This is a set of tests that looks for harmful interactions between your blood and donor blood. The tests are done before a blood transfusion.

This test looks for bilirubin in your blood or urine. The test is often done to look for liver problems, such as hepatitis, or blockages, such as gallstones.

This test is used to find out whether you have pancreatitis or another pancreas-related disorder.

This test measures the level of the enzyme amylase in your blood. Amylase levels in your blood rise when your pancreas or your salivary glands are inflamed.

This test detects the presence of amphetamine in your urine. This drug can show up in your urine long after you've taken it.

This test checks the amount of ammonia in your blood. Ammonia may build up in your body if you have kidney or liver failure.

This test measures the amount of a certain enzyme in your blood. High levels are a sign of liver damage.

This test looks for a protein in your blood that may mean that you have liver cancer or one of several other cancers.

If you are pregnant, this test looks for a fetal substance called alpha-fetoprotein in your blood. Higher levels of AFP may mean your fetus has a birth defect.

This test checks a sample of amniotic fluid to confirm a suspected birth defect called an open neural tube defect in your fetus. Spina bifida is an example of a neural tube defect.