Definition This process involves collecting a sample of blood from an artery for testing in the laboratory.
Arterial blood samples are used for testing of blood gases or blood chemistry. They are also used for performing blood cultures.
How is the test performed? In this test, blood is drawn from an artery. Common sites include the wrist, elbow or groin.
After cleaning the area with an antiseptic, a numbing agent, or local anaesthetic, may be injected at the spot to reduce discomfort. A sharp, hollow needle is inserted into the artery. Blood is collected using a syringe treated with heparin. Heparin, an anticoagulant, keeps the sample from clotting in the syringe. Pressure is applied to the collection site until bleeding stops.
What is involved in preparation for the test? A person preparing for this test should request specific instructions from his or her doctor.
What do the test results mean? The results of the test depend on the normal and abnormal values for the specific test being conducted.
Author: David T. Moran, MD Reviewer: HealthAnswers Australia Medical Review Panel Editor: Dr David Taylor, Chief Medical Officer HealthAnswers Australia Last Updated: 1/10/2001 Contributors Potential conflict of interest information for reviewers available on request
