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Renal stone analysis (calculi)

Category Biochemistry >> Metabolic
Test background

Kidney stones are solid accretions of dissolved minerals in urine found inside the kidneys or ureters. These are subsequently expelled in the urine stream, leading to ureteric obstruction and distension. Stones form around a central nidus from which a crystalline structure expands and are typically derived of calcium salts (of which calcium oxalate predominates). Other examples of calculi include the (urea-splitting) bacterially-derived struvite (Mg, NH4 and PO4), uric acid and cystine.

Clinical Indications

All renal calculi should be analysed Symptoms of nephrolithiases include: renal colic, (acute and spasmodic flank pain) nausea, UTI, haematuria and vomiting

Reference range

We provide fully quantitative reporting of all major stone components. Results are reported as weight of stone, description and percentage composition.

Sample & container required Renal stone
Sample volume Ideally 10 mg
Sample collection

Sterile universal

Transport storage Stable at ambient temperature, send by first class post.
Turnaround time 2 weeks