INTERPRETATION OF ABPI
| ABPI* | INTERPRETATION |
|---|---|
| >1.3 | Arterial calcification may be present |
| >1.0-1.3 | Probably no peripheral arterial disease |
| 0.81-1.00 | No significant or mild peripheral arterial occlusive disease |
| 0.51-0.80 | Moderate peripheral arterial occlusive disease |
| <0.5 | Severe peripheral arterial disease ‘critical ischaemia‘ |
Ankle brachial pressure index (ABPI) = ankle systolic blood pressure ÷ brachial systolic blood pressure
N.B: ABPI >1.3 may indicate arterial calcification, therefore toe pressure maybe more useful.
*Critical ischaemia: A globally accepted definition of critical ischaemia is awaited. Criteria widely used in clinical research do not use ABPI but use ankle or toe systolic pressures (≤50mmHg or ≤30mmHg, respectively) in combination with persistent, recurring rest pain despite regular analgesia for >2 weeks or ulceration or gangrene of the foot or toes (Harding et al., 2015).