5.8
Analyze Caloric Test Results (Pod and Butterfly Views)
When analyzing caloric test results, the system calculates the caloric unilateral weakness and gain asymmetry. The results
are shown in “Pods” and “Butterfly” views.
A. Click the
Review
tab and select a Caloric test.
B. Click
F12 Analysis
.
C. Click
F4 PODS - Butterfly
to display the Pods and Butterfly views.
Caloric Test Results, Pods and Butterfly Views
Pods view
– displays a plot of indi-
vidual beats (SPV (degrees/second) /
time (seconds)). Caloric weakness and
gain asymmetry data display in the
Information Area. Gain asymmetry is
shown if the option is selected in the
Operator Settings/Test Battery tab.
Butterfly view
– two intersecting lines
represent cool and warm stimulations.
–
Vertical axis = slow phase velo-
city
–
Horizontal axis = percent of cal-
oric weakness
The lines are connections between the
values of the peak responses from right
ear caloric stimulations plotted on the
left edge and the left ear responses plot-
ted on the right edge. A normal
response is an intersection point within
the “normal” box (A).
D. Adjust the baseline in the Pods view, if needed.
Caloric test results, Pods View
1. Press
F5 Move Baseline
Up
and
F6 Move Baseline
Down
to move the
baseline on the tracing.
2. Press
F7 Set Baseline Shift
to set a new baseline.
Otometrics - ICS Chartr 200 VNG/ENG
39
5 Review and Analyze Collected Data
