Household magnets can change the programmable shunt valve in hydrocephalus patients

Sheng Liu; Richard Greene; Gordon A. Thomas; Joseph R. Madsen

Household magnets can change the programmable shunt valve in hydrocephalus patients

Sheng Liu, Richard Greene, Gordon A. Thomas, Joseph R. Madsen

Physics

Research output: Contribution to journal › Conference article › peer-review

1 Scopus citations

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.

Original language	English (US)
Article number	1.3.3
Pages (from-to)	22-23
Number of pages	2
Journal	Proceedings of the IEEE Annual Northeast Bioengineering Conference, NEBEC
State	Published - 2005
Event	Proceedings of the 2005 IEEE 31st Annual Northeast Bioengineering Conference - Hoboken, NJ, United States Duration: Apr 2 2005 → Apr 3 2005

All Science Journal Classification (ASJC) codes

General Chemical Engineering

Keywords

Hydrocephalus
Magnetic field
Pressure setting
Programmable shunt vale

Cite this

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title = "Household magnets can change the programmable shunt valve in hydrocephalus patients",

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{\textregistered}Hakim{\texttrademark} Programmable Valve (CHPV), and the PS Medical{\textregistered}STRATA{\texttrademark} 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.",

keywords = "Hydrocephalus, Magnetic field, Pressure setting, Programmable shunt vale",

author = "Sheng Liu and Richard Greene and Thomas, {Gordon A.} and Madsen, {Joseph R.}",

year = "2005",

language = "English (US)",

pages = "22--23",

journal = "Proceedings of the IEEE Annual Northeast Bioengineering Conference, NEBEC",

issn = "1071-121X",

note = "Proceedings of the 2005 IEEE 31st Annual Northeast Bioengineering Conference ; Conference date: 02-04-2005 Through 03-04-2005",

}

TY - JOUR

T1 - Household magnets can change the programmable shunt valve in hydrocephalus patients

AU - Liu, Sheng

AU - Greene, Richard

AU - Thomas, Gordon A.

AU - Madsen, Joseph R.

PY - 2005

Y1 - 2005

N2 - 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.

AB - 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.

KW - Hydrocephalus

KW - Magnetic field

KW - Pressure setting

KW - Programmable shunt vale

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M3 - Conference article

AN - SCOPUS:28444453263

SN - 1071-121X

SP - 22

EP - 23

JO - Proceedings of the IEEE Annual Northeast Bioengineering Conference, NEBEC

JF - Proceedings of the IEEE Annual Northeast Bioengineering Conference, NEBEC

M1 - 1.3.3

T2 - Proceedings of the 2005 IEEE 31st Annual Northeast Bioengineering Conference

Y2 - 2 April 2005 through 3 April 2005

ER -

Household magnets can change the programmable shunt valve in hydrocephalus patients

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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