Description of test You or a close relative will be required to sign a consent form after the procedure has been explained to you. Relax as much as possible. Lubricated tube is passed through the nose, down and back into the throat. When the tube causes gagging, bend forward and sip water or ice chips. The tube is advanced into the stomach and stomach contents are aspirated.
Skin is cleaned with antiseptic.
Pentagastrin is injected just under the skin. If you experience abdominal pain, nausea, vomiting, faintness or numbness of hands and feet, tell the doctor immediately. Specimens are sent to the laboratory for analysis. If you have a sore throat, use throat lozenges. Activity after test After the nasogastric tube is removed, you are observed for nausea, vomiting and abdominal distention.