Alternate Names : Arterial blood gas analysis, ABG
Values at sea level:
- Partial pressure of oxygen (PaO2) - 75 - 100 mmHg
- Partial pressure of carbon dioxide (PaCO2) - 35 - 45 mmHg
- A pH of 7.35 - 7.45
- Oxygen saturation (SaO2) - 94 - 100%
- Bicarbonate - (HCO3) - 22 - 26 mEq/L
Note: mEq/L = milliequivalents per liter; mmHg = millimeters of mercury
At altitudes of 3,000 feet and above, the oxygen values are lower.
Note: Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.
What do Abnormal Results Mean?
Abnormal results may be due to lung, kidney, or metabolic diseases. Head or neck injuries or other injuries that affect breathing can also lead to abnormal results.