Idmed Algiscan, User Manual

Page: 24 / 40

User Manual AlgiScan 24
Symbols representing the connection status of the electrodes to the AlgiScan patient:
Green electrode symbol:
Correct conduction, optimal
stimulation.
Yellow electrode symbol:
Insufficient conduction,
stimulation may not
correspond the expected
value.
Red electrode symbol:
Conduction problem,
short-circuit (electrode cable
damaged, not connected, or
electrodes not connected to
patient) or poor
electrode-patient contact.
Grey electrode symbol:
Conduction problem,
short-circuit (damaged
electrode cable,...), the
electrodes are in direct
contact.
It should be noted that if the electrodes are in contact with each other or if the cable is
damaged causing a short circuit, the AlgiScan displays an electrode symbol in grey with a red
line symbolising an inter-electrode connection.
Insufficient cleaning of the skin may cause excessive skin resistance; hence we
strongly advise placing the electrodes on clean skin free of injury. It should be noted that a
high skin resistance does not necessarily cause problems in obtaining electric stimulation.
Display of the results
The AlgiScan displays the results of the measurement of the eye that has been
filmed. The results and measurements displayed depend on the protocol used. It is important
to control the quality of the displayed curve and to verify that measurement values are not
artefacts. Thus the blue and black horizontal lines indicate respectively the baseline value of
the pupil (pupil size before stimulation) and the minimum pupil size during measurement
(maximum pupil change). The lines must be appended to the curve and not to an isolated
point (artefact).
After each measurements, results can be saved or deleted. These measurements
will be recorded in the current folder.
Press the ‘Save’ icon to validate and keep the results
Press the ‘Delete’ icon to delete the results
Note: If a data transfer mode is active, the following icon is displayed on the screen.
It allows to save and send the data to the configured receiver module.
Results in the “Light flash” stimulation mode
In this mode, the results displayed are:
• Results control curve with the following markers:
o Duration of the flash (light blue area)
o Baseline diameter of the pupil (blue horizontal line)
o Maximum variation in pupil size (black horizontal line)
• Diameter baseline before stimulation (Base in mm)
• Variation percentage (Var. in %):
(Var%=(Abs(Variation(mm))/Base(mm))*100)
• Maximal size variation of the pupil (value in mm in brackets)
• Constriction Velocity (speed in mm/s)
• Latency of constriction (latency in ms)
• A commentary on reactivity level
• Selected eye for the measurement