Prior to Test
Leading up to the test, your doctor may instruct you to:
- Avoid eating or drinking (not even water) for at least 6 hours before the test.
- Take a special cleansing solution, laxative, or enema. This will clean out your intestines. You may also be asked to follow a clear liquid diet.
- Arrange for a ride home after the test if you have to take a sedative.
In most cases, it is okay to take aspirin and other blood-thinning medications before the test. Ask your doctor if you take these medications.
Description of the Test
Your doctor may spray your throat with a local anesthetic. This will numb your throat, so you will not feel discomfort. You may also be given a sedative. This will help you to relax and reduce anxiety.
In most cases, you will lie on your left side. A thin, flexible tube, called an endoscope, will be inserted either through your throat or anus. The endoscope will have an ultrasound probe on the end of it. The ultrasound machine will create images of the digestive tract. When the imaging is done, your doctor will gently pull the endoscope out.
In some cases, the doctor might use the ultrasound to help take a biopsy or drain a cyst. If this happens, the doctor will insert tools through the endoscope to the area.
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