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An ABO Rh blood test is a laboratory test that is used to determine a person's blood type and Rh factor. The ABO blood group system is a classification system for human blood based on the presence or absence of certain antigens on the surface of red blood cells. There are four blood types in the ABO system: A, B, AB, and O. The Rh factor, also known as the Rhesus factor, is a protein that is found on the surface of red blood cells. People who have the Rh factor are considered Rh-positive, while those who do not have the Rh factor are considered Rh-negative.
The ABO Rh blood test is typically ordered to help ensure that a person receives the correct type of blood transfusion, as mismatched blood can cause serious reactions. The test is also used to determine a person's risk of developing certain blood disorders or to determine the possible cause of certain medical conditions. The test is performed on a blood sample taken from a vein in the arm.
This page is provided for educational and informational purposes only and does not constitute the provision of medical advice or professional services. The information provided should not be used for diagnosing or treating a health problem or disease, and those seeking personal medical advice regarding any of the tests and conditions referenced above are advised to consult with a licensed clinician. Always seek the advice of your qualified health provider regarding a medical condition and do not disregard professional medical advice or delay in seeking it because of any information on this page. If you think you may have a medical emergency, immediately call 911 or go to the nearest urgent care center or hospital.
