Infant weight and suggested insertion length of an appropriate NPA
| Body Weight (Kg) | Nosetip–Earlobe distance (cm) | Nares-Vocal cord distance (cm) | Approximate insertion length (cm) |
|---|---|---|---|
| <3 | 7.6 +/− 1.3 | 7.6 +/− 0.8 | 7.0 |
| 3–6 | 8.8 +/− 1.0 | 8.8 +/− 0.7 | 8.0 |
| 6–9 | 10.0 +/− 0.8 | 9.6 +/− 0.6 | 9.0 |
| 9–12 | 10.1 +/− 0.9 | 10.2 +/− 0.5 | 9.5 |