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Test Code COVBG BLD GAS, CORD, VENOUS

Additional Codes

LAB3173

Performing Laboratory

Porter Hospital Laboratory

Specimen Requirements

Specimen must arrive within 30 minutes of draw.
Specimen Type: Whole blood-Clotted blood is not acceptable.
Container/Tube: Heparinized blood gas syringe
Specimen Volume: 2 mL

Collection Instructions:
1. Draw arterial blood anaerobically.
2. Expel air bubbles, remove needle from syringe and cap-Air bubble is not acceptable.
3. Venous Samples from umbilical cord should be analyzed as soon as possible after collection.
4. Ideally, the sample should be tested within 15 minutes of collection. If this cannot be achieved, place on ice for up to 2 hours.

Test Schedule / Analytical Time / Test Priority / Turn Around Time

Daily / Immediately / Available STAT

Methodology

Instrument: RapidPoint 

pH               Potentiometric method using standard ionselective electrode (ISE) technology
pCO2          Modified potentiometric method based on the principle of the Severinghaus electrode
pO2           Amperometric measurement based on the principles of the Clark electrode

Test Classification and CPT Coding

82803

Normal Reference Values

Analyte

Venous

Units

pH

7.25-7.45

 

pO2

17-41

mmHg

pCO2

27-49

mmHg

HCO3

12-28

mmol/L

BE

(-)6 to (+)2

mmol/L

Reference

Tietz 5th ed (pH, pO2, pCO2) & Duke Medical Center Study (BE)

Critical Values

None currently established.