Final answer:
The nurse should restrict oral intake to clear fluids and place the client in semi-Fowler's position.
Step-by-step explanation:
The nurse in the emergency department should take the following action for a client with appendicitis:
- Restrict oral intake to clear fluids: This is done to prevent further irritation to the inflamed appendix and to prepare the client for possible surgery.
- Place the client in semi-Fowler's position: This position helps to relieve pain and promote comfort by reducing intra-abdominal pressure.