338 results match your criteria oxygen cylinders

[Emission Characteristics and Atmospheric Chemical Reactivity of Volatile Organic Compounds(VOCs) in Automobile Repair Industry].

Huan Jing Ke Xue 2021 Aug;42(8):3604-3614

Beijing Municipal Research Institute of Environmental Protection, Beijing 100037, China.

Volatile organic compounds (VOCs) emitted by the automobile repair industry are an important source of ozone precursors. However, the current reduction policy generally focuses on the emissions of VOCs, without considering their chemical reactivity. Based on an investigation of the development status of China's automobile repair industry, this study analyzes VOCs emission nodes in different sections of automobile repair enterprises. Read More

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Mucormycosis: An opportunistic pathogen during COVID-19.

Environ Res 2021 Jul 6;201:111643. Epub 2021 Jul 6.

Human Molecular Cytogenetics and Stem Cell Laboratory, Department of Human Genetics and Molecular Biology, Bharathiar University, Coimbatore, 641-046, India. Electronic address:

The pandemic of coronavirus disease 2019 (COVID-19) still remains on an upsurge trend. The second wave of this disease has led to panic in many countries, including India and some parts of the world suffering from the third wave. As there are no proper treatment options or remedies available for this deadly infection, supportive care equipment's such as oxygen cylinders, ventilators and heavy use of steroids play a vital role in the management of COVID-19. Read More

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Cost analysis and critical success factors of the use of oxygen concentrators versus cylinders in sub-divisional hospitals in Fiji.

BMC Health Serv Res 2021 Jul 2;21(1):636. Epub 2021 Jul 2.

Department of Paediatrics: Child & Youth Health, University of Auckland, Auckland, New Zealand.

Background: Oxygen is vital in the treatment of illnesses in children and adults, yet is lacking in many low and middle-income countries health care settings. Oxygen concentrators (OCs) can increase access to oxygen, compared to conventional oxygen cylinders. We investigated the costs and critical success factors of OCs in three hospitals in Fiji, and extrapolated these to estimate the oxygen delivery cost to all Sub-Divisional hospitals (SDH) nationwide. Read More

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LCA and economic study on the local oxygen supply in Central Europe during the COVID-19 pandemic.

Sci Total Environ 2021 Sep 29;786:147401. Epub 2021 Apr 29.

AGH University of Science and Technology, Faculty of Energy and Fuels, Department of Coal Chemistry and Environmental Sciences, Al. Mickiewicza 30, 30-059 Kraków, Poland. Electronic address:

Medical oxygen is the key to survival for COVID-19 patients. To meet the pandemic-driven oxygen demand spike, local hospitals began searching for a suitable medical oxygen delivery system. Among the studies published on the impact of COVID-19 on a range of aspects, including the global economy and the environment, no study has been conducted on the environmental impact of medical oxygen supply to hospitals under epidemic conditions. Read More

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September 2021

Isotope Fractionation of Gaseous-, Supercritical-, and Dual-Phase Carbon Dioxide in Pressurized Cylinders Exposed to Variable Temperatures.

ACS Omega 2021 Mar 19;6(12):8625-8629. Epub 2021 Mar 19.

Air Liquide, Innovation Campus Delaware, Newark, Delaware 19702, United States.

This work examines the stable isotope fractionation of carbon and oxygen in gaseous, supercritical, and liquid carbon dioxide systems at temperatures from -27.1 to +43.5 °C. Read More

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Meeting oxygen requirements of rural India: A self-contained solution.

Indian J Public Health 2021 Jan-Mar;65(1):82-84

Director, AIIMS, New Delhi, India.

Addressing oxygen requirements of rural India should aim at using a safe, low-cost, easily available, and replenishable source of oxygen of moderate purity. This may be possible with the provision of a self-sustaining oxygen concentrator (pressure swing adsorption with multiple molecular sieve technology) capable of delivering oxygen at high-flow rates, through a centralized distribution system to 100 or more bedded rural hospitals, with back up from an oxygen bank of 10 × 10 cylinders. This will provide a 24 × 7 supply of oxygen of acceptable purity (~93%) for the treatment of hypoxemic conditions and will enable hospitals to specifically provide for high-flow oxygen in at least 15% of the beds. Read More

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Effects of Long Durations of RF-Magnetron Sputtering Deposition of Hydroxyapatite on Titanium Dental Implants.

