329 results found
Medical tests
… Test Overview A ketone test checks for ketones in your blood or urine. Ketones are substances that are made … low-carbohydrate or high-fat diet. Are starving or have an eating disorder, including disorders that result in poor … low-carbohydrate or high-fat diet. Are starving or have an eating disorder, including disorders that result in poor …
Medical tests
… Test Overview Bronchoscopy is a procedure that allows your doctor to look at your airway through a thin viewing … doctor will tell you how soon before the procedure to stop eating and drinking. Follow the instructions exactly about when to stop eating and drinking, or your procedure may be cancelled. Be …
Medical tests
… D test measures the amount of vitamin D in the blood. Your body needs vitamin D to absorb calcium . Calcium keeps your bones and muscles healthy and strong. If your muscles don't get enough … D to absorb calcium . Calcium keeps your bones and muscles healthy and strong. If your muscles don't get enough …
Medical tests
… before birth, and it usually is not present in the blood of healthy adults. Why It Is Done The carcinoembryonic antigen … there's nothing you have to do before this test, unless your doctor tells you to. How It Is Done A health … before birth, and it usually is not present in the blood of healthy adults. Why It Is Done The carcinoembryonic antigen …
Medical tests
… cells to clump together (agglutinate) at low temperatures. Healthy people generally have low levels of cold agglutinins … there's nothing you have to do before this test, unless your doctor tells you to. How It Is Done A health … cells to clump together (agglutinate) at low temperatures. Healthy people generally have low levels of cold agglutinins …
Medical tests
… and fatty substances used as a source of energy by your body. Lipids are found in your blood and are stored in tissues. They are an important part of cells, and they help keep your body working normally. Lipids include cholesterol , …
Medical tests
… how well the eyes, inner ears , and brain help you keep your balance and position (such as when you change from … when the head is moved. But nystagmus without moving your head or nystagmus that does not go away may be caused … of recordings is done. Baseline recordings are taken with your head at rest. More recordings are done: While you move …
Medical tests
… It measures the density of minerals (such as calcium ) in your bones. This information helps your doctor estimate the … is your bone density compared to the average score of a healthy 30-year-old. (This is called the young adult … Policy . Learn how we develop our content . Media gallery Healthy Bone Versus Bone Weakened by Osteoporosis Bone …
Medical tests
… disease . A tumour in an adrenal gland. How To Prepare If your doctor tells you to fast before your test, do not eat or drink anything except water for 9 to 12 hours before you have your blood drawn. In most cases, you are allowed to take …
Medical tests
… Overview A HIDA scan is an imaging test that checks how your gallbladder is working. The gallbladder is a small sac under your liver. It stores bile, a fluid that helps your body digest fats. If there are problems with the …
