Final answer:
The nurse should inform the client about the duration of the procedure, the use of a nasogastric tube, and the fasting period before an upper gastrointestinal (UGI) series.
Step-by-step explanation:
The nurse should include several pieces of information in the teaching plan for an upper gastrointestinal (UGI) series. Firstly, the x-ray procedure may last for several hours, during which the client will need to remain still. Secondly, a nasogastric tube (NGT) is inserted to instill the barium, a contrast material that helps visualize the digestive system. Lastly, nothing by mouth is allowed for 6 to 8 hours before the study to ensure the stomach and intestines are empty, allowing for better visualization on the x-ray.