329 results found
Medical tests
… attack and destroy the bacteria, virus, or other organism causing it. White blood cells are bigger than red blood cells but fewer in number. When a person has a bacterial infection, the number of white … rises very quickly. The number of white blood cells is sometimes used to find an infection or to see how the body is …
Medical tests
… down into the scrotum before or soon after birth. But sometimes they do not descend as expected. Having an undescended … or by his sex partner. The chance of cure is very high when this cancer is found early and treated right away. … only a minute. It is best to do it after a bath or shower, when the muscles of the scrotum are warm and relaxed. How It …
Medical tests
… at how urine is made and flows out of the kidneys. Sometimes a doctor will do multiple scans at one time (for … kidney functions. A chart called a renogram may be made using the information from the kidney scan by plotting the … Feels You may feel nothing at all from the needle puncture when the tracer is injected, or you may feel a brief sting …
Medical tests
… errors, such as nearsightedness or farsightedness , occur when light rays entering the eye can't focus exactly on the … The complete visual field is seen by both eyes at the same time. It includes the central visual field—which detects the … a problem. More testing is needed to identify what is causing the problem. Why It Is Done Visual acuity tests These …
Medical tests
… heart has to work harder than usual over a long period of time, such as from heart failure , the heart releases more … to take a blood sample, usually from the arm. How It Feels When a blood sample is taken, you may feel nothing at all … is very little chance of having a problem from this test. When a blood sample is taken, a small bruise may form at the …
Medical tests
… (SGOT). Low levels of AST are normally found in the blood. When body tissue or an organ such as the heart or liver is … high for about 4 days. The AST test may be done at the same time as a test for alanine aminotransferase, or ALT. The … test takes The test will take a few minutes. How It Feels When a blood sample is taken, you may feel nothing at all …
Medical tests
… 20 minutes. How It Feels You will feel a prick or sting when the anesthetic is given. You may feel tingling, … or damage to the tendon , nerve, or joint is rare. Sometimes the doctor may not be able to draw any fluid out. The … stain and culture. Bacteria in the joint fluid that are causing an infection may be seen under a microscope after …
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 … and phosphate, may be checked in a blood sample at the same time as a blood test for sodium. Why It Is Done A sodium …
Medical tests
… as soon as your baby is 10 days old, but it is often done when a baby is 2 to 4 weeks of age. Your child may need more … preparation is needed before having this test. But avoid using creams or lotions on the skin for 24 hours before the … Bring your child's favourite book or toy to help pass the time while the test is done. See if your child might be able …
Medical tests
… drink. But food in your stomach may increase the amount of time it takes for the blood alcohol to reach its highest … balloon and a tube) containing crystals that change colour when exposed to alcohol from your breath. This device is … mouth from a recent drink can give false results. So can using mouthwash or mouth spray, such as mouth sprays to …
