Magstim Rapid²
Operating Manual
© The Magstim Company Limited 44 MOP03-EN-03
4.4.9 External Triggering
If an external triggering device is used, the Rapid
2
uses the power set to govern the maximum
discharge frequency. Therefore, if the external frequency is set higher than the power set will allow,
the stimulator will discharge at the maximum rate the stimulator can achieve for the power set, and not
at the rate from the external trigger source. In these situations, reducing the power will allow the
discharge frequency to increase. However, during external triggering there are no duration limits on
the trains. Therefore, it is probable under high frequency operation that enough energy will be
discharged into the coil to result in its temperature rising rapidly above 40
o
C following the system
going into a coil over-temp condition and reverting to its discharged state.
It is important that if this type of operation is intended the protocol be run prior to use on a patient and
the surface temperature of the coil monitored to ensure that the patient is not exposed to excessive
temperatures.
Not: If the external trigger is set to the level triggering option it is possible for auto-triggering to occur.
Also note than when using a Rapid
2
Plus
1
with external triggering, the performance is limited to that of
the Super Rapid
2
.
IMPORTANT
The temperature of the internal components become elevated during operation. The system should
be left on, and uncovered, for approximately ten minutes following completion of stimulation to enable
the fan to cool the internal system components.
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