Rutherford - Acute Limb Ischemia (ALI) Interactive Calculator

Rutherford Classification Calculator for ALI

Use clinical findings in each section to map to Rutherford for Acute Limb Ischemia categories I, IIa, IIb, III. Exact table matches are prioritized; off-table combinations use a conservative escalation and this will be stated.

1. Sensory loss (choose best match)

None

No sensory deficit.

Minimal — toes only

Paresthesia limited to toes (often IIa).

More than toes

Sensory loss beyond toes (forefoot/foot).

Profound / anesthetic

Anesthesia of limb (suggests irreversible injury — III).

Please select the best sensory response.

2. Motor function

None

No motor deficit.

Mild weakness

Slight weakness but preserved function.

Moderate weakness

Clear functional impairment (reduced power).

Profound / paralysis

Marked paralysis — sign of irreversible ischemia.

Please select the best motor response.

3. Arterial Doppler signal

Audible

Triphasic/pulsatile arterial signals on handheld Doppler.

Inaudible

No arterial Doppler signal at ankle/pedal.

Please select arterial Doppler status.

4. Venous Doppler

Audible

Venous Doppler present.

Inaudible

Venous signal absent (seen with severe/irreversible ischemia).

Please select venous Doppler status.

Optional objective items

Primary classification uses sensory, motor and Doppler signals (NCBI Table 20.3). Optional inputs only modify tie-breaking toward worse category if suspicious.

Escalation applied

Primary source: NCBI Table 20.3 — Rutherford ALI classification.

Why this category? (click to expand)

Disclaimer: This tool provides general classification guidance only and is not a substitute for specialist assessment. Use in conjunction with clinical judgement.