Arterial blood gas analysis of a patient reveals-pH 7.2, HCO3 36 mmol/L pCO2 60 mm of Hg. The abnormality is –
**Arterial Blood Gas Analysis Explanation**
### Core Concept
The patient's arterial blood gas (ABG) analysis reveals a mixed acid-base disorder, characterized by a decrease in pH (acidemia), elevated bicarbonate (HCO3) levels, and a normal to slightly elevated pCO2. This scenario suggests a complex interplay between respiratory and metabolic disturbances.
### Why the Correct Answer is Right
The patient's ABG profile indicates a respiratory acidosis component (elevated pCO2) and a metabolic alkalosis component (elevated HCO3). The pH of 7.2 is acidic, indicating an overall acid-base imbalance. The elevated HCO3 levels suggest a metabolic component, possibly due to excessive bicarbonate administration or gastrointestinal bicarbonate loss. The normal to slightly elevated pCO2 suggests a concomitant respiratory acidosis, potentially due to hypoventilation.
### Why Each Wrong Option is Incorrect
**Option A:** This option is not provided.
**Option B:** This option is not provided.
**Option C:** This option is not provided.
**Option D:** This option is not provided, as the correct answer is not listed.
### Clinical Pearl / High-Yield Fact
When interpreting ABG results, remember the "Diamond Rule": a decrease in pH (acidemia) is associated with a decrease in bicarbonate (HCO3) and/or an increase in pCO2, or an increase in both. In this case, the elevated HCO3 and normal to slightly elevated pCO2 suggest a mixed disorder.
### Correct Answer Line
Correct Answer: .