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Clinical Laboratory Test:
whole blood — carbon dioxide partial pressure

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Description

The clinical test for carbon dioxide partial pressure (pCO2) acquired from a patient's whole blood is a measure of the amount of carbon dioxide dissolved in the blood. It is used to assess the acid-base balance of the patient's blood. The pCO2 is typically measured using a blood gas analyzer. This device uses a sample of the patient's blood, typically taken from an artery, and measures the amount of carbon dioxide in the sample. The analyzer then calculates the pCO2 based on the amount of carbon dioxide present in the sample. The pCO2 can also be measured using a chemical method, such as a titration. In this method, a sample of the patient's blood is mixed with a known amount of a chemical reagent, such as sodium hydroxide. The amount of carbon dioxide in the sample is then determined by measuring the amount of the reagent that is consumed.

Synonyms
  • CO2 partial pressure
  • PaCO2
  • pCO2
Other Sample Sources for This Test
Some Diseases Associated with an Abnormal Carbon Dioxide Partial Pressure
Detailed Laboratory Testing Information (use the custom search buttons below to find details on these topics)

All of the following must be considered when interpreting clinical findings and are too extensive to be covered on this site: