A client with a history of inflammatory bowel disease develops severe ulcerative colitis and is admitted to the intensive care unit after surgery for a fistula repair. Which intervention is most important for the nurse to include in the plan of care?

A. While assessing skin condition is important, the priority in this case is managing fluid balance, especially after surgery. B. Replacing fluids intravenously based on intake and output is crucial to ensure the client is adequately hydrated and to prevent complications related to fluid loss, particularly after surgery for ulcerative colitis. This is vital in maintaining homeostasis and promoting healing. C. Recording the amount of wound drainage is important for monitoring healing, but it is secondary to managing fluid balance postoperatively. D. Turning the client every 2 hours is important for preventing pressure injuries, but in this context, ensuring proper fluid management takes precedence.