The NG and NJ tubes are placed to provide external nutrition when the patient cannot eat and drink, especially in cases of nutrition for infants and children. The NG tube is the nasogastric tube passed from the nose into the esophagus. This procedure is simple and can be repeated at home after training. The NJ tube is the nasojejunal feeding tube passed from the nose to the small intestine. Again, this is a complicated procedure and can only be changed in a medical setting.