Motility Diagnostic Procedures
Call 415-600-3676 to register by phone within five (5) days of your appointment.
Please Check in 15 minutes before your appointment at:
California Pacific Medical Center
2333 Buchanan St. 5th floor GI Lab
San Francisco, CA 94115
Please bring your insurance card(s).
- STOP EATING at least six (6) hours before your procedure. STOP DRINKING all fluids at least four (4) hours before your procedure. You may take necessary medication with sips of water.
- If you have diabetes and take insulin, do not take your morning dose on the day of the examination. Check your finger-stick glucose before leaving home and notify the nurse of the results upon arrival to the endoscopy suite. Bring your blood glucose meter and your home insulin dosing with you in case the nurse needs to treat you.
This procedure will take approximately one to two (1 – 2)hours. No sedation will be given and you will not need a driver to take you home.
Electrogastrogram (EGG) Description
What is an electrogastrogram?
An electrogastrogram is similar to an electrocardiogram (EKG) of the heart. It is a recording of the electrical signals that travel through the muscles of the stomach and control the muscles’ contraction.
When is an electrogastrogram used?
An electrogastrogram is used when there is a suspicion that the muscles of the stomach or the nerves controlling the muscles are not working normally. Usually this suspicion arises when there is a problem with recurrent nausea and vomiting, signs that the stomach is not emptying food normally. If the electrogastrogram is abnormal, it conforms that the problem is probably to the stomach’s muscles or the nerves that control the muscles. The electrogastrogram can be considered an experimental procedure since its exact role in the diagnosis of diseases of the stomach has not been defined yet.
How is an electrogastrogram done?
The nurse will prep your abdomen with gel and several electrodes will be placed on your abdomen. The electrodes sense the electrical signals coming from the stomach’s muscles, and the signals are recorded on a computer for analysis. While you are lying on your back, recordings will be obtained both while you are fasting and after drinking Ensure or Glucerna. The length of the study will be one to two hours.
How are the results of the results of the electrogastrogram evaluated?
In normal individuals there is a regular electrical rhythm generated by the muscles of the stomach—just as in the heart—and the power (voltage) of the electrical current increases after the meal. In patients with abnormalities of the muscles or nerves of the stomach, the rhythm often is irregular or there is no post–meal increase in electrical power.
Are there any side effects of an electrogastrogram?
There are no side effects. The study is painless.
Are there alternatives to the electrogastrogram?
No, there are no alternatives; however, other studies, for example, antroduodenal motility studies or gastric emptying studies may give additional information since abnormal electrical activity of the stomach often results in abnormal muscular activity and reduced emptying of food from the stomach.