Table 1.
Baseline characteristics of patients used in this study (n = 62).
Fig 1.
(A): ONSD in groups without IICP and with IICP. The bar represents the median value and the 25th to 75th percentiles. ONSD in patients with IICP (5.80 mm, range 4.3–6.7 mm) is significantly higher than that in those without IICP (5.3 mm, range 4.0–6.2 mm) (P < 0.001). (B): The area under the receiver operator characteristic curve is 0.936. ONSD > 5.6 mm yielded a sensitivity of 93.75% (95% CI: 79.2%–99.2%) and a specificity of 86.67% (95% CI: 69.3%–96.2%).
Fig 2.
Scatterplot relating optic nerve sheath diameter (ONSD) and intracranial pressure (ICP) according to the presence of increased intracranial pressure (IICP).
The linear prediction from regression is shown as solid or dotted line.
Fig 3.
(A, B): A 65-year-old man presented with sudden-onset altered mentality caused by acute IVH and hydrocephalus. US ONSD was measured as 5.7 mm and an EVD was placed in the right lateral ventricle with an opening pressure of 22 mmHg. (C, D): Three hours later, the patient’s ICP surged to 40 mmHg with an ONSD of 6.4 mm due to rebleeding of the right PICA aneurysm. Emergency coil embolization of the right PICA aneurysm was performed and another EVD was inserted in the left lateral ventricle. (E, F): Brain CT scans taken 3 weeks after the operation showed a substantial improvement of hydrocephalus and IVH with an ICP of 10 mmHg and an ONSD of 5.4 mm.