The concentration of oxygen delivered to the patient with an air-entrainment mask depends on which of the following?
1. Flow of the oxygen exiting the jet nozzle
2. Size of the jet nozzle outlet
3. Size of the entrainment port
4. Size of the Venturi mask
a. 1, 2, and 3 c. 1, 2, and 4
b. 2, 3, and 4 d. 3 and 4
Q. 2 Theoretically, a nonrebreathing mask can deliver 100 oxygen, assuming that the mask fits ap-propriately on the patient's face and is the only source of gas being inhaled by the patient.
However, in actual practice, the disposable nonrebreathing mask can deliver what percentage of FIO2?
a. 0.30-0.50 c. 0.60-0.80
b. 0.40-0.60 d. 0.24-0.50
Q. 3 Which of the following are advantages of transtracheal catheters?
1. Increase patient mobility
2. Improve patient compliance because of an enhanced cosmetic appearance
3. Increase the amounts of nasal irritation
4. Heighten the risk for mucus plugging
a. 1, 2, and 3 c. 1 and 2
b. 2 and 3 d. 1, 2, 3, and 4
Q. 4 The FIO2 that is actually delivered to the patient through an oxygen mask depends on which of the following?
1. Flow of the oxygen to the mask
2. Presence of a reservoir bag
3. Humidity of the gas
4. Density of the gas
a. 1 and 2 c. 1 and 4
b. 2 and 3 d. 3 and 4
Q. 5 A simple mask can deliver what percentage of FIO2 at how many liters/minute?
a. 0.24 to 0.44 at 1-6 L/min c. 0.40 to 0.60 at 10-15 L/min
b. 0.35 to 0.50 at 5-10 L/min d. 0.50 to 0.80 at 5-10 L/min
Q. 6 The main goal of a pulse-demand oxygen-delivery system is which of the following?
1. To provide oxygen only during expiration
2. To provide oxygen only during inspiration
3. To deliver oxygen to the patient only after a sufficient inspiratory effort is made and the de-mand valve opens
4. To deliver oxygen at a preset flow rate and close during inspiration to conserve oxygen
a. 1 and 3 c. 2 and 3
b. 2 and 4 d. 1 and 4
Q. 7 The statement that is true concerning reservoir cannulas is which of the following?
a. The mustache cannula can hold about 40 mL of gas.
b. The pendant cannula can reduce oxygen supply use by 75.
c. Patients prefer the mustache cannula to the pendant cannula.
d. Pendant cannulas can be concealed by the patient's clothing.
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