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Effectiveness of ultra-/very-high-frequency oscillations combined with helium-oxygen gas mixture in a rabbit model.
Sci Rep
October 2024
Department of Paediatrics, St. Marianna University School of Medicine, 2-16-1 Sugao Miyamae, Kawasaki, Kanagawa, 216-8511, Japan.
High-frequency oscillatory ventilation (HFOV) at frequencies of approximately 15 Hz is associated with optimal CO excretion. Higher frequencies using a nitrogen-oxygen gas mixture worsen CO excretion. An in vitro experiment using HFOV and a helium-oxygen gas mixture showed a significant increase in CO transport, which increased with increases in ventilation frequency.
View Article and Find Full Text PDFCerebral arterial air embolism (CAE) is a serious and potentially dangerous condition that can interrupt the blood supply to the brain and cause stroke. One of the promising gas mixtures for emergency treatment of air embolism is an oxygen-helium mixture. We modeled CAE in awake rats by injecting air into the common carotid artery.
View Article and Find Full Text PDF[Effects of helium-oxygen mechanical ventilation on inflammatory response of diseased lung segments and diaphragm function in patients with pneumonia].
Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
March 2024
Department of Critical Care Medicine, Fujian Medical University Union Hospital, Fuzhou 350401, Fujian, China. Corresponding author: Yu Ranjie, Email:
Objective: To investigate the clinical effect of helium-oxygen mechanical ventilation on inflammation of the diseased lung segment and diaphragm function in patients with acute respiratory distress syndrome (ARDS) caused by pneumonia who suffered difficulty weaning from mechanical ventilation.
Methods: A prospective controlled study was conducted. A total of 40 patients with ARDS caused by pneumonia and requiring tracheal intubation with difficulty weaning from mechanical ventilation, admitted to the department of critical care medicine in Pingtan Branch of Fujian Medical University Union Hospital from October 2020 to December 2021 were enrolled.
Efficient Oxidative Decomposition of Jet-Fuel -Tetrahydrodicyclopentadiene (JP-10) by Aluminum Nanoparticles in a Catalytic Microreactor: An Online Vacuum Ultraviolet Photoionization Study.
J Phys Chem A
March 2024
Department of Chemistry, University of Hawai'i at Manoa, Honolulu, Hawaii 96822, United States.
The oxidation of gas-phase -tetrahydrodicyclopentadiene (JP-10, CH) over aluminum nanoparticles (AlNP) has been explored between a temperature range of 300 and 1250 K with a novel chemical microreactor. The results are compared with those obtained from chemical microreactor studies of helium-seeded JP-10 and of helium-oxygen-seeded JP-10 without AlNP to gauge the effects of molecular oxygen and AlNP, respectively. Vacuum ultraviolet (VUV) photoionization mass spectrometry reveals that oxidative decomposition of JP-10 in the presence of AlNP is lowered by 350 and 200 K with and without AlNP, respectively, in comparison with pyrolysis of the fuel.
View Article and Find Full Text PDFDental silicate ceramics surface modification by nonthermal plasma: A systematic review.
Dent Mater
March 2024
Institut "Jožef Stefan", Ljubljana, Slovenia.
Objectives: Nonthermal atmospheric or low-pressure plasma (NTP) can improve the surface characteristics of dental materials without affecting their bulk properties. This study aimed to systematically review the available scientific evidence on the effectiveness of using NTP for the surface treatment of etchable, silica-based dental ceramics before cementation, and elucidate its potential to replace the hazardous and technically demanding protocol of hydrofluoric acid (HF) etching.
Methods: A valid search query was developed with the help of PubMed's Medical Subject Headings (MeSH) vocabulary thesaurus and translated to three electronic databases: PubMed, Web of Science, and Scopus.
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