Final answer:
The nursing diagnosis suggested by the weight gain of 3 pounds in a patient being treated for AKI is Excess fluid volume.
Step-by-step explanation:
The nursing diagnosis suggested by the assessment finding of a weight gain of 3 pounds over the past 48 hours in a patient being treated for AKI is Excess fluid volume.
AKI, or acute kidney injury, can cause the body to retain fluid, leading to fluid overload. This can result in weight gain. Excess fluid volume is a nursing diagnosis that refers to the imbalance between the intake and output of fluids in the body. It is important for the nurse to monitor the patient's fluid status closely and implement interventions to promote fluid balance, such as diuretic therapy and fluid restrictions.