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.