329 results found
Medical tests
… by the adrenal glands . Aldosterone levels tell the kidneys when to hold sodium in the body instead of passing it in the … Small amounts of sodium are also lost through the skin when you sweat. Most foods have sodium naturally in them or as an ingredient in …
Medical tests
… to see how well the immune system is working in people who have been diagnosed with human immunodeficiency virus (HIV) … are done to: Monitor how the HIV infection is affecting your immune system. Help diagnose acquired immune deficiency … for other infections ( opportunistic infections ). Decide when to start treatment to prevent opportunistic infections, …
Medical tests
… from) the mother and half from the father. Identical twins have the same pattern, but everyone else has their own … patterns match. The patterns are most likely to be similar when the donated organ or tissue comes from a close relative … diseases. How To Prepare In general, there's nothing you have to do before this test, unless your doctor tells …
Medical tests
… in genes called BRCA1 and BRCA2. This test can help you know your chance of getting breast cancer and ovarian … you inherit a mutation in a BRCA (say "BRAH-kuh") gene, you have a greater risk of breast and ovarian cancers as well as … risk. There are some important things to keep in mind when you are thinking about having a BRCA gene test. A …
Medical tests
… (BNP) test measures the amount of the BNP hormone in your blood. BNP is made by your heart and shows how well … Why It Is Done The BNP test is used to: Check to see if you have heart failure. A doctor may think that you have heart … to take a blood sample, usually from the arm. How It Feels When a blood sample is taken, you may feel nothing at all …
Medical tests
… ( RNA ) of HIV in the blood. Viral load is first measured when you are diagnosed with HIV infection. This first measurement … through sex. How To Prepare In general, there's nothing you have to do before this test, unless your doctor tells you …
Medical tests
… partly controls serum osmolality. Water constantly leaves your body as you breathe, sweat, and urinate. If you do not … of chemicals in your blood (serum osmolality) increases. When serum osmolality increases, your body releases ADH. … the water and the chemicals in your blood. Find out if you have severe dehydration or overhydration. Check to see if …
Medical tests
… labour, and delivery. It keeps track of the heart rate of your baby ( fetus ). It also shows how long each contraction … is a good way to tell if your baby is doing well or may have some problems. Two types of monitoring can be done: … 20 weeks of pregnancy. Internal monitoring is used only when you are in labour and your amniotic sac has broken. If …
Medical tests
… for the proteins troponin I (TnI) and troponin T (TnT). If your heart muscle is injured, such as from a heart attack , … in other body tissues, their levels in the blood may rise when those other tissues are damaged. Cardiac enzyme studies … you take. Talk to your doctor about any concerns you have regarding the need for the test, its risks, how it will …
Medical tests
… is part of the male reproductive system. Healthy people have low amounts of PSA in the blood. The amount of PSA in … (PSA) test is done to: Screen for prostate cancer. If your PSA level is higher than expected, your doctor may … can cause high PSA levels. Check if cancer may be present when results from other tests, such as a digital rectal …
