For educational and reference use only. These calculators do not replace clinical judgement, local protocols, or a qualified clinician. Verify every result independently before it informs patient care.
Musculoskeletal imaging
AO Spine (Thoracolumbar)
AO Spine thoracolumbar injury classification: morphological fracture type. (Neurological status N and case-specific M modifiers are recorded separately.)
Result
A1
Type A: compression injuries (severity A0 < A1 < A2 < A3 < A4).
Formula
Type A (compression: A0–A4) < Type B (tension band: B1–B3) < Type C (translation).
Disclaimer
Morphology only. Add the neurological modifier (N0–N4, NX, and “+” for continued spinal cord compression) and the case-specific modifiers (M1 indeterminate tension band, M2 patient-specific comorbidity) for the full classification and treatment decision.
For educational and reference use only. These calculators do not replace clinical judgement, local protocols, or a qualified clinician. Verify every result independently before it informs patient care.
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