Table 5.2

Surveillance of Known Lower Extremity PAD

IndicationAppropriate Use Score (1–9)
New or Worsening Symptoms
115.
  • Normal baseline study

A (7)
116.
  • Abnormal baseline ABI (i.e., ABI ≤0.90)

A (8)
No Change in Symptom Status (No revascularization)
Asymptomatic or Stable Symptoms After Baseline Study, Surveillance Frequency During First YearAt 3 to 5 monthsAt 6 to 8 monthsAt 9 to 12 months
117.
  • Normal baseline ABI (no stenosis)

I (1)I (1)I (1)
118.
  • Mild or moderate disease (e.g., ABI >0.4)

I (2)I (2)U (4)
119.
  • Severe (e.g., ABI <0.4)

I (3)U (5)U (5)
Asymptomatic or Stable Symptoms After Baseline Study, Surveillance Frequency After First YearEvery 6 monthsEvery 12 monthsEvery 24 months or greater
120.• Normal baseline ABI (no stenosis)I (1)I (1)I (2)
121.• Mild or moderate disease (e.g., ABI >0.4)I (2)I (2)U (4)
122.• Severe (e.g., ABI <0.4)U (4)U (4)I (3)

A = appropriate; ABI = ankle-brachial index; I = inappropriate; PAD = peripheral artery disease; U = uncertain.