Certified Respiratory Therapist Practice Exam

To effectively humidify the respiratory tract of an intubated patient, which device is most beneficial?

1. Simple mask with supplemental O2

2. Large-volume heated nebulizer

3. Portable compressor nebulizer

4. High-flow nasal cannula

The correct answer is: Large-volume heated nebulizer

The large-volume heated nebulizer is the most beneficial device for effectively humidifying the respiratory tract of an intubated patient due to its ability to deliver heated and sterile aerosolized water or saline directly to the airway. This type of nebulizer can produce high flow rates of concentrated humidity, which is critical in maintaining airway moisture and promoting mucociliary function in patients who are unable to generate adequate secretions independently due to intubation. Maintaining optimal humidity levels in the airway is essential for preventing complications such as atelectasis, airway obstruction, and infections. The heated component of the nebulizer is significant because it ensures that the moisture remains in aerosol form and is more readily absorbed in the upper airways rather than condensing in the tubing. In contrast, the other options either do not provide adequate humidity or are not designed specifically for this purpose. A simple mask with supplemental oxygen may supply oxygen but lacks the capability to effectively humidify the air that the patient receives. The portable compressor nebulizer is primarily designed for shorter treatments and may not deliver the consistent large-volume humidity required for an intubated patient. Finally, a high-flow nasal cannula is typically used for patients who are not intubated and may not achieve the same level of