pH is 7.2, pO2 is 46, pCO2 of 80 are indicative of
**Core Concept**
The given arterial blood gas (ABG) values indicate a disturbance in the acid-base balance and respiratory function. The pH of 7.2 is acidic, suggesting acidosis, while the pCO2 of 80 is elevated, indicating hypercapnia or respiratory acidosis. The pO2 of 46 is low, but not critical, suggesting some degree of hypoxemia.
**Why the Correct Answer is Right**
In respiratory acidosis, the primary issue is the retention of CO2, leading to an increase in hydrogen ions (H+) and a decrease in bicarbonate (HCO3-). The elevated pCO2 (80 mmHg) is indicative of hypoventilation or respiratory muscle weakness, causing CO2 to accumulate in the blood. The low pH (7.2) confirms the presence of acidosis. The low pO2 (46 mmHg) may be secondary to hypoventilation, which impairs gas exchange in the lungs.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not relevant to the given ABG values, which indicate respiratory acidosis, not metabolic acidosis.
**Option B:** This option is incorrect because the primary issue in the given scenario is respiratory acidosis, not diabetic ketoacidosis (DKA).
**Option C:** This option is incorrect because the given ABG values do not indicate a primary issue with cardiac function or myocardial infarction (MI).
**Clinical Pearl / High-Yield Fact**
In patients with chronic obstructive pulmonary disease (COPD), hypoventilation can lead to respiratory acidosis, which may be exacerbated by the use of sedatives or anxiolytics.
**Correct Answer:** D. Respiratory acidosis with possible hypoxemia