231 results found
Medical tests
… fluid, or CSF ) that surrounds the brain and spinal cord. During a spinal tap, a needle is carefully inserted into the … may be present. The pressure of the CSF also is measured during the procedure. Why It Is Done A spinal tap is done … products you take. Some may increase the risk of problems during your test. Your doctor will tell you if you should …
Medical tests
… If a large amount of fluid is going to be taken out during the procedure, you may lie on your back with your … in your arm. It is important that you lie completely still during the procedure, unless you are asked to change … is taken out. Tell your doctor if you do not feel well during the test. Risks There is a very small chance that the …
Medical tests
… constant level. Estriol levels are most often measured only during pregnancy. Estriol is produced in large amounts by … are made mainly in the ovaries and in the placenta during pregnancy. Small amounts are also made by the adrenal … Help find fetal birth defects (especially Down syndrome ) during pregnancy. When the test for estriol is done with …
Medical tests
… how brain waves respond to certain things you look at during the test. Why It Is Done The different … done varies. Electroretinography (ERG) You sit or lie down during the test. Eye drops are used to numb the eye. A tiny … dark adaptation. Different wavelengths of light are used during the test to check for problems with the eye's rod and …
Medical tests
… Amniocentesis? Why It Is Done Amniocentesis may be done during your second trimester to find certain genetic … to stay overnight in the hospital unless problems occur during the test. You will lie on your back on an examination … on a TV screen. Your fetus's heart rate can also be watched during the test using ultrasound. With the ultrasound …
Medical tests
… cancer at an early stage. Many times this cancer is found during self-examination as a painless lump or a swollen … for swelling. Self-exam The self-examination is best done during or after a bath or shower—when the scrotum, the skin … is usually normal. There is no pain or discomfort during the examination. Abnormal: A small, hard lump (often …
Medical tests
… Progesterone is a female hormone produced by the ovaries during release of a mature egg from an ovary (ovulation). … progesterone levels drop and menstrual bleeding begins. During pregnancy, the placenta also produces high levels of … . Monitor the function of the ovaries and placenta during pregnancy. Help diagnose problems with the adrenal …
Medical tests
… You will be given a cloth or paper to cover yourself during the test. You will lie on your back on a table. A … can be viewed from other angles. You need to lie very still during each scan to avoid blurring the pictures. You may be asked to hold your breath briefly during some of the scans. Each scan may take about 60 to 90 …
Medical tests
… infection, or injury. Normally, cortisol levels 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 if you sleep during the day and are up at night, this pattern may be …
Medical tests
… your scrotum many times. You will need to lie very still during the ultrasound scan. You may be asked to take a breath and hold it for several seconds during the scan. When the test is finished, the gel is … about 20 minutes. How It Feels Most people don't feel pain during the test. If your scrotum hurts already from an …
