329 results found
Medical tests
… These tests measure electrical activity that occurs in your eye when you look at something. Electrophysiology … problems of the retina. A full-field ERG can check how well your entire retina is working. A multifocal ERG (mfERG) … special to prepare for the tests. Follow any instructions your doctor gives you about what to do before your test. For …
Medical tests
… How To Prepare Do not use mouthwash before you collect your sputum sample. Some types of mouthwash can kill bacteria and could affect your results. If bronchoscopy will be used to collect your sputum sample, your doctor will tell you how soon …
Medical tests
… there's nothing you have to do before this test, unless your doctor tells you to. How It Is Done This test is done … waist. And you may drape a paper or cloth covering around your shoulders. Remove all jewellery from your head and around your neck. You will lie on your back on …
Medical tests
… Overview Some blood tests are used to determine whether your liver is damaged or inflamed. Although these tests help your doctor evaluate how well your liver is working, they cannot tell if you have …
Medical tests
… a test that measures and records the electrical activity of your brain. Special sensors called electrodes are attached to your head. They're hooked by wires to a computer. The computer records your brain's electrical activity on the screen. Or it may …
Medical tests
… there's nothing you have to do before this test, unless your doctor tells you to. How It Is Done Blood test A health … in seconds. You will also need wipes or towelettes to clean your genital area before you collect a urine sample. Wash your hands before you collect the urine. Prepare the …
Medical tests
… (BNP) test measures the amount of the BNP hormone in your blood. BNP is made by your heart and shows how well your heart is working. Normally, only a low amount of BNP is …
Medical tests
… much they are affected. These tests check to see how well your spinal nerves are working. They also check the nerves in your arms and legs. Why It Is Done You may need an EMG to find diseases that damage your muscles or nerves or to find out why you can't move …
Medical tests
… hours before the test. Because this is a test involving your heart, you may have to stay overnight in the hospital … help you relax. You will get a shot of anesthetic to numb your skin and deeper tissues. Then a long, thin needle will be carefully inserted just below your breastbone. (In some cases, the needle is inserted …
Medical tests
… glands then make a hormone called cortisol, which helps your body manage stress. Cortisol is needed for life, so its … ACTH levels may be tested in the morning or evening if your doctor thinks that they are abnormal. Cortisol levels … to eat or drink for 10 to 12 hours before an ACTH test. Your doctor may ask you to eat low-carbohydrate foods for 48 …
