329 results found
Medical tests
… Fetal ultrasound is a test done during pregnancy that uses reflected sound waves. It produces a picture of the … an echogram, or a scan. They may be saved as part of your baby's record. Fetal ultrasound can be done two ways. … also includes blood tests that measure the levels of two substances that may be related to birth defects. Why It Is …
Medical tests
… These tests measure electrical activity that occurs in your eye when you look at something. Electrophysiology … test also looks at other cells in the retina. It may be used to check for problems such as: Retina damage from drugs or other substances. Loss of central or peripheral vision from retina …
Medical tests
… a scan to look at kidney function, a radioactive tracer substance is injected into a vein in the arm and then … a triple renal study). Different radioactive tracers are used depending on what kind of scan is being done. Areas of … The radioactive tracer used in this test can get into your breast milk and is not good for the baby. How It Is …
Medical tests
… Test Overview A cardiac blood pool scan shows how well your heart is pumping blood to the rest of your body. During this test, a small amount of a radioactive substance called a tracer is injected into a vein. A gamma … Are or might be pregnant. Have recently had any test that uses a radioactive tracer, such as a bone scan or thyroid …
Medical tests
… of the waste product creatinine (say "kree-AT-uh-neen") in your blood and urine. These tests tell how well your kidneys are working. Another substance, creatine (say "KREE-uh-teen"), is formed when … of blood creatinine and blood urea nitrogen (BUN) can be used to find the BUN-to-creatinine ratio. This ratio can …
Medical tests
… Information Test Overview Helicobacter pylori tests are used to detect a Helicobacter pylori ( H. pylori ) infection … : Blood antibody test. A blood test checks to see whether your body has made antibodies to H. pylori bacteria. If you … . Stool antigen test. A stool antigen test checks to see if substances that trigger the immune system to fight an H. …
Medical tests
… It measures the density of minerals (such as calcium ) in your bones. This information helps your doctor estimate the … naturally become thinner as you grow older. This is because existing bone tissue is broken down faster than new bone … photon absorptiometry (DPA). This test uses a radioactive substance to measure bone density. It can measure bone …
Medical tests
… Overview Fertility awareness is a way to check the changes your body goes through during your menstrual cycle . (It's also called natural family … 5 days before you ovulate. For fertility awareness to be used as birth control, either you must not have sex or you …
Medical tests
… Information Test Overview Magnetic resonance imaging (MRI) uses a magnetic field and pulses of radio waves to make … ultrasound , or CT scan . The MRI makes pictures that show your breast's normal structure; tissue damage or disease, … might hear it called a "fast MRI.") This test is something your doctor or breast cancer screening centre may offer. Why …
Medical tests
… nicotine—or the chemicals it produces, such as cotinine—in your blood or urine. It's usually done by testing a sample of your blood or urine. The test is used to see if you smoke or use other forms of tobacco. All …
