Annex D Prolonged Casualty Care (PCC) Practice Test

Bradypnea can be caused by which of the following?

Oversedation Hypothyroidism Fever Pain

Correct Answer:

Oversedation

Explanation:

Bradypnea is a slower-than-normal breathing rate. It is most often caused by oversedation from opioids or other sedatives that depress the brainstem’s respiratory drive, leading to slower and shallower breaths. That direct effect on the respiratory center makes oversedation the best explanation for a slowed breathing rate. Hypothyroidism can influence breathing indirectly but doesn’t typically produce a sudden, marked slowdown in respiration. Fever tends to increase, not decrease, the breathing rate as the body meets higher metabolic demand, and pain likewise often causes faster breathing due to stress and sympathetic activation.

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