Common pterygopalatine fossa (PPF) measures related to the nasal approach
| Common PPF measures | |
| Distance from the nasal mucosa to SPG | 6.77 mm (range 4.0–11.6 mm) |
| PPF height | 24.1 mm ±3.5* |
| PPF volume | 0.93 mL ±0.18* |
| Sphenopalatine foramen diameter | 5 mm ±0.9* |
| SPG size | 3–5 mm |
*Data expressed as mean±SD.
SPG, sphenopalatine ganglion.