In CKD, what parameter helps monitor fluid status reliably in edema management?

• A. Urine output measurement.
• B. Serum creatinine measurement.
• C. Daily weights.
• D. Blood pressure alone.

Answer: (C)

Daily weights most reliably reflect fluid status in CKD edema management. Changes in body weight directly track net fluid gain or loss, since roughly 1 kilogram of weight represents about 1 liter of fluid. To use this measure effectively, weigh yourself at the same time each day, after voiding, with similar clothing, and compare to the dry weight or baseline. Small weight upticks can signal fluid overload before noticeable edema appears, guiding adjustments in diuretics or dialysis ultrafiltration.

Other measures don’t reliably reflect fluid status on their own. Urine output can vary with kidney function and medications and doesn’t capture total body fluid status. Serum creatinine indicates kidney filtration, not current volume status. Blood pressure may be influenced by many factors and doesn’t consistently reflect edema or fluid overload. Daily weights provide a simple, objective, and timely read on fluid balance.