin Li, Zhijun Li, Chia-Chuan Liu, Deruo Liu, Lunxu Liu, Yongyi Liu, Haitao Ma, Weimin Mao, Yousheng Mao, Juwei Mou, Calvin Sze Hang Ng, René H Petersen, Guibin Qiao, Gaetano Rocco, Erico Ruffini, Lijie Tan, Qunyou Tan, Tang Tong, Haidong Wang, Qun Wang, Ruwen Wang, Shumin Wang, Deyao Xie, Qi Xue, Tao Xue, Lin Xu, Shidong Xu, Songtao Xu, Tiansheng Yan, Fenglei Yu, Zhentao Yu, Chunfang Zhang, Lanjun Zhang, Tao Zhang, Xun Zhang, Xiaojing Zhao, Xuewei Zhao, Xiuyi Zhi, Qinghua Zhou
Patients undergoing lobectomy are at significantly increased risk of lung injury. One-lung ventilation is the most commonly used technique to maintain ventilation and oxygenation during the operation. It is a challenge to choose an appropriate mechanical ventilation strategy to minimize the lung injury and other adverse clinical outcomes. In order to understand the available evidence, a systematic review was conducted including the following topics: (I) protective ventilation (PV); (II) mode of mechanical ventilation [e...
September 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29221293/distance-saturation-product-of-the-6-minute-walk-test-predicts-mortality-of-patients-with-non-cystic-fibrosis-bronchiectasis
#2
Meng-Heng Hsieh, Yueh-Fu Fang, Fu-Tsai Chung, Chung-Shu Lee, Yu-Chen Chang, Yuan-Zhang Liu, Cheng-Hsien Wu, Horng-Chyuan Lin
Background: Previous surveillance methods to monitor the prognoses of patients with bronchiectasis are too complex for use in daily practice. The 6-minute walk test (6MWT) is a simple exercise test to predict the prognosis of chronic obstructive airway disease and numerous chronic lung diseases, including idiopathic pulmonary fibrosis. No studies have investigated exercise-induced oxygen desaturation (EID) and distance-saturation product (DSP) of 6MWT to predict the prognoses of patients with bronchiectasis...
September 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29220572/martian-redox-chemistry-oxygen-reduction-in-low-temperature-magnesium-perchlorate-brines
#3
Joseph Elliott, Kamonwad Ngamchuea, Christopher Batchelor-McAuley, Richard G Compton
NASA has a mandate to send humans to Mars by 2033. Recent discoveries regarding Mars include the likely presence of low temperature liquid brines on the planet's surface. This work investigates redox chemistry in near saturated aqueous 2.8 M Mg(ClO4)2 at temperatures as low as -34oC. These conditions are comparable to those thought to be found on the Martian surface. In particular electro-reduction of oxygen is studied and the diffusion coefficient and solubility of this important redox species established.
December 8, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29220311/quantifying-the-effects-of-acute-hypoxic-exposure-on-exercise-performance-and-capacity-a-systematic-review-and-meta-regression
#4
Sanjoy K Deb, Daniel R Brown, Lewis A Gough, Christopher P McLellan, Paul A Swinton, S Andy Sparks, Lars R McNaughton
OBJECTIVE: To quantify the effects of acute hypoxic exposure on exercise capacity and performance, which includes continuous and intermittent forms of exercise. DESIGN: A systematic review was conducted with a three-level mixed effects meta-regression. The ratio of means method was used to evaluate main effects and moderators providing practical interpretations with percentage change. DATA SOURCES: A systemic search was performed using three databases (Google scholar, PubMed and SPORTDiscus)...
December 8, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/29219939/psychometric-evaluation-of-the-chinese-respiratory-distress-observation-scale-on-critically-ill-patients-with-cardiopulmonary-diseases
#5
Ya-Hsiang Chan, Hua-Shan Wu, Chih-Ching Yen, Margaret L Campbell
BACKGROUND: Respiratory distress is a common and distressing experience that strikes most critically ill patients with cardiopulmonary diseases. Now, most dyspnea assessment tools rely on patient's self-report. Only one instrument, the Respiratory Distress Observation Scale (RDOS), is valid for assessing respiratory distress when the patient cannot provide a dyspnea self-report. PURPOSE: The aims of this study were to develop the Chinese version of RDOS through two-way translation and examine its reliability and validity...
