BK Medical bkSpecto, Advanced User'S Manual

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86 Chapter 8 August 2018 bkSpecto Advanced User Guide (16-01642-01)
Table 8-1. Two types of Doppler curves.
Fig 8-3 depicts a Doppler spectrum with two cycles. A cycle starts at the start systole
(when the heart starts to contract) and ends at the end diastole (when the heart is
resting and filled with blood). The correct placement of vascular calculation markers
is indicated in the figure; their abbreviations are as follows:
Figure 8-3. Doppler spectrum including vascular calculation markers.
The calculations and the way in which they are presented on the monitor depend on
whether the Doppler angle is active or not.
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.
WARNING M-w2
Drawings of Doppler curves, manual and automatic, are meant as tools for positioning
cursors so that measurements based on the curves can be calculated automatically. The
system has no facilities for checking whether the automatic measurements are
reasonable. Curves drawn on very noisy spectra may lead to misplacement of
measurement cursors. Make sure that measurement cursors are positioned so that the
results are reasonable. If they are not, you must adjust the position of the cursors manually.
SS Start systole MD Minimum diastole
PS Peak systole ED End diastole
ES End systole
Peak (Max)
Mean
time
Doppler Shift
kHz