This test measures the amount of the hormone gastrin in your blood. You may need this test if you have recurrent peptic ulcers.

This test looks for an enzyme called gamma-glutamyl transpeptidase in your blood. The test can help find out whether you have liver damage.

This test looks for enzyme activity in the red blood cells in your child's blood. It can help diagnose galactosemia, a rare inherited disorder.

This test checks for a deficiency in a protein in the blood known as Factor X. This protein helps with clotting.

This test helps find out if you have hemophilia A or another clotting disorder.

This test looks for a deficiency in a protein called factor V. This protein is one of your body's "clotting factors." When you have too little factor V, you may have bleeding problems.

The factor IX test is part of a larger screening test to find out what type of bleeding disorder you have.

This test measures how much of the protein prothrombin, or factor II, is in your blood. It can help diagnose bleeding and clotting disorders.

This test measures the amount of a protein called factor I, or fibrinogen, in your blood. It helps find out if you have a bleeding or clotting disorder.

This test measures the amount of alcohol, or ethanol, in your blood. This test is used by law enforcement agencies and hospitals to find out the concentration of alcohol in a person's blood.