The nasal cannula is MOST appropriately used in the prehospital setting:
A. when the patient cannot tolerate a nonrebreathing mask.
B. if the patient's nasopharynx is obstructed by secretions.
C. if long-term supplemental oxygen administration is required.
D. when the patient breathes primarily through his or her mouth.
Answer: A. when the patient cannot tolerate a nonrebreathing mask.
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a. Fungal infections b. Viral infections c. Bacterial infections d. Parasitic infections
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