December 6, 2017: Journal of Nursing Research: JNR
https://www.readbyqxmd.com/read/29219851/oxygen-sensitive-polymeric-nanocapsules-for-optical-dissolved-oxygen-sensors
#6
Zhijuan Sun, Chenxin Cai, Fei Guo, Changhuai Ye, Yingwu Luo, Shuming Ye, Jianchao Luo, Fan Zhu, Chunyue Jiang
Immobilization of the oxygen-sensitive probes (OSPs) in the host matrix greatly impacts the performance and long-term usage of the optical dissolved oxygen sensors. In this work, fluorescent dyes, as the OSPs, were encapsulated with a crosslinked fluorinated polymer shell by interfacial confined reversible addition fragmentation chain transfer miniemulsion polymerization to fabricate oxygen sensitive polymeric nanocapsules. The location of fluorescent dyes and the fluorescent properties of the nanocapsules were fully characterized by fourier transform infrared spectrometer(FTIR), X-ray photoelectron spectrometer(XPS) and fluorescent spectrum...
December 8, 2017: Nanotechnology
https://www.readbyqxmd.com/read/29219229/characterisation-of-cyp102a25-from-b-marmarensis-and-cyp102a26-from-p-halophilus-p450-homologues-of-bm3-with-preference-towards-hydroxylation-of-medium-chain-fatty-acids
#7
Joanne L Porter, Jack Manning, Selina Sabatini, Michele Tavanti, Nicholas J Turner, Sabine L Flitsch
Cytochrome P450 monooxgenases are highly desired biocatalysts due to their ability to catalyse a wide variety of chemically challenging C-H activation reactions. The CYP102A subfamily of enzymes are natural catalytically self-sufficient proteins consisting of a haem and FMN-FAD reductase domain fused in a single component system. They catalyse the oxygenation of saturated and unsaturated fatty acids to produce primarily ω-1, ω-2 and ω-3 hydroxy acids. These monooxygenases have broad applications in biotechnology however, their substrate range is still limited and there is a continued need to add diversity to this class of biocatalysts...
December 8, 2017: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/29218778/examination-of-sacral-tissue-oxygen-saturation-among-immobile-patients
#8
Burcu Ceylan, Ulku Yapucu Gunes, Mehmet Uyar
AIMS AND OBJECTIVES: This research was conducted to explore the effect of immobility on sacral tissue oxygen saturation in patients lying on a supporting surface in supine position. BACKGROUND: Guidelines in regard to preventing pressure ulcers recommend that patients lying on a standard bed should change their positions every two hours and that patients on a supporting surface should change their positions every four hours. But there is no strong evidence that justifies this practice...
December 8, 2017: Journal of Clinical Nursing
https://www.readbyqxmd.com/read/29218580/potential-vulnerability-of-oak-forests-to-climate-change-induced-flooding-effects-of-mild-oxygen-deficiency-on-quercus-robur-and-quercus-petraea-seedling-physiology
#9
Pascale Bourgeade, Mohamed Bourioug, Sandra Macor, Laurence Alaoui-Sossé, Badr Alaoui-Sossé, Lotfi Aleya
Flooding is characterized by saturation of soil pores with water, leading to hypoxic conditions which affect plant root development and metabolism. We investigated the oxygen deficiency tolerance observed in Quercus robur and Quercus petraea and seek to understand whether it can be explained by enhanced efficiency in oxygen use in the roots, as estimated through radial oxygen loss visualization in relation to growth measurements and root apex respiration. The study showed that root growth, under oxygen deficiency conditions, was significantly reduced only in Q...
December 8, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29218511/optical-monitoring-of-cerebral-microcirculation-in-neurointensive-care
#10
Peter Rejmstad, Neda Haj-Hosseini, Oscar Åneman, Karin Wårdell
Continuous optical monitoring of local cerebral microcirculation could benefit neurointensive care patients treated for subarachnoid hemorrhage (SAH). The aim of the study was to evaluate laser Doppler flowmetry (LDF) and diffuse reflectance spectroscopy (DRS) for long-term monitoring of brain microcirculation and oxygen saturation (SO2) in the neurointensive care unit (NICU). A fiber optic probe was designed for intraparenchymal use and connected to LDF and DRS for assessment of the local blood flow (perfusion and tissue reflectance (TLI)) and SO2 in the brain...
