Ventriculoperitoneal shunt in treating of idiopathic normal pressure hydrocephalus-single-center study.

We proved statistical significant optimal cut-off for the best improvement of the symptoms as 9.5 months of the symptom duration. This study also confirmed successful treatment of iNPH with VP shunting using low pressure setting of gravitational valve with overall improvement in 75% and low over drainage complications in 5% We proved statistically significant increase in MMSE, decrease in 10 m walk test and number of steps test, p < 0.0001.