Test Code RTCVGP Blood Gases, Cord Blood, Venous
Specimen and Container/Tube
Blood Gases, Umbilical Cord Blood, Venous
Rejection Criteria
Cord blood is considered a precious body fluid. If a misidentified cord blood is received in the laboratory, the technical staff will call the point of origin and require that the individual responsible for the specimen collection/specimen labeling (or, in their absence, the ordering or other responsible physician) come to the Rapid Response Laboratory and complete the following:
a.Label the specimen properly (and provide a correct requisition)
b.Fill out and sign a correction form.
Misidentified cord blood gas specimens will be analyzed upon receipt, but results will not be released until the proper identification process has been completed.
Turnaround Time
20 minutes
Specimen Type
Blood Gases, Umbilical Cord Blood, Venous
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 905 or hand deliver to Blood Gas Area located in the Clinical Chemistry Laboratory (TW008)
STAT Turnaround Time
20 minutes
Critical Results
pH <7.00
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: 7.22-7.44
PCO2: 30-63 mmHg
PO2: 12-43 mmHg
HCO3-: 20-28 mmol/L
Base Excess: 6 +2
SO2: 23-100%
Hemoglobin: 11.4-19.0 g/dL
Oxyhemoglobin: 23.0-94.0%
Deoxyhemoglobin: 0.0-76.0%
Carboxyhemoglobin:<7.3%
Methemoglobin: <1.4%
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