Inputs

Fill what you have — the calculator updates live. Respiratory abnormality scores once using either RR (<10 or ≥30) or SpO₂ < 90%.

Age (years)

Systolic BP (mmHg)

Glasgow Coma Scale (3–15)

Respiratory Rate (breaths/min)

SpO₂ (%) — optional (adds points if < 90%)

Heart Rate (beats/min)

Penetrating injury High‑velocity trauma (RTC with intrusion/ejection/death in same compartment; vehicle vs pedestrian/cyclist; fall >3 m; blow/blast)

Result

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Below TXA threshold

Scoring breakdown

BATT is not suitable for isolated limb trauma or isolated neck of femur fracture in the elderly.
Evidence supports prehospital TXA when BATT ≥ 2; give per local/JRCALC protocol and as early as possible (ideally <1 h and always <3 h from injury).
This tool does not replace clinical judgement or local governance.