[The present state and view of the cerebrospinal fluid hypovolemia research].

Spontaneous intracranial hypotension is a rare disease characterized by orthostatic headache, low cerebrospinal fluid pressure and diffuse dural enhancement in brain MRI. German neurologist Schaltenbrand reported that orthostatic headache by low cerebrospinal fluid pressure in 1938. This disease came to be known after development of radiological diagnosis in 1990'. The author reported that cerebrospinal fluid leak is induced in the whiplash sequelae after traffic accident in 2003. Cerebrospinal fluid hypovolemia got into the news social. A lot of doctors deny the cerebrospinal fluid leak after mild traffic accident. The Cerebrospinal Fluid Hypovolemia Society is started up in 2003 and 11 research meeting held until today. The research group of Ministry of Health, Labour and Welfare was made in 2007. The image diagnostic criteria of cerebrospinal fluid leakage syndrome model were made in 2012. Neither the mechanism of the cerebrospinal fluid leak nor the mechanism of symptoms are understood well. The pathophysiology of cerebrospinal fluid hypovolemia is expected by researching the cerebrospinal fluid circulation.