329 results found
Medical tests
… to find germs (such as bacteria or a fungus) that can cause an infection. A bacterial infection in the blood, called … as corticosteroids or chemotherapy ) that change how well your body can fight infections (immunity). For a blood … to do anything at home to prepare for the test. Tell your health professional if you took antibiotics recently. How It …
Medical tests
… (ACTH). Cortisol has many functions. It helps the body use sugar (glucose) and fat for energy ( metabolism ), and … of the way cortisol levels vary throughout a day. If your doctor thinks you might make too much cortisol, the … even after you stop taking the medicine. How It Is Done A health professional uses a needle to take a blood sample, …
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. … Why It Is Done Fetal ultrasound is done to learn about the health of your fetus. Different details can be learned at …
Medical tests
… Overview Hemochromatosis gene (HFE) testing is a blood test used to check for hereditary hemochromatosis, an inherited … This test might be done if you have high iron levels in your blood. This test helps to find out if you have … You might have a cheek test or a blood test. Cheek test A health professional gently swabs or scrapes the inside of …
Medical tests
… increase the amount of catecholamines in the blood. This causes high blood pressure, excessive sweating, headaches, … test. Do not use tobacco for 4 hours before the blood test. Your doctor may ask you to stop certain medicines, such as … Ask for a blanket if you feel cold. How It Is Done A health professional uses a needle to take a blood sample, …
Medical tests
… 24 hours. Uric acid is made from the natural breakdown of your body's cells. It's also made from the foods you eat. … the urine can get too low. High levels of uric acid can cause crystals to form in joints. This causes a painful … doctor will also look at your results based on your age, health, and other factors. A value that isn't in the normal …
Medical tests
… higher when the liver is severely damaged or diseased, because the liver normally breaks down lactic acid. Very high … exercise for several hours before the test. Do not clench your fist while having your blood drawn for a lactic acid … These activities may change the results. How It Is Done A health professional uses a needle to take a blood sample, …
Medical tests
… time (PTT) is a blood test that measures the time it takes your blood to clot. A PTT test can be used to check for bleeding problems. Blood clotting factors … and prescription medicines you take. How It Is Done A health professional uses a needle to take a blood sample, …
Medical tests
… generally found in amounts equal to insulin . This is because insulin and C-peptide are linked when first made by the … the cause of low blood sugar (hypoglycemia). How To Prepare Your doctor will give you instructions about eating and … these medicines before your blood test. How It Is Done A health professional uses a needle to take a blood sample, …
Medical tests
… tolerance test (OGTT) measures the body's ability to use a type of sugar, called glucose, that is the body's main … women for gestational diabetes. How To Prepare Tell your doctor about all the prescription and non-prescription … doctor will also look at your results based on your age, health, and other factors. A value that isn't in the normal …
