321 results found
Medical tests
… How To Prepare How It Is Done How It Feels Risks Results Related Information Test Overview A skull X-ray is a series … of damage to cells or tissue from radiation, including the low levels of radiation used for this test. But the chance of …
Medical tests
… How To Prepare How It Is Done How It Feels Risks Results Related Information Test Overview An electrophysiology … the doctor inserts flexible tubes called catheters into blood vessels. These blood vessels are typically in the … prepare for your procedure. Preparing for the procedure Follow the instructions exactly about when to stop eating and …
Medical tests
… It Is Done How To Prepare How It Is Done How It Feels Risks Related Information Test Overview DHEA-S … before you have your blood drawn. In most cases, you are allowed to take your medicines with water the morning of the … because that is when the amount of DHEA-S is at its highest. Women may be asked to take the test at a certain …
Medical tests
… How To Prepare How It Is Done How It Feels Risks Results Related Information Test Overview Your esophagus is the tube … This checks the acid content (pH) in the esophagus. A low pH for long periods may mean that you often have … and any symptoms you have. You may be asked to avoid high-acid foods. You will not be able to take a bath, except …
Medical tests
… Nicotine Tests On this page: Related Information A nicotine test measures … the chemicals it produces, such as cotinine—in your blood or urine. It's usually done by testing a sample of … insurance. This is because people who smoke tend to have higher health costs over time. One type of test can help …
Medical tests
… How To Prepare How It Is Done How It Feels Risks Results Related Information Test Overview A viral load test measures … how much human immunodeficiency virus (HIV) is in the blood. The test measures the amount of the genetic material … viral load. This means that the amount of the virus is too low for the test to detect. When the virus is undetectable, …
Medical tests
… How To Prepare How It Is Done How It Feels Risks Results Related Information Test Overview A CD4+ count is a blood … CD4+ counts generally decrease as HIV progresses. A low CD4+ count usually means a weakened immune system and a higher chance of getting opportunistic infections. Why It Is …
Medical tests
… How To Prepare How It Is Done How It Feels Risks Results Related Information Test Overview A human papillomavirus (HPV) test is done to check for a high-risk HPV infection. Like a Pap test , an HPV test is … if they're not treated. There are many types of HPV. Some low-risk types cause common skin warts . Some cause genital …
Medical tests
… How To Prepare How It Is Done How It Feels Risks Results Related Information Test Overview A facial X-ray is a series … of damage to cells or tissue from radiation, including the low levels of radiation used for this test. But the chance of …
Medical tests
… How To Prepare How It Is Done How It Feels Risks Results Related Information Test Overview Vision tests check many … eye. Here are some common tests that check for blurred or low vision. Visual acuity (sharpness) tests. These tests … It includes the central visual field—which detects the highest degree of detail—and the peripheral visual fields. …
