Question 1

Which of the following are true regarding the ideal breathing pattern for aerosol delivery?
I. rapid fast inspiration
II. slow deep inspiration
III. an end inspiration breath hold
IV. breath hold before inspiration

Accepted Answer

The ideal breathing pattern for aerosol delivery includes a slow deep inspiration followed by an end-inspiration breath hold. This method enhances the deposition of the aerosol in the lungs.

Question 2

The Thera-Mist P35000 humidifier:
I. can provide heated humidity
II. can provide body humidity at minute volumes of up to 20 L/min
III. operates using a wick
IV. uses a diffusion grid

Accepted Answer

The Thera-Mist P35000 humidifier can provide heated humidity, can provide body humidity at minute volumes of up to 20 L/min, and operates using a wick.

Question 3

When placing a thermometer or thermistor probe to monitor a heated humidifier's temperature output, the probe:

Accepted Answer

Placing the probe proximal to the patient ensures the most accurate monitoring of the temperature the patient is actually exposed to, as it accounts for any temperature changes that may occur as the heated air travels through the circuit.

Question 4

According to the American Association for Respiratory Care Clinical Practice Guideline: Humidification During Invasive and Non-Invasive Mechanical Ventilation, which of the following are contraindications for the use of a heat moisture exchanger (HME)?
I. thick copious secretions
II. body temperature less than 30 degrees Celsius
III. spontaneous minute volumes > 10 L/min

Accepted Answer

Heat moisture exchangers (HMEs) are contraindicated in patients with thick copious secretions because they can clog the HME, in patients with body temperature less than 30 degrees Celsius because the HME may not function effectively at very low body temperatures, and in patients with spontaneous minute volumes greater than 10 L/min because the HME may not provide adequate humidification at high flow rates.

Question 5

According to the AARC Clinical Practice Guideline: Oxygen Therapy for Adults in the Acute Care Setting, use of humidification with flows < 4 L/min:

Accepted Answer

According to the AARC Clinical Practice Guideline, humidification is not recommended for oxygen therapy with flows less than 4 L/min.

Question 6

A baffle or a wall distal to the jet of an aerosol generator:
I. stabilizes size of particles
II. removes larger particles from suspension
III. works by inertial impaction
IV. allows smaller particles to pass

Accepted Answer

A baffle or a wall distal to the jet of an aerosol generator stabilizes the size of particles by removing larger particles from suspension through the mechanism of inertial impaction. This process allows smaller particles to pass, making the aerosol more uniform in particle size.

Question 7

An advantage of the Thera-Mist P35000 humidifier is:

Accepted Answer

The Thera-Mist P35000 humidifier has all of the mentioned advantages - it isolates gas and water in the heating element, preventing cross-contamination, and has high gas flow delivery.

Question 8

The Fisher and Paykel MR 850 humidifier operates using:

Accepted Answer

The Fisher and Paykel MR 850 humidifier operates using pass-over technology where the gas flow passes over a water surface to pick up moisture, providing humidification to the patient.

Question 9

According to the American Association for Respiratory Care Clinical Practice Guideline: Humidification During Mechanical Ventilation, a humidifier chosen should:
I. provide at least 30 mg/L water vapor
II. provide body humidity
III. provide a temperature of at least 30 degrees Celsius
IV. provide a temperature of at least 37 degrees Celsius

Accepted Answer

The answer of According to the American Association for Respiratory...

Question 10

Factors that can be applied to increase the efficiency of a humidifier are:
I. increased temperature
II. increased surface area
III. increased time for contact
IV. added baffle

Accepted Answer

The answer of Factors that can be applied to increase...

Question 11

Many bubble humidifiers incorporate which of the following safety features?
I. Diameter Index Safety System (DISS) inlet fitting
II. 2 psi pop-off valve
III. sealed prefilled reservoir

Accepted Answer

Bubble humidifiers incorporate a DISS inlet fitting, a 2 psi pop-off valve, and a sealed prefilled reservoir for safety.

