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| Effect | Tract, mm | Tract including burning effect, mm | |
| Conventional ED | 1 | 1.57 | 2.54 |
| Novel ED | 0.80 | 1.60 | |
| Conventional ED | 2 | 1.68 | 2.66 |
| Novel ED | 1.14 | 1.76 | |
| Conventional ED | 3 | 1.78 | 2.71 |
| Novel ED | 1.26 | 1.98 | |
| Conventional ED | 4 | 1.81 | 2.98 |
| Novel ED | 1.37 | 1.95 |
ED, electrocautery dilator.
