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Arterial Blood Gas, Umbilicial
MessagePerforming Lab: Hudson, Lakeview, Regions, Westfields
Test Code
4737
Alias/See Also
Sunquest: UABG
CPT Codes
82803
Includes
Arterial Umbilical pH; umbilical pCO2; umbilical pO2; umbilical bicarb (HCO3); umbilical O2 saturation; umbilical base excess; umbilical base defecit
Preferred Specimen
1.0 mL Heparinized Arterial Blood (Blood Gas Syringe)
Minimum Volume
0.5 mL
Instructions
Samples should be free of air bubbles, received on ice slush and run immediately. (Exceptions to the ice slush are samples received , as long as they are received within 30 minutes of collection.)
Hudson: Specimens should be walked directly to the laboratory
Hudson: Specimens should be walked directly to the laboratory
Transport Container
Blood Gas Syringe
Transport Temperature
Ice Slush
Specimen Stability
Ice Slush: 1 hour
Room Temperature: 30 minutes
Room Temperature: 30 minutes
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Room Temperature >30 minutes
Methodology
Electrode
Setup Schedule
Daily
Report Available
Same Day
Reference Range
| Umbilical (Cord blood) reference ranges: | |||
| Analyte | Specimen Type | Reference Range | Critical Value |
| pH | Arterial | 7.15 - 7.43 | ≤7.200 or ≥7.500 |
| Venous | 7.26 - 7.49 | ||
| pCO2 | Arterial | 31.1-74.3 mmHg | |
| Venous | 23.2-51.7 mmHg | ||
| pO2 | Arterial | 15.0-33.8 mmHg | |
| Venous | 15.4-48.2 mmHg | ||
| Bicarbonate | Arterial | 13.3-27.5 mmol/L | |
| Venous | 16.3-24.9 mmol/L | ||
| O2 Saturation | Arterial | 7.1-42.1 % | |
| Venous | 29.4-66.3 % | ||
Clinical Significance
umbilical cord blood gas analysis may assist with clinical management and excludes the diagnosis of birth asphyxia in approximately 80% of depressed newborns at term
