156 results found
Medical tests
… is carefully controlled. When blood calcium levels get low ( hypocalcemia ), the bones release calcium to bring it … As blood calcium levels get high, phosphate levels get low, and the opposite is also true. It is important to get … fish, green vegetables, and fruit. Most people who have low or high levels of calcium do not have any symptoms. …
Medical tests
… levels of both renin and aldosterone. If renin levels are low and aldosterone levels are high, a tumour may be present … especially when potassium levels in the blood are low. How To Prepare For 2 to 4 weeks before the test, you … For 3 days before a renin test, you may be asked to follow a special low-sodium diet. You may be asked to not eat …
Medical tests
… test. Why It Is Done You may need this test if you: Have low levels of calcium or phosphate . Have osteoporosis or low bone density . Had a broken bone after a fall from … gone through menopause and worry about osteoporosis. Have low levels of vitamin D. How To Prepare In general, there's …
Medical tests
… aldosterone level will be high while a renin level will be low. Usually a renin activity test is done when the … adrenal glands. Find the cause of high blood pressure or low potassium levels. This is done when overactive adrenal … sauce, and salty snacks like potato chips or pretzels. A low-salt diet can also increase aldosterone levels. Tell …
Medical tests
… including laxatives, aspirin, mouthwash, and toothpaste. Low sodium levels have many causes, such as heart failure, … minerals in the body. Find the cause of symptoms from low or high levels of sodium. Check on the progress of … levels of the hormone aldosterone (hyperaldosteronism). Low levels Low sodium levels (hyponatremia) can be caused by …
Medical tests
… forms of thalassemia , may cause hemoglobin A levels to be low and hemoglobin F levels to be high. Hemoglobin F (fetal … in the normal range may still be normal for you. High and low values Higher-than-normal amounts of both hemoglobin A2 … F may mean a mild form of thalassemia is present. A very low level of hemoglobin A and a high level of hemoglobin F …
Medical tests
… B12 to use folate. So if vitamin B12 levels are very low, folate can't be used by the cells, and high levels of … is not a reliable way to test for a vitamin B12 deficiency. Low values Low folate levels can also mean that you have a problem …
Medical tests
… Wrap an elastic band around your upper arm to stop the flow of blood. This makes the veins below the band larger so it is easier to put a needle into the … a vein. You may get a small bruise at the site. You can lower the chance of bruising by keeping pressure on the site …
Medical tests
… substances through the blood. When prealbumin levels are lower than normal, it may be a sign of a poor diet … test to be sure that a poor diet is the reason for your low prealbumin levels. Why It Is Done A prealbumin blood … hospital or before and after surgery. Poor nutrition can slow healing and recovery. See how well supplements or …
Medical tests
… by the intestines, and its level in blood and urine is low. Why It Is Done A test for D-xylose is done to: Check to … other foreign matter in the urine sample. You will not be allowed to eat until the test is completed. How It Feels … the amount of D-xylose in the blood and urine will be very low. Normal Each lab has a different range for what's …
