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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