arterial blood gas analysis
What the test involvesThe test is performed using a small needle to collect a sample of blood from an artery. The sample may be collected from the radial artery in the wrist, the femoral artery in the groin, or the brachial artery in the arm. Before blood is drawn, the health care provider may test circulation to the hand (if the wrist is the site). After the blood is drawn, pressure applied to the puncture site for a few minutes stops the bleeding.
The test must be sent to the laboratory for analysis quickly to ensure accurate results.
ResultsNormal blood test results at sea level are indicated in the table below.
At altitudes of 3,000 feet and above, the oxygen values are lower than at sea level.
Abnormal results may indicate respiratory, metabolic, or renal diseases. The results may also be abnormal with head or neck injuries, or other traumas that affect breathing.
Related categories• HEALTH AND DISEASE
• MEDICAL TESTS
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