Imperial Collage Healthcare

Renal stone analysis (calculi)

Lab Code : STONE

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
See report

Sample Required
Renal stone

Sample Volume
Ideally 10 mg

Turnaround Time
Up to 3 weeks

Not currently performed in house; this is a referred test. Full clinical details should be supplied.

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