COMPOSITE RF CURRENT ATTENUATOR FOR A MEDICAL LEAD

A composite RF current attenuator for a medical lead includes a conductor having a distal electrode contactable to biological cells, a bandstop filter in series with the lead conductor for attenuating RF currents flow through the lead conductor at a selected center frequency or across a range of fre...

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Bibliographische Detailangaben
Hauptverfasser:	KONDABATNI KISHORE KUMAR, MOSCHIANO HOLLY NOELLE, STEVENSON ROBERT A, DABNEY WARREN S, FRUSTACI DOMINICK J, JOHNSON ROBERT SHAWN, SPAULDING JOSEPH E
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRONIC CIRCUITRY ELECTRICITY ELECTROTHERAPY HUMAN NECESSITIES HYGIENE IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS MAGNETOTHERAPY MEDICAL OR VETERINARY SCIENCE RADIATION THERAPY RESONATORS ULTRASOUND THERAPY
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Beschreibung
Zusammenfassung:	A composite RF current attenuator for a medical lead includes a conductor having a distal electrode contactable to biological cells, a bandstop filter in series with the lead conductor for attenuating RF currents flow through the lead conductor at a selected center frequency or across a range of frequencies about the center frequency, and a lowpass filter in series with the bandstop filter and forming a portion of the lead conductor. The bandstop filter has a capacitance in parallel with a first inductance. In a preferred form, the lowpass filter includes a second inