Jet nebulizers and USNs are commonly used to administer aerosol to patients during mechanical…

Jet nebulizers and USNs are commonly used to administer
aerosol to patients during mechanical ventilation. Commonly, a nebulizer is
filled with a standard unit dose of 3 ml of medication at the beginning of the
aerosol treatment, and the RT finds as much or more fluid in the medication
reservoir 20 to 30 minutes later. The additional fluid is usually condensate
(often contaminated from patient secretions), which drains from the inspiratory
limb into the gravitydependent reservoir of the nebulizer. Even heated wire
circuits may have condensate. Although pathogens in a dry circuit have minimal
chance of contaminating the patient’s airway, aerosolizing the pathogens
provides a vehicle for infectious material to enter the airway and the lung
parenchyma.

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