Question 1

A HAFOE (high air flow with oxygen enrichment) mask is operating at 50%, and the oxygen flowmeter is set at 15 L/min. What is the total flow to the patient?

Accepted Answer

C

Question 2

Which of the following are high-flow delivery devices?
I. disposable non-rebreathing mask
II. high air flow with oxygen enrichment (HAFOE) mask
III. anesthesia bag-mask systems
IV. partial rebreathing mask

Accepted Answer

High-flow delivery devices are devices that deliver oxygen at a high flow rate. Disposable non-rebreathing mask and partial rebreathing mask deliver oxygen at a lower flow rate compared to HAFOE mask and anesthesia bag-mask systems. Therefore, options I and IV are not high-flow delivery devices. Anesthesia bag-mask systems and HAFOE mask are high-flow delivery devices, and the answer is C.

Question 3

Low-flow oxygen delivery devices:
I. vary in the concentration that they deliver
II. deliver concentrations that are influenced by the patient's respiratory rate
III. deliver concentrations that are influenced by the patient's respiratory pattern
IV. deliver concentrations that are influenced by the patient's tidal volume

Accepted Answer

Low-flow oxygen delivery devices, such as nasal cannulas and simple face masks, do not provide a fixed concentration of oxygen. The actual concentration delivered varies because it is influenced by the patient's respiratory rate, pattern, and tidal volume, among other factors.

Question 4

A HAFOE (high air flow with oxygen enrichment) mask is set at 24%, and the oxygen flowmeter is running at 3 L/min. What is the total flow to the patient?

Accepted Answer

The answer of A HAFOE (high air flow with oxygen...

Question 5

A high-flow oxygen delivery device:

Accepted Answer

A high-flow oxygen delivery device is designed to meet or exceed the patient's inspiratory flow demand, thus providing all of the patient's inspiratory needs.

Question 6

A high-flow oxygen delivery device is set at 35%, and the oxygen flowmeter is set at 5 L/min. What is the total flow to the patient?

Accepted Answer

The total flow to the patient can be calculated by dividing the set flow rate by the fraction of inspired oxygen (FiO2) minus the ambient air fraction (21%). For a device set at 35% oxygen, the calculation is 5 L/min divided by (0.35 - 0.21), which equals approximately 30 L/min.

Question 7

A HAFOE (high air flow with oxygen enrichment) mask is set at 50%. What is the air-to-oxygen entrainment ratio?

Accepted Answer

The air-to-oxygen entrainment ratio is calculated by dividing the total gas flow by the oxygen flow. A HAFOE mask delivers a mixture of high-flow air and oxygen enriched gas to the patient. If the mask is set at 50%, then the oxygen flow is half of the total flow. Therefore, the air-to-oxygen entrainment ratio would be 1.7:1. (total flow = 100%, oxygen flow = 50%, air flow = 50%, 50/30=1.7)

Question 8

HAFOE (high air flow with oxygen enrichment) masks operate using:

Accepted Answer

The answer of HAFOE (high air flow with oxygen enrichment)...

Question 9

At 40%, a HAFOE (high air flow with oxygen enrichment) mask is operating with an air-to-oxygen entrainment ratio of:

Accepted Answer

A HAFOE mask delivers both air and oxygen to the patient, and the air-to-oxygen entrainment ratio is the ratio of air to oxygen being delivered. At 40%, the ratio would be 3 parts air to 1 part oxygen, or 3:1. Therefore, the best choice is C.

Question 10

Oxygen therapy is indicated in the acute care setting for adults with: I. PaO₂ < 60 mmHg II. SpO₂ < 90% III. suspected hypoxemia IV. acute myocardia infarction

Accepted Answer

Oxygen therapy is indicated for adults in the acute care setting with PaO2 < 60 mmHg, SpO2 < 90%, suspected hypoxemia, and during acute myocardial infarction to ensure adequate oxygenation of tissues, including the heart.

Question 11

A HAFOE (high air flow with oxygen enrichment) is set at 35%. What is the air-to-oxygen entrainment ratio?

Accepted Answer

The answer of A HAFOE (high air flow with oxygen...

Question 12

Oxygen therapy is indicated in the sub-acute or home setting for adults with: I. PaO₂ < 55 mmHg II. SpO₂ < 88% III. hypoxemia in association with cor pulmonale IV. pulmonary hypertension

Accepted Answer

Oxygen therapy is indicated for adults with PaO2 < 55 mmHg, SpO2 < 88%, hypoxemia in association with cor pulmonale, and pulmonary hypertension, as these conditions can lead to tissue hypoxia and require supplemental oxygen to maintain adequate oxygen saturation and partial pressure.

Question 13

Most high-flow oxygen systems work using:

Accepted Answer

The answer of Most high-flow oxygen systems work using:
...

Question 14

A HAFOE (high air flow with oxygen enrichment) is set at 24%. What is the air-to-oxygen entrainment ratio?

Accepted Answer

The answer of A HAFOE (high air flow with oxygen...

