gms | German Medical Science

56. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie e. V. (DGNC)
3èmes journées françaises de Neurochirurgie (SFNC)

Deutsche Gesellschaft für Neurochirurgie e. V.
Société Française de Neurochirurgie

07. bis 11.05.2005, Strasbourg

HAKIM programmable valve – reasons for failure to program

Programmierbare Hakim-Ventile – warum lassen sich manche nicht verstellen?

Meeting Abstract

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  • corresponding author U. M. Mauer - Bundeswehrkrankenhaus Ulm, Abteilung Neurochirurgie, Ulm
  • U. Kunz - Bundeswehrkrankenhaus Ulm, Abteilung Neurochirurgie, Ulm

Deutsche Gesellschaft für Neurochirurgie. Société Française de Neurochirurgie. 56. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie e.V. (DGNC), 3èmes journées françaises de Neurochirurgie (SFNC). Strasbourg, 07.-11.05.2005. Düsseldorf, Köln: German Medical Science; 2005. DocP140

The electronic version of this article is the complete one and can be found online at:

Published: May 4, 2005

© 2005 Mauer et al.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( You are free: to Share – to copy, distribute and transmit the work, provided the original author and source are credited.




Sometimes it is useful to change the pressure of a valve in patients with hydrocephalus even months after implantation. Reasons may be an other mobility or a different pressure situation in the peritoneal cavity. But sometimes it was not possible to change the pressure in the programmable valves.


From 2000 to 2004 we implanted 262 Hakim programmable valves. In these years we had the situation 6 times that programming after implantation failed after normal repeated programming. We evaluate these cases.


Three of them were programmed after the transmitter was placed upside down. The three remaining valves could not be programmed by any method, even with a MRI-sequence. These were explanted because of these problems. Scanning electron microscopy was used to visualize the structures of the valves. All explanted valves had extensive deposits. Of the three patients whose valves were explanted, all three had reasons for increased protein in the CSF: an extreme premature infant with intraventricular haematoma, an old man with dialysis and consecutive amyloidosis and a young woman after subarachnoid hemorrhage.


The situation that programming of a HAKIM programmable valve fails is rare. In some cases the valve could be repaired by some tricks while the remaining valves were explanted for other problems. All patients with explanted valves had a reason for an increased protein level in the CSF.