Humidity & Aerosol. A gas is saturated with 100% relative humidity at 32.2 ° C (90 ° F). As the gas cools to 26.7 ° C (80 ° F), the relative humidity will A. increase by 10%. B. remain 100% and excess water will rain out. C. decrease as a result of cooling of the gas.
Humidity & Aerosol
A gas is saturated with 100% relative humidity at 32.2 ° C (90 ° F). As the gas cools to 26.7 ° C (80 ° F), the relative humidity will
A. increase by 10%.
B. remain 100% and excess water will rain out.
C. decrease as a result of cooling of the gas.
D. decrease as water condenses.
A 2-year old child recently diagnosed with laryngotracheobronchitis requires the administration of 40% oxygen. What is the most appropriate method for delivering the oxygen?
A heat moisture exchanger is most appropriate for a patient
A. who is receiving noninvasive positive pressure ventilation.
B. with ARDS who is receiving mechanical ventilation.
C. who is receiving mechanical ventilation in the PACU.
D. with a bronchopleural fistula who is receiving mechanical ventilation.
What is a major advantage of a wick humidifier compared with other types of humidifiers?
A. Operation is most efficient at room temperature.
B. Both molecular and particulate water are produced.
C. A relative humidity of 100% is easily produced.
D. A baffle is not needed to produce the desired humidity.
Which of the following is the major function of the baffle in a nebulizer?
A. entraining water from the capillary tube
B. providing aerosol particles that are consistently small
C. mixing aerosol particles with the main gas flow
D. promoting laminar inspiratory flow
Which of the following devices can provide the greatest total fluid output?
A. ultrasonic nebulizer
B. large volume jet nebulizer
C. bubble humidifier
D. heated Cascade humidifier
Which of the following is the most probable cause of insufficient aerosol output in a mist tent?
A. decreased temperature within the canopy
B. compressor switch in the off position
C. overfilled condensate bottle
D. a clogged capillary tube in the nebulizer
The respiratory therapist is called to check an oxyhood in the NICU. The unit is using a large volume nebulizer and an air/oxygen blender with a flowmeter. The therapist notes the pressure pop-off valve on the nebulizer is chattering. Which of the following actions is required?
A. Increase the flowmeter from 5 to 8 L/min.
B. Check the tubing to the oxyhood for an obstruction.
C. Reposition the capillary tube in the nebulizer.
D. Tighten the high pressure supply line connections to the blender.
A patient is receiving an F I O 2 of 0.40 by a heated nebulizer connected to a T-piece. Five hours later, the F I O 2 analyzed at the nebulizer side of the T-piece is 0.45. Which of the following should the respiratory therapist do to correct the problem?
A. Clear the nebulizer jet.
B. Replace the nebulizer.
C. Empty the condensate from the aerosol tubing.
D. Increase the flow to the nebulizer.