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Test Code LA Lactate LAB95

Test Method

Colorimetric Endpoint Technique; Beckman DXC600


Specimen Requirement

0.2 mL of plasma is required.

Reference Values

0.5-2.0 mmol/L

  • Critical Value: > 3.9 mmol/L


Testing is performed Monday through Sunday.

Routine: Typically completed within 4 hours after the
specimen arrives at the testing site.

Expedite: Typically completed within 1 hour after the
specimen arrives at the testing site.

STAT: Typically completed within 30 minutes after the
specimen arrives at the testing site.

CPT Code Information

83605 Chemistry: Lactate (lactic acid)

LOINC Code Information

2524-7 Lactate [Moles/Volume] In Serum Or Plasma

Useful For

Diagnosing and monitoring patients with lactic acidosis.

Elevated levels of lactate are mainly found in conditions of
hypoxia such as shock, hypovolemia, and left ventricular failure;
in conditions associated with diseases such as diabetes mellitus,
neoplasia, and liver disease; and in conditions associated with
drugs or toxins such as ethanol, methanol, or salicylate. Lactic
acid measurements are being used as a screening tool in evaluating
for severe sepsis. In severe sepsis circulatory abnormalities
(intravascular volume depletion, peripheral vasodilatation,
myocardial depression and increased metabolism) lead to an
imbalance between systemic oxygen delivery and oxygen demand,
resulting in global tissue hypoxia or shock.

Additional Specimen Collection Information

Collect blood in sodium fluoride/potassium oxalate grey-top
tube. Chill the specimen immediately after collection by placing on
ice. Samples must be centrifuged within 15 minutes of collection
and assayed as they arrive in the testing laboratory. Plasma
separated from cells is stable at room up to 8
hours; refrigerated for up to 14 days and frozen for up
to 6 months.


Patients venipuntured immediately after or during the
administration of Metamizole (Dipyrone) may lead to falsely low
results for Lactate. Venipunture should be performed prior to the
administration of Metamizole.