Question 15

A low-flow oxygen delivery device:
I. meets all of the patient's inspiratory needs
II. meets part of the patient's inspiratory needs
III. entrains room air
IV. delivers 100% oxygen

Accepted Answer

Low-flow oxygen delivery devices, such as nasal cannulas and simple face masks, do not provide enough flow to meet all of a patient's inspiratory needs, thus they meet only part of the patient's inspiratory needs (II) and entrain room air to make up the difference (III).

Question 16

Oxygen delivery through a HAFOE (high air flow with oxygen enrichment) mask:

Accepted Answer

Oxygen delivery through a HAFOE mask is not affected by the patient's tidal volume, respiratory rate, or breathing pattern. The high flow of oxygen enriched air ensures a consistent and sufficient delivery of oxygen regardless of the patient's breathing parameters.

Question 17

A low-flow oxygen delivery device:

Accepted Answer

A low-flow oxygen delivery device provides only a part of a patient's inspiratory needs, while a high-flow device provides all. Hence, options A and D are incorrect. Low-flow devices can also operate from room air, not just 100% oxygen, making option C incorrect.

Question 18

At 3 L/min, a nasal cannula delivers approximately what F_IO₂?

Accepted Answer

At 3 L/min, a nasal cannula delivers approximately 32% oxygen to the patient. This is based on the general rule that each liter of oxygen flow per minute increases the oxygen concentration by about 4%, starting from a baseline of 21% (room air).

Question 19

A HAFOE (high air flow with oxygen enrichment) mask is set at 40%, and the oxygen flowmeter is running at 6 L/min. What is the total flow to the patient?

Accepted Answer

The total flow to the patient would be calculated by adding the oxygen flowmeter rate (6 L/min) to the high air flow rate (40% of the total flow). If the total flow rate is not given, we assume it is 10 L/min for an HAFOE mask. Therefore, 40% of 10 L/min is 4 L/min, so the total flow to the patient would be 6 L/min + 4 L/min = 10 L/min. Therefore, the correct answer is C) 24 L/min, since the total flow rate for an HAFOE mask is typically 15 L/min, and 40% of 15 L/min is 6 L/min. Adding these two together, the total flow to the patient would be 6 L/min + 15 L/min = 21 L/min. However, since the closest answer choice is 24 L/min, that is the best option.

Question 20

A nasal cannula running at 2 L/min delivers approximately what F_IO₂?

Accepted Answer

A nasal cannula running at 2 L/min delivers approximately 24% F_IO₂.

Quiz 2: Medical Gas Therapy Equipment

A HAFOE (high air flow with oxygen enrichment) mask is operating at 50%, and the oxygen flowmeter is set at 15 L/min. What is the total flow to the patient?

Which of the following are high-flow delivery devices? I. disposable non-rebreathing mask II. high air flow with oxygen enrichment (HAFOE) mask III. anesthesia bag-mask systems IV. partial rebreathing mask

A HAFOE (high air flow with oxygen enrichment) mask is set at 24%, and the oxygen flowmeter is running at 3 L/min. What is the total flow to the patient?

A high-flow oxygen delivery device:

A high-flow oxygen delivery device is set at 35%, and the oxygen flowmeter is set at 5 L/min. What is the total flow to the patient?

A HAFOE (high air flow with oxygen enrichment) mask is set at 50%. What is the air-to-oxygen entrainment ratio?

HAFOE (high air flow with oxygen enrichment) masks operate using:

At 40%, a HAFOE (high air flow with oxygen enrichment) mask is operating with an air-to-oxygen entrainment ratio of:

Oxygen therapy is indicated in the acute care setting for adults with: I. PaO2 < 60 mmHg II. SpO2 < 90% III. suspected hypoxemia IV. acute myocardia infarction

A HAFOE (high air flow with oxygen enrichment) is set at 35%. What is the air-to-oxygen entrainment ratio?

Oxygen therapy is indicated in the sub-acute or home setting for adults with: I. PaO2 < 55 mmHg II. SpO2 < 88% III. hypoxemia in association with cor pulmonale IV. pulmonary hypertension

Most high-flow oxygen systems work using:

A HAFOE (high air flow with oxygen enrichment) is set at 24%. What is the air-to-oxygen entrainment ratio?

A low-flow oxygen delivery device: I. meets all of the patient's inspiratory needs II. meets part of the patient's inspiratory needs III. entrains room air IV. delivers 100% oxygen

Oxygen delivery through a HAFOE (high air flow with oxygen enrichment) mask:

A low-flow oxygen delivery device:

At 3 L/min, a nasal cannula delivers approximately what FIO2?

A HAFOE (high air flow with oxygen enrichment) mask is set at 40%, and the oxygen flowmeter is running at 6 L/min. What is the total flow to the patient?

A nasal cannula running at 2 L/min delivers approximately what FIO2?

Oxygen therapy is indicated in the acute care setting for adults with: I. PaO₂ < 60 mmHg II. SpO₂ < 90% III. suspected hypoxemia IV. acute myocardia infarction

Oxygen therapy is indicated in the sub-acute or home setting for adults with: I. PaO₂ < 55 mmHg II. SpO₂ < 88% III. hypoxemia in association with cor pulmonale IV. pulmonary hypertension

At 3 L/min, a nasal cannula delivers approximately what F_IO₂?

A nasal cannula running at 2 L/min delivers approximately what F_IO₂?