HESI MCA I Practice Test

Uric acid stones form when the concentration of uric acid in urine becomes high enough to exceed its solubility, which is driven when the body produces more uric acid and the kidneys excrete it. A large intake of dietary proteins provides many purines, which are metabolized into uric acid. The more purines you consume, the more uric acid is produced and excreted by the kidneys, increasing the amount in urine and the chance that uric acid will precipitate as stones, especially in urine that’s acidic. So this option is the best fit because it directly raises the uric acid load entering and leaving the kidneys, setting the stage for stone formation. The other factors don’t directly boost uric acid production and excretion in the same way. Smoking and HIV infection don’t specifically drive uric acid stone formation, and while chronic analgesic use can affect kidney health, it doesn’t point to uric acid excretion as the primary mechanism.