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Carbon Dioxide, Total

Carbon Dioxide, Total CPT: 82374

Synonyms

CO₂

TCO₂

Special Instructions

Maintain specimen in a tightly-stoppered tube.

Expected Turnaround Time

Within 1 day

Specimen Requirements

Specimen

Serum (preferred) or plasma

Volume

1 mL

Minimum Volume

0.5 mL (Note: This volume does not allow for repeat testing.)

Container

Gel-barrier tube (send entire tube) is preferred; red-top tube or green-top (heparin) tube is acceptable if centrifuged within 45 minutes and the serum or plasma is removed and placed in a tightly-stoppered secondary tube.

Collection

Draw blood in gel-barrier tube and centrifuge. If red-top tube or green-top tube is used, centrifuge within 45 minutes of draw, remove the serum or plasma, and place in a transport tube and tightly stopper the tube.

Storage Instructions

Room temperature

Stability Requirements

Temperature Period
Room Temperature 14 days
Refrigerated 14 days
Frozen 14 days
Freeze/thaw/ cycles Stable x 3

Patient Information

As part of an electrolyte panel to identify or monitor an electrolyte imbalance or acid-base (pH) imbalance

During a routine physical or as recommended by your healthcare practitioner if you are experiencing symptoms such as weakness, confusion, prolonged vomiting, or breathing problems that could indicate an electrolyte imbalance or an acid-base imbalance (commonly described as acidosis or alkalosis)

A blood sample drawn from a vein in your arm.