Use appropriate duplex instrumentation with appropriate frequencies for the vessels being examined.

• Typically, a curvilinear array transducer 2-5 MHz
• A 1-5 MHz for deeper imaging.
• A linear 3-7 MHz for superficial veins.
• Display of two-dimensional structure and motion in real-time
  • Doppler ultrasonic signal documentation
  • Spectral analysis with color and/or power Doppler imaging
• Digital storage capabilities of ultrasound image