Panic values
Chemistry panic values
Analyte SI units US units
Calcium < 1.65 mmol/L < 6.6 mg/dl
> 2.22 mmol/L > 12.9 mg/dl
Glucose < 2.60 mmol/L < 46 mg/dl
> 26.9 mmol/L > 484 mg/dl
K+ < 2.8 mmol/L < 2.8 mEq/L
> 6.2 mmol/L > 6.2 mEq/L
> 8.0 mmol/L if hemolyzed
Na+ < 120 mmol/L < 120 mEq/L
> 158 mmol/L > 158 mEq/L
CO2 in plasma < 11 mmol/L < 11 mMol
> 40 mmol/L > 40 mMol
Hematology, eg blasts or sickle cells on a peripheral smear, possibly indicating leukemia or sickle cell anemia
Microbiology, eg positive gram stain or culture from blood, serosal fluids or CSF, acid-fast stain or positive mycobacterial culture results
Transfusion medicine Incompatible cross-match and positive serology for VDRL; the panic values differ in each lab and the route of the communication is at the discretion
of the lab director
Critical values in the laboratory
Chemistry
Analyte SI units US units
Calcium < 1.65 mmol/L < 6.6 mg/dl
> 2.22 mmol/L > 12.9 mg/dl
Glucose < 2.60 mmol/L < 46 mg/dl
> 26.9 mmol/L > 484 mg/dl
K+ < 2.8 mmol/L < 2.8 mEq/L
> 6.2 mmol/L > 6.2 mEq/L
> 8.0 mmol/L if hemolyzed
Na+ < 120 mmol/L < 120 mEq/L
> 158 mmol/L > 158 mEq/L
CO2 –plasma < 11 mmol/L < 11 mMol
> 40 mmol/L > 40 mMol
Hematology, eg blasts or sickle cells on peripheral smear, may indicate leukemia or sickle cell anemia
Microbiology, eg positive gram stain or culture from blood, serosal fluids or CSF, acid-fast stain or positive mycobacterial culture results
Transfusion medicine Incompatible cross-match, positive VDRL