Which symptom is a client with high-altitude pulmonary edema most likely to exhibit first?
1. Change in the level of consciousness
2. Polycythemia
3. Vasoconstriction
4. Vasodilation
Change in the level of consciousness
Rationale: High-altitude pulmonary edema results from the decrease in atmospheric pressure and lower level of oxygen in the air at high altitudes. This results in hypoxemia, which will cause both fatigue and a change in the level of consciousness. Polycythemia is a compensatory mechanism, as more red blood cells are formed to try to get more oxygen to the cells. Vasoconstriction occurs before vasodilation, but both are compensatory mechanisms occurring later than the initial change in level of consciousness.
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