BLOOD GASES, VENOUS

Mnemonic

VBG

Synonym

VBG

Includes

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

Specimen Collection Requirements

Collect

Venous Whole Blood, one heparinized blood gas syringe

Handling

Collect 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 or with airspace. Specimens 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

Method

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

Referral Lab

Samaritan Health Services Laboratories

Reference Values

Reference Values

pH: 7.33-7.43
pO2: 25-43 mmHg
pCO2: 39-54 mmHg
O2 Sat: 60-85%
HCO3: 22-26 mmol/L
BE: -3 to 3
Age adjusted ranges.

Critical Values

pH: <7.22; >7.59
pCO2: <11 mmHg; >69 mmHg

CPT Codes

82803

Last Updated: Thursday, January 5, 2017 03:41:58 AM