2nd October 2019

merckmanuals
14

What causes an anion gap?

Metabolic acidoses are categorized as high or normal anion gap based on the presence or absence of unmeasured anions in serum. Causes include accumulation of ketones and lactic acid, renal failure, and drug or toxin ingestion (high anion gap) and GI or renal HCO3 loss (normal anion gap).

How does Hypoalbuminemia cause low anion gap?

Low anion gap. A low anion gap is frequently caused by hypoalbuminemia. Albumin is a negatively charged protein and its loss from the serum results in the retention of other negatively charged ions such as chloride and bicarbonate.
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