Rf Lesion Operation - NeuroTherm NT1100 Operator's Manual

RF Lesion operation

The NT1100 has a unique heating algorithm for multi electrode heating control
The algorithm senses the difference in the heating capacity between the different
electrodes, and will be able to deliver different amounts of power to each electrode.
This will maintain an equal temperature for each electrode.
The Advantages of the new algorithm
•
Lesions with larger exposed tips in multi electrode mode
•
Lesioning multiple sites with extremely different impedance / tissue characteristics
•
Faster ramp up to set temperature and better temperature monitoring
•
Timer will start when the temperature of all probes is close to the set temperature.
All electrodes will have the full time at lesion temperature
The generator can also be operated in the Auto Mode whereby with the RF Output Control
in the OFF position, the 'Auto Start' switch is pressed and the temperature will ramp up at
8°C per second and the time will start when the measured temperature is within 5ºC of the
desired temperature. (In Pulse or Pulse Dose Mode the Time starts when the Auto Start
button is pressed or RF power is applied to the patient.)
In both Auto and Manual mode when the time set for the procedure has elapsed, a
warning tone is heard and RF Power is Turned Off.
Similarly in the 'Lesion' Function the generator can perform profile heating to give disc
heating procedures and these are performed in the Auto Mode.
When the 'Pulse' function is selected the generator gives out pulses whose width and
frequency is selected from the original value set in the machine. Temperature and time for
the procedure are also selected from the original values set in the machine, but both of
these values can be modified using the relevant up/down buttons.
If it is required to carry out Pulsed RF at a fixed voltage or current or if a Pulse Dose
procedure is required then these have to be carried out in Auto Mode (i.e. leaving the RF
Output Control in the 'OFF' position and starting the procedure using the Auto Start
Button.)
The output of the generator is displayed on the screen with a curve showing Temperature
against Time and all relevant Temperature/Impedance/Voltage/Current/Power/Counts are
also displayed for information.
The red Auto Stop button turns off the RF Output of the generator to the patient whatever
state the machine is in and acts very much like an Emergency Stop button.
Document 109.00
NEUROTHERM RADIO FREQUENCY LESION GENERATOR
OPERATORS MANUAL
®
MODEL NT1100
10September2012 Issue 06
5-4