Household magnets can change the programmable shunt valve in hydrocephalus patients

Document Type

Conference Proceeding

Publication Date

1-1-2005

Abstract

We found that external household magnets can change the pressure settings of programmable shunt valves. We compare two popular, adjustable, shunt valves used to regulate the cerebral-spinal fluid (CSF) of hydrocephalus patients: the Codman®Hakim™ Programmable Valve (CHPV), and the PS Medical®STRATA™ Valve. We measured the threshold magnetic fields required to change the settings of these two valves at different initial settings. Both types were susceptible to setting changes, with the actual threshold magnetic field strength needed depending on the valve setting and also having some valve variability. The magnetic fields required to increase the valve settings were similar for the two valves, but the fields required for reducing the settings were lower for the STRATA valve than for the CHPV. ©2005 IEEE.

Identifier

28444453263 (Scopus)

Publication Title

Proceedings of the IEEE Annual Northeast Bioengineering Conference Nebec

ISSN

1071121X

First Page

22

Last Page

23

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