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HelpTest Code RTVGAS Blood Gases, Venous
Specimen and Container/Tube
Blood, Venous
Turnaround Time
15 minutes
Specimen Type
Blood, Venous
STAT Turnaround Time
15 minutes
Fee Code
Adults 24245
Pediatrics 24419
UCMC Collection Instructions
- Remove air.
- Remove needle from syringe.
- Cap tightly and mix well. Mix horizontally for 15 seconds
- No ice.
- Route the specimen and requisition to the Rapid Response Lab tube station 196 or hand deliver to Rapid Response Lab room TW005
Critical Results
pH: <7.20 or >7.60
PCO2: <20 or >70 mmHg
Hemoglobin: <6.0 g/dL
Carboxyhemoglobin: >20%
Methemoglobin: >10%
Container/Tube
Balanced heparinized syringe
Specimen Minimum Volume
0.5 mL
Day(s) Performed
24/7
STAT DAY(S) AND TIME(S) PERFORMED
Available
CPT
82805
Method Name
Potentiometry: pH, pCO2
Amperometry: pO2
Derived: HCO3-, base excess
Optical (CO-oximetry): SO2, hemoglobin, oxyhemoglobin, deoxyhemoglobin, carboxyhemoglobin, methemoglobin
Reference Values
pH: 7.33-7.43
PCO2: 40-50 mmHg
PO2: 30-40 mmHg
HCO3-: 22-29
mmol/L
Base Excess: -3-3
SO2: 60-80%
Hemoglobin: 12.0-18.0
g/dL
Oxyhemoglobin:
58.0-79.0%
Deoxyhemoglobin:
20.0-38.0%
Carboxyhemoglobin:<
3.0%
Methemoglobin: <2.0%
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Additional Information
For SO2: “Measured oxygen saturation of functional hemoglobin
according to the following formula. OxyHb/(OxyHb + DeoxyHb).”
For OxyHb: “Measured oxygen saturation of total hemoglobin
according to the following formula. OxyHb/(OxyHb + DeoxyHb + COHb +
MetHb).”
Pediatric Volume
0.5 mL
Methodology
Potentiometry: pH,
pCO2
Amperometry: pO2
Derived: HCO3-, base
excess
Optical (CO-oximetry): SO2, hemoglobin, oxyhemoglobin,
deoxyhemoglobin, carboxyhemoglobin, methemoglobin