natus XLTEK Protektor32 User Manual

XLTEK Protektor32 Instructions for Use
31
Current Density
When using TcMEP mode you must be aware of the Current density. Current density is dependent on
the stimulation strength (voltage) and number of pulses. In order to achieve current densities less than 2
mA rms / cm
2
you can use the parameter settings-setup appearing in Table 4.
Table 4: Maximum voltage - number of pulses combinations to achieve less than 2 mA rms/cm
2
.
Maximum voltage
settings per pulse setting per electrode configuration to avoid current densities above
2mA
RMS
/cm
2
Pulses per second
1
2
3
4
5
6
7
8
9
One EEG disc electrode (0.9cm
2
)
Voltage Settings [V]
255
180
147
127
114
104
96
90
85
DISPOSABLE SILVER EEG DISC ELECTRODES - Diameter of cup: 10 mm; Height of cup: 3 mm;
Surface area = 90 mm
2
(Part #105191 in the Natus Neurodiagnostic Accessories Catalogue)
If you use settings-setups combinations exciding those detailed in Table 4 above, stimulation
may result in skin burns and will require special attention of the operator.
t = Pulse Duration – Fixed at 50us
i = Interpulse Interval (pulse rate)
Note: Num Priming Pulses + Num Test Pulses cannot exceed 9 total.
1
2
num priming
pulses
... ...
num test
pulses
1
2
t
i
Priming Gap
Priming Pulses Test Pulses
i

natus XLTEK Protektor32 Specifications

General

Brand	natus
Model	XLTEK Protektor32
Category	Medical Equipment
Language	English