A patient has a 0.40 air-entrainment mask on and is not tolerating it well at this time because of claustrophobia. A nasal cannula is placed on the patient. What liter flow should be set to match the appropriate FIO2?
a. 2 c. 4
b. 3 d. 5
Q. 2 A patient is receiving supplemental oxygen via a 30 air-entrainment mask set at 8 L/min. The respiratory therapist must increase the supplemental oxygen to 40. To maintain the same total output, the flow rate must be increased to _____ L/min.
a. 10 c. 16
b. 14 d. 18
Q. 3 A home care patient calls to inform the respiratory therapist that his transtracheal catheter acci-dentally fell out last night and that he was unable to reinsert it. The patient should be told to:
a. insert a dilating or stenting device.
b. continue attempts to reinsert the catheter.
c. use a nasal cannula and call his physician as soon as possible.
d. use a nasal cannula until another transtra-cheal catheter is delivered to the home.
Q. 4 ______ law states that the degree to which a gas enters into a physical solution in body fluids is directly proportional to the partial pressure of gas to which the fluid is exposed?
a. Dalton's c. Gay-Lussac's
b. Henry's d. Boyle's
Q. 5 A 60-year-old man with a 90 pack-years smoking history arrives in the emergency department on a nonrebreathing mask with an SpO2 of 88.
The arterial blood gas results at this time indicate a pH of 7.38, PCO2 of 58, and partial pressure of oxygen (PO2) of 54. Which action should the respiratory therapist take at this time?
a. Keep the nonrebreathing mask on the pa-tient.
b. Administer an 80:20 heliox concentration.
c. Place a nasal cannula set at 6 L/min.
d. Place an air-entrainment mask on the pa-tient that delivers 0.40 FIO2.
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