To prevent contamination of the specimen, spit out excess saliva. You may be asked not to take this medication before the test. Put on surgical gown. 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.
Equipment used Nasogastric tube. Sterile needle with syringe. 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.