Schmitt J, Spring A
Neurochirurgische Klinik des Leopoldina Krankenhauses Schweinfurt.
Neurochirurgia (Stuttg). 1990 Oct;33 Suppl 1:23-6. doi: 10.1055/s-2008-1053591.
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.