1.Placing position of electrode needle
Inserting position of umbrella electrode：
When the first point of the ablation of the umbrella electrode is ended, the needle shall move back 1cm to ablate the second point until the entire tumor is completely ablated.
2.Clinical
Operation Guidelines: The parameter setting (power control) of generator
for tumor RF ablation
Electrode with expanded array diameter of 2cm:
1) Long time, simple operation
|
Type |
Control Mode |
Expected ablation size |
Initial power |
Operation |
Maximal power |
|
Diameter of 2cm |
Power control |
Ellipsoidal, with major axis of 2.0cm-2.5cm |
30W |
Adjust power between initial power and maximal power during operation according to temperature feedback and keep it between 90-110℃ at best. Ablation time should be no less than 5 min. |
80W |
|
1 Power can be adjusted flexibly during operation. Generally, you can adjust it to a higher power if temperature increases slowly, vise versa. 2 Ablation size is proportional to power multiplied by ablation time. |
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2)Short time, slightly complex operation
|
Type of electrode |
Control mode |
Expected ablation range |
Setting power |
Operation in the treatment |
|
diameter of 2cm |
Power control |
Ellipsoidal, with major axis of 2.0cm-2.3cm |
70W or 80W |
When the ablation is completed, and the machine cuts off automatically RF output, the RF sub needle shall be taken back, and open again after rotated a certain angle in situ, and carry out ablation again. |
Electrode with expanded array
diameter of 3cm:
1) Long time, simple operation
|
Type |
Control Mode |
Expected ablation size |
Initial power |
Operation |
Maximal power |
|
Diameter of 3cm |
Power control |
Ellipsoidal, with major axis of 3.0cm-3.7cm |
50W |
Adjust power between initial power and maximal power during operation according to temperature feedback and keep it between 90-110℃ at best. Ablation time should be no less than 8 min. |
110W |
|
1 Power can be adjusted flexibly during operation. Generally, you can adjust it to a higher power if temperature increases slowly, vise versa. 2 Ablation size is proportional to power multiplied by ablation time. |
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2)Short time, slightly complex operation
|
Type of electrode |
Control mode |
Expected ablation range |
Setting power |
Operation in the treatment |
|
diameter of 3cm |
Powercontrol |
Ellipsoidal, with major axis of 3.0cm-3.3cm |
100W or 110W |
When the ablation is completed, and the machine cuts off automatically RF output, the RF sub needle shall be taken back, and open again after rotated a certain angle in situ, and carry out ablation again. |
Electrode with expanded array
diameter of 4cm:
1) Long time, simple operation
|
Type |
Control Mode |
Expected ablation size |
Initial power |
Operation |
Maximal power |
|
Diameter of 4cm |
Power control |
Ellipsoidal, with major axis of 4.0cm-4.7cm |
60W |
Adjust power between initial power and maximal power during operation according to temperature feedback and keep it between 90-110℃ at best. Ablation time should be no less than 10 min. |
130W |
|
1 Power can be adjusted flexibly during operation. Generally, you can adjust it to a higher power if temperature increases slowly, vise versa. 2 Ablation size is proportional to power multiplied by ablation time. |
|||||
2)Short time, slightly complex operation
|
Type of electrode |
Control mode |
Expected ablation range |
Setting power |
Operation in the treatment |
|
diameter of 4cm |
Power control |
Ellipsoidal, with major axis of 4.0cm-4.5cm |
120W or 130W |
When the ablation is completed, and the machine cuts off automatically RF output, the RF sub needle shall be taken back, and open again after rotated a certain angle in situ, and carry out ablation again. |
Electrode with expanded array
diameter of 5cm:
1) Long time, simple operation
|
Type |
Control Mode |
Expected ablation size |
Initial power |
Operation |
Maximal power |
|
Diameter of 5cm |
Power control |
Ellipsoidal, with major axis of 5.0cm-6.0cm |
70W |
Adjust power between initial power and maximal power during operation according to temperature feedback and keep it between 90-110℃ at best. Ablation time should be no less than 15 min. |
150W |
|
1 Power can be adjusted flexibly during operation. Generally, you can adjust it to a higher power if temperature increases slowly, vise versa. 2 Ablation size is proportional to power multiplied by ablation time. |
|||||
2) Short time, slightly complex operation
|
Type of electrode |
Control mode |
Expected ablation range |
Setting power |
Operation in the treatment |
|
diameter of 5cm |
Power control |
Ellipsoidal, with major axis of 5.0cm-5.5cm |
140W or 150W |
When the ablation is completed, and the machine cuts off automatically RF output, the RF sub needle shall be taken back, and open again after rotated a certain angle in situ, and carry out ablation again. |
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