What is the primary concern with excessive fluid intake in postoperative patients?

Excessive fluid intake in postoperative patients primarily raises concerns about fluid overload leading to complications. After surgery, the body may have a diminished capacity to handle additional fluids due to factors like altered kidney function, inflammation, or the body's stress response. When too much fluid is given, it can result in pulmonary edema, congestive heart failure, or even worsening of preexisting conditions such as hypertension or heart disease. Monitoring fluid intake is critical to balance adequate hydration while preventing these potentially dangerous complications.

The other options, while significant in their own contexts, do not directly address the primary risk associated with excessive fluid intake. Infection risk can arise from various factors unrelated to fluid intake. Hypotension, often caused by inadequate fluid levels or other factors, is not typically a direct result of excessive fluid administration. Weight loss is generally not a concern in the immediate postoperative period, as the focus tends to be more on managing fluid balance rather than weight management.