Certified Respiratory Therapist Practice Exam

Which type of aerosol generator is recommended for providing humidification to a patient with an artificial airway?

1. Small-volume nebulizer

2. Ultrasonic nebulizer

3. Large-reservoir heated jet nebulizer

4. Portable nebulizer

The correct answer is: Ultrasonic nebulizer

The use of an ultrasonic nebulizer is recommended for providing humidification to a patient with an artificial airway due to its ability to produce very fine aerosol particles, which can be particularly advantageous for patients who may have compromised respiratory function or require precise delivery of moisture. Ultrasonic nebulizers employ high-frequency sound waves to generate a mist, allowing for deep penetration into the airways and effective humidification of inspired air. This method also enhances the comfort of the patient and the humidity level delivered can be controlled, making it versatile for various clinical situations. The fine particle size produced by the ultrasonic nebulizer allows for better absorption and avoids the risk of creating larger droplets that may not be as effective in reaching deeper airways. In comparison, small-volume nebulizers typically deliver larger droplets, which may not penetrate as deeply into the lungs, while large-reservoir heated jet nebulizers can be effective but may require more maintenance and are not as portable. Portable nebulizers also tend to be less effective in delivering consistent humidity, especially in a clinical setting. Hence, in the context of humidification for patients with an artificial airway, the ultrasonic nebulizer stands out for its effectiveness and efficiency.