A physician orders a 70% He:30% O2 mixture to reduce the work of breathing in a patient having an acute asthmatic attack. Which of the following delivery systems would be appropriate in this case?

Side effects of inhaled nitric oxide include: 1. bronchoconstriction 2. pulmonary vasodilation 3. methemoglobinemia 4. formation of nitrogen dioxide

A patient has a pH of 7.58 and a PaCO2 of 50 torr. Based on these data, what is the primaryacid-base disturbance?

If you increase the oxygen input flow to a 28% air-entrainment mask from 5 to 7 L/min, what will be the oxygen concentration?

You must deliver the highest possible FIO2 to a 67-year-old man with pulmonary edema breathing at a rate of 24/min. Which of the following O2 delivery systems would be most appropriate?

A patient with COPD and hypercapnia is receiving oxygen via 35% venturi mask. He is      becoming increasingly somnolent, and an arterial blood gas analysis has been requested. The most appropriate immediate action would be to change to:

When checking a patient’s intermittent positive-pressure breathing (IPPB) breathing circuit before use, you notice that the device will not cycle off, even when you occlude the mouthpiece. What would be the most appropriate action in this case? 

A patient needs to be transported to the OR and a therapist obtains a oxygen E tank with 1300 psi. The patient is on oxygen via simple O2 mask at 10 LPM. How long will the tank last?

To measure PCO2, blood gas analyzers use what electrode? 

What is the usual method of monitoring the remaining contents in a liquid-filled cylinder?