329 results found
Medical tests
… The vibration speed of a sound wave determines how high or low a sound is (pitch). The height of the sound wave … than in the other ear. You can only hear certain sounds at high decibel levels. You can hear sounds, but you can't … to hear it. Frequency, or pitch (whether a sound is low or high), is measured in vibrations per second, or hertz (Hz). …
Medical tests
… makes it easier to find problems with increased or abnormal blood flow, such as with some types of cancer or areas of … and valuable test for looking at the breast. But it has a high rate of false-positive results. And it's not available … the test. But most reactions are mild and can be treated using medicine. If you breastfeed and are concerned about …
Medical tests
… tests are done to find certain antibodies that attack red blood cells. Antibodies are proteins made by the immune … cause antibodies to be made. Transfusion reaction Human blood is typed by certain markers (called antigens ) on the surface of red blood cells . If you get a blood transfusion, the transfused …
Medical tests
… Test Overview Partial thromboplastin time (PTT) is a blood test that measures the time it takes your blood to … in veins and arteries. The PTT can get longer when you are using heparin, so your PTT value needs to be closely checked. If you have a longer PTT, you may have a higher risk of bleeding. Medical Tests: …
Medical tests
… Test Overview A d-dimer test is a blood test that measures a substance that is released when a … means that a blood clotting problem isn't likely. A higher-than-normal d-dimer level might mean that there is a blood-clotting problem. But a higher level might be caused by some other health problem or …
Medical tests
… loss of consciousness or dementia . Help find what is causing a change in consciousness . Find out if a person who … waves are normally found when you are alert or have taken high doses of certain medicines, such as benzodiazepines . … has stopped. It's usually caused by lack of oxygen or blood flow inside the brain. It may happen when a person has …
Medical tests
… and pulses of radio wave energy to provide pictures of blood vessels inside the body. In many cases MRA can provide … tomography (CT) scan . MRA can find problems with the blood vessels that may be causing reduced blood flow. With MRA, both the blood flow and …
Medical tests
… himself or by his sex partner. The chance of cure is very high when this cancer is found early and treated right away. … also check the lymph nodes in your groin and your inner thigh for swelling. Self-exam The self-examination is best … mean an infection, such as epididymitis . Or it may mean blood flow to the testicle is blocked ( testicular torsion …
Medical tests
… X-rays to provide detailed pictures of the heart and the blood vessels that go to the heart, lung, brain, kidneys, … and arms. This test can show narrowed or blocked areas of a blood vessel. It can also show whether there is a bulge ( … how you are feeling. Risks The chance of a CT angiogram causing a problem is small. There is a chance of an allergic …
Medical tests
… how much human immunodeficiency virus (HIV) is in the blood. The test measures the amount of the genetic material ( RNA ) of HIV in the blood. Viral load is first measured when you are diagnosed … undetectable. This means there is very little virus in your blood. Why It Is Done A viral load test is done to watch for …
