Kidney Stone Analysis
Use
Used for managing patients with recurrent renal calculi (kidney stones). The test provides a quantitative report of stone composition, which can inform diagnosis and guide treatment decisions such as assessing the significance of supersaturation for calcium oxalate stones and detecting infection-related struvite stones, as well as aiding recognition of complex crystal mixtures and hydration states. It also identifies ephedrine/guaifenesin stones linked to over‑the‑counter substances. Interpretation of the results requires understanding of stone formation dynamics and composition to target appropriate clinical management. ([mayocliniclabs.com](https://www.mayocliniclabs.com/test-catalog/Overview/605761?utm_source=openai))
Special Instructions
Specimens must be cleaned of blood or foreign material, dried for at least 24 hours, and shipped in a screw‑capped plastic container—not a bag. Source and side (e.g., left kidney, bladder) must be clearly indicated on container. A Stone Analysis Collection Kit (T550) and specific patient collection and packaging instructions must be used. ([mayocliniclabs.com](https://www.mayocliniclabs.com/test-catalog/Overview/605761?utm_source=openai))
Limitations
No significant cautionary statements listed, though accurate interpretation is complex. Hydration state and mixed composition may affect analysis. ([mayocliniclabs.com](https://www.mayocliniclabs.com/test-catalog/overview/605761?utm_source=openai))
New York Approved
Methodology
Other
Biomarkers
LOINC Codes
- 74446-6
- 40787-4
- 56119-1
- 77202-0
Result Turnaround Time
4-6 days
Related Documents
For more information, please review the documents below
Specimen
Other
Volume
Entire dried calculi specimen
Minimum Volume
Entire stone
Container
Screw‑capped plastic container (stone not in bag)
Collection Instructions
Clean any blood or foreign material with deionized water, dry at ambient temperature at least 24 hours, transfer to screw‑capped plastic container, indicate source on container
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 2 years |
| Refrigerated | 1 year |
| Frozen | 1 year |