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Home/Clinical calculators/Stone Risk Assessment (24-Hour Urine)

Clinical calculator · Urology

Stone Risk Assessment (24-Hour Urine)

Identifies metabolic abnormalities in 24-hour urine to guide targeted prevention of recurrent nephrolithiasis

Highest activation tier
Recommended
How it is scored
Scored in code; a stated value is compared only from the structured summary or a supplied value
Scoring type
point sum
Care settings
Outpatient

When it activates

Scribeable activates a calculator from the encounter. The Stone Risk Assessment (24-Hour Urine) can activate when the transcript or pasted chart context documents any of these:

  • Kidney stone metabolic evaluation
  • Recurrent nephrolithiasis workup
  • 24-hour urine analysis interpretation
  • Stone prevention planning
  • Renal calculus risk stratification

A coded diagnosis can also activate it. ICD-10 prefixes carried by the registry: N20, N21.

Inputs the note needs

6 inputs. Each is resolved from the transcript, the pasted chart context and charted labs; at this calculator’s tier a missing input is never requested, and a missing required input keeps the score out of the draft.

InputTypeUnit / optionsGuidance
Urine volume <2L/daylab
Urine calcium >250mg/day (women) or >300mg/day (men)lab
Urine oxalate >40mg/daylab
Urine citrate <320mg/daylab
Urine uric acid >750mg/day (women) or >800mg/day (men)lab
Urine sodium >200mEq/daylab

Reference for licensed clinicians. Where the registry text carries dose thresholds or conversion factors, they are as published in the cited sources. This page is not a prescribing tool and not individualised medical advice; verify against a current drug reference and the current guideline before acting. Medical disclaimer.

Scoring

Count of abnormalities present (0-6): low urine volume, hypercalciuria, hyperoxaluria, hypocitraturia, hyperuricosuria, high urine sodium. Each positive factor = 1 point.

Interpretation

Score 0: Low risk — general dietary counseling, hydration. Score 1-2: Moderate risk — targeted intervention for specific abnormalities. Score 3+: High risk — aggressive medical management. Per abnormality: Low volume → increase fluids to >2.5L/day. Hypercalciuria → low-sodium diet, thiazide diuretic. Hyperoxaluria → low-oxalate diet, calcium with meals. Hypocitraturia → potassium citrate supplementation. Hyperuricosuria → limit animal protein, consider allopurinol. High sodium → restrict to <2300mg/day (drives calciuria).

Evidence

Sources carried in Scribeable's citation registry for this calculator; guideline version: AUA Stone 2014.

  • Pearle MS et al. Medical management of kidney stones: AUA guidelineAUA Stone Risk 2014 · 2014 · AUA · Guideline · link last verified 2026-03-28

How Scribeable handles it in the note

When an encounter activates the Stone Risk Assessment (24-Hour Urine) (its highest tier is recommended), Scribeable does not ask you for missing inputs. The score is computed in code from whatever inputs resolve from the transcript, the pasted chart context or charted labs; a computed value is written into the draft only when every required input already resolves.

The score is computed in code from the resolved inputs, not recalled by the language model. A stated Stone Risk Assessment (24-Hour Urine) value is compared against the computed one when the draft's structured summary carries it; a disagreement found there is flagged to the second drafting pass, which is instructed to correct the score and its interpretation, unless Scribeable has supplied the computed value to that pass, in which case the value the draft writes is checked against the supplied one and a detected difference is shown beside the note for you to adjudicate rather than silently rewritten.

Classified as a risk score: activated strictly, by a documented trigger, never by a permissive reading of the encounter.

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Can activate in: Internal Medicine, Urology.

Scored in code

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