Question 12

When humidifying an artificial airway using a heated humidifier, equipment you need includes:
I. large bore tubing (22-mm diameter)
II. drainage bag or trap
III. thermometer or temperature probe
IV. sterile water

Accepted Answer

When humidifying an artificial airway using a heated humidifier, all listed equipment is necessary: large bore tubing to ensure adequate airflow, a drainage bag or trap to collect condensation, a thermometer or temperature probe to monitor the temperature of the humidified air, and sterile water to prevent contamination.

Question 13

According to the AARC Clinical Practice Guideline: Oxygen Therapy for Adults in the Acute Care Setting, use of humidification when flow exceeds 4 L/min:

Accepted Answer

According to the AARC Clinical Practice Guideline, use of humidification is recommended when flow exceeds 4 L/min in the acute care setting.

Question 14

According to the American Association for Respiratory Care Clinical Practice Guideline: Humidification During Invasive and Non-Invasive Mechanical Ventilation, a heat moisture exchanger (HME) should:

Accepted Answer

The answer of According to the American Association for Respiratory...

Question 15

Most aerosol generators that are pneumatically powered operate using:

Accepted Answer

The answer of Most aerosol generators that are pneumatically powered...

Question 16

Relative humidity output from most disposable bubble humidifiers range from:

Accepted Answer

Most disposable bubble humidifiers provide a relative humidity output ranging from 33-40%, which is considered appropriate for medical purposes as it adds sufficient moisture to the inspired air without causing excess condensation in the airway.

Question 17

The difference between an atomizer and a nebulizer is:

Accepted Answer

The answer of The difference between an atomizer and a...

Question 18

In a pneumatically powered small-volume nebulizer, fluid moves up the capillary tube because:

Accepted Answer

In a pneumatically powered small-volume nebulizer, fluid moves up the capillary tube because of a pressure differential. The gas flow creates a low-pressure area, which draws the fluid up the tube and into the gas stream. Capillary action alone is not strong enough to move fluid up the tube in this situation.

Question 19

Heat and moisture exchangers (HMEs):
I. provide 70% to 90% relative humidity
II. provide temperatures between 30 and 31 degrees Celsius
III. are intended for short-term use
IV. may be used without an artificial airway

Accepted Answer

Heat and moisture exchangers (HMEs) are designed to provide 70% to 90% relative humidity and temperatures between 30 and 31 degrees Celsius, making statements I and II correct. They are generally intended for short-term use in patients with artificial airways, making statement III correct. However, they require an artificial airway to function properly, making statement IV incorrect.

Question 20

The Fisher and Paykel MR 850 humidifier:
I. is servo controlled
II. uses pass-over humidification
III. can use heated wire circuits
IV. can deliver temperatures between 29 and 40 degrees Celsius

Accepted Answer

The Fisher and Paykel MR 850 humidifier is servo controlled, uses pass-over humidification, can use heated wire circuits, and can deliver temperatures between 29 and 40 degrees Celsius.

Quiz 3: Humidity and Aerosol Therapy Equipment

Which of the following are true regarding the ideal breathing pattern for aerosol delivery? I. rapid fast inspiration II. slow deep inspiration III. an end inspiration breath hold IV. breath hold before inspiration

The Thera-Mist P35000 humidifier: I. can provide heated humidity II. can provide body humidity at minute volumes of up to 20 L/min III. operates using a wick IV. uses a diffusion grid

When placing a thermometer or thermistor probe to monitor a heated humidifier's temperature output, the probe:

According to the AARC Clinical Practice Guideline: Oxygen Therapy for Adults in the Acute Care Setting, use of humidification with flows < 4 L/min:

A baffle or a wall distal to the jet of an aerosol generator: I. stabilizes size of particles II. removes larger particles from suspension III. works by inertial impaction IV. allows smaller particles to pass

An advantage of the Thera-Mist P35000 humidifier is:

The Fisher and Paykel MR 850 humidifier operates using:

Factors that can be applied to increase the efficiency of a humidifier are: I. increased temperature II. increased surface area III. increased time for contact IV. added baffle

Many bubble humidifiers incorporate which of the following safety features? I. Diameter Index Safety System (DISS) inlet fitting II. 2 psi pop-off valve III. sealed prefilled reservoir

When humidifying an artificial airway using a heated humidifier, equipment you need includes: I. large bore tubing (22-mm diameter) II. drainage bag or trap III. thermometer or temperature probe IV. sterile water