Calculate Anion Gap
Also written as AG.
Calculate anion gap (AG).\nIn the face of a normal serum albumin, a high AG\n4.
What our notes say
- Calculate anion gap (AG).\nIn the face of a normal serum albumin, a high AG\n4. (Harrisons Pulmonary and Critical Care Medicine)
- Serum electrolytes: Na⁺, K⁺, Cl⁻, HCO₃⁻ — calculate anion gap (CRUSH COURSE YEAR 3 Semester 1 WORK (Part 1) — Revision Guide)
- Serum electrolytes (Na+, K+, Cl-) - to calculate anion gap and monitor electrolyte imbalances (Chemical Pathology Practice Examination: Essays — Past Paper)
Practice questions on Calculate Anion Gap
A patient's electrolytes: Na⁺ 140, K⁺ 4.2, Cl⁻ 102, HCO₃⁻ 8. Calculate anion gap (AG = Na - (Cl + HCO₃)). Which is the AG?
- 15 mmol/L
- 20 mmol/L
- 10 mmol/L
- 8 mmol/L
- 30 mmol/L
Answer: E. ** AG = 140 - (102 + 8) = 140 - 110 = 30 mmol/L. This is a markedly elevated anion gap (normal 8-12), indicating high anion gap metabolic acidosis from unmeasured anions like ketones, lactate, or toxins.