FA-64812 / Clinical triage scoring / Member archive

Cervical spine imaging decision rule: bilateral rotation requirement · case 02

A patient who can only rotate to one side is cleared.

Member previewVariant 2 · 3 implementations · 10 checks per implementation

Case contract

Input {age, gcs, dangerous_mechanism, paresthesias, simple_rear_end, sitting, ambulatory, delayed_onset, no_midline_tenderness, rotate_left, rotate_right (degrees)}. Toy rule: age < 16 or gcs < 15 NOT_APPLICABLE. High risk (age >= 65, dangerous mechanism or paresthesias) -> IMAGE. If none of the low-risk factors (simple rear-end collision, sitting, ambulatory, delayed onset, no midline tenderness) is present -> IMAGE. Otherwise NO_IMAGE when active rotation reaches 45 degrees both left and right, else IMAGE. Return {decision}.

Why this case matters

Imaging decision rules chain any-of and all-of gates; confusing the quantifiers or thresholds is a distinct defect at each gate.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
rotation limited to one side	`{"decision": "NO_IMAGE"}`	`{"decision": "IMAGE"}`	Failed

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