329 results found
Medical tests
… the level of calcium in the blood is carefully controlled. When blood calcium levels get low ( hypocalcemia ), the … release calcium to bring it back to a good blood level. When blood calcium levels get high ( hypercalcemia ), the … to the bones. Tuberculosis . Being on bedrest for a long time after a broken bone. Paget's disease . Low values Low …
Medical tests
… (including rheumatoid arthritis ) and some infections. Sometimes a healthy person can have a high RF level. The amount … test takes The test will take a few minutes. How It Feels When a blood sample is taken, you may feel nothing at all … is very little chance of having a problem from this test. When a blood sample is taken, a small bruise may form at the …
Medical tests
… used to check for thyroid gland problems. TSH is produced when the hypothalamus releases a substance called … and develop normally. This test may be done at the same time as tests to measure T3 and T4. Why It Is Done A test … test takes The test will take a few minutes. How It Feels When a blood sample is taken, you may feel nothing at all …
Medical tests
… do while you swallow. The test uses X-rays in real time (fluoroscopy) and records what happens when you swallow. While you swallow, the doctor and speech … Risks The barium in the food isn't harmful. Some people gag when they drink the barium fluid. In rare cases, a person …
Medical tests
… Also, vitamin D is converted to a more active form, causing the intestines to absorb more calcium and phosphorus. … and phosphorus levels in the blood may be done at the same time as a PTH test. Why It Is Done A test for parathyroid … 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
… eyes may be sensitive to light. You will have trouble focusing your eyes for several hours. If you know that your … home after the test. You also will need to wear sunglasses when you go outside or into a brightly lit room. How It Is Done Most of the time, a slit lamp examination is done by an ophthalmologist …
Medical tests
… want to bring something to read or a project to pass the time. For some types of bone scans, pictures are taken … How It Feels You may feel nothing at all from the needle when the tracer is injected, or you may feel a brief sting … How It Feels You may feel nothing at all from the needle when the tracer is injected, or you may feel a brief sting …
Medical tests
… The amount of folate in red blood cells measures the level when the cell was made, as much as 4 months earlier. This … cause of anemia . A folate test is often done at the same time as a test for vitamin B12 levels because a lack of … levels can also mean that you have a problem absorbing or using folate, such as a vitamin C deficiency, liver disease, …
Medical tests
… is caused by the herpes virus. HSV testing may also be done using other types of samples, such as spinal fluid, blood, … Feels You are likely to feel some mild discomfort or pain when the sores are rubbed to collect a sample for testing. … at the site. Results Test results are ready at different times for the different tests. Some test results may be back …
Medical tests
… at the combined screenings that you've had over a period of time. This is called an integrated screening. It's done in … done in the first trimester of pregnancy can be done using a sample of your blood and using ultrasound to measure … screening may show that a baby doesn't have a birth defect when he or she does have it. This is called a false-negative …
