Design features of the NVM5 6-mm dilator that render it suitable for FESS.
| Design Feature | Intraoperative Applicability |
| Cannulated design | Easily passes over the guide wire. |
| 6-mm diameter | Snug fit with the endoscopic cannula, which is introduced without pinching tissue. |
| Carbon material isolating the electrode tip (white triangle) | “Real-time directionality”; receives signals only where electrode points. Carbon is brittle and needs to be swapped out for a metal dilator if malleting is required. |