ARDS Ventilator Weaning Protocol

Introduction to Weaning

The American Thoracic Society recommends implementing daily spontaneous breathing trials (SBTs) as the cornerstone of the weaning strategy once the patient achieves a PaO2/FiO2 ratio >200 mmHg and PEEP <10 cmH2O, with hemodynamic stability and reduced ventilatory drive 1

The Society of Critical Care Medicine suggests beginning the weaning process when the ARDS patient meets all of the following criteria: PaO2/FiO2 ratio >200 mmHg, PEEP reduced to <10 cmH2O, hemodynamic stability without vasopressor agents, patient is arousable, no new potentially serious conditions, and low FiO2 requirements that can be safely delivered with face mask or nasal cannula 1, 2, 3
The American College of Chest Physicians recommends that patients should have improved respiratory mechanics and reduced patient ventilatory drive before initiating weaning 1

The American Association for Respiratory Care suggests performing daily SBTs using CPAP or T-piece, and proceeding immediately to extubation if the SBT is successful 1, 2, 3

The European Society of Intensive Care Medicine recommends watching for critical warning signs of weaning failure, including tidal volumes persistently >9.5 mL/kg predicted body weight, rapid shallow breathing index (RSBI) >105 breaths/min/L, excessive spontaneous respiratory effort, and high respiratory rate 1

The American Thoracic Society categorizes ARDS patients into three distinct weaning categories: short weaning (70% of patients), difficult weaning (15% of patients), and prolonged weaning (15% of patients) 1

The American College of Chest Physicians recommends using noninvasive ventilation (NIV) immediately after extubation in patients at high risk for extubation failure, including those with difficult or prolonged weaning trajectories, borderline respiratory mechanics, and significant comorbidities affecting respiratory function 1

The Society of Critical Care Medicine suggests maintaining tidal volumes 4-8 mL/kg predicted body weight, keeping plateau pressures <30 cmH2O, and ensuring patient-ventilator synchrony is optimal before using partial ventilatory support modes 1, 2, 4, 5

The American Association for Respiratory Care recommends avoiding attempts to wean before optimizing oxygenation parameters, ignoring excessive spontaneous respiratory effort, proceeding with partial support modes when patient-ventilator asynchrony is present, delaying extubation after successful SBT, and forgetting to elevate the head of bed 30-45 degrees to prevent ventilator-associated pneumonia 1, 2, 3