When Given High Concentrations of Oxygen, a Patient with Chronic $\dot { V }$

question 14

Multiple Choice

When given high concentrations of oxygen, a patient with chronic hypercapnia may develop a more serious respiratory acidosis. Which of the following might be contributing to the patient's increased PCO₂?
I.worsening ventilation-perfusion ( $\dot { V }$ / $\dot { Q }$ ) balance
II.desensitization of the carotid bodies
III.removal of the hypoxic stimulus

• A)I and II
• B)I only
• C)I and III
• D)I, II, and III

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