In vivo alteration of Strata valve setting by vagus nerve stimulator-activating magnet.
We report the unexpected adjustment of a Strata shunt valve by a vagus nerve stimulator-activating magnet, resulting in symptomatic under-drainage of CSF. Implantable devices using magnets for calibration and activation are becoming more prevalent within neurosurgery and the present case highlights the potential for adverse interactions.
Guilfoyle
Mathew R
MR
Department of Neurosurgery, Addenbrooke's Hospital, Cambridge, UK. mrguilfoyle@gmail.com
Fernandes
H
H
Price
S
S
D000293:Adolescent; D004599:Electric Stimulation Therapy / Q000295:instrumentation*; D004868:Equipment Failure; D005260:Female; D006801:Humans; D006849:Hydrocephalus / Q000150:complications / Q000601:surgery*; D008280:Magnetics / Q000009:adverse effects*; D008581:Meningitis / Q000150:complications; D012640:Seizures / Q000209:etiology / Q000517:prevention & control*; D014630:Vagus Nerve; D017287:Ventriculoperitoneal Shunt / Q000295:instrumentation*