What is the best method to assess fluid excess in a child with AGN?

Daily weight is the most reliable method for assessing fluid excess in a child with acute glomerulonephritis (AGN). Weight changes directly reflect fluctuations in body fluid status, which is crucial in managing conditions like AGN where fluid balance is often affected due to kidney function impairments.

Monitoring a child's weight daily can help healthcare providers gauge whether there is an increase in fluid retention, which might indicate fluid excess. This is particularly important because weight gain can occur rapidly in cases of fluid overload, allowing for timely interventions if necessary.

While daily blood pressure measurements can provide insights into the child's cardiovascular status and may hint at fluid shifts, they do not directly measure fluid excess. Checking appetite might help indicate a child’s general well-being or response to treatment but is not a specific measure of fluid status. Fluid intake calculation gives some idea of how much fluid is taken in but does not reflect the body’s total fluid balance.

Thus, daily weight is the most effective and direct method for assessing fluid excess in this scenario.