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HelpOrder Code LABKIDST Kidney Stone Analysis
Necessary Information
Specimen source is required.
Specimen Required
Supplies: Stone Analysis Collection Kit (T550)
Sources: Bladder, kidney, prostatic, renal, or urinary
Specimen Volume: Entire dried calculi specimen
Collection Instructions:
1. Have patient collect specimen using the Patient Collection Instructions for Kidney Stones.
2. For detailed instructions on kidney stone preparation and packaging, see Kidney Stone Packaging Instructions.
3. Prepare stone by cleaning any blood or foreign material from the stone with deionized water.
4. Place stone on a clean filter or paper towel and let dry at ambient temperature for a minimum of 24 hours.
5. Do not place stone directly in a bag. If specimen is received in a bag, either transfer stone into a screw-capped, plastic container or place bag containing stone in a screw-capped, plastic container.
6. Indicate source of specimen on the outside of the container (eg, left kidney, bladder, right ureter).
7. Repeat steps 2 through 5 for each stone received.
Specimen Stability Information: Ambient (preferred) 2 years/Refrigerated 1 year/Frozen 1 year
Forms
If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:
-General Request (T239)
-Renal Diagnostics Test Request (T830)
Useful For
Managing patients with recurrent renal calculi (kidney stones)
Testing Algorithm
Upon arrival in the performing laboratory, all stone specimens and the containers in which they are received will be inspected. Prior to analysis, stones must be clean and dry.
Special Instructions
Method Name
Infrared Spectrum Analysis
Reporting Name
Kidney Stone AnalysisSpecimen Type
StoneSpecimen Minimum Volume
Entire stone
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Stone | Ambient (preferred) | ||
| Frozen | 365 days | ||
| Refrigerated | 365 days | ||
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Reference Values
The presence of a kidney stone is abnormal. A quantitative report will be provided after analysis.
Method Description
Representative specimens are taken from all identifiable layers of the calculus (stone). Each specimen is crushed into a fine powder. An infrared spectrum of each specimen is recorded, and the resulting spectrum compared against reference spectra of all known calculus components. This procedure allows for accurate analyses of complex crystal mixtures as well as the hydration state of each crystal type.(Hesse A, Bach D: Stone analysis by infrared spectroscopy. In: Rose GA, ed: Urinary Stones: Critical and Laboratory Aspects. University Park Press; 1982; Gambaro G. Croppi E, Coe F, Consensus Conference Group, et al. Metabolic diagnosis and medical prevention of calcium nephrolithiasis and its systemic manifestations: a consensus statement. J Nephrol. 2016 Dec;29(6):715-734)
Day(s) Performed
Monday through Saturday
Performing Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
82365