The device that presents the least risk of cross-contamination as a room humidifier is which of the following?
a. Bubble humidifier c. Wick humidifier
b. Large-volume nebu-lizer d. Ultrasonic nebulizer
ANS: C
Passover and wick type of humidifiers present less risk of cross-contamination than does the ul-trasonic nebulizer as a room humidifier, which can easily become contaminated, resulting in air-borne transmission of pathogens.
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