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Test Code LAB0230214 Blood Gases, Venous

Methodology

Electrode Methodology
Includes pH, pCO2, pO2, bicarbonate (HCO3), base excess, and % O2 saturation.

Performing Laboratory

CentraCare Laboratory Services

Specimen Requirements

Specimen Type: Venous blood

Container/Tube:  

Preferred: SodiumHeparin

Acceptable:  Lithium Heparin

Note:  Samples cannot be collected in microtainers.  No capillary blood samples.

Collection Instructions:

1.  Avoid exposure of specimen to atmosphere.

2. Hand deliver sample to CCLS lab.  Do not send in tube station.

 

Specimen Transport Temperature

Ambient

Reference Values

pH: 7.31-7.41 units
Critical values (automatic call-back): ≤7.25 units or ≥7.60 units


pCO2: 41-51 mm Hg
Critical values (automatic call-back): ≤20 mm Hg or ≥70 mm Hg


pO2: 30--40 mm Hg
Critical value (automatic call-back): <30   or > 40 mm Hg


HCO3: 23-28 mmol/L
Critical values (automatic call-back): ≤14 mmol/L or ≥40 mmol/L

 

Base excess: -2.0 to 3.0 mmol/L
% O2 saturation: 60-80%

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding

82803