Stone Analysis is a specialized laboratory test used to determine the chemical composition of kidney stones, urinary tract stones, renal calculi, ureteric stones, bladder stones, or passed urinary calculi. This test helps identify the major and minor components of the stone, such as calcium oxalate, uric acid, struvite, cystine, calcium phosphate, or mixed crystal compositions, which is essential for understanding the cause of stone formation, guiding treatment, and helping prevent recurrent kidney stones. Modern reference laboratories commonly use Fourier Transform Infrared Spectroscopy (FTIR) or, in some centers, X-ray diffraction (XRD) because these methods are preferred over older chemical methods for more accurate stone composition analysis. Mayo Clinic Laboratories describes kidney stone analysis using infrared spectroscopy, where representative layers of the calculus are powdered and compared against known reference spectra, while urology literature notes that FTIR or XRD are the preferred analytical procedures for urinary stone composition. Stone analysis is especially useful in patients with first-time stone passage, recurrent nephrolithiasis, family history of stones, pediatric stone disease, metabolic stone disorders, or post-surgical stone retrieval, and results are often used with urine metabolic evaluation, 24-hour urine studies, and urology/nephrology consultation to reduce recurrence risk.
Fasting
Not Required
Reporting Time
7–10 Days
Gender
Male/Female
Age Group
5-99 yrs.
✔ Home collection available ✔ No hidden charges
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