Which ABI value indicates multi-level disease or long segment occlusion?

Which ABI value indicates multi-level disease or long segment occlusion?

• A. <0.80 probable claudication
• B. <0.30 ischemic rest pain
• C. <0.95 abnormal
• D. <0.50 multi-level disease or long segment occlusion

Answer: (D)

Ankle-brachial index reflects leg perfusion by comparing ankle systolic pressure to arm systolic pressure. The lower the ABI, the more severe and extensive the arterial disease. When disease is widespread—such as multilevel disease or a long-segment occlusion—the distal pressures drop to very low levels. An ABI below 0.50 is most strongly associated with this pattern, making it the best indicator that the disease is not limited to a single segment but involves multiple levels or a long occlusion. Values around 0.80 point to PAD with claudication risk but don’t specifically imply multilevel involvement; around 0.30 is tied to ischemic rest pain and more advanced symptoms; and a value near 0.95 would be considered near-normal rather than indicating extensive disease.

Ankle-brachial index reflects leg perfusion by comparing ankle systolic pressure to arm systolic pressure. The lower the ABI, the more severe and extensive the arterial disease. When disease is widespread—such as multilevel disease or a long-segment occlusion—the distal pressures drop to very low levels. An ABI below 0.50 is most strongly associated with this pattern, making it the best indicator that the disease is not limited to a single segment but involves multiple levels or a long occlusion. Values around 0.80 point to PAD with claudication risk but don’t specifically imply multilevel involvement; around 0.30 is tied to ischemic rest pain and more advanced symptoms; and a value near 0.95 would be considered near-normal rather than indicating extensive disease.