December 8, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29217855/effect-of-nasal-oxygen-supplementation-during-apnoea-of-intubation-on-arterial-oxygen-levels-a-prospective-randomised-controlled-trial
#11
Nishant Sahay, Shalini Sharma, Umesh K Bhadani, Chandni Sinha, Amarjeet Kumar, Alok Ranjan
Background and Aims: Apnoeic oxygenation during laryngoscopy has been emphasised in recent recommendations for airway management. We aimed to compare the effect of nasal oxygen supplementation on time for pulse oximeter oxygen saturation (SpO2) to fall from 100% to 92% (desaturation safety time), to assess the arterial oxygen partial pressures (PaO2) with and without nasal oxygen supplementation and the time for SpO2 to recover from 92% to 100% after initiation of ventilation. Methods: This is a prospective randomised placebo-controlled trial involving sixty patients, where nasal oxygen supplementation given at 10 L/min during apnoea of laryngoscopy in one group of patients (Group O2) was compared to no oxygen supplementation in other group (Group NoO2)...
November 2017: Indian Journal of Anaesthesia
https://www.readbyqxmd.com/read/29216947/-effects-of-active-abdominal-compression-decompression-cpr-on-oxygen-metabolism-and-prognosis-in-patients-with-cardiac-arrest
#12
Xin Sha, Sisen Zhang, Hongwei Wang, Yingxin Cen, Wei Song, Jing Li, Lixiang Wang
OBJECTIVE: To analyze the effect of active abdominal compression-decompression cardiopulmonary resuscitation (AACD-CPR) and standard cardiopulmonary resuscitation (STD-CPR) on oxygen metabolism and prognosis of patient with cardiac arrest (CA), and to evaluate the treatment effect of AACD-CPR. METHODS: Patients with CA, CA time less than 30 minutes, and without STD-CPR and AACD-CPR contraindications admitted to the Zhengzhou People's Hospital from October 1st 2015 to May 31st 2017 were enrolled...
December 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/29216230/a-comprehensive-scoring-system-in-correlation-with-perioperative-airway-management-for-neonatal-pierre-robin-sequence
#13
Ning Yin, Lei Fang, Xiaohua Shi, Hongqiang Huang, Li Zhang
PURPOSE: To evaluate a comprehensive scoring system which combines clinical manifestations of Pierre Robin Sequence (PRS) including severity of breathing difficulties, body weight and preoperative Cormack-Lehane grade, for its correlation with perioperative PRS airway management decision. DESIGN: Forty PRS children were retrospectively recruited after surgery. Specialists examined all subjects and scored for clinical manifestations (1´ - 4´), weight gain (1´- 4´), dyspnea scores (1´- 4´), and Cormack-Lehane grade (1´- 4´)...
2017: PloS One
https://www.readbyqxmd.com/read/29215972/accuracy-of-smartphone-based-pulse-oximetry-compared-with-hospital-grade-pulse-oximetry-in-healthy-children
#14
Sarah Tomlinson, Sydney Behrmann, James Cranford, Marisa Louie, Andrew Hashikawa
BACKGROUND: Pulse oximetry, a ubiquitous, noninvasive method to monitor oxygen saturation (SpO2), requires larger, nonportable equipment. Smartphone pulse oximeter applications (apps) provide a portable, cost-effective option, but are untested in children. We hypothesize that smartphone pulse oximetry will not be inferior to standard pulse oximetry measured in healthy children. MATERIALS AND METHODS: Two main types of pulse oximetry apps, a camera-based app (CBA) that uses a phone camera flash and lens and a probe-based app (PBA) that uses an external plug-in probe, were compared with standard pulse oximetry measured in children ages 2-13 years without a respiratory complaint and a triage SpO2 ≥97% seen in a pediatric Emergency Department...
December 7, 2017: Telemedicine Journal and E-health: the Official Journal of the American Telemedicine Association
https://www.readbyqxmd.com/read/29215681/oxygen-saturation-in-the-dental-pulp-of-maxillary-premolars-in-different-age-groups-part-1
#15
Carlos Estrela, Giuliano C Serpa, Ana Helena G Alencar, Kely F Bruno, Fernando B Barletta, Wilson T Felippe, Cyntia R A Estrela, João B Souza
The aim of this study was to determine oxygen saturation levels in the dental pulp of maxillary premolars in different age groups. A total of 120 human maxillary premolars with normal dental pulps were selected covering the following age groups: 20-24, 25-29, 30-34, 35-39 and 40-44 years (n=24 each group). Oxygen saturation was assessed using pulse oximetry. Analysis of variance was used to assess differences in oxygen saturation levels and Tukey's test was used to identify the age groups that differed from each other...
July 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29213059/a-comprehensive-assessment-of-the-genetic-determinants-in-salmonella-typhimurium-for-resistance-to-hydrogen-peroxide-using-proteogenomics
#16
Sardar Karash, Rohana Liyanage, Abdullah Qassab, Jackson O Lay, Young Min Kwon
Salmonella is an intracellular pathogen infecting a wide range of hosts and can survive in macrophages. An essential mechanism used by macrophages to eradicate Salmonella is production of reactive oxygen species. Here, we used proteogenomics to determine the candidate genes and proteins that have a role in resistance of S. Typhimurium to H2O2. For Tn-seq, a saturated Tn5 insertion library was grown in vitro under either 2.5 (H2O2L) or 3.5 mM H2O2 (H2O2H). We identified two sets of overlapping genes required for resistance of S...
