SECTION
6
Force 2 User’s Guide 6-1
6The REM Contact Quality
Monitoring System
This section describes the REM Contact Quality Monitoring System.
The REM Contact Quality Monitoring System ensures adequate patient
contact area by measuring the resistance between the two sections of the
REM patient return electrode through the patient. Both sections of the pad
and both connector pins carry the RF currents back to the generator. The
pin to pin resistance measurement is performed continuously, even when
the generator is activated. The measurement uses small currents at
140 kHz and will not produce nerve stimulation or interfere with ECG
monitors. The alarm levels have acceptance ranges so that small changes
in resistance will not cause intermittent alarms.
The REM contact quality monitor is activated when a REM patient return
electrode connector is inserted in the Patient receptacle.
The REM contact quality monitor alarms and disables the monopolar
output under the following conditions:
• The patient return electrode is not plugged into the generator.
• A patient return electrode cord is broken.
• The patient return electrode is not in contact with patient.
• There is a reduction of patient return electrode contact area due to
movement, loss of adhesion, or drying of contact gel.
• There is excessive impedance in the patient return electrode cord.
If a conventional, single-section patient return electrode is used, the REM
system monitors the pin to pin resistance at the connector and is capable
of detecting broken wires or connectors in the patient return electrode
cord.
The REM contact quality monitor is not able to monitor the patient
contact area if conventional, single-section patient return electrodes are
used.
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