Samsung SA8000 SE Manual do Utilizador descarregar pdf (Página 13)

Chapter 5.Measurements and Calculations 5 - 13

3. Using the Trackball, put the cursor on the two points to measure speed. Press the

Set button to fix the points.

4. Pressing the Change button before Set button allows the position of the

measurement area to be reset. At that time, the names of Point A and Point B can be

changed.

5. After the position setup, the speed at each point and the speed ratio between the two

points are displayed on the screen.

6. A new cursor appears for a new measurement.

▐ Doppler Trace: average speed measurement using trace

The time duration value (dT: sec), integration value of blood flow speed (VTI: cm or mm),

maximum speed (Peak V: cm/s or mm/s), average speed (Average V: cm/s or mm/s)

along with Average G (mmHg) will be displayed.

A maximum of four sets of measurements can be simultaneously displayed. The following

shows the measurement formulas and methods.

TTdT

−

):(, IntegralTimeVelocityVTIdtvVTI

∫

×=

flowofDuration

VTI

VMean =

1. Press the Caliper button, and the currently selected measurement item appears on

the left side of the screen.

2. Select ‘Doppler Trace’ by pressing Flexible Soft button [1] Distance or by pressing

Change or Caliper button several times.

3. Move the cursor with the Trackball to the start point of the area to measure speed.

Press the Set button to fix the point. Using the Trackball, draw the contour of the

area to measure speed, and press Set button.

4. The part of the trace line can be erased by rotating the Trackball to the left before

pressing Set button.

5. After position setup, the measurement results are displayed on the screen.

6. A new cursor appears for a new measurement.

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Samsung SA8000 SE Manual do Utilizador Página 13