328 results found
Medical tests
… CD4+ Count Test On this page: Test Overview Why It Is Done How To … Results Test Overview A CD4+ count is a blood test to see how well the immune system is working in … virus (HIV) . CD4+ cells are a type of white blood cell. White blood cells are important in fighting …
Medical tests
… Tissue Type Test On this page: Test Overview Why It Is Done How To … Test Overview A tissue type test is a blood test that identifies substances called antigens on the … antigen pattern for donated tissue or organs (including a blood platelet transfusion or bone marrow transplant) is a …
Medical tests
… Tay-Sachs Test On this page: Test Overview Why It Is Done How To … amount of an enzyme called hexosaminidase A (Hex A) in the blood. Hex A breaks down fatty substances in the brain and … children. The Tay-Sachs enzyme test is usually done on blood taken from a vein or from the umbilical cord right …
Medical tests
… Creatine Kinase Test On this page: Test Overview Why It Is Done How To … enzyme also can be found in smaller amounts in the brain. A blood test to check the level of CK can show if there has … It Is Done A health professional uses a needle to take a blood sample, usually from the arm. How It Feels When a …
Medical tests
… Hepatitis B Virus Tests On this page: Test Overview Why It Is Done How To … Test Overview Hepatitis B tests are blood tests that show whether you have an active hepatitis B … It Is Done A health professional uses a needle to take a blood sample, usually from the arm. How It Feels When a …
Medical tests
… Lung Function Tests On this page: Test Overview Why It Is Done How To … lungs put oxygen into and remove carbon dioxide from your blood. Types of lung function tests include: Spirometry. Gas … let you know how well gases are being absorbed into your blood from your lungs. Gas diffusion tests include: Arterial …
Medical tests
… Antithyroid Antibody Tests On this page: Test Overview Why It Is Done How To … tissue or make the cells produce thyroid hormones. They are blood tests. Antibodies that destroy thyroid tissue can lead … It Is Done A health professional uses a needle to take a blood sample, usually from the arm. How It Feels When a …
Medical tests
… Potassium (K) in Urine Test On this page: Test Overview Why It Is Done How To … levels can be affected by how the kidneys are working, the blood pH , and the amount of potassium you eat. The hormone … urination. Other symptoms may include dehydration , low blood pressure, confusion, irritability, paralysis, and …
Medical tests
… Liver Function Tests On this page: Test Overview Why It Is Done How To Prepare How It Is Done Results Test Overview Some blood tests are used to determine whether your liver is … It Is Done A health professional uses a needle to take a blood sample, usually from the arm. Results Normal All …
Medical tests
… Albumin Urine Test On this page: Test Overview Why It Is Done How To … a protein called albumin . Albumin is normally found in the blood and filtered by the kidneys. When the kidneys are … conditions can lead to kidney damage. These include high blood pressure , heart failure , cirrhosis , and lupus . If …
