329 results found
Medical tests
… to check whether a newborn baby has the enzyme needed to use phenylalanine in their body. Phenylalanine is an amino … phenylalanine level builds up in the baby's blood and can cause brain damage, seizures, and intellectual disability . The damage caused by PKU can begin weeks after the baby has started …
Medical tests
… during pregnancy. The level of inhibin A in the blood is used in a maternal serum quadruple screening test. Generally … 15 and 22 weeks, this test checks the levels of four substances in a pregnant woman's blood. The quad screen … or uE3), and the hormone inhibin A. The levels of these substances—along with a woman's age and other factors—help …
Medical tests
… the level of AFP in a pregnant woman's blood. AFP is a substance made in the liver of an unborn baby (fetus). The … non-pregnant women. The level of AFP in the blood is used in a serum quadruple screening test. This test is often … done between 15 and 22 weeks. It checks the levels of four substances in a pregnant woman's blood. They are the hormone …
Medical tests
… screen is a blood test that measures the levels of several substances in the blood (such as electrolytes ). A chemistry … problem is working. Some chemistry screens look at more substances in the blood than others do. The most complete … you have this test. How It Is Done A health professional uses a needle to take a blood sample, usually from the arm. …
Medical tests
… pictures of the tracer as it moves along. Your doctor can use these pictures to look for leaks, blockages, or any … to any more radiation while the scan is being done. A substance that stimulates the gallbladder may also be put … is working. You may be asked about your reaction to the substance used to stimulate the gallbladder. Sometimes …
Medical tests
… This test is done on a blood sample taken from a vein. A substance called antidiuretic hormone (ADH) partly controls … is making enough antidiuretic hormone (ADH) . Find the cause of seizures or coma. In severe cases, these can be … a buildup of urea in the blood. Poisoning with certain substances. These include ethanol (the alcohol in alcoholic …
Medical tests
… body's immune system normally attacks and destroys foreign substances such as bacteria and viruses. But in disorders known as autoimmune diseases, the … attach to the body's own cells as though they were foreign substances, often causing them to be damaged or destroyed. …
Medical tests
… to find germs (such as bacteria) in the urine that can cause an infection. Bacteria can enter through the urethra and … tract infection (UTI) . A sample of urine is added to a substance that promotes the growth of germs. If no germs … easily with the urethra. Men also have an antibacterial substance in their prostate gland that lowers their risk. …
Medical tests
… the time it takes your blood to clot. A PTT test can be used to check for bleeding problems. Blood clotting factors … factors. The absence of any of the clotting factors. Other substances, called inhibitors, that affect the clotting … low level of one of the blood clotting factors or another substance needed to clot blood. This can be caused by …
Medical tests
… germs (such as bacteria, a virus, or a fungus ) that can cause an infection. A sample of skin, tissue, or fluid is added to a substance that promotes the growth of germs. If no germs … a sample is collected, it is placed in a container with a substance (called growth medium or culture medium) that …
