FA-64577 / Clinical triage scoring / Member archive

Burn surface area estimate and first-window fluid rate: major burn threshold · case 02

An adult with exactly 20% TBSA is classified as a minor burn.

Member previewVariant 2 · 3 implementations · 8 checks per implementation

Case contract

Input {age_years (int), weight_kg, regions {name: fraction burned}, hours_since_burn}. Toy rule of nines: arms 9, trunk front 18, trunk back 18, perineum 1; age >= 10 head 9 and each leg 18; age < 10 head 18-age and each leg (27+age)/2. TBSA = sum(region % x fraction). Major burn when TBSA >= 20 (age >= 10) or >= 10 (age < 10); minor burns return total_ml 0 and no rate. Major: total = 4 mL x kg x TBSA; half is given over the remainder of the first 8 hours measured from the burn; rate is null once 8 hours have passed. Return {tbsa (1 dp), major, total_ml, first_rate_ml_h (1 dp)}.

Why this case matters

Burn triage depends on age-adjusted body proportions and on timing fluids from the injury rather than arrival.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
adult exactly 20 percent	`{"first_rate_ml_h": null, "major": false, "tbsa": 20.0, "total_ml": 0}`	`{"first_rate_ml_h": 493.3, "major": true, "tbsa": 20.0, "total_ml": 5920}`	Failed

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