Eur J Dent 2021 Jan 28. Epub 2021 Jan 28.

Department of Prosthodontics, College of Dentistry, University of Baghdad, Baghdad, Iraq.

Objectives:  Dental implant is a revolution in dentistry; some shortages are still a focus of research. This study use long duration of radiofrequency (RF)-magnetron sputtering to coat titanium (Ti) implant with hydroxyapatite (HA) to obtain a uniform, strongly adhered in a few micrometers in thickness.

Materials And Methods:  Two types of substrates: discs and root form cylinders were prepared using a grade 1 commercially pure (CP) Ti rod. Read More

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January 2021

Hemocyanins of Muricidae: New 'Insights' Unravel an Additional Highly Hydrophilic 800 kDa Mass Within the Molecule.

J Mol Evol 2021 02 13;89(1-2):62-72. Epub 2021 Jan 13.

Institute of Molecular Physiology, Johannes Gutenberg-University of Mainz, Johann-Joachim-Becher-Weg 7, 55128, Mainz, Germany.

Hemocyanins are giant oxygen transport proteins that freely float within the hemolymph of most molluscs. The basic quaternary structure of molluscan hemocyanins is a cylindrical decamer with a diameter of 35 nm which is built of 400 kDa subunits. Previously published results, however, showed that one out of two hemocyanin subunits of Rapana venosa encompasses two polypeptides, one 300 kDa and one 100 kDa polypeptide which aggregate to typical 4 MDa and 8 MDa hemocyanin (di-)decamer molecules. Read More

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February 2021

The development and implementation of an oxygen treatment solution for health facilities in low and middle-income countries.

J Glob Health 2020 Dec;10(2):020425

Medical Research Council Unit The Gambia at London School of Hygiene & Tropical Medicine, Fajara, The Gambia.

Background: Oxygen reduces mortality from severe pneumonia and is a vital part of case management, but achieving reliable access to oxygen is challenging in low and middle-income country (LMIC) settings. We developed and field tested two oxygen supply solutions suitable for the realities of LMIC health facilities.

Methods: A Health Needs Assessment identified a technology gap preventing reliable oxygen supplies in Gambian hospitals. Read More

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December 2020

Dissolved oxygen deficits in a shallow eutrophic aquatic ecosystem (fishpond) - Sediment oxygen demand and water column respiration alternately drive the oxygen regime.

Sci Total Environ 2021 Apr 8;766:142647. Epub 2020 Oct 8.

Enki, o. p. s. - Public Benefit Corporation for Environmental Research, Education and Public Awareness, Dukelská 145, 37901, Třeboň, Czech Republic; Department of Landscape Management, Faculty of Agriculture, University of South Bohemia in České Budějovice, Branišovská 1645/31a, 37005, Czech Republic.

Biological processes tend to dominate the oxygen regime of productive waters. However, in shallow aquatic ecosystems, it is unclear whether the oxygen regime is driven by oxygen production and consumption in the water column or by sediment oxygen demand (SOD). In managed eutrophic ecosystems, this question is especially important in the context of extreme daily oscillations of dissolved oxygen (DO) that could breach physiological limits of heterotrophic aerobic organisms. Read More

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Preparedness of primary health care workers and audit of primary health centres for resuscitation in Port Harcourt, Rivers State, Southern Nigeria.

Pan Afr Med J 2020 4;36:68. Epub 2020 Jun 4.

Department of Paediatrics, University of Port Harcourt Teaching Hospital, Port Harcourt, Nigeria.

Introduction: Nigeria still has high newborn deaths and birth asphyxia remains a major cause. Birth attendants´ readiness to perform newborn resuscitation depends largely on their competence in basic resuscitation and availability of newborn resuscitation equipment to enable the various steps outlined in resuscitation guidelines to be applied quickly and appropriately. This study aimed to assess primary health care workers´ experience of neonatal resuscitation and audit primary health centres for availability of neonatal resuscitation equipment. Read More

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December 2020

Subject Preferences and Psychological Implications of Portable Oxygen Concentrator Versus Compressed Oxygen Cylinder in Chronic Lung Disease.

Respir Care 2021 Jan 28;66(1):33-40. Epub 2020 Jul 28.

Pulmonary Rehabilitation Unit, ICS Maugeri SpA SB, Institute of Telese Terme, Benevento, Italy.

Background: Oxygen therapy represents the elective therapy to improve the quality of life for patients with chronic respiratory diseases like COPD and interstitial lung disease. Lightweight portable oxygen concentrators (POCs) are a valid alternative to traditional systems such as portable compressed oxygen cylinders. However, patient preference and the possible psychological implications related to the use of both devices have been poorly assessed. Read More

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January 2021

Maintaining a high inspired oxygen fraction with the Elisée 350 turbine transport ventilator connected to two portable oxygen concentrators in an austere environment.

J Trauma Acute Care Surg 2020 09;89(3):e59-e63

From the Intensive Care and Anesthesia Federation (M.C., P-J.C., J.B., S.S., E.M., G.L.), Sainte Anne Military Teaching Hospital, Toulon; Central Establishment of Equipment of the Military Health Service (F.C.), Orléans; and Anesthesia Service (A.L.), Laveran Military Teaching Hospital, Marseille, France.

Background: Management of critically ill patients requiring mechanical ventilation in austere environments or during disaster response is a logistic challenge. Availability of oxygen cylinders for mechanically ventilated patient may be difficult in such a context. A solution to ventilate patients requiring high fraction of inspired oxygen (FiO2) is to use a ventilator able to be supplied by a low-pressure oxygen source connected with two oxygen concentrators (OCs). Read More

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September 2020

Ambulatory Oxygen in Fibrotic Interstitial Lung Disease: A Pilot, Randomized, Triple-Blinded, Sham-Controlled Trial.

Chest 2020 07 28;158(1):234-244. Epub 2020 Feb 28.

Department of Respiratory and Sleep Medicine, Austin Health, Heidelberg, Victoria, Australia; Institute for Breathing and Sleep, Heidelberg, Victoria, Australia; School of Medicine, University of Melbourne, Melbourne, Victoria, Australia.

Background: Despite a lack of evidence, ambulatory oxygen therapy is frequently prescribed for patients with interstitial lung disease (ILD) and exertional desaturation. Patients often prefer portable oxygen concentrators to oxygen cylinders. This study aimed to examine the feasibility of conducting a clinical trial of ambulatory oxygen delivered via portable concentrators in patients with ILD. Read More

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Numerical simulation of the blood oxygenation level-dependent functional magnetic resonance signal using finite element method.

Int J Numer Method Biomed Eng 2020 02 15;36(2):e3290. Epub 2019 Dec 15.

Fondazione Santa Lucia, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Rome, Italy.

Since the introduction of functional magnetic resonance imaging (fMRI), several computational approaches have been developed to examine the effect of the morphology and arrangement of blood vessels on the blood oxygenation-level dependent (BOLD) signal in the brain. In the present work, we implemented the original Ogawa's model using a numerical simulation based on the finite element method (FEM) instead of the analytical models. In literature, there are different works using analytical methods to analyse the transverse relaxation rate ( ), which BOLD signal is related to, modelling the vascular system with simple and canonical geometries such as an infinite cylinder model (ICM) or a set of cylinders. Read More

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February 2020

Oxygen devices and delivery systems.

Breathe (Sheff) 2019 Sep;15(3):e108-e116

1st Dept of Tuberculosis and Respiratory Diseases, General University Hospital and First Faculty of Medicine, Charles University, Prague, Czech Republic.

Oxygen use has extended from inpatient to outpatient settings for patients with chronic pulmonary diseases and complications of hypoxaemia. This article presents an overview of oxygen devices (oxygen concentrators, compressed gas cylinders and liquid oxygen) and delivery systems (high- and low-flow). The indications, advantages and disadvantages of each device and delivery system are presented, aiming to offer updated knowledge to the multidisciplinary team members managing patients with respiratory failure, and therefore allowing appropriate selection of devices and delivery systems that are tailored to the needs of each patient. Read More

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September 2019

Antimicrobial Effect Of Visible Blue Light Used In A Minimally Invasive Intramedullary Fracture Stabilization System.

J Bone Jt Infect 2019 18;4(5):216-222. Epub 2019 Sep 18.

Trauma Research Unit Department of Surgery, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands.

Since 2009, the IlluminOss System is being used as an intramedullary fracture treatment. The system is characterized by the use of blue light to polymerize liquid monomer after its infusion in a polyethylene terephthalate balloon. Very few infections of the material have been observed, which might be explained by the possible antimicrobial side-effect of the blue light used in this intramedullary fracture stabilization system. Read More

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September 2019

Acute Oxygen Therapy on Hospital Wards in Low Middle-Income Country: Experience from a Referral Centre in Ilorin, Nigeria.

