Table 2.
Summary of the optic nerve sheath diameter ultrasound reference range values established in studies on healthy people.
| Study | N° healthy volunteers | ONSD reference range values (mm) | ||
|---|---|---|---|---|
| Mean ± SD | Min | Max | ||
| Garcia et al. (20) | 23 | 4.80 ± 0.60 | 3.90 | 5.90 |
| Bäuerle et al. (21) | 40 | 5.40 ± 0.60 | 4.30 | 7.60 |
| Kane et al. (22) | 50 | 4.34 ± 0.40 | Not reported | Not reported |
| Ballantyne et al. (23) | 102 | 3.08 ± 0.36 | 2.10 | 4.30 |
| Maude et al. (24) | 136 | 4.41 (no SD reported) | 4.24 | 4.83 |
| Chen et al. (25) | 519 | 5.10 ± 0.50 | 3.50 | 6.40 |
| Wang et al. (26) | 230 | 3.46 ± 0.28 | 2.65 | 4.30 |
| Kim et al. (27) | 585 | 4.11 ± 0.35 | 3.30 | 5.20 |
| Goeres et al. (28) | 120 | 3.68 ± 0.39 | 2.80 | 4.50 |
| Avci et al. (29) | 195 | 4.16 ± 0.69 | 2.20 | 6.20 |
| Chandrapatham et al. (30) | 122 | 4.20 (no SD reported) | 3.60 | 4.90 |
ONSD, optic nerve sheath diameter; SD, standard deviation.