329 results found
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, …
Medical tests
… monoxide (CO) into the blood. Two different methods are used for this test. Single-breath or breath-holding method: … tests are done to measure how your airways respond to substances that may be causing asthma or wheezing. These … During the test, you inhale increasing amounts of a substance through a nebulizer. This is a device that uses a …
Medical tests
… checks your levels of protein, sugar, blood cells, or other substances in your urine. A urine test may be done to help find the cause of symptoms. The test can give information about your … take out waste material, minerals, fluids, and other substances from the blood to be passed in the urine. Urine …
Medical tests
… blood varies throughout her menstrual cycle . After menopause , it drops to a very low but constant level. Estriol … 15 and 22 weeks of pregnancy. It checks the levels of four substances in a pregnant woman's blood. They are the hormone … (unconjugated estriol, or uE3). The levels of these substances—along with a woman's age and other factors—help …
Medical tests
… against sperm in blood, vaginal fluids, or semen. The test uses a sample of sperm and adds a substance that binds only to affected sperm. Semen can cause … or semen. The test uses a sample of sperm and adds a substance that binds only to affected sperm. Semen can cause …
