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MEP Pod
4.3.2
1.
The MEP Pod is attached to the rear right hand side of the UI when viewed from the rear.
Remove the plastic cover to expose a 15 way D Type socket.
2.
Attach the MEP Pod cable, ensuring that the plug is properly inserted.
3.
Replace the plastic cover and ensuring that the cable is passed through the notch on the lower
edge of the cover.
Note: This cover, when replaced, provides strain relief for the connector. Do not operate the
equipment without replacing this cover, as damage to the connector and the internal electronics
of the UI is likely.
4.
Attach the EMG cable to the MEP Pod and snap the free connectors onto surface type electrodes
(for example, Kendall ARBO H124). Suitable electrodes are available from many medical supply
companies, and no recommendation is made as to a particular type. Electrodes should be chosen
which are suitable for the collection of EMG data, have snap connectors, and which are compliant
with local regulations. When connecting the electrodes, follow the colour code on the MEP Pod.
5.
The EMG connection cable should be screened and should be suitable for use when in direct
contact with the skin. No latex should be present in the cable.
6.
The electrodes should be positioned on the target muscle which is controlled by the neurons
being stimulated. For example, if the area of the motor cortex which controls the hand is to be
stimulated, the surface electrodes should be placed on abductor digiti minimi, about 1cm apart.
The ground electrode should be placed on the wrist. Care should be exercised when placing
surface electrodes. It is important that a consistent approach is observed, as the amplitude of the
EMG signal is dependent on the position of the electrodes. Good practice in relation to skin
cleaning should be observed.
Caution: For safety reasons, do not leave patient cables attached to the MEP Pod if they are not
being used. If an unused cable is left connected, and the patient is connected to the other
channel, there is the possibility that the unused cable may touch an earthed surface which could
allow current to flow through the patient to ground.
Caution: Do not allow the coil or the coil cable to come into close proximity with the MEP Pod
patient cables. During discharge, current may be induced in these cables.
Printer
4.3.3
1.
The printer should be placed on a flat surface 1.5 meters away from the patient.
2.
Insert the cable connector straight into the Printers Serial Port to power the printer via the Mains
3.
Connect the other end of the cable to the back of the UI via an optical RS/232 Interface cable by
sliding the connector into the slot until tight. Connect the printer to its power supply and the power
supply to the mains.
© The Magstim Company Limited
Figure 4.7: Connection of the MEP Pod
23
Magstim Rapid²
Operating Manual
MOP03-EN-03
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