This test measures the amount of uric acid in the fluid of your joints. The test can help your doctor find out if you have gout, a type of arthritis.

This test measures the amount of uric acid in your blood. Too much uric acid can cause gout or kidney stones.

This test measures the amount of urea nitrogen in your urine. The test can help diagnose kidney problems.

This test measures the amount of urea nitrogen in your blood. It can help your doctor see how well your kidneys are working.

This test is used to see if a child has certain chromosome changes.

This test checks your stool for two enzymes made by the pancreas. The test measures how well your pancreas is working to see if you have pancreatic insufficiency or cystic fibrosis.

This test measures levels of trypsin in your blood to see if you have pancreatitis.

This test measures the amount of the protein troponin in your blood. It can tell your doctor if you are having a heart attack.

This test measures the amount of triglycerides in your blood. This test is part of a group of cholesterol and blood fat tests called a fasting lipoprotein panel, or lipid panel.

This test is used to check a sample of blood or urine for tricyclic antidepressants. Although these medicines can be helpful in normal doses, taking too much can be fatal.