Blood gas analysis
Blood gas analysis (pronounced: /blʌd gæs əˈnælɪsɪs/) is a medical procedure that measures the amount of oxygen and carbon dioxide in the blood. It also determines the acidity (pH) of the blood.
Etymology
The term "blood gas analysis" is derived from the English words "blood" (from Old English blōd), "gas" (coined by chemist J.B. Van Helmont in 17th century), and "analysis" (from Greek analusis meaning "a breaking up").
Procedure
Blood gas analysis is usually performed on arterial blood, but can also be done on venous blood. The procedure involves taking a blood sample from an artery, usually in the wrist. The blood is then analyzed in a laboratory to measure the levels of oxygen (O2), carbon dioxide (CO2), and blood pH.
Interpretation
The results of a blood gas analysis can provide information about how well the lungs are moving oxygen into the blood and removing carbon dioxide from it. It can also give information about the body's acid-base balance, which can help to identify certain medical conditions.
Related Terms
- Arterial blood gas (ABG): A specific type of blood gas analysis that measures the levels of oxygen and carbon dioxide in arterial blood.
- Venous blood gas (VBG): A type of blood gas analysis that measures the levels of oxygen and carbon dioxide in venous blood.
- Oxygen saturation (SpO2): The level of oxygen in the blood, usually expressed as a percentage.
- Acid-base balance: The balance between the amount of acids and bases in the body, which is crucial for maintaining good health.
See Also
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