281 results found
Medical tests
… eye. Here are some common tests that check for blurred or low vision. Visual acuity (sharpness) tests. These tests … the other visual acuity tests show that your eyesight is below normal and can be corrected by glasses. Visual field … stroke, head injury, or other condition that causes reduced blood flow to the brain. Colour vision tests These tests may …
Medical tests
… to: Check for coronary artery disease, which can reduce blood flow to the heart muscle during stress. Look at the heart … and check how well they work. Check to see how well blood flows through the heart, heart valves, and blood vessels. How …
Medical tests
… and how soon to do it. If you take a medicine that prevents blood clots, your doctor may tell you to stop taking it … or doctor asks you to tighten (contract) the muscle slowly and steadily. This electrical activity is recorded. … make some people anxious. Keep in mind that only a very low-voltage electrical current is used. And each electrical …
Medical tests
… outside the body change a lot. When you are too hot, the blood vessels in your skin widen to carry the excess heat to … too cold, your blood vessels narrow. This reduces blood flow to your skin to save body heat. You may start to shiver. … is measured to: Check for fever. Check for a very low body temperature in people who have been exposed to …
Medical tests
… the doctor inserts flexible tubes called catheters into blood vessels. These blood vessels are typically in the … prepare for your procedure. Preparing for the procedure Follow the instructions exactly about when to stop eating and … of the procedure, take them with only a sip of water. Follow your doctor's instructions about when to bathe or shower …
Medical tests
… the spine in the neck (cervical), upper back (thoracic), or lower back (lumbosacral). The entire spine can be seen in … as the lumbar spine, may be taken. MRI may be used to check low back problems. There are two main types of MRI—the … a bone scan . Find areas of the spine that do not have good blood supply. Find an infection. Find nerve damage caused by …
Medical tests
… that covers the brain and spinal cord. Problems with the blood vessels to the spine. This test may help find the … increase the amount of water you drink before the test. Follow the instructions your doctor gives you about eating and … all or most of your clothes above the waist. (You may be allowed to keep on your underwear if it doesn't get in the way …
Medical tests
… a thin viewing tool called an arthroscope, or scope. It allows the doctor to see the joint surfaces and the tough … (which is done using a larger incision), arthroscopy allows your doctor to see what is wrong with your joint. But … tests may include X-rays , ultrasound, CT scan , MRI , or blood tests. Do surgery to repair a joint problem. It may be …
Medical tests
… is injected into a vein in your arm. It moves through your bloodstream and into certain tissues. These tissues include … of the tracer in your tissues. The camera may move slowly above and around your body. The camera does not … find it hard to stay still during the scan. Ask for a pillow or blanket to make yourself as comfortable as you can …
Medical tests
… cardiac calcium scoring. The coronary arteries supply blood to the heart muscle. Normally, the coronary arteries … cancer from being exposed to small amounts of radiation is low. It is not a reason to avoid these tests for most … arteries of the heart when it is not true. People with a low chance of heart disease are most likely to have a …
