A method of ventilating a patient is provided. The method comprises measuring a patient physiological parameter while the patient is in a first position and recording the measured patient physiological parameter as a baseline. The method further comprises tilting the patient from the first position to a second position and measuring the patient physiological parameter when the patient is in the second position. The method further comprises performing an action based on a change in the measured physiological parameter from the baseline when the patient is in the second position. The action is at least one of modifying a ventilation parameter, generating an alert, and providing a recommendation.