What is the recommended urine output for individuals with nephrolithiasis?

For individuals with nephrolithiasis, increasing urine output is a key strategy in the prevention and management of kidney stones. The recommended goal is to achieve a urine output of at least 2 liters per day. This increased volume helps dilute the concentration of stone-forming substances in the urine, thereby reducing the risk of stone formation. Maintaining such hydration can also facilitate the passage of existing stones.

Upping fluid intake not only helps in preventing the crystallization of minerals but also aids in flushing out any small stones that may be present. An output of 2 liters or more underscores the importance of hydration as a preventive measure for patients predisposed to urinary stone disease. While higher outputs, like 3 to 4 liters, may be beneficial in certain circumstances, the guideline recommends a minimum of 2 liters daily for effective stone prevention in the general nephrolithiasis population.