USMLE Step 2 CK: Diagnosing Metabolic Acidosis with Anion
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What is the patient's blood pH indicating in this case? - The blood pH of 7.20
indicates metabolic acidosis.
What is the primary abnormality in the patient's lab profile? - A primary decrease
in HCO3- (bicarbonate) is noted.
What is the best next step in diagnosing this patient's acid-base status? - Calculate
the plasma anion gap.
How is the plasma anion gap calculated? - AG = Na+ - (HCO3- + Cl-).
What is the normal range for the anion gap? - The normal anion gap is between 6
and 12 mEq/L.
What does an increased anion gap indicate? - It indicates the presence of non-
chloride acids in the body.
Name a common cause of anionic gap metabolic acidosis related to hypoxia. -
Lactic acidosis.
What are the causes of ketoacidosis that can lead to anionic gap metabolic
acidosis? - Type I diabetes, starvation, or alcoholism.
Gap Calculation With complete solution– Expert Verified |
Latest Version | 100 Guaranteed Success
What is the patient's blood pH indicating in this case? - The blood pH of 7.20
indicates metabolic acidosis.
What is the primary abnormality in the patient's lab profile? - A primary decrease
in HCO3- (bicarbonate) is noted.
What is the best next step in diagnosing this patient's acid-base status? - Calculate
the plasma anion gap.
How is the plasma anion gap calculated? - AG = Na+ - (HCO3- + Cl-).
What is the normal range for the anion gap? - The normal anion gap is between 6
and 12 mEq/L.
What does an increased anion gap indicate? - It indicates the presence of non-
chloride acids in the body.
Name a common cause of anionic gap metabolic acidosis related to hypoxia. -
Lactic acidosis.
What are the causes of ketoacidosis that can lead to anionic gap metabolic
acidosis? - Type I diabetes, starvation, or alcoholism.