[Therapy of normal pressure hydrocephalus with the transcutaneously magnetically adjustable shunt]

36 patients with a normal pressure hydrocephalus were treated with a ventriculo-peritoneal shunt system. We compared the results of conventional system and the sophy magnetic system. 8 of 15 patients with a Holter-Hausner or Sigma-Orbis valve were reoperated because of insufficiency. All of 21 patients with a sophy system were successfully treated.