No changes necessary. When it reaches the rear of your throat, you will probably cough or gag. Lubricant on the tubing has an unpleasant taste. Discomfort disappears when the test is finished. 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 through the esophagus and stomach to the duodenum. I.V. glucagon is started or an intramuscular injection of an anti-cholinergic drug is given. Barium is passed into the duodenum through the catheter. X-ray spot films are made.