A 63-Year-Old Man with Markedly Increased Whole Blood Lactate and Discrepant Plasma Lactate Values

A 63-year-old man with altered mental status, septic shock, acute pancreatitis, and meningitis was admitted to the intensive care unit. The patient's anion gap was 24 mmol/L [reference interval (RI), 2–14 mmol/L]. Whole blood lactate was 18 mmol/L (RI, 0.7–2.0 mmol/L), as measured on a Radiometer ABL800 blood gas analyzer. Because the upper analytic measurement range of the ABL800 lactate method is 15 mmol/L, the same sample was repeated on the Roche …