Table 2. Differences between separable cluster electrodes and other electrodes.

	Separable cluster electrode	Conventional cluster electrode	Single, internally-cooled electrode
The number of active tips	3	3	1
Inter-tine distance	Adjustable (separated state) or fixed (incorporate state)	Fixed	Adjustable
The number of electrodes required for a large tumor	1 to 2	1 (less effective)	3 or more
Multiple overlapping technique	Available	Available (limited for small tumors)	Available
Occupancy of the intercostal space	Small	Large	Small