329 results found
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 …
Medical tests
… A kidney stone (renal calculus) forms in the kidney from substances that would normally pass out of the body in the urine. When there are large amounts of these substances, they separate from the urine and form kidney … through a ureter or the urethra may be painless or it may cause severe pain. A kidney stone may cause other symptoms, …
