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Test Code BG2 Venous Blood Gas

Synonym

  • GASV5

Profile Information

Reporting Name Available Separately Always Reported
pH, Venous No Yes
pCO2, Venous No Yes
pO2, Venous No Yes
HCO3, Venous No Yes
O2 Saturation, Venous No Yes
Base Excess No Yes

Specimen Required

Preferred Container/Tube: Dry Lithium Heparin Syringe
Acceptable Container/Tube: Dry Lithium Heparin Syringe
Specimen Volume: Full syringe
Specimen Minimum Volume: Full syringe

Specimen Stability Information

Ambient: 30 minutes

Rejected Due To

  • Unacceptable container type
  • Quantity not sufficient
  • Clotted specimens
  • Frozen specimens
  • Received >30 minutes from collection time

Reference Values

pH, Venous
7.32-7.43

 

pCO2, Venous
36-52 mm Hg

 

PO2, Venous

Venous pO2 is not recommended for the evaluation of oxygen status, clinical correlation is recommended.

 

HCO3, Venous
22-29 mmol/L

 

sO2, Venous

Venous sO₂ lacks a defined reference range due to wide physiologic variability; please interpret clinically.

 

Base Excess
-3.0-3.0 mmol/L

Cautions

pH: Contamination of sample with ambient air will falsely increase the pH.

Method Description

pO2: Amperometry

pH, pCO2: Potentiometry

Base excess: HCO3- - 24.8 + 16.2 x (pH - 7.4)

HCO3: Log (HCO₃ (c)) =   pH + log(pCO₂) – 7.608 mmol/L

sO2: Oximetry

Performing Lab

Clinical Lab UH
Clinical Lab West Campus
Respiratory Therapy East
Respiratory Therapy UH

Day(s) Performed

Monday through Sunday

Reporting Name

Venous Blood Gas

CPT Code Information

82805

LOINC Code Information

11556-8

11558-4
11557-6
11556-8
1959-6
2713-6
11555-0