Optic nerve sheath diameters in four patients who were observed longitudinally comparing the values obtained when the shunts were occluded and when they were patent
| ONSD at time of shunt revision | ONSD during intervening period | |||||
|---|---|---|---|---|---|---|
| Patient | Range | Mean | SD | Range | Mean | SD |
| 1 | 5.0–8.0 mm | 6.2 mm | 1.1 | 2.5–4.0 mm | 3.3 mm | 0.9 |
| 2 | 4.4–5.6 mm | 5.0 mm | 0.3 | 2.2–4.3 mm | 3.1 mm | 0.6 |
| 3 | 4.5–6.0 mm | 5.6 mm | 0.7 | 3.5–4.4 mm | 3.9 mm | 0.4 |
| 4 | 4.3–5.7 mm | 4.8 mm | 0.6 | 2.5–4.6 mm | 3.4 mm | 0.5 |