MRI COMPATIBLE IMPLANTABLE DEVICES
The present invention is directed to a novel implantable lead design which ensures safe magnetic resonance imaging of patients with active metallic implants such as pacemakers, neurostimulators and implantable cardio defibrillators. It is known that radio frequency and gradient fields of the MRI sca...
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Main Authors | , |
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Format | Patent |
Language | English French |
Published |
21.08.2008
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Subjects | |
Online Access | Get full text |
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Summary: | The present invention is directed to a novel implantable lead design which ensures safe magnetic resonance imaging of patients with active metallic implants such as pacemakers, neurostimulators and implantable cardio defibrillators. It is known that radio frequency and gradient fields of the MRI scanners may induce harmful currents on the implant leads. The present invention provides for the use of semiconductor components such as transistors and diodes to prevent such undesired induced currents on the implant leads. Circuits on the implants are designed such that while the induction of currents is prevented, the desired signal transmission in between the implanted pulse generator and the body part is maintained.
L'invention concerne une nouvelle conception de fil implantable qui assure une imagerie par résonance magnétique inoffensive pour les patients ayant des implants métalliques actifs tels que des stimulateurs cardiaques, des neurostimulateurs et des cardiodéfibrillateurs implantables. On sait que des champs de radiofréquence et de gradient des scanners IRM peuvent induire des courants nocifs sur les fils de l'implant. La présente invention propose l'utilisation de composants à semi-conducteur tels que des transistors et des diodes pour empêcher de tels courants induits non souhaités sur les fils d'implant. Des circuits sur les implants sont conçus de telle sorte que lorsque l'induction de courant est empêchée, la transmission de signal souhaitée entre le générateur d'impulsions implanté et la partie de corps est maintenue. |
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Bibliography: | Application Number: WO2007US87926 |