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Background: There is an argument whether the delayed intubation aggravate the respiratory failure in Acute respiratory distress syndrome (ARDS) patients with coronavirus disease 2019 (COVID-19). We aimed to investigate the effect of high-flow nasal cannula (HFNC) failure before mechanical ventilation on clinical outcomes in mechanically ventilated patients with COVID-19.
Methods: This retrospective cohort study included mechanically ventilated patients who were diagnosed with COVID-19 and admitted to the intensive care unit (ICU) between February 2020 and December 2021 at Asan Medical Center. The patients were divided into HFNC failure (HFNC-F) and mechanical ventilation (MV) groups according to the use of HFNC before MV. The primary outcome of this study was to compare the worst values of ventilator parameters from day 1 to day 3 after mechanical ventilation between the two groups.
Results: Overall, 158 mechanically ventilated patients with COVID-19 were included in this study: 107 patients (67.7%) in the HFNC-F group and 51 (32.3%) in the MV group. The two groups had similar profiles of ventilator parameter from day 1 to day 3 after mechanical ventilation, except of dynamic compliance on day 3 (28.38 mL/cmH2O in MV vs. 30.67 mL/H2O in HFNC-F, p = 0.032). In addition, the HFNC-F group (5.6%) had a lower rate of ECMO at 28 days than the MV group (17.6%), even after adjustment (adjusted hazard ratio, 0.30; 95% confidence interval, 0.11-0.83; p = 0.045).
Conclusions: Among mechanically ventilated COVID-19 patients, HFNC failure before mechanical ventilation was not associated with deterioration of respiratory failure.
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http://dx.doi.org/10.1186/s12931-024-02671-y | DOI Listing |
J Heart Lung Transplant
September 2025
Department of Medicine, University of California, San Francisco, CA; Department of Anesthesia and the Cardiovascular Research Institute, University of California, San Francisco, CA.
Heart Lung
September 2025
The First School of Clinical Medicine, Southern Medical University, Guangzhou 510515, China; Department of Critical Care Medicine, General Hospital of Southern Theatre Command of Chinese PLA, Guangzhou 510010, China; Guangdong Branch Center, National Clinical Research Center for Geriatric Diseases,
Background: Standardized spontaneous breathing trial (SBT) techniques for patients with heart failure (HF) are lacking.
Objectives: To compare the efficacy of low-level pressure-supported ventilation (PSV) and T-piece SBT techniques in patients with HF.
Methods: This single-center, prospective, open-label, randomized controlled study enrolled mechanically ventilated adults with stage B HF (Nov 2022-Apr 2024).
J Hazard Mater
September 2025
Architectural Engineering Department, Pennsylvania State University, University Park, PA, USA. Electronic address:
Far-UVC systems and air cleaners are effective strategies for controlling airborne pathogen transmission, particularly in densely occupied spaces with insufficient ventilation, such as school classrooms. This study evaluates the disinfection performance and ozone (O) formation of different far-UVC systems and air cleaners in a standard-sized classroom using computational fluid dynamics (CFD) simulation. Results show that ceiling-mounted far-UVC systems reduce airborne pathogen exposure by up to 30 % more than upper-room and wall-mounted configurations, based on intake fractions and room-average concentrations.
View Article and Find Full Text PDFJ Crit Care
September 2025
Universidade do Oeste de Santa Catarina, Campus de Joaçaba, Brazil; Hospital Universitário Santa Terezinha, Joaçaba, Brazil. Electronic address:
Background: Timely extubation is essential in ICU patients, yet traditional predictors such as the rapid shallow breathing index (RSBI) have limited accuracy. Diaphragm and lung ultrasound offer promising, non-invasive alternatives for assessing extubation readiness.
Methods: We conducted a prospective observational study nested within a randomized trial in a university ICU.
J Med Ultrason (2001)
September 2025
Department of Emergency Medicine, Faculty of Medicine, Kindai University, Osaka, Japan.
Purpose: This study aimed to investigate muscle atrophy in critically ill patients using ultrasonography. We compared the rectus femoris (a major muscle of the lower limbs) with the sternocleidomastoid (an accessory respiratory muscle).
Methods: Thirty-four patients hospitalized at the Critical Care Medical Center of Kindai University Hospital between January 2022 and March 2023 were enrolled.