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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.

 

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.

 

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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