Question 1

A heat-moisture exchangers has an efficiency rating of 80%. What does this mean?

Accepted Answer

A)  Of the exhaled water vapor, 80% returns to the patient on inspiration.
B)  The inspired temperature is 80% of the expired temperature.
C)  Of the exhaled water vapor, 20% returns to the patient on inspiration.
D)  The device provides 80% relative humidity at body temperature.

Question 2

The greater the temperature of the gas, the:

Accepted Answer

A)  more water vapor it can hold
B)  less water vapor it can hold
C)  less efficient the humidifier is
D)  more water vapor is lost

Question 3

When using water traps to help minimize the problems caused by condensation in a heated humidifier ventilator circuit, where would you place the traps?

Accepted Answer

A)  in the expiratory limb only, at a high point in the circuit
B)  in both the expiratory and inspiratory limbs, at high points in the circuit
C)  in the expiratory limb only, at a low point in the circuit
D)  in both the expiratory and inspiratory limbs, at low points in the circuit

Question 4

Heat-moisture exchangers (HMEs)  are mainly used to do what?

Accepted Answer

A)  warm and humidify gases delivered to the trachea via ventilator circuits
B)  humidify therapeutic gases delivered at high flows to the lower airway
C)  provide extra humidity for a patient with thick or retained secretions
D)  warm and humidify dry therapeutic gases delivered to the upper airway

Question 5

Which type of humidifier "traps" the patient's body heat and expired water vapor to raise the humidity of inspired gas?

Accepted Answer

A)  membrane
B)  bubble
C)  heat-moisture exchanger
D)  passover

Question 6

An ideal heat-moisture exchanger (HME)  should have an efficiency rating of at least which of the following?

Accepted Answer

A)  30%
B)  50%
C)  70%
D)  90%

Question 7

For which of the following patients might you recommend bland aerosol therapy via an ultrasonic nebulizer (USN) ?
I.patient with upper airway edema
II.patient with a bypassed upper airway
III.patient who must provide a sputum specimen

Accepted Answer

A)  I, II, and III
B)  II and III
C)  II
D)  III

Question 8

The risk of overhydration with continuous delivery of bland water aerosols is greatest among which patient group?
I.patients with fluid or electrolyte imbalances
II.patients with fever and infection
III.infants and small children

Accepted Answer

A)  I, II, and III
B)  I and II
C)  II and III
D)  I and III

Question 9

How often should heat-moisture exchangers be inspected and replaced?

Accepted Answer

A)  at least every shift
B)  when contaminated by secretions
C)  at least every day
D)  when condensate is visible

Question 10

For which of the following patients might you recommend bland aerosol therapy administration?
I.patient with upper airway edema
II.patient with a bypassed upper airway
III.patient who must provide a sputum specimen

Accepted Answer

A)  I, II, and III
B)  II and III
C)  I and II
D)  I and III

Question 11

In checking a servo-controlled heated-wire humidifier system, you notice that a few drops of condensate tend to form but only near the patient's airway. Based on this observation, what can you conclude?

Accepted Answer

A)  The gas at the airway is fully saturated.
B)  The temperature setting of the heater is too high.
C)  The airway temperature exceeds the dew point.
D)  The temperature setting of the heater is too low.

Question 12

Which of the following measures can help to ensure a good sputum sample?

Accepted Answer

A)  using an ultrasonic nebulizer instead of a jet nebulizer
B)  using a 5% saline solution instead of a 3% concentration
C)  having the patient rinse the mouth or blow the nose before induction
D)  using the lowest possible aerosol density (high flow and low output)

Question 13

Key considerations in selecting or recommending humidity or bland aerosol therapy for a patient include which of the following?
I.required gas flow
II.presence of an artificial tracheal airway
III.character of pulmonary secretions
IV.need for or duration of mechanical ventilation
V.presence of heat-moisture exchanger (HME)  contraindications

Accepted Answer

A)  II, III, and IV
B)  I, II, and III
C)  III, IV, and V
D)  I, II, III, IV, and V

Question 14

Which of the following best describes the performance of a typical hygroscopic condenser HME?

Accepted Answer

A)  40 mg/L water vapor exhaled; 27 mg/L returned
B)  40 mg/L water vapor exhaled; 20 mg/L returned
C)  27 mg/L water vapor exhaled; 40 mg/L returned
D)  44 mg/L water vapor exhaled; 37 mg/L returned

Question 15

What are some problems common to mist tents?
I.heat retention
II.CO2 buildup
III.hypothermia

Accepted Answer

A)  I, II, and III
B)  I and II
C)  II and III
D)  I and III

Question 16

What should happen when the remote temperature sensor of a heated humidifier becomes disconnected or fails?
I.	Power to the heater should be interrupted.
II.	Auditory and visual alarms should trigger.
III.	The unit’s outlet valve should lock closed.

Accepted Answer

A)  I and II
B)  II and III
C)  I and III
D)  I, II, and III

Question 17

All of the following are true regarding large-volume jet nebulizers except:

Accepted Answer

A)  A variable air-entrainment port allows air mixing and different FIO2 values.
B)  Liquid particles are generated by mechanical vibration energy.
C)  They are pneumatically powered and attach directly to a flowmeter.
D)  Baffling causes impaction or removal of large, unstable particles.

Question 18

All of the following are potential hazards of using a heated humidifier during mechanical ventilation except:

Accepted Answer

A)  aerosolization of condensate during disconnection
B)  underhydration or impaction of secretions
C)  hypoventilation due to increased dead space
D)  unintended tracheal lavage from condensate

Question 19

Which of the following inspired conditions should be maintained when delivering medical gases to the nose or mouth?

