Table 1.
Technical aspects of the POLARx compared to the AFA system.
| Characteristics | POLARx | AFA |
|---|---|---|
| Sheath diameter (F) | 12.7 | 12 |
| Sheath outer diameter (F) | 15.9 | 15 |
| Radiopaque marker proximal to the tip (mm) | 2.5 | 5 |
| Balloon size (mm) | 28 | 28 |
| Balloon shaft diameter (F) | 10.5 | |
| Balloon tip length (mm) | 5 or 12 | 8 |
| N2O injection | 8-hole coil | 8-hole coil |
| N2O fluid flow during freeze (sccm) | 7800 | 7200 |
| Pressure during freeze (psi) | <525 constant | 530–600 |
| Location of injection coil from pole of balloon (mm) | 2.5 | 3.5 |
| Location of TC from coil (mm) | 18 | 15 |
| Location of gas outflow proximal of TC (mm) | 5 | 10 |
| Phrenic nerve palsy control | DMS (integrated/quantitative) | CMAP (not integrated/not quantitative) |
| Console register procedural data | yes | no |
| Console operation autonomically | yes | no |
CMAP, compound motor action; DMS, diaphragm movement sensor; TC, thermocouple.