West Afr J Med 2019 May-Aug;36(2):122-128

Department of Medicine, University of Ilorin Teaching Hospital, PMB 1459, Ilorin,Nigeria.

Background: Oxygen is like any other medication that can cause severe consequences if administered inappropriately.

Objective: To audit the pattern of acute oxygen therapy on regular hospital wards of a referral centre in Ilorin, Nigeria.

Methods: We reviewed 150 patients that received or had a prescription for acute oxygen therapy in three months and extracted relevant information using a proforma. Read More

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Healthcare-provider perceptions of barriers to oxygen therapy for paediatric patients in three government-funded eastern Ugandan hospitals; a qualitative study.

BMC Health Serv Res 2019 May 24;19(1):335. Epub 2019 May 24.

Wellcome Trust Centre for Clinical Tropical Medicine and Department of Paediatrics, Faculty of Medicine, Imperial College, London, W2 1PG, UK.

Background: This study aimed to assess on-the-ground barriers to the provision of oxygen therapy for paediatric patients in three government-funded Eastern Ugandan district general hospitals (DGHs).

Methods: Site visits to DGHs during March 2017 involved semi-structured interviews with medical officers, clinical officers, paediatric nurses and non-clinical staff (n = 29). MAXQDA qualitative data software was used to assist with response analysis. Read More

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A checklist for intrahospital transport of critically ill patients improves compliance with transportation safety guidelines.

Aust Crit Care 2020 01 10;33(1):20-24. Epub 2019 Apr 10.

Department of Anaesthesia and Pain Management and Intensive Care Unit, Royal Melbourne Hospital, Parkville, Victoria, Australia; Centre for Integrated Critical Care, University of Melbourne, Parkville, Victoria, Australia.

Objectives: Critically ill patients are often transferred from the intensive care unit (ICU) to other locations around the hospital during which adverse events, some life threatening, are common. An intercollegiate guideline covering the transport of critically ill patients exists in Australasia; however, compliance with this guideline has previously been shown to be poor, and its role in improving safety in transportation of patients in the ICU is unknown. We performed a pre-post interventional study in a tertiary metropolitan ICU, assessing the impact of the introduction of a transport checklist on guideline compliance. Read More

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January 2020

Use of bubble continuous positive airway pressure (bCPAP) in the management of critically ill children in a Malawian paediatric unit: an observational study.

BMJ Open Respir Res 2019 8;6(1):e000280. Epub 2019 Mar 8.

Malawian College of Medicine, Lilongwe, Malawi.

Introduction: In low-resource countries, respiratory failure is associated with a high mortality risk among critically ill children. We evaluated the role of bubble continuous positive airway pressure (bCPAP) in the routine care of critically ill children in Lilongwe, Malawi.

Methods: We conducted an observational study between 26 February and 15 April 2014, in an urban paediatric unit with approximately 20 000 admissions/year (in-hospital mortality <5% approximately during this time period). Read More

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Assessment of a storage system to deliver uninterrupted therapeutic oxygen during power outages in resource-limited settings.

PLoS One 2019 6;14(2):e0211027. Epub 2019 Feb 6.

Intellectual Ventures Laboratory, Bellevue, Washington, United States of America.

Access to therapeutic oxygen remains a challenge in the effort to reduce pneumonia mortality among children in low- and middle-income countries. The use of oxygen concentrators is common, but their effectiveness in delivering uninterrupted oxygen is gated by reliability of the power grid. Often cylinders are employed to provide continuous coverage, but these can present other logistical challenges. Read More

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November 2019

Influence of simplified, higher-concentrated sodium ascorbate application protocols on bond strength of bleached enamel.

J Clin Exp Dent 2019 Jan 1;11(1):e21-e26. Epub 2019 Jan 1.

DDS, Ms, PhD, professor, Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Ponta Grossa, Paraná, Brazil.

Background: Bleaching procedures performed before restorative procedures, due to the oxygen released, affects the quality of bonding restorations. The application of an lower-concentrated antioxidant for one-hour or more can reversal the compromised bonding to bleached enamel, but it was not effective according to the bleaching concentrations applied. The aim of the present study was to evaluate simplified protocol of higher-concentrated sodium ascorbate (35%SA) in bond strength values of enamel bleached with 10%, 16%, 22% carbamide peroxide (CP) or 35% hydrogen peroxide (HP). Read More

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January 2019

Emergency medical services oxygen equipment: a fomite for transmission of MRSA?

