Biomarker Lens

Common biomarkers

  • Hemoglobin
  • Glucose
  • ALT
  • Apolipoprotein B
  • C-Reactive Protein, Cardiac
  • Ferritin
  • Alb/Creat Ratio, Urine
  • Alkaline Phosphatase
  • FSH
  • T4,Free(Direct)

Biomarkers · Chemical

Lactic Acid, Plasma

This test measures the level of lactate, also called lactic acid, in a sample of your blood. In certain cases, cerebrospinal fluid (CSF) may be used.

Lactate Test, MedlinePlus, National Library of Medicine

Primary unit
mg/dL
LOINC codes
14118-4
Tests that measure Lactic Acid, Plasma
Labcorp 1, Quest Diagnostics 1

Tests

Check the catalog code, specimen, method and preparation for every test that measures Lactic Acid, Plasma. Select up to five tests to compare them side by side.

Labcorp 1 test

Single-analyte tests

  • Lactic Acid, Plasma 004770

    Plasma · Fasting not stated · Turnaround 1 - 3 days

    Method and collection
    Method
    Lactate−pyruvate; spectrophotometry
    Preparation
    Patient should not be on any intravenous infusion that would affect the acid-base balance. Patient should be in a fasting and resting state (should not exercise).
    Collection
    Keep gray-top tube on ice. Draw blood in gray-top tube. Mix well by gentle inversion at least six times. Return to ice bath to cool. Avoid hand-clenching and, if possible, avoid use of a tourniquet. A tourniquet with patient clenching and unclenching hand will lead to high potassium and lactic acid buildup from the hand muscles, and pH will decrease. It is best to avoid a tourniquet for electrolytes and lactic acid or to release it after blood begins to flow into the tube. If the tourniquet is released before blood is drawn, wait about a minute before drawing. Within 15 minutes of draw, separate the plasma from blood by centrifugation for 10 minutes. Immediately transfer the plasma portion of the sample to a labeled plastic transport tube. Avoid excessive forces that contribute to hemolysis.
    Reference notes
    See table. Age Range (mg/dL) 0 to 7 d 4.5−19.2 8 to 30 d 9.6−35.0 1 to 6 m 8.4−41.3 7 m to 5 y 6.3−33.0 ≥6 y 4.8−25.7
    Labcorp catalog page

Quest Diagnostics 1 test

Single-analyte tests

  • Lactic Acid, Plasma 585

    Plasma · Fasting not stated · Turnaround Set up: Mon-Fri; Report available: 5 days

    Method and collection
    Method
    Colorimetric
    Preparation
    Sample should be collected without the use of a tourniquet; avoid hand-clenching. If a tourniquet has been used, it should be released for one minute prior to drawing blood. Collected blood should be cooled on ice immediately and separated from the cells within 3 hours.
    Collection
    The collected blood should be well-mixed and separated from the cells within 3 hours. Freeze plasma and ship frozen. The assay manufacturer, Roche, notes that N-acetylcysteine, when administered in high concentrations (such as for treatment of acetaminophen overdose), can interfere with their assay for Lactate (Lactic Acid), leading to falsely low results.
    Reference notes
    0.4-1.8 mmol/L
    Quest Diagnostics catalog page

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Sources

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Lab catalogs

Reference sources

Codes and registries

Verify these ranges and sources

We compile this page from named laboratory catalogs, guidelines and studies. Labs calculate reference intervals from the people they test, for one assay method and one population group, so an interval describes that population rather than an optimal target.

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