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Antinuclear Antibody
This blood test is done to help your doctor diagnose a type of illness called an autoimmune disease.
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Antiphospholipid Antibody
This test checks for antibodies that may be found in people with abnormal blood clots or autoimmune diseases.
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Antithrombin (Activity and Antigen)
The antithrombin activity and antigen tests are used to help find out what may be causing abnormal blood clots in your body.
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Anti-Tissue Transglutaminase Antibody
This test screens for celiac disease and also helps your doctor monitor your condition if you have this disease.
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Apolipoprotein A
This test measures the amount of a protein in your blood related to LDL and HDL cholesterol. It can help predict your risk for heart disease.
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Apolipoprotein B-100
This test measures the amount of a certain type of cholesterol in your blood. It helps your health care provider determine your risk for cardiovascular disease, a disease affecting your heart and blood vessels.
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Activated Partial Thromboplastin Clotting Time
This test measures how long it takes your blood to form a clot. You may need this test if your doctor believes that you have a problem with one or more clotting factors.
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Arterial Blood Gas (ABG)
An arterial blood gas analysis measures the balance of oxygen and carbon dioxide in your blood to see how well your lungs are working.
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Aspartate Transaminase
This test is used to diagnose liver damage.
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