305 results found
Medical tests
… records several body functions during sleep, such as brain activity, eye movement, oxygen and carbon dioxide blood … helps your doctor learn what times during the day you are active and what times you are sleeping. Why It Is Done Sleep … latency test If a multiple sleep latency test (MSLT) is being done, you'll need to stay at the sleep lab overnight …
Medical tests
… signals needed for vision. These tests measure electrical activity that occurs in your eye when you look at something. … vision loss that isn't found by a full-field ERG. Some types of retinitis pigmentosa . Electro-oculography (EOG) An … response (VER): Follow your doctor's instructions about eating to avoid low blood sugar. Avoid caffeine within 12 …
Medical tests
… a camera takes pictures of your gallbladder after a radioactive tracer is injected into a vein in your arm. The … of your clothes. This depends on which part of your body is being examined. You may be allowed to keep on your underwear … you are not exposed to any more radiation while the scan is being done. A substance that stimulates the gallbladder may …
Medical tests
… and brain of the fetus. This test can show if the fetus is getting enough oxygen and nutrients. Doppler ultrasound may … of your clothes, depending on which part of the body is being examined. You may be allowed to keep on your underwear … Testing may be done before and after exercise, if you are healthy enough. Veins in the arms and legs For this test, …
Medical tests
… be high while a renin level will be low. Usually a renin activity test is done when the aldosterone level is … pressure or low potassium levels. This is done when overactive adrenal glands or an abnormal adrenal growth are … caused by: Addison's disease . Kidney disease, such as the types of kidney disease seen in people who also have …
Medical tests
… may be used to find out if the right dose of heparin is being used. Low levels of blood clotting factors. A change in the activity of any of the clotting factors. The absence of any … used. Low levels of blood clotting factors. A change in the activity of any of the clotting factors. The absence of any …
Medical tests
… or below the skin to see if a reaction develops. There are three types of skin tests: Skin prick test. This test is done by … to a lab to find out if antibodies to any of the allergens being tested are present. If specific antibodies are found, …
Medical tests
… collect information about your heart's electrical activity. Your doctor can tell what kind of heart rhythm … Follow the instructions exactly about when to stop eating and drinking. This may be a few hours before the … is always a slight risk of damage to cells or tissue from being exposed to any radiation, including the low levels …
Medical tests
… the body. An exercise EKG translates the heart's electrical activity into line tracings on paper. The spikes and dips in … about starting an exercise program if you have been inactive for a number of years and have an increased chance of … through your body during the test. There is no danger of getting an electrical shock. Results Your doctor may be able …
Medical tests
… pulse and blood pressure may be watched while the tube is being inserted. pH monitoring A probe that measures pH will … the windpipe (trachea) instead of the esophagus as it is being inserted. You may vomit material from your stomach and … pulse and blood pressure may be watched while the tube is being inserted. pH monitoring A probe that measures pH will …
