Ankle Brachial Index (ABI) Calculator

  1. Lay patient flat.
  2. Attach blood pressure cuff to arm or distal calf
  3. Inflate cuff to pressure until no flow is heard by doppler
  4. Slowly lower pressure, until you hear flow, and record this number

Formula: ABIR = (Max of R leg DP / PT pressures) / (Max of L and R arm pressures)