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Test Code 1515 Lactic Acid, Plasma

Performing Laboratory

Barnes-Jewish Hospital Laboratory


Enzymatic (Lactate to Pyruvate)

Literature Reference:

Package insert: Lactate LACT2 reagent. Roche Corporation, 2/2015.

Specimen Requirements

Specimen must be received within 2 hours of draw.


Specimen Type: Plasma
Container/Tube: Grey top (potassium oxalate/sodium fluoride)
Specimen Volume: Full tube

Collection Instructions:
1. Avoid use of a tourniquet if possible.

2. Blood should be drawn from a stasis-free vein, however, minimal hemostasis (<30 seconds) will not affect lactate levels.

Additional Information: Delivery of specimen on ice is not required. For Hospital patients, the pneumatic tube system may be used.

Day(s) Test Set Up

Monday through Sunday

Turnaround Time:
STAT: 1 hour after receipt in laboratory 
Routine: 2 to 4 hours after receipt in laboratory

Reference Values

0.7-2.2 mmol/L

Critical result (automatic call-back): ≥4.0 mmol/L

Literature Reference:

1. Tietz, Burtis CA, Ashwood ER, Bruns DE eds: Textbook of Clinical Chemistry and Molecular Diagnostics 5th ed: Chapter 49, p. 1609, Elsevier, St. Louis, MO 2012.

2. Singer M., et al.  The Third International Consensus Definition for Sepsis and Septic Shock.  JAMA 2016; 315(8): 801.

Test Classification and CPT Coding


Additional Information

For BJH Laboratory Use Only
Analyte Stability:

See Analyte Stability Chart in Special Instructions.

Laboratory Processing Instructions:

Test performed in BJH Core Lab.  Processed by automated line for delivery to the Cobas 8000.

LOINC Code Information

Name LOINC Code
Lactate 2524-7


Specimen Transport Temperature


Special Instructions