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- W2891582021 abstract "<b><i>Background:</i></b> Hydrogen-oxygen mixture (H<sub>2</sub>-O<sub>2</sub>) may reduce airway resistance in patients with acute severe tracheal stenosis, yet data supporting the clinical use of H<sub>2</sub>-O<sub>2</sub> are insufficient. <b><i>Objectives:</i></b> To evaluate the efficacy and safety of breathing H<sub>2</sub>-O<sub>2</sub> in acute severe tracheal stenosis. <b><i>Methods:</i></b> Thirty-five consecutive patients with severe acute tracheal stenosis were recruited in this prospective self-control study. Air, H<sub>2</sub>-O<sub>2</sub> and O<sub>2</sub> inhalation was given in 4 consecutive breathing steps: air for 15 min, H<sub>2</sub>-O<sub>2</sub> (6 L per min, H<sub>2</sub>:O<sub>2</sub> = 2: 1) for 15 min, oxygen (3 L per min) for 15 min, and H<sub>2</sub>-O<sub>2</sub> for 120 min. The primary endpoint was inspiratory effort as assessed by diaphragm electromyography (EMGdi); the secondary endpoints were transdiaphragmatic pressure (Pdi), Borg score, vital signs, and impulse oscillometry (IOS). The concentration of H<sub>2</sub> in the ambient environment was obtained with 12 monitors. Adverse reactions during the inhalation were recorded. <b><i>Results:</i></b> The mean reduction in the EMGdi under H<sub>2</sub>-O<sub>2</sub> was 10.53 ± 6.83%. The EMGdi significantly decreased during 2 H<sub>2</sub>-O<sub>2</sub> inhalation steps (Steps 2 and 4) compared with air (Step 1) and O<sub>2</sub> (Step 3) (52.95 ± 15.00 vs. 42.46 ± 13.90 vs. 53.20 ± 14.74 vs. 42.50 ± 14.12% for Steps 1 through 4, <i>p</i> < 0.05). The mean reduction in the Pdi under H<sub>2</sub>-O<sub>2</sub> was 4.77 ± 3.51 cmH<sub>2</sub>O. Breathing H<sub>2</sub>-O<sub>2</sub> significantly improved the Borg score and resistance parameters of IOS but not vital signs. No adverse reactions occurred. H<sub>2</sub> was undetectable in the environment throughout the procedure. <b><i>Conclusions:</i></b> Breathing H<sub>2</sub>-O<sub>2</sub> may reduce the inspiratory effort in patients with acute severe tracheal stenosis and can be used for this purpose safely." @default.
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- W2891582021 date "2018-09-18" @default.
- W2891582021 modified "2023-10-05" @default.
- W2891582021 title "Breathing Hydrogen-Oxygen Mixture Decreases Inspiratory Effort in Patients with Tracheal Stenosis" @default.
- W2891582021 doi "https://doi.org/10.1159/000492031" @default.
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