Remain in bed each morning until specimen collection has been completed to prevent premature emptying of stomach contents. You may be asked not to take this medication before the test. The tube passes more easily if you relax and follow instructions about breathing and swallowing. Passing the tube through the nose into the throat then into the stomach is uncomfortable. Discomfort from the tube ceases when the tube is withdrawn.
Discomfort disappears when the test is finished.
Equipment used Water-soluble lubricating jelly. Disposable plastic nasogastric tube. Description of test Sit upright. A flexible, lubricated tube is passed through your nose. Bend your neck slightly forward, and swallow the tube when it advances to the back of your throat.