B-K Medical Pro Focus 2202, User Manual

Page: 215 / 356

General Pro Package 215
Table 15-3. Doppler mode measurements in the General Pro Package.
Doppler Spectra
Most vascular calculations involve making measurements on a Doppler (FFT)
spectrum.
You can fit a curve to the spectrum either automatically or manually and then make
measurements on the curve. Two curve types are generally used:
Table 15-4. Two types of Doppler curves.
A/B (Systolic velocity)/
(Diastolic velocity) PS/ED (Measure PS, then ED)
B/A (Diastolic velocity)/
(Systolic velocity) ED/PS (Measure PS, then ED)
PS/ED (Peak Systolic Velocity)/
(End Diastolic Velocity) PS/ED (Measure PS, then ED)
Stenosis
ST Dist 1 Transverse diameter of the
vessel lumen before the
stenosis. Distance
ST Dist 2 Transverse diameter of the
lumen at the stenotic part of
the vessel.When you
measure this after measuring
ST Dist 1, % stenosis is
calculated (formula on
page 259). Distance
ST Area 1 Area of vessel lumen before
the stenosis. Used to
calculate % stenosis. Ellipse or freehand.
ST Area 2 Area of residual lumen of
vessel used to calculate
stenosis. When you measure
this after measuring ST Area
1, % stenosis is calculated
(formula on page 259). Ellipse or freehand
Measurement Results Measuring Tool
This type of curve is a trace of...
Peak (Max) maximum points of the spectrum (those farthest from the
baseline)
Mean mean points of the spectrum