329 results found
Medical tests
… checked for glaucoma. Glaucoma is an eye disease that can cause blindness by damaging the optic nerve . If you have … help control glaucoma. Check for birth defects that may cause glaucoma. How To Prepare If you wear contact lenses, … back in for 1 hour after the test or until the medicine used to numb your eye wears off. If your eyes might be …
Medical tests
… to find germs (such as bacteria or a fungus ) that can cause an infection. A sample of sputum is added to a substance … no germs grow, the culture is negative. If germs that can cause infection grow, the culture is positive. The type of … See if treatment is working. How To Prepare Do not use mouthwash before you collect your sputum sample. Some …
Medical tests
… response in a person. Skin tests are usually done because they are rapid, reliable, and generally less expensive than blood tests, but either type of test may be used. Skin tests A small amount of a suspected allergen is … allergy test may be done when a substance does not cause a reaction in the skin prick test but is still suspected …
Medical tests
… challenge and inhalation challenge tests are sometimes used to diagnose asthma and workplace asthma (occupational … test is rarely needed to diagnose asthma. But it may be used to: See whether the tubes that carry air to the lungs … Incorporated disclaims any warranty or liability for your use of this information. Your use of this information means …
Medical tests
… from a vein. Why It Is Done LDH levels help find the cause of lung disease, lymphoma, anemia, and liver disease. … doctor tells you to. How It Is done A health professional uses a needle to take a blood sample, usually from the arm. … normal. Your lab report should show the range that your lab uses for each test. The normal range is just a guide. Your …
Medical tests
… photon-emission computed tomography (SPECT) is a test that uses a special type of camera and a tracer (a radioactive … about where the tracer is located. A SPECT scan is often used to evaluate brain, head, and neck problems; to look at … be pregnant. Are breastfeeding. The radioactive tracer used in this test can get into your breast milk. Do not …
Medical tests
… urine from the bladder to outside the body. The doctor uses a thin, lighted tool called a cystoscope. With this … with liquid. This helps the doctor see better. It may cause you to feel pressure in your bladder area for a short … visit. Why It Is Done Cystoscopy may be done to: Find the cause of many urinary system problems. Examples include blood …
Medical tests
… It Is Done A cardiac perfusion scan is done to: Find the cause of unexplained chest pain or pressure. Find the cause of chest pain or pressure brought on by exercise. Check for the location and amount of damage caused by a heart attack. Identify coronary artery disease …
Medical tests
… Test Overview A mammogram is an X-ray of the breast that is used to screen for breast cancer . Mammograms can find … breast tomosynthesis is sometimes called 3D mammogram. It uses X-rays to create a three-dimensional image of the … from breast cancer. Your doctor may recommend testing at a younger age if you have risk factors for breast cancer. A …
Medical tests
… middle sections of the gastrointestinal tract . The test uses barium contrast material , fluoroscopy , and X-ray . … instead of an upper GI series in certain cases. Endoscopy uses a thin, flexible tube (endoscope) to look at the lining … Why It Is Done An upper GI series is done to: Find the cause of gastrointestinal symptoms, such as trouble …
