There is one clinical trial.
Data on respiratory mechanics and gas exchange in acute respiratory failure in COVID-19 patients is limited. Knowledge of respiratory mechanics and gas exchange in COVID-19 can lead to different selection of mechanical ventilation strategy, reduce ventilator-associated lung injury and improve outcomes. The objective of the study is to evaluate the respiratory mechanics, lung recruitability and gas exchange in COVID-19 -associated acute respiratory failure during the whole course of mechanical ventilation - invasive or non-invasive.
Description: Positive end-expiratory pressure (PEEP) selection at minimum level with maximum static compliance and the highest peripheral capillary oxygen saturation over fraction of inspired oxygen (SpO2/FiO2)
Measure: Optimum positive end-expiratory pressure (PEEP) level Time: On day 1 during mechanical ventilationDescription: Positive end-expiratory pressure (PEEP) selection at minimum level with maximum static compliance and the highest peripheral capillary oxygen saturation over fraction of inspired oxygen (SpO2/FiO2)
Measure: Optimum positive end-expiratory pressure (PEEP) level Time: On day 7 during mechanical ventilationDescription: Peripheral capillary oxygen saturation (SpO2) change from 90% after recruitment maneuver (doubled tidal volume for 15 respiratory cycles) - if peripheral capillary oxygen saturation (SpO2) after recruitment maneuver more than 95%-recruitable
Measure: Number of patients with recruitable lung Time: On day 1 during mechanical ventilationDescription: Peripheral capillary oxygen saturation (SpO2) change from 90% after recruitment maneuver (doubled tidal volume for 15 respiratory cycles) - if peripheral capillary oxygen saturation (SpO2) after recruitment maneuver more than 95%-recruitable
Measure: Number of patients with recruitable lung Time: On day 7 during mechanical ventilationDescription: Calculation of the alveolar dead space using end-tidal carbon dioxide measurement and arterial carbon dioxide tension measurement
Measure: Change in alveolar dead space Time: On day 1, 3, 5, 7, 10, 14, 21 during mechanical ventilationDescription: Measurement of plethysmogram variability before and during recruitment maneuver
Measure: Change in plethysmogram variability during recruitment maneuver Time: On day 1, 3, 5, 7, 10, 14, 21 during mechanical ventilationDescription: Calculation of the arterial partial oxygen tension to inspiratory oxygen fraction (PaO2/FiO2) ratio using arterial oxygen tension measurement
Measure: Change in arterial partial oxygen tension to inspiratory oxygen fraction (PaO2/FiO2) ratio Time: On day 1, 3, 5, 7, 10, 14, 21 during mechanical ventilationDescription: Positive end-expiratory pressure (PEEP) selection at minimum level with maximum static compliance and the highest peripheral capillary oxygen saturation over fraction of inspired oxygen (SpO2/FiO2)
Measure: Optimum positive end-expiratory pressure (PEEP) level Time: On day 3, 5, 10, 14, 21 during mechanical ventilationDescription: Driving pressure calculation at different positive end-expiratory pressure (PEEP) levels (8, 10, 12, 14)
Measure: Change in driving pressure with different positive end-expiratory pressure (PEEP) levels Time: On day 1, 3, 5, 7, 10, 14, 21 during mechanical ventilation