The correct answer is by "performing daily weights at the same time each day".
If the nurse measures only the patient's oral fluid intake it will not be a sufficient fluid balance estimation, since she will need to measure also the fluid output.
By assessing the skin's turgor, the nurse will estimate the dehydration or fluid loss, but this measurement is not as accurate as measuring the weight of the patient every day.
In addition, a measurement of the blood urea nitrogen (BUN) and creatinine levels will show whether the patient has normal and healthy kidney function.
From all these measurements, a daily measurement of the weight is the most accurate way to assess the fluid balance.
