What is the Tiselius activity product ratio?

APR-CaOx uses 24h urine calcium, oxalate, magnesium, citrate, and urate values. APR >1 indicates supersaturation for CaOx crystallization. APR reduction to <1 is the therapeutic goal.

How does the Tiselius index guide therapy?

APR can be used to monitor response to dietary modifications and pharmacotherapy. Reduction in calcium, oxalate, or increase in citrate should reduce APR. Sequential 24h urines track treatment efficacy.

Is the Tiselius index clinically widely used?

Tiselius APR is well-validated for CaOx stones (most common type, 70-80%). It is used in specialized stone centers in Europe. EQUIL software provides comprehensive stone-forming potential assessment.

Tiselius Risk Index Supersaturation

Calculate Tiselius activity product ratio (APR) for calcium oxalate stone formation from 24h urine parameters. APR >1 indicates supersaturation and active lithogenic risk.

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24h Urine Stone Risk

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Tiselius Risk Index Supersaturation

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Frequently Asked Questions

What is the Tiselius activity product ratio?

How does the Tiselius index guide therapy?

Is the Tiselius index clinically widely used?