FSI simulation of CSF hydrodynamic changes in a large population of non-communicating hydrocephalus patients during treatment process with regard to their clinical symptoms - Fig 5

<p>(a) Compares pressure diagrams in the aqueduct of Sylvius and behind the optic nerve sheath of NCH patient No.1 before shunting and normal subject No.2. There is 9.5° phase lag between occurrence time of minimum pressure in the patient and the normal subject. It is worth mentioning that the NCH patient No.1 before shunting and normal subject No. 2 have the highest CSF pressures. (b) Shows normalized flow rate and pressure gradient diagrams in the aqueduct of Sylvius of patient No.1. The phase lag of flow rate and pressure gradient diagrams in the aqueduct of Sylvius of the NCH patient No.1 before shunting is 59.5°. AS: aqueduct of Sylvius; BONS: behind optic nerve sheath; CSF: cerebrospinal fluid; NCH: non-communicating hydrocephalus; NS: normal subject.