What is a urobilinogen in urine test? Urobilinogen in urine test measures the amount of urobilinogen in a urine sample. Urobilinogen is formed from the reduction of bilirubin. Bilirubin is a yellowish substance found in your liver that helps break down red blood cells. Normal urine contains some urobilinogen. If there is little or no […]
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What is videonystagmography (VNG)? Videonystagmography (VNG) is a test that measures a type of involuntary eye movement called nystagmus. These movements can be slow or fast, steady or jerky. Nystagmus causes your eyes to move from side to side or up and down, or both. It happens when the brain gets conflicting messages from your eyes
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What is vision screening? A vision screening, also called an eye test, is a brief exam that looks for potential vision problems and eye disorders. Vision screenings are often done by primary care providers as part of a child’s regular checkup. Sometimes screenings are given to children by school nurses. Vision screening is not used to diagnose vision
What is a vitamin B test? This test measures the amount of one or more B vitamins in your blood or urine. B vitamins are nutrients the body needs so that it can perform a variety of essential functions. These include: Maintaining normal metabolism (the process of how your body uses food and energy) Making healthy blood
What is a vitamin D test? Vitamin D is a nutrient that is essential for healthy bones and teeth. There are two forms of vitamin D that are important for nutrition: vitamin D2 and vitamin D3. Vitamin D2 mainly comes from fortified foods like breakfast cereals, milk, and other dairy items. Vitamin D3 is made by
What is a vitamin E (tocopherol) test? A vitamin E test measures the amount of vitamin E in your blood. Vitamin E (also known as tocopherol or alpha-tocopherol) is a nutrient that is important for many body processes. It helps your nerves and muscles work well, prevents blood clots, and boosts the immune system. Vitamin E is a
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What is a white blood cell (WBC) in stool test? This test looks for white blood cells, also known as leukocytes, in your stool. White blood cells are part of the immune system. They help your body fight off infections and other diseases. If you have leukocytes in your stool, it can be a sign of a bacterial
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What is a whooping cough test? Whooping cough, also known as pertussis, is a bacterial infection that causes severe fits of coughing and trouble breathing. People with whooping cough sometimes make a “whooping” sound as they try to take a breath. Whooping cough is very contagious. It is spread from person to person by coughing or sneezing. You can get
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What is a Yeast Infection Test? A yeast infection test is used to diagnose and detect yeast infections. There are different methods of yeast testing, depending on where you have symptoms. Yeast is a type of fungus that can live on the skin, mouth, digestive tract, and genitals. Some yeast in the body is normal,
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What is a Zika virus test? Zika is a viral infection usually spread by mosquitos. It can also spread through sex with an infected person or from a pregnant woman to her baby. A Zika virus test looks for signs of the infection in blood or urine. Mosquitos that carry the Zika virus are most common in areas