Reasoning GP Tools Diagnostic Tool
Reasoning Tool · Triage + Differential, by presentation

Diagnostic tool — how urgent & what is it, by presenting complaint

Pick a presenting complaint below. Selected presentations open a live triage + differential workup — tick what the patient describes and the engine surfaces every NICE / Macmillan triage rule that fires and ranks the differential live. Every other presentation opens its structured visual pathway.

🚦 Triage

NICE NG12 / Macmillan rapid-referral / CKS thresholds. Headline = highest-acuity rule fired; every fired rule listed by tier with patient phrase, copy-paste referral text and proforma link.

🩺 Differential

Feature-weighted ranking against ICHD-3 / SNNOOP10 / TiTrATE / NICE CKS criteria. Three views: % likelihood, Most-likely / Consider / Don't-miss buckets, or Pro / Con per diagnosis. Red-flag diagnoses always surface when their triggers fire.

Choose a presenting complaint

Live workups run the interactive triage + differential engine. The remaining presentations open their structured algorithm pathway in the Algorithms library.

— / — presentations
Live triage + differential workup Visual algorithm pathway
No presentation matches that search. Try a symptom or condition name.

Live workup

Showing the interactive engine for the selected presentation. Pick another live presentation above to switch — your inputs reset for the new complaint.

1 · Pick the presenting complaint

Browse or search the grouped list. Teal cards run the live workup; the rest open a structured visual pathway. A live card also offers a small “pathway ↗” link to its algorithm.

2 · Tick what you've found

For live workups: symptoms · vitals · blood results · context. The merged input panel shows every feature either engine needs — ticked once, used by both.

3 · Read the verdict

Triage verdict sits on top — that's the safety net. The differential ranks beneath. Switch the DDx between % / Buckets / Pro-Con from the top-right.

4 · Act on it

Expand any diagnosis card for the key examination finding, the next investigation that confirms/refutes, the NICE CKS link, and the matching full case on Reasoning GP.

Educational use only. The Diagnostic Tool surfaces published NICE / Macmillan triage thresholds (triage view) and tunes feature weights to ICHD-3 / SNNOOP10 / TiTrATE / NICE CKS criteria (differential view). Visual pathways are structured reference flows anchored to NICE / CKS guidance. None of this is a validated clinical decision rule — always confirm with full history, examination, and your local pathway.