329 results found
Medical tests
… instead. This is called an autoimmune reaction. People who have one autoimmune disease may get another one. Tell your doctor if you have any new or worse symptoms. These … to take a blood sample, usually from the arm. How It Feels When a blood sample is taken, you may feel nothing at all …
Medical tests
… measures the amount of a type of sugar, called glucose, in your blood. Glucose comes from carbohydrate foods . It is … is produced in the pancreas and released into the blood when the amount of glucose in the blood rises. Normally, … Fasting blood sugar (FBS) measures blood glucose after you have not eaten for at least 8 hours. It is often the first …
Medical tests
… used to check for thyroid gland problems. TSH is produced when the hypothalamus releases a substance called … (T3) and thyroxine (T4). T3 and T4 help control your body's metabolism . Triiodothyronine (T3) and thyroxine … hormone (congenital hypothyroidism) may, in severe cases, have below-average intelligence. Older children also need …
Medical tests
… in the blood and fluid levels in the body, which affects your blood pressure. A renin test is often done at the same … as an aldosterone test. In some people, it may be normal to have high blood levels of both renin and aldosterone. If … the cause of high blood pressure (hypertension), especially when potassium levels in the blood are low. How To Prepare …
Medical tests
… by the adrenal glands ( Cushing's syndrome ). Normally, when the pituitary gland makes less adrenocorticotropic … cortisol levels often stay very high in people who have Cushing's syndrome. Sometimes other conditions can keep … and uncontrolled diabetes. The night before the blood test, you will take a dexamethasone pill. The next morning, the …
Medical tests
… produced by cells, called G cells, in the stomach lining. When food enters the stomach, G cells trigger the release of … chew gum or smoke cigarettes for 4 hours before the test. You can drink as much water as you want up to 1 hour before … of the injection, and then every 5 minutes until 15 minutes have passed. And then another sample is taken at 30 minutes …
Medical tests
… checks for antibodies to the Toxoplasma gondii parasite . Your body's natural defence system ( immune system ) will make these antibodies only if you have been infected by this tiny parasite. The amount and … to take a blood sample, usually from the arm. How It Feels When a blood sample is taken, you may feel nothing at all …
Medical tests
… work. Potassium levels often change with sodium levels. When sodium levels go up, potassium levels go down, and when … kidneys are working, the blood pH , the amount of potassium you eat, the hormone levels in your body, severe vomiting, … is working. Check people with high blood pressure who may have a problem with their kidneys or adrenal glands. Check …
Medical tests
… Overview A medicine blood level test measures how much of your medicine is in your blood. Your doctor checks it to … your test results to adjust your dose. You may need testing when you take medicines such as: Cyclosporine and … your test at a certain time of day. For example, you may have your test in the morning, before you take your …
Medical tests
… and fatty substances used as a source of energy by your body. Lipids are found in your blood and are stored in … flow problems, including heart attack and stroke. If you have unusual symptoms, such as yellow fatty deposits in the … age, sex, and race. Whether or not you smoke. Learn more When to Have a Cholesterol Test How To Prepare Your doctor …
