Pulsed-Wave (PW) Doppler Mode is used for the hemodynamic assessment of blood flow through the arteries and veins
Pulsed-Wave (PW) Doppler Mode is used primarily for the hemodynamic assessment of blood flow through the arteries and veins; it provides quantifiable information about the direction and velocity of blood through the specified vessel.
PW Doppler can measure both direction and velocity of blood flow; abnormal flow is represented by an increase or decrease in velocity, a change in direction or flow, or the presence of turbulent flow. PW Doppler also provides information on the relationship between velocities in a cycle. For example, the ratio of systolic peak velocity to end-diastolic velocity in the renal artery relates to the health of the kidney vasculature in diabetic conditions.
The sample volume size may be set at levels sensitive enough to discriminate flow from individual arteries and veins. Flow can be measured in the range of mm/s up to several m/s.
This option is available for both the Vevo 2100 and Vevo 770 Imaging Systems.
Pulsed-Wave Doppler Mode on Pulmonary Valve, showing velocity spectrum over time. The software analysis package allows for various measurements to be preformed, here a velocity time interval (VTI) was traced on the spectrum.
