In metabolic acidosis, which ABG pattern is expected?

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Multiple Choice

In metabolic acidosis, which ABG pattern is expected?

Explanation:
Metabolic acidosis presents with a primary drop in bicarbonate, which lowers the blood pH. The body's strongest compensatory response is to hyperventilate, blowing off CO2 to raise the pH toward normal. So the ABG pattern you’d expect shows an acidic pH, a reduced bicarbonate level, and a decreased PaCO2 due to respiratory compensation. This matches the pattern of low pH, low HCO3-, and a compensatory low PaCO2, rather than a normal or high pH with normal or high bicarbonate, or a low PaCO2 alone which would indicate a respiratory process rather than metabolic acidosis.

Metabolic acidosis presents with a primary drop in bicarbonate, which lowers the blood pH. The body's strongest compensatory response is to hyperventilate, blowing off CO2 to raise the pH toward normal. So the ABG pattern you’d expect shows an acidic pH, a reduced bicarbonate level, and a decreased PaCO2 due to respiratory compensation. This matches the pattern of low pH, low HCO3-, and a compensatory low PaCO2, rather than a normal or high pH with normal or high bicarbonate, or a low PaCO2 alone which would indicate a respiratory process rather than metabolic acidosis.

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