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Exam 35: Humidity and Bland Aerosol Therapy

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Question 41

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All of the following are TRUE about humidification and contact time except:

A) The longer a gas is exposed to water, the greater is the amount of evaporation.
B) The rate of gas flow through a humidifier determines contact time.
C) Low flows decrease and high flows increase relative humidity output.
D) Bubble humidifier contact time depends on the water column depth.

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Question 42

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What is the total water output of unheated large-volume jet nebulizers?

A) 10 to 16 mg H₂O/L
B) 16 to 25 mg H₂O/L
C) 26 to 35 mg H₂O/L
D) 33 to 55 mg H₂O/L

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Question 43

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What is the most reliable indicator that the gas delivered by a servo-controlled heated-wire humidifier system is fully saturated at the airway?

Which of the following are types of heat-moisture exchangers (HMEs) ? I.simple condenser II.hygroscopic condenser III.hydrophobic condenser

When using nebulizers, where should you place them to minimize risk of contamination?

To minimize problems with environmental safety when aerosol therapy is prescribed for immunosuppressed patients or those with tuberculosis, what precautions should you follow? I.those for tuberculosis exposure II.Centers for Disease Control and Prevention (CDC) standards and contact precautions III.CDC standards and airborne precautions

The aerosol output (in mg/L) of an ultrasonic nebulizer depends mainly on which of the following?

All of the following are features of an ideal heat-moisture exchanger (HME) except:

A patient with chronic obstructive pulmonary disease (COPD) is receiving heated water aerosol treatments through a jet nebulizer four times daily as a supplement to other bronchial hygiene measures designed to aid in mobilizing retained secretions. After each session, you notice the presence of moderate wheezing. Which of the following recommendations would you make to the physician?

At high flow rates, what do some bubble humidifiers produce?

The temperature of gas delivered to a patient's airway by a servo-controlled heated humidifier should not vary by more than how much?

Which of the following mean mass aerodynamic diameter (MMAD) aerosol suspensions is produced by an ultrasonic nebulizer operated at 1.25 MHz?

All of the following are true of heat-moisture exchangers (HMEs) except:

Administration of dry gases at flows exceeding 4 L/min can cause which of the following? I.structural damage II.heat loss III.water loss

Unheated bubble humidifiers are of limited effectiveness at flows above which of the following?

Which of the following methods are used to heat the gas delivered by a heated humidifier system? I.using a wraparound heater (yoke or collar) II.placing a heating element in-line with gas flow III.using a reservoir immersion heater IV.placing a "hot plate" at humidifier base

A design that increases surface area and enhances evaporation by incorporating an absorbent material partially submerged in a water reservoir that is surrounded by a heating element best describes what type of humidifier?

Which of the following is FALSE about heated humidifier condensate?

A patient receiving ventilatory support is being provided with humidification using a heat-moisture exchanger (HME) . A physician orders a bronchodilator drug administered through a metered-dose inhaler (MDI) via the ventilator circuit. Which of the following must be performed to ensure delivery of the drug to the patient?

To produce the highest possible density aerosol from an ultrasonic nebulizer, how would you set the controls? Amplitude Flow