Test Overview
Test Methodology

Abbott I-Stat - ion selective potentiometry

Test Usage

pH, pCO2, pO2 measurements are used in the diagnosis, monitoring, and treatment of respiratory disturbances and metabolic and respiratory-based acid-base disturbances.

Reference Range *

Reference ranges are available in the iSTAT CG4+ Blood Gas and Lactate test procedure located on the POC website: https://www.pathology.med.umich.edu/point-of-care.

Reference ranges may change over time. Please refer to the original patient report when evaluating results.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Limitations

Results may be affected in the following situations: hemolysis, traumatic draw, pumping fist during draw, extended delay between drawing and testing specimen, exposure to air when measuring blood gases, and obtaining specimen from an arm with an IV.

Test Details
Analytic Time

2 minutes

Soft Order Code
GASPV
MiChart Code
POC Venous BG, I-Stat
Synonyms
    Laboratory
    Point of Care
    Section
    Point of Care
    Specimen Requirements
    Special Handling

    Samples collected without anticoagulant must be tested immediately, within 3 minutes of draw time. Samples collected in anticoagulant must be tested within 10 minutes of draw time. Expel air bubbles and thoroughly mix syringe samples for >30 seconds by repeatedly inverting and rolling syringe immediately after sample collection.

    Normal Volume
    3 mL whole blood
    Minimum Volume
    95 µL whole blood
    Rejection Criteria
    Specimens; older than 30 minutes, containing bubbles, having prolonged exposure to room air, clotted, and/or grossly hemolyzed.
    Additional Information

    For more test specific information, please refer to the test procedure found on the Michigan Medicine POC website: https://www.pathology.med.umich.edu/point-of-care

    Billing
    CPT Code
    82803
    LOINC
    24339-4
    NY State Approved
    No