Videonystagmography (VNG)
Videonystagmography (VNG) measures certain eye movements called nystagmus. It helps diagnose disorders of the vestibular …
7 min readA comprehensive A–Z reference of 302 medical tests from MedlinePlus (National Library of Medicine). Covers lab tests, diagnostic procedures, and screening tools.
This section provides a comprehensive A–Z reference of 302 medical tests from MedlinePlus, a service of the National Library of Medicine (NIH). Each article explains what the test is used for, why a doctor may order it, how to prepare, what to expect, and what results may mean.
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Videonystagmography (VNG) measures certain eye movements called nystagmus. It helps diagnose disorders of the vestibular …
7 min readA vision screening is an eye test that looks for possible vision problems. Many eye disorders are easily treated when …
8 min readA vitamin B test shows if you lack any B vitamins, which include B12, biotin, and niacin. A lack of B vitamins can cause …
7 min readA vitamin D test checks the levels of vitamin D in your blood. Very low levels may cause your bones to get weak and soft …
7 min readA vitamin E test measures the amount of vitamin E (or tocopherol) in your blood. Too little or too much vitamin E can …
6 min readBlood tests check your health by measuring or looking at certain substances in your blood. They're usually done by …
6 min readA white blood cell in stool (poop) test looks for white blood cells (leukocytes) in stool to help find out if …
6 min readA white blood count measures the number of white cells in your blood. Too few or too many white blood cells may be a …
7 min readA whooping cough test is used to diagnose whooping cough, a bacterial infection that can be deadly to infants. Learn …
8 min readThis test checks your blood and urine for xylose, a sugar your body normally absorbs. Low levels can be a sign of a …
6 min read