Mindray DC-8 EXP User Manual

3-12 General Measurement
NOTE: When doing D trace, please set systolic starting time as the starting point and diastolic
ending time as end point. That is, by tracing the Doppler spectrum from systolic to
diastolic to calculate indices.
 Operations:
1. Click [D Trace] in the measurement menu, and the cursor appears on the screen.
2. Move the cursor to the starting point to be measured and press the [Set] key to fix the point.
3. Move the cursor around the object.
Move the cursor right: draw a trace line overlapping the spectrum as much as possible.
Move the cursor left (or rotate the <Angle> anticlockwise to correct the trace line already
drawn.
4. Trace the end point to be measured and press <Set> to fix the point.
Result parameters
Results obtained from D trace are:
Parameters Descriptions
PS Peak Systolic Velocity
The highest velocity of the red blood cells crossing the
sample volume.
ED End-Diastolic Velocity
Measures the blood velocity at the end of the cardiac
cycle.
MD Min-Diastolic Velocity Minimum absolute Velocity in diastolic cycle.
Vel / Flow velocity
Average
velocity
/
The average flow velocity in the whole traced Doppler
spectrum.
 TAMAX (Time Averaged Maximum Velocity):
()
ab
Tb
Ta
TTdttVscm −
∫
)(＝)/TAMAX(
Where V(t) is the maximum velocity
 TAMEAN (Time Averaged Mean Velocity): Obtained
by auto spectrum calculation.
()
ab
Tb
Ta
TTdttVscm −
∫
)(＝)/TAMEAN(
Where V(t) is the mean velocity.
PPG Peak Pressure Gradient
It is the corresponding pressure gradient of the peak
systolic velocity. PPG (mmHg) = 4 × PS (m/s)
2

Mindray DC-8 EXP Specifications

General

Brand	Mindray
Model	DC-8 EXP
Category	Medical Equipment
Language	English