302 results found
Medical tests
… Why It Is Done How To Prepare How It Is Done How It Feels Risks Results Test Overview A … more calcium and phosphorus. If the calcium level is too high, the parathyroid glands release less PTH, and the whole process is reversed. PTH levels that are too high or too low can cause problems with the kidneys and …
Medical tests
… Why It Is Done How To Prepare How It Is Done How It Feels Risks Results Test Overview A … pressure. But it is often used as a simple way to check for high IOP and is the easiest way to test children. This type … eye pressure is different for each person and is usually higher just after you wake up. The pressure inside the eye, …
Medical tests
… Why It Is Done How To Prepare How It Is Done How It Feels Risks Results Test Overview A … levels vary throughout the day. They are usually highest in the morning and lowest in the evening. Why It Is Done For high or low levels of testosterone, a testosterone test may …
Medical tests
… Why It Is Done How To Prepare How It Is Done How It Feels Risks Results Test Overview An ammonia … failure. Check the level of ammonia in a person receiving high-calorie intravenous (IV) nutrition (hyperalimentation). … that isn't in the normal range may still be normal for you. High values High levels of ammonia in the blood may be …
Medical tests
… Why It Is Done How To Prepare How It Is Done How It Feels Risks Results What Affects the Test … (SI units) 110–1500 picograms per millilitre (pg/mL) High values High levels of vitamin B12 can occur in liver disease (such …
Medical tests
… Why It Is Done How To Prepare How It Is Done How It Feels Risks Results Test Overview A bilirubin … direct bilirubin measurements. When bilirubin levels are high, the skin and whites of the eyes may look yellow … sample will be needed if the baby's bilirubin level is high. Blood sample from a vein A health professional uses a …
Medical tests
… Why It Is Done How To Prepare How It Is Done How It Feels Risks Results Test Overview A lactic … for energy and makes lactic acid. Lactic acid levels get higher when strenuous exercise or other conditions—such as … oxygen throughout the body. Lactic acid levels can also get higher when the liver is severely damaged or diseased, …
Medical tests
… Why It Is Done How To Prepare How It Is Done How It Feels Risks Results Test Overview A … of FSH varies throughout a woman's menstrual cycle and is highest just before she releases an egg (ovulates). In men, … with you in relation to your symptoms and past health. High values High FSH values in a woman may mean: A genetic …
Medical tests
… Why It Is Done How To Prepare How It Is Done How It Feels Risks Results What Affects the Test … prematurely, such as hemolytic anemia . Also, being at high altitudes may cause reticulocyte counts to rise, to help you adjust to the lower oxygen levels at high altitudes. Why It Is Done A reticulocyte count is done …
Medical tests
… Why It Is Done How To Prepare How It Is Done How It Feels Risks Results Test Overview A folate … B12 deficiency is working. See if the folate level is high enough to prevent certain birth defects. How To Prepare … that isn't in the normal range may still be normal for you. High values High levels of folate in the blood may mean that …
