User's Manual

Acclarix LX9 Series Diagnostic Ultrasound System User Manual Measurements and Reports
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3. Move the caliper to the start point.
4. Press the <Set> key to fix the start point and start drawing the trace.
5. Moving the caliper to mark the trace outline.
Presses of the <Update> key will toggle between active calipers, allowing you to adjust the
positions of the PS or ED points in the trace.
6. Press the<Set> key to complete the trace..
8.1.3.6. PG(Pressure Gradient)
PGmax and PGmean can be measured in Cardiac exams. The measurement method is manual trace.
Please refer to the steps of manual trace method in section 8.1.3.2 trace measurement for details.
8.1.3.7. Tei Index
The Tei index measurement is useful for the assessment of ventricular systolic and diastolic function.
Higher Tei index indicates decreased ventricular function.
To use the TEI measurement:
1. In Cardiac exams, invoke the generic measurement function on a Doppler strip.
2. Select Tei Index.
3. Measure COT (Mitral Valve Close-Open Duration ) by caliper pairs.
4. Measure ET (Ventricular Ejection Time) by caliper pairs.
5. The system calculates the Tei index automatically. The illustration is shown below: