This test measures the amount of acetaminophen in the blood. Acetaminophen is a common pain reliever and fever reducer. It's safe and effective when taken ...

Acid-fast bacillus (AFB) is a type of bacteria that causes tuberculosis (TB) and other infections. AFB tests look for AFB bacteria in sputum. An AFB smear ...

ADHD screening is used to help find out if you or your child has ADHD. ADHD is a behavioral disorder that makes it hard to sit still, pay attention, and ...

This test measures the level of adrenocorticotropic hormone (ACTH) in the blood. ACTH is made by the pituitary gland and controls the production of a hormone ...

An allergy blood test measures IgE. It's a protein made by your immune system. High levels of IgE may mean you have an allergy. Learn more. ... Allergy Blood Test ...

An allergy skin test helps diagnose allergies by placing small amounts of specific allergens on the skin. Allergens are substances that cause an allergic ...

An AFP (alpha-fetoprotein) tumor marker test measures the level of AFP in your blood. High levels of AFP can be a sign of liver cancer, cancer of the ovaries ...

This test measures the level of alpha-1 antitrypsin (AAT) in the blood. AAT is a protein that protects the lungs from damage. A low level of AAT is a sign ...

An alpha-fetoprotein (AFP) test is a blood test done during pregnancy to check the baby's risk for birth defects. Learn more. ... Alpha-Fetoprotein (AFP) Test What ...

An albumin blood test measures the level of albumin in your blood. Low albumin levels can indicate a disorder of the liver or kidneys. Learn more. ... Albumin Blood ...