The measurement glossary of PW mode

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The glossary of “Auto Measure”

  • HR (bpm):Heart rate
  • PSV (cm/s):Peak systolic velocity
  • EDV (cm/s):End diastolic velocity
  • PI:Pulsatility index (of Gosling)
    • PI = (PSV–EDV)/MV
  • RI:Resistance index (of Pourcelot)
    • RI = (PSV–EDV)/PSV
  • VTI (cm):Velocity-time integral
  • TAV (cm/s):Time-averaged velocity
  • S/B:The average RI of a cycle
  • SD:Systolic/Diastolic Ratio
    • SD = PSV/EDV
  • ACCL (cm/s²):The acceleration index
    • ACCL = (V1 – V2)/ACCT
  • ACCT (s):The time from the lowest to the highest
  • VFM (ml/min):Volume flow per minute
  • VFC (ml):Volume flow per cycle
  • VFM Max (ml/min):The maximum of volume flow per minute
  • Diam (mm) :Diameter

The glossary of measure tool “PW V, T, HR”

  • T (s):Time
  • HR (bpm):Heart rate
  • Range (cm/s):The range of flow velocity

The glossary of measure tool “RI, S/D”

  • PSV (cm/s):Peak systolic velocity
  • EDV (cm/s):End diastolic velocity
  • S/D:Systolic/Diastolic Ratio
    • SD = PSV/EDV
  • RI:Resistance index (of Poucelot)
    • RI = (PSV–EDV)/PSV

The glossary of measure tool “PI”

  • PSV (cm/s):Peak systolic velocity
  • D (cm/s):End diastolic velocity
  • Area (cm²):Blood vessel cross-sectional area
  • Diam (mm):Diameter
  • PI:Pulsatility index (of Gosling)
    • PI = (PSV–EDV)/MV
  • VF (ml/min):Volume flow
  • M (cm/s):Mean velocity

The glossary of measure tool “VTI”

  • VTI (cm):Velocity-time integral