329 results found
Medical tests
… exercise for several hours before the test. Do not clench your fist while having your blood drawn for a lactic acid test. These activities may change the results. How It Is Done A health professional uses a needle to take a blood sample, …
Medical tests
… of the way cortisol levels vary throughout a day. If your doctor thinks you might make too much cortisol, the test will probably be done late in the day. If your doctor thinks you may not be making enough, a test is … even after you stop taking the medicine. How It Is Done A health professional uses a needle to take a blood sample, …
Medical tests
… test. Do not use tobacco for 4 hours before the blood test. Your doctor may ask you to stop certain medicines, such as … Be sure to keep warm, because being cold can also increase your levels. 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
… Overview A chloride test measures the level of chloride in your blood or urine. Chloride is one of the most important … It helps keep the amount of fluid inside and outside of your cells in balance. It also helps maintain proper blood … your doctor tells you to. How It Is Done Blood test A health professional uses a needle to take a blood sample, …
Medical tests
… women for gestational diabetes. How To Prepare Tell your doctor about all the prescription and non-prescription … smoke, or do strenuous exercise for at least 8 hours before your first blood sample is taken. (You can drink water … 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
… (sodium). When a tumour that makes aldosterone is present, your aldosterone level will be high while a renin level will … medicines used to treat high blood pressure, especially spironolactone (Aldactone), eplerenone (Inspra), and … levels are highest in the early morning. 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 … time is an important test because the time it takes your blood to clot may be affected by: Blood-thinning … and prescription medicines you take. How It Is Done A health professional uses a needle to take a blood sample, …
Medical tests
… the cause of low blood sugar (hypoglycemia). How To Prepare Your doctor will give you instructions about eating and … used to treat type 2 diabetes can change the test results. Your doctor may ask you to stop these medicines before your blood test. How It Is Done A health professional uses a needle to take a blood sample, …
Medical tests
… to see whether you are a Tay-Sachs carrier, you should tell your doctor if you have had a blood transfusion in the past 3 months. Talk to your doctor about any concerns you have about the need for … be done, or what the results may mean. How It Is Done A health professional uses a needle to take a blood sample, …
Medical tests
… as you want up to 1 hour before the test. Be sure to tell your doctor about all the non-prescription and prescription … minutes before the blood sample is drawn. How It Is Done A health professional uses a needle to take a blood sample, … the digestive hormone secretin is injected into a vein in your arm. More blood samples are taken at the time of the …
