NCLEX Practice Test RN Practice Question
A client with COPD is in respiratory failure. Which of the following results would be the most sensitive indicator that the client requires a mechanical ventilator?
Correct Answer: C
Rationale: A pH of 7.23 indicates severe respiratory acidosis, suggesting inadequate ventilation and the need for mechanical ventilation. PCO2 58 (A) and HCO3 30 (D) are elevated but less critical, and SaO2 90 (B) is low but not definitive.
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