289 results found
Medical tests
… Information Test Overview A parathyroid hormone (PTH) blood test measures the level of parathyroid hormone in the … 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
… changes the levels of the hormone cortisol in the blood. This test checks for a condition in which large … a dose of dexamethasone, cortisol levels often stay very high in people who have Cushing's syndrome. Sometimes other conditions can keep cortisol levels high during this test. Examples include alcohol use disorder …
Medical tests
… Overview A folate test measures the amount of folate in the blood. Folate is one of many B vitamins. The body needs … 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 …
Medical tests
… (ALP) test measures the amount of the enzyme ALP in the blood. ALP is made mostly in the liver and in bone with some … D deficiency, or damaged liver cells. If the ALP level is high, more tests may be done to find the cause. The amounts … the blood may be measured and used to determine whether a high level is from the liver or bones. This is called an …
Medical tests
… An ammonia test measures the amount of ammonia in the blood. Most ammonia in the body forms when protein is broken … 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
… Test Overview A lactic acid test is a blood test that measures the level of lactic acid made in … 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
… measures the amount of prostate-specific antigen in the blood. PSA is released into the blood by the prostate , … done to: Screen for prostate cancer. If your PSA level is higher than expected, your doctor may suggest other tests, … such as an enlarged prostate and prostatitis, can cause high PSA levels. Check if cancer may be present when results …
Medical tests
… (AST) test measures the amount of this enzyme in the blood. AST is normally found in red blood cells , liver , … severe damage, AST levels rise in 6 to 10 hours and remain high for about 4 days. The AST test may be done at the same … for you. Results are usually available within 12 hours. High values High levels of AST may be caused by: Liver …
Medical tests
… checks the level of this male hormone (androgen) in the blood. Testosterone affects sexual features and development. … 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
… test measures the level of the hormone gastrin in the blood. Gastrin is produced by cells, called G cells, in the … tract . Sometimes a test for gastrin is done after eating a high-protein diet or after receiving an injection of the … that isn't in the normal range may still be normal for you. High levels High gastrin levels may be caused by: …
