Final answer:
The nurse should plan a high-protein and low-carbohydrate diet, encourage small meals, and advise lying down after meals to manage dumping syndrome following gastrectomy.
Step-by-step explanation:
The nurse should plan an intervention to manage dumping syndrome following gastrectomy. One important intervention is to advise the patient to consume a high-protein and low-carbohydrate diet instead of a high-carbohydrate diet. This helps to minimize the osmotic water loss and reduce the symptoms of dumping syndrome.
The nurse should also encourage the patient to eat small, frequent meals rather than consuming large meals. Eating smaller portions helps to regulate the flow of chyme from the stomach to the small intestine and prevents overwhelming the duodenum.
Additionally, the nurse should advise the patient to lie down for at least 30 minutes after meals. This helps to slow down the movement of food through the digestive tract and reduce the symptoms of dumping syndrome.