Acute respiratory distress syndrome (ARDS) is a serious and potentially life-threatening lung condition that can affect children. Currently, ventilator settings commonly used in treatment are based on approaches developed for adults, and it remains unclear whether these settings are equally effective for children. Because children's bodies respond differently than adults', it is important to determine the most effective ventilator strategies specifically for pediatric patients. This study will compare two different ventilator approaches in children with ARDS to identify which method provides the greatest benefit. The findings will also help inform the design of a larger study in the future.
age > 2 weeks (> 38 weeks corrected gestational age) and < 18 years (not yet had 18th birthday)
acute (≤ 7 days of risk factor) respiratory failure requiring invasive mechanical ventilation
ventilated with endotracheal tube or tracheostomy for ≤ 7 days from risk factor onset
hypoxemia defined as PaO2/FIO2 (measurement of the amount of oxygen dissolved in the blood plasma/concentration of inhaled oxygen) > 300 (or SpO2/FIO2 (measurement of the percentage of hemoglobin in your blood that is carrying oxygen/concentration of inhaled oxygen) > 315 on Positive End-Expiratory Pressure (PEEP) ≥ 5 cmH2O (rate of pressure delivery) on two consecutive measurements 4 hours apart and sustained at the time of consent and randomization
None
Parallel
High Driving Pressure Mechanical Ventilation
Other interventionA participant who is already invasively mechanically ventilated will be placed on "Pressure Control Ventilation" mode on an Evita V500 (Manufacturer: Dräger, Lübeck, Germany) ventilator if they are not already. The driving pressure will be set to 25 cmH2O (rate of pressure delivery). The Children's Hospital of Philadelphia (CHOP) PICU's standard of care regarding sedation, fluid management, ventilator weaning, and extubation readiness for invasively mechanically ventilated children will be adhered to for the duration of the study. An Enlight 2100 Electrical Impedance Tomography (EIT) Device (Manufacturer: Timpel) strap will be placed across the participant's chest up to four times throughout the study for a few hours to image the aeration in the lungs.
Low Driving Pressure Mechanical Ventilation
Other interventionA participant who is already invasively mechanically ventilated will be placed on "Pressure Control Ventilation" mode on an Evita V500 (Manufacturer: Lübeck, Germany) ventilator if they are not already. The driving pressure will be set to 15 cmH2O (rate of pressure delivery). CHOP PICU's standard of care regarding sedation, fluid management, ventilator weaning, and extubation readiness for invasively mechanically ventilated children will be adhered to for the duration of the study. An Enlight 2100 (EIT) Device (Manufacturer: Timpel) strap will be placed across the participant's chest up to four times throughout the study for a few hours to image the aeration in the lungs.
Sustained Resolution of Hypoxemia
The primary outcome of PARMA is time (in hours) per participant to sustained resolution of hypoxemia, defined as being alive with PaO2/FIO2 (measurement of the amount of oxygen dissolved in the blood plasma/concentration of inhaled oxygen) \> 300 (or SpO2/FIO2 (measurement of the percentage of hemoglobin in your blood that is carrying oxygen/concentration of inhaled oxygen) \> 315) on two consecutive measurements 4 hours apart. This outcome is censored at 28 days (672 hours).
Imaging (Electrical Impedance Tomography (EIT)): Lung recruitment
EIT (Electronic Impedance Tomography) is an FDA-approved non-radiating method of imaging lung aeration. EIT bands are placed on the subject and EIT imaging will be performed at three time points to assess the assigned study arm. The percentage of patients with recruited lung at the immediate post-randomization EIT, relative to pre-randomization EIT measurement will be determined.
Imaging (Electrical Impedance Tomography (EIT)): Overdistension
EIT (Electronic Impedance Tomography) is an FDA-approved non-radiating method of imaging lung aeration. EIT bands are placed on the subject and EIT imaging will be performed at three time points to assess the assigned study arm. The percentage of patients with overdistended lung at the immediate post-randomization EIT, relative to pre-randomization EIT measurement will be determined.
Imaging (Electrical Impedance Tomography (EIT)): Center of Ventilation
EIT (Electronic Impedance Tomography) is an FDA-approved non-radiating method of imaging lung aeration. EIT bands are placed on the subject and EIT imaging will be performed at three time points to assess the assigned study arm. The average value of center of ventilation for each study arm at the immediate post-randomization EIT will be compared.
Clinical End Point: all-cause mortality at 90 days
Total number of participants all-cause mortality at 90 days after enrollment or hospital discharge.
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Children's Hospital of Philadelphia
Lead sponsor
University of Pennsylvania
Collaborator
