294 – Trans-radial Electrical Bioimpedance Velocimetry (TREV and TRUEV)

Blood Flow Measurements using the NICO100D

This application note discusses Trans-Radial-Ulnar Electrical bioimpedance Velocimetry (TRUEV); measurements and analysis; the configuration discussed interrogates both the radial and ulnar (TREV >> TRUEV) arteries.

bioimpedance analysis

Sample Data | TREV  Cold Pressor Test

The following topics are addressed:

  • Trans-radial Electrical Bioimpedance Velocimetry (TREV)
  • TREV Measurement
  • Measurement Methods: Ergonomics, Electrodes, Amplifier, Data Acquisition, Software
  • Bioimpedance Equivalents of Hemodynamic Variables for Circulatory System
  • Bioimpedance Model
  • Hemodynamic Experiments
  • Grip Anticipation Test
  • TREV – ECG – PPG Timing Measures
  • Recording during Breath Holding: ECG, HR, PPG, Z(t), ACC, CON, ACI
  • TREV in the fMRI
  • Tilt Table Test
  • Selected References

The following BIOPAC hardware is mentioned in this application note:

  • MP160 Data Acquisition System with AcqKnowledge
  • IPS100D Isolated Power Supply
  • AMI100D Amplifier Module Interface
    • older systems use HLT100C High-level Transducer Interface
  • ECG100D Electrocardiogram Smart Amplifier
  • EL526 Strip Electrodes
  • NICO100C-MRI Noninvasive Cardiac Output Amplifier for MRI
  • NICO100D Noninvasive Cardiac Output Amplifier
  • PPG100C Photoplethysmogram Amplifier

TREV Webinar | Bioimpedance and Cardiac Output—a User-friendly, Noninvasive Technique

Associated Files

Associated Applications

  • ICG: Impedance Cardiography/Cardiac Output - Record cardiac output, thoracic impedance changes, or any kind of bioimpedance signal. Use AcqKnowledge for a fully automated ICG analysis and dZ/dt waveform classifier.
  • Cardiovascular Hemodynamics - Hardware for human and animals. Measure continuous BP, ECG, stroke volume, cardiac output, PPG, etc. For animal and tissue look at acute and chronic dose-response.
  • ECG: Cardiology - Connect up to 16 ECG input leads with MP160 system. Use automated analysis features for HRV, RSA, to classify heartbeats, identify arrhythmias, and perform ECG averaging.
  • Plethysmography - Record PPG, measure BP indirectly, look at appendage size variations, and perform sexual arousal studies using BIOPAC or 3rd-party transducers.


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