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Continuous wave doppler

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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  • transducer transmits a continuous ultrasound stream in a single direction and simultaneously receives the echoes continuously.
  • records very high velocities of flow.
  • it cannot be range-gated - thus it superimposes on the display all signals caused by any reversed or forward flow patterns occurring over the scanned region.
  • drop in pressure across a stenosed valve is proportional to the increase in velocity across it (this is calculated using the modified Bernoulli equation: pressure drop = 4 v^2).

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