Accepted Answer

A)  50% relative humidity (RH)  at 20° to 22° C
B)  100% RH at 20° to 22° C
C)  80% RH at 28° to 32° C
D)  100% RH at 32° to 35° C

Question 20

All of the following are potential hazards of using heat-moisture exchangers except:

Accepted Answer

A)  failure of low-pressure alarms to detect disconnection
B)  underhydration or impaction of secretions
C)  hypoventilation due to increased dead space
D)  unintended tracheal lavage from condensate

Exam 35: Humidity and Bland Aerosol Therapy

For which of the following patients might you recommend bland aerosol therapy administration? I.patient with upper airway edema II.patient with a bypassed upper airway III.patient who must provide a sputum specimen

Correct Answer
verified

What are some problems common to mist tents? I.heat retention II.CO₂ buildup III.hypothermia

Correct Answer
verified

When using water traps to help minimize the problems caused by condensation in a heated humidifier ventilator circuit, where would you place the traps?

Correct Answer
verified

The greater the temperature of the gas, the:

Correct Answer
verified

An ideal heat-moisture exchanger (HME) should have an efficiency rating of at least which of the following?

Correct Answer
verified

Correct Answer
verified

Which type of humidifier "traps" the patient's body heat and expired water vapor to raise the humidity of inspired gas?

Correct Answer
verified

Which of the following inspired conditions should be maintained when delivering medical gases to the nose or mouth?

Correct Answer
verified

All of the following are true regarding large-volume jet nebulizers except:

Correct Answer
verified

In checking a servo-controlled heated-wire humidifier system, you notice that a few drops of condensate tend to form but only near the patient's airway. Based on this observation, what can you conclude?

Correct Answer
verified

All of the following are potential hazards of using heat-moisture exchangers except:

Correct Answer
verified

Which of the following measures can help to ensure a good sputum sample?

Correct Answer
verified

A heat-moisture exchangers has an efficiency rating of 80%. What does this mean?

Correct Answer
verified

How often should heat-moisture exchangers be inspected and replaced?

Correct Answer
verified

Which of the following best describes the performance of a typical hygroscopic condenser HME?

Correct Answer
verified

All of the following are potential hazards of using a heated humidifier during mechanical ventilation except:

Correct Answer
verified

Heat-moisture exchangers (HMEs) are mainly used to do what?

Correct Answer
verified

The risk of overhydration with continuous delivery of bland water aerosols is greatest among which patient group? I.patients with fluid or electrolyte imbalances II.patients with fever and infection III.infants and small children

Correct Answer
verified

What should happen when the remote temperature sensor of a heated humidifier becomes disconnected or fails? I. Power to the heater should be interrupted. II. Auditory and visual alarms should trigger. III. The unit’s outlet valve should lock closed.

Correct Answer
verified

For which of the following patients might you recommend bland aerosol therapy via an ultrasonic nebulizer (USN) ? I.patient with upper airway edema II.patient with a bypassed upper airway III.patient who must provide a sputum specimen

Correct Answer
verified

Exam 35: Humidity and Bland Aerosol Therapy

For which of the following patients might you recommend bland aerosol therapy administration? I.patient with upper airway edema II.patient with a bypassed upper airway III.patient who must provide a sputum specimen

Correct AnswerverifiedShow Answer

What are some problems common to mist tents? I.heat retention II.CO2 buildup III.hypothermia

Correct AnswerverifiedShow Answer

When using water traps to help minimize the problems caused by condensation in a heated humidifier ventilator circuit, where would you place the traps?

Correct AnswerverifiedShow Answer

The greater the temperature of the gas, the:

Correct AnswerverifiedShow Answer

An ideal heat-moisture exchanger (HME) should have an efficiency rating of at least which of the following?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which type of humidifier "traps" the patient's body heat and expired water vapor to raise the humidity of inspired gas?

Correct AnswerverifiedShow Answer

Which of the following inspired conditions should be maintained when delivering medical gases to the nose or mouth?

Correct AnswerverifiedShow Answer

All of the following are true regarding large-volume jet nebulizers except:

Correct AnswerverifiedShow Answer

In checking a servo-controlled heated-wire humidifier system, you notice that a few drops of condensate tend to form but only near the patient's airway. Based on this observation, what can you conclude?

Correct AnswerverifiedShow Answer

All of the following are potential hazards of using heat-moisture exchangers except:

Correct AnswerverifiedShow Answer

Which of the following measures can help to ensure a good sputum sample?

Correct AnswerverifiedShow Answer

A heat-moisture exchangers has an efficiency rating of 80%. What does this mean?

Correct AnswerverifiedShow Answer

How often should heat-moisture exchangers be inspected and replaced?

Correct AnswerverifiedShow Answer

Which of the following best describes the performance of a typical hygroscopic condenser HME?

Correct AnswerverifiedShow Answer

All of the following are potential hazards of using a heated humidifier during mechanical ventilation except:

Correct AnswerverifiedShow Answer

Heat-moisture exchangers (HMEs) are mainly used to do what?

Correct AnswerverifiedShow Answer

The risk of overhydration with continuous delivery of bland water aerosols is greatest among which patient group? I.patients with fluid or electrolyte imbalances II.patients with fever and infection III.infants and small children

Correct AnswerverifiedShow Answer

What should happen when the remote temperature sensor of a heated humidifier becomes disconnected or fails? I. Power to the heater should be interrupted. II. Auditory and visual alarms should trigger. III. The unit’s outlet valve should lock closed.

Correct AnswerverifiedShow Answer

For which of the following patients might you recommend bland aerosol therapy via an ultrasonic nebulizer (USN) ? I.patient with upper airway edema II.patient with a bypassed upper airway III.patient who must provide a sputum specimen

Correct AnswerverifiedShow Answer

Correct Answer
verified

What are some problems common to mist tents? I.heat retention II.CO₂ buildup III.hypothermia

Correct Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
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