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Direct Bilirubin
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.
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Blood Culture
This blood test finds out if you have an infection that affects your whole body, not just one part.
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Blood Type and Crossmatch
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.
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BNP (Blood)
This test measures the amount of a protein that builds up in your blood when you have heart failure. It's an important tool for doctors to diagnose heart failure quickly.
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Bordetella Pertussis Antibody (Blood)
This test checks for Bordetella pertussis antibodies in your blood. B. pertussis are the bacteria that cause pertussis, also called whooping cough.
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Nicotine Cotinine (Urine)
This test measures cotinine, a chemical your body makes after exposure to nicotine.
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Osmolality (Blood)
This test measures the concentration of dissolved particles, or osmolality, in your blood.
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Osmolality (Stool)
This test measures the concentration, or osmolality, of certain particles in a sample of your watery stool. The test is used to find out why you have chronic diarrhea.
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Osmolality (Urine)
This test measures the concentration of particles in your urine. It finds out if your electrolyte balance is normal and if your kidneys are working correctly.
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