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Test Code LAB79 Blood Gas, Venous, Blood

Performing Laboratory

Barnes-Jewish Hospital Laboratory

Methodology

Amperometric and Potentiometric

Includes Base Excess, HCO3 (calculated), O2 Sat (measured), pCO2, pH, and pO2.

Literature References:

1. Reference manual: ABL 800 Series.  Radiometer America, Bronshoj Denmark, 2009.

2. Scott MG, Klutts JS. Physiology and disorders of water electrolyte, and acid-base metabolism. In: Tietz textbook of clinical chemistry. 4th ed. Elsevier Saunders Co, 2005:1747-76.

Specimen Requirements

Hospital Patient:

Specimen Type: Whole blood, heparinized venous

Container/Tube: Sims-Portex blood gas syringe

Specimen Volume: Full tube

 

Additional Information:

1. Send capped syringe (no needle attached) to the laboratory.
2. Indicate O2 (FIO2) on label or request form.
3. If sending by dispatch, place labeled syringe in a container with wet ice. Specimen must be received in the laboratory within 60 minutes of draw.

4. If sending at ambient temperature, specimen must be received in the laboratory within 30 minutes of draw.
5. High white cell count may falsely lower pH and pO2.


Non Hospital Patient:
Call Barnes-Jewish Hospital Laboratory Customer Service at 314-362-1470 prior to collection to schedule a STAT pick-up.

 

Specimen Type: Whole blood, heparinized venous

Container/Tube: Sims-Portex blood gas syringe

Specimen Volume: Full tube

 

Additional Information:

1. Send capped syringe (no needle attached) to the laboratory.
2. Indicate O2 (FIO2) on label or request form.
3. If sending by courier, place labeled syringe in a container with wet ice. Specimen must be received in the laboratory within 60 minutes of draw.
4. High white cell count may falsely lower pH and pO2.

Day(s) Test Set Up

Monday through Sunday
Turnaround Time:
STAT: 15 minutes after receipt in laboratory 
Routine: not available

Test Classification and CPT Coding

82803

Reference Values

HCO3 (CALCULATED) 

20-30 mmol/L
Critical result (automatic call-back): ≤10 mmol/L

or ≥45 mmol/L

pCO2

40 - 50 mm Hg

Critical result (automatic call-back): ≤ 15 mm Hg

or ≥75 mm Hg

pH

7.32 - 7.43

Critical result (automatic call-back): ≤7.20 or ≥7.60
pO2

No established reference intervals
 

Literature Reference:

Scott MG, Klutts JS. Electrolytes and blood gases. In: Tietz textbook of clinical chemistry. 4th ed. Elsevier Saunders Co., 2006;983-1018.

Specimen Transport Temperature

Refrigerate <60 minutes/Ambient <30 minutes OK

Additional Information

For BJH Laboratory Use Only
Analyte Stability:

See Analyte Stability Chart under General Information for a complete list.

Laboratory Processing Instructions:

Test performed in BJH Core Lab. Deliver to the blood gas workstation immediately.

LOINC Code Information

Name LOINC Code
pCO2 2021-4
pH 2746-6
pO2 2705-2