Helium/oxygen (heliox) mixtures are advantageous in treating obstructive lung disease (refractory asthma) because:
A) the gas viscosity is lower
B) higher oxygen concentrations are possible
C) helium doesn't dissolve into the plasma
D) the density of the gas is lower
Q. 2 When setting the flowmeter on a partial rebreathing mask, oxygen flow
A) should be at least 10 L/min
B) should be set at flush (maximum setting)
C) should be adjusted to maintain the desired PaCO2
D) should be adjusted to keep the bag full
Q. 3 The only absolute contraindication for hyperbaric therapy is:
A) subcutaneous emphysema
B) upper respiratory infections
C) bullous emphysema
D) untreated pneumothorax
Q. 4 Hyperbaric oxygen therapy is approved for the treatment of:
I. gas gangrene
II. radiation necrosis
III. carbon monoxide poisoning
IV. necrotizing soft tissue infections
A) I
B) I and II
C) I, II, and III
D) I, II, III, and IV
Q. 5 Hyperbaric oxygen therapy:
A) increases the PaO2
B) increases oxygen saturation (SaO2)
C) decreases elimination of carbon monoxide
D) increases the size of dissolved gas bubbles
Q. 6 Hyperbaric oxygen therapy is the application of oxygen at:
A) ambient pressure
B) sub-ambient pressure
C) greater than ambient pressure
D) none of the above
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