It is common for patients who suffer their first urinary stone to experience subsequent stone episodes.

Consequently, secondary prevention has an important role, and this involves identifying and optimizing modifiable risk factors. The primary way to do this is with a 24-hour urine collection that is analyzed for various promoters and inhibitors of urinary stone formation.

However, there have been no recommendations regarding 24-hour urine collections from U.S. professional organizations.

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A study presented at the 33rd Congress of the Societé Internationale d’Urologie found that 24-hour urine collections were requested for only about 8% of patients at high risk of stone recurrence in 2006, the last year for which researchers had data. 

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