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Arterial Blood Gas Co-Oximetry
Test CodeCOOX
CPT Codes
85018, 82375
Preferred Specimen
1 mL whole blood in Lithium heparin blood gas syringe
Minimum Volume
0.5 mL whole blood in Lithium heparin blood gas syringe
Other Acceptable Specimens
None
Instructions
Specimen must arrive within 1 hour of draw.
• Cap syringe(s) tightly, remove any air bubbles. Send ambient.
• If there is a delay in transport >30 minutes, send specimen on crushed ice.
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Cancel and request a redraw if >30 min at Room Temp and no Ice. Cancel and request a redraw >1 Hour at 0-4C.
Methodology
Spectrophotometry, Calculation
Setup Schedule
Monday through Sunday; Continuously
Report Available
Same day
Reference Range
• Total Hemoglobin
o Male:
VBG: 0 – 2 Weeks: 14.5 – 22.5 g/dL
VBG: 2 Wks – 1 Mo: 10.0 – 18.0 g/dL
VBG: 1 Mo – 2 Yrs: 9.5 – 14.0 g/dL
VBG: 2 – 10 Yrs: 11.5 – 14.5 g/dL
VBG: 10 – 18 Yrs: 13.0 – 16.0 g/dL
VBG: 18 – 150 Yrs: 13.5 – 17.0 g/dL
o Female:
VBG: 0 – 2 Weeks: 14.5 – 22.5 g/dL
VBG: 2 Wks – 1 Mo: 10.0 – 18.0 g/dL
VBG: 1 Mo – 2 Yrs: 9.5 – 14.0 g/dL
VBG: 2 – 10 Yrs: 11.5 – 14.5 g/dL
VBG: 10 – 18 Yrs: 12.0 – 15.0 g/dL
VBG: 18 – 150 Yrs: 12.0 – 16.0 g/dL
Critical value (automatic call-back): <6.1 g/dL
• Oxyhemoglobin
o VBG: 60 – 80 %
• Methemoglobin
o VBG: 0.0 – 1.9%
Critical value (automatic call-back): >10.0%
• Carboxyhemoglobin
o VBG: 0.0 – 1.5%
Critical value (automatic call-back): >10.0%
Clinical Significance
The Arterial Blood Gas test is used to evaluate respiratory diseases and conditions that affect the lungs. It helps determine the effectiveness of oxygen therapy. The test also provides information about the body's acid/base balance, which can reveal important clues about lung and kidney function and the body's general metabolic state. This is the physical and chemical processes in the body that convert or use energy.
Performing Laboratory
NCMC & BFCMC
