272 results found
Medical tests
… the thyroid gland . If the blood calcium level is too low, the parathyroid glands release more PTH. This causes … process is reversed. PTH levels that are too high or too low can cause problems with the kidneys and bones and cause … gland growth (hyperplasia) or a parathyroid tumour. A low level of calcium in the blood. A low blood calcium level …
Medical tests
… gland that lies in front of your windpipe (trachea), just below your voice box (larynx). The thyroid gland uses iodine … T4. Why It Is Done Thyroid hormone tests are done to: Find out what is causing an abnormal thyroid-stimulating hormone … growths (nodules). Taking too much thyroid medicine. Low values Low thyroid hormone levels ( hypothyroidism ) may …
Medical tests
… right side. See how well the gallbladder is working. Find out if bile is leaking. Find anything that may be blocking … anything but water for 4 to 6 hours before the test. Follow all instructions carefully. How It Is Done You will need … on which part of your body is being examined. You may be allowed to keep on your underwear if it does not affect the …
Medical tests
… from your bladder. Your doctor will take it out at your follow-up visit. Why It Is Done Cystoscopy may be done to: Find … own. Follow the instructions exactly about when to stop eating and drinking. If you don't, your procedure may be … the scope. Next, the doctor puts either sterile water or salt water (saline) into your bladder to make it larger and …
Medical tests
… as electrolytes ). A chemistry screen tells your doctor about your general health, helps look for certain problems, … meal plan or lifestyle. To look for problems, such as a low or high blood glucose level that may be causing a specific symptom. To follow a specific health condition and check how well a …
Medical tests
… and after it has been stressed. It is often done to find out what may be causing symptoms like angina (such as chest … moves through the heart muscle, areas that have good blood flow absorb the tracer. Areas that do not absorb tracer may … how serious it is. These scans may also be done following surgery to correct a congenital heart defect. How To …
Medical tests
… , triglycerides , high-density lipoprotein (HDL) , and low-density lipoprotein (LDL) . Cholesterol and triglyceride … Other measurements that may be done include: Very-low-density lipoprotein (VLDL) cholesterol level. The ratio … Cholesterol and triglyceride testing is done: As part of a routine physical examination to screen for high cholesterol …
Medical tests
… rise during the early morning hours and are highest about 7 a.m. They drop very low in the evening and during the early phase of sleep. But … infection (sepsis) can cause high cortisol levels. Low values A low level of cortisol in the blood can be …
Medical tests
… into the blood. Reticulocytes are in the blood for about 2 days before developing into mature red blood cells. … reticulocyte counts to rise, to help you adjust to the lower oxygen levels at high altitudes. Why It Is Done A … Wrap an elastic band around your upper arm to stop the flow of blood. This makes the veins below the band larger so …
Medical tests
… diagnose your symptoms, it must be done while you are still eating foods that contain gluten. So if you have started a gluten-free diet, your doctor will have you go back to eating gluten foods several weeks ahead of the test. You … diagnose your symptoms, it must be done while you are still eating foods that contain gluten. So if you have started a …
