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| 30540:CARBON DIOXIDE (CO2) | |||||||||
| Alias Names: | Bicarbonate / CO2 content | ||||||||
| Methodology: | pH Rate of Change | ||||||||
| Edit Date: | 6/11/2010 | ||||||||
| Performed: | Daily | ||||||||
| Released: | Same day as tested | ||||||||
| CPT Code: | 82374 | ||||||||
| Specimen Collection Details | |||||||||
| Collection: | One 7.5 mL serum separator tube (SST). Also acceptable: One 4 mL green top tube (heparin) or one 4.5 mL plasma separator tube (PST). Draw tubes should be filled completely. | ||||||||
| Handling: | Allow to clot, centrifuge SST or PST within 2 hours of collection and transport in original tube. Immediately centrifuge green top tube and separate plasma from cells into a plastic vial for transport. | ||||||||
| Stability: | 48 hours refrigerated. | ||||||||
| Standard Volume: | 2 mL serum or plasma. | ||||||||
| Minimum Volume: | 0.5 mL serum or plasma. | ||||||||
| Transport: | Refrigerated. | ||||||||
| Comments: | Loss of CO2 from an uncapped tube is approximately 6 mmol/L after 1 hour. See also: Basic Metabolic Panel (31300). |
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| Rejection Criteria: | Tubes other than those specified. | ||||||||
| Reference Range: | |||||||||||||||||||
| <18 years | 20-28 mEq/L | ||||||||||||||||||
| >18 years | 22-31 mEq/L | ||||||||||||||||||
| Measurement of bicarbonate aids in the diagnosis and treatment of serious disorders associated with acid-base imbalance in the respiratory and metabolic systems. | |||||||||||||||||||