Evaluating Safety and Efficacy of Umbulizer in Patients Requiring Intermittent Positive Pressure Ventilation

Exclusion criteria

• ✕. Patients with significant airway resistance (i.e. severe chronic obstructive pulmonary disease or asthma) where clinical investigator is concerned about gas trapping or barotrauma
• ✕. Patients with very low lung compliance (i.e. severe acute respiratory distress syndrome or restrictive disease) where clinical investigator is concerned about problems delivering sufficient tidal volume or end expiratory pressure
• ✕. Patients who experienced a myocardial infarction within the last 6 weeks
• ✕. Patients who are determined by a clinical investigator to be too hemodynamically unstable to be enrolled