December 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29212844/protein-synthesis-is-lowered-by-4ebp1-and-eif2-%C3%AE-signaling-while-protein-degradation-may-be-maintained-in-fasting-hypoxic-amazonian-cichlid-astronotus-ocellatus
#17
A A Cassidy, W R Driedzic, D Campos, W Heinrichs-Caldas, V M F Almeida-Val, A L Val, S G Lamarre
The Amazonian cichlid, Astronotus ocellatus, is highly tolerant to hypoxia, and is known to reduce its metabolic rate by reducing the activity of energetically expensive metabolic processes when oxygen is lacking in their environment. Our objectives were to determine how protein metabolism is regulated in A. ocellatus during hypoxia. Fish were exposed to a stepwise decrease in air saturation (100%, 20%, 10% and 5%) for 2 hours at each level, and sampled throughout the experiment. A flooding dose technique using a stable isotope allowed us to observe an overall decrease in protein synthesis during hypoxia in liver, muscle, gill and heart...
December 6, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29211505/the-effect-of-dietary-nitrate-on-nocturnal-sleep-disordered-breathing-and-arterial-oxygen-desaturation-at-high-altitude
#18
Alexander Patrician, Harald Engan, David Lundsten, Ludger Grote, Helena Vigetun-Haughey, Erika Schagatay
Patrician, Alexander, Harald Engan, David Lundsten, Ludger Grote, Helena Vigetun-Haughey, and Erika Schagatay. The effect of dietary nitrate on nocturnal sleep-disordered breathing and arterial oxygen desaturation at high altitude. High Alt Med Biol 00:000-000, 2017.-Sleep-disordered breathing and fluctuations in arterial oxygen saturation (SaO2) are common during sleep among lowlanders ascending to high altitude. Dietary nitrate (NO3-) supplementation has been shown to lower the O2 consumption in various conditions...
December 6, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/29211125/oxygen-saturation-in-the-dental-pulp-of-maxillary-and-mandibular-molars-part-2
#19
Carlos Estrela, Keila Sa Oliveira, Ana Helena G Alencar, Fernando B Barletta, Cyntia Ra Estrela, Wilson T Felippe
This study determined the oxygen saturation (SaO2) in dental pulp of healthy maxillary and mandibular molars. Mean of SaO2 was evaluated in 112 maxillary and mandibular molars using pulse oximetry. Quantitative variables were described by mean and standard deviation. Variables with symmetric distribution were compared by Student t test and Mann-Whitney test. Pearson's correlation coefficient was used to correlate quantitative variables. Analysis of variance was used to assess differences in SaO2 levels between the molar groups, followed by post-hoc Tukey...
November 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29210925/frequency-of-desaturation-and-association-with-hemodynamic-adverse-events-during-tracheal-intubations-in-picus
#20
Simon Li, Ting-Chang Hsieh, Kyle J Rehder, Sholeen Nett, Pradip Kamat, Natalie Napolitano, David A Turner, Michelle Adu-Darko, J Dean Jarvis, Conrad Krawiec, Ashley T Derbyshire, Keith Meyer, John S Giuliano, Joana Tala, Keiko Tarquinio, Michael D Ruppe, Ronald C Sanders, Matthew Pinto, Joy D Howell, Margaret M Parker, Gabrielle Nuthall, Michael Shepherd, Guillaume Emeriaud, Yuki Nagai, Osamu Saito, Jan Hau Lee, Dennis W Simon, Alberto Orioles, Karen Walson, Paula Vanderford, Asha Shenoi, Anthony Lee, Geoffrey L Bird, Michael Miksa, Ana Lia Graciano, Jesse Bain, Peter W Skippen, Lee A Polikoff, Vinay Nadkarni, Akira Nishisaki
OBJECTIVES: Oxygen desaturation during tracheal intubation is known to be associated with adverse ICU outcomes in critically ill children. We aimed to determine the occurrence and severity of desaturation during tracheal intubations and the association with adverse hemodynamic tracheal intubation-associated events. DESIGN: Retrospective cohort study as a part of the National Emergency Airway Registry for Children Network's quality improvement project from January 2012 to December 2014...
November 28, 2017: Pediatric Critical Care Medicine
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