Emerg Med J 2019 Feb 1;36(2):89-91. Epub 2018 Dec 1.

Objectives: The primary purpose of this study was to determine if methicillin-resistant (MRSA) was present on the surface of oxygen cylinders and regulators used in the prehospital setting and secondarily to assess other surfaces for MRSA within the ambulance compartment, as a comparison.

Methods: On 17 March 2018, the surface of oxygen cylinders and regulators located in ambulances at an emergency medical services (EMS) station in North Alabama (n=9) and at an offsite oxygen cylinder storage area (n=70) were swabbed using sterile cotton-tipped applicators saturated in an 0.9% NaCl solution. Read More

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February 2019

The BOLD sensitivity of rapid steady-state sequences.

Magn Reson Med 2019 04 29;81(4):2526-2535. Epub 2018 Nov 29.

High-Field MR Center, Max Planck Institute for Biological Cybernetics, Tübingen, Germany.

Purpose: Relaxation and dephasing of water protons embedded in a vascular network is driven by local magnetic field inhomogeneities around deoxygenated blood vessels. These effects strongly depend on the relation between mean diffusion length and diameter of blood vessels, as well as on the chosen imaging sequence. In this work, the BOLD sensitivity of steady-state sequences as a function of vessel size, field strength, and sequence parameters are analyzed. Read More

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Neonatal anesthesia in low birth weight babies at Hospital Nacional Guido Valadares, Dili, Timor-Leste.

Robert F Grace

Paediatr Anaesth 2019 01 1;29(1):16-19. Epub 2018 Nov 1.

Department of Anaesthesia, Hospital Nacional Guido Valadares, Dili, Timor-Leste.

Over a 6-month period, eight neonates weighing less than 3 kg were operated on at Hospital Nacional Guido Valadares, Dili, Timor-Leste. Each was operated on for an abdominal condition. There is no postoperative neonatal ventilation, neonatal inotropes, fluid warmers, or parenteral nutrition available at Hospital Nacional Guido Valadares. Read More

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January 2019

Effect of anaerobic cure of self-etch adhesive on degree of conversion and shear bond strength.

Clin Oral Investig 2019 May 3;23(5):2227-2233. Epub 2018 Oct 3.

Dental Materials Research Lab, College of Dentistry, Faculty of Health Science, University of Manitoba, Winnipeg, MB, Canada.

Objective: The main aim was to evaluate the effect of postponing the curing of the adhesive layer until the first layer of composite resin is applied-hereby oxygen-inhibited layer (OIL) formation and its detrimental effect on the degree of conversion (DC) of self-etch adhesives should be prevented. For this purpose, the degree of conversion and shear bond strength of four current market self-etch adhesives were evaluated, assessing the effect of curing the adhesives anaerobically and then under two different thicknesses of composite resin, and compare this to the samples cured alone and in air.

Materials And Methods: The degrees of conversion were obtained by attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy, after the samples were prepared on a glass slide. Read More

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MRI-Based Quantification of Magnetic Susceptibility in Gel Phantoms: Assessment of Measurement and Calculation Accuracy.

Radiol Res Pract 2018 30;2018:6709525. Epub 2018 Jul 30.

Department of Medical Radiation Physics, Lund University, Skåne University Hospital Lund, 22185 Lund, Sweden.

The local magnetic field inside and around an object in a magnetic resonance imaging unit depends on the magnetic susceptibility of the object being magnetized, in combination with its geometry/orientation. Magnetic susceptibility can thus be exploited as a source of tissue contrast, and susceptibility imaging may also become a useful tool in contrast agent quantification and for assessment of venous oxygen saturation levels. In this study, the accuracy of an established procedure for quantitative susceptibility mapping (QSM) was investigated. Read More

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Direct imaging of structural changes induced by ionic liquid gating leading to engineered three-dimensional meso-structures.

Nat Commun 2018 08 3;9(1):3055. Epub 2018 Aug 3.

Max Planck Institute for Microstructure Physics, Halle, 06120, Germany.

The controlled transformation of materials, both their structure and their physical properties, is key to many devices. Ionic liquid gating can induce the transformation of thin-film materials over long distances from the gated surface. Thus, the mechanism underlying this process is of considerable interest. Read More

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