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* LACTATE

Mnemonic

LACT

Synonym

Lactic Acid

Specimen Collection Requirements

Patient Preparation

The patient should be at rest before taking the sample. In particular, movement of the hand or arm should be avoided. Avoid the use of a tourniquet, if possible.

Collect

Plasma, one 2.0 or 4.0 mL gray (sodium fluoride/ potassium oxalate) top tube, or one gray top microtainer

Handling

Centrifuge and separate plasma from cells ASAP, preferably within 15 minutes of collection. Use a refrigerated (2-8°C) centrifuge, if available.

HOSPITAL PATIENTS: The tube of whole blood is immediately placed on wet ice and delivered to the lab within 15 minutes of collection for processing.

Preferred Volume

1.0 mL Plasma

Minimum Volume

0.25 mL Plasma (Whole Blood 0.60 mL minimum draw)

Transport

Frozen (≤ -20°C)

Rejection Criteria

Grossly hemolyzed specimens, green top (lithium heparin) tubes

Stability

AFTER SEPARATION FROM CELLS: Ambient (18-26 °C): 8 hours; Refrigerated (2-8°C): 14 days; Frozen (< -20°C): 1 month

Testing Information

Performed

7 days/week

Reported

24 hours

Method

Enzymatic/Colorimetric

Reference Values

Reference Values

Critical Values

For critical age related ranges see Chemistry Age Related Reference Ranges and Critical Values.

Comments

Assay interference (negative) may be observed when high concentrations of N-acetylcysteine (NAC) are present.

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

CPT Codes

83605

Last Updated: Thursday, January 5, 2017 03:41:20 AM


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