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* BLOOD GASES, ARTERIAL

Mnemonic

ABG

Synonym

ABG - HCO3 - Bicarbonate

Includes

pH, O2, HCO3, pO2, pCO2, Base Excess (BE)

Specimen Collection Requirements

Collect

Arterial Whole Blood, one heparinized blood gas syringe

Handling

Collect specimen anaerobically. Blood gas syringe should be capped with no air space.

Minimum Volume

1.0 mL

Transport

Refrigerated (2-8°C), transport immediately

Rejection Criteria

Specimens with syringe uncapped, with airspace, collected in tubes with benzalkonium heparin, EDTA, citrate, oxalate and fluoride

Stability

Ambient (20-25°C): 30 minutes; Refrigerated (2-8°C): 30 minutes; Frozen (at or below -20°C): Unacceptable

Testing Information

Performed

7 days/week

Reported

1 hour

Method

Ion selective electrode (ISE), Co-oximetry, Colorimetry

Reference Values

Reference Values

pH:                              7.35-7.45
pO2 (0 - 59 years):     80-100 mmHg
pO2 (≥60 years):        75-85 mmHg
pCO2:                         34-46 mmHg
O2 Sat:                        94-99%
HCO3:                         22-26 mmol/L
BE:                               -3 to 3
Age adjusted ranges.

Critical Values

pH:        <7.22; >7.59
pO2:       <51 mmHg
pCO2:     <21 mmHg; >69 mmHg
O2 Sat:     <76 %

CPT Codes

82803

Last Updated: Thursday, January 5, 2017 03:40:35 AM


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