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HelpTest Code ACBG Arterial Cord Blood Gases
Additional Codes
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Cerner |
NextGen |
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Blood Gases Cord Arterial |
Blood Gases Cord Arterial |
Useful For
Blood gas measurements help to evaluate oxygenation and acid base status.
- pH, pCO2, HCO3–, TCO2, Base Excess and Base Deficit, define acid-base status.
- pO2 and O2 Content indicates oxygen.
- CO-oximetry evaluates the ability of the blood to carry oxygen by measuring total hemoglobin and the percentage of functional and dysfunctional hemoglobin species.
- Oxyhemoglobin (O2Hb) [OSAT]: The proportion of Hb that is oxygen-loaded.
Methodology
- Potentiometric
- pH
- pCO2
- Amperometric
- pO2
- Calculated
- HCO3
- Base Excess
- 02 Saturation
Patient Preparation
None
Collection Instructions
- Specimens should be collected according to clinical policies and procedures.
- Arterial Blood Gas specimens drawn in plastic syringes should not be iced, they should be kept at room temperature and analyzed within 30 minutes of collection (Per NCCLS C46-A, Vol. 21 No.14, Sect 4.2.1.).
Specimen Requirements
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Minimum Volume |
150 µL |
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Container |
Heparinized Syringe free of air bubbles |
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Stability |
Within 30 minutes of collection |
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Rejection Criteria |
The Laboratory will not accept specimens in syringes with needles -- the syringe must be capped with a rubber stopper. |
Result Reporting and Reference Values
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TEST |
UNITS |
REFERENCE RANGE |
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pH Cord Arterial |
pH units |
7.18 |
-- |
7.38 |
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pCO2 Cord Arterial |
mmHG |
41 |
-- |
57 |
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pO2 Cord Arterial |
mmHG |
5 |
-- |
30 |
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HCO3 Cord Arterial |
mEq/L |
20 |
-- |
25 |
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BASE EXCESS Cord Arterial |
mmol/L |
-10 |
-- |
-2 |
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Reflex Testing
None
Limitations
- Air bubbles must be removed from the sample immediately. Contamination with room air will affect results.
- If a patient is on room air and pO2 + pCO2 is greater than 150 mmHg the laboratory will call and recommend the ABG be redrawn due to possible contamination.
- Clotting and dilutional effects may be present if the sample collection technique is not performed correctly.
- The presence of unknown interfering substances, clots or other foreign matter within the blood sample that alters the optical spectrum will result in higher levels of residual spectrum. A sample with an absorbance error will not be reported.
- Anticoagulants such as EDTA, citrate, oxalate, or fluoride will not be accepted since they significantly affect pH and Ionized Calcium.
- The substances listed below showed an interference with CO-Oximetry/tBili analytes causing a clinically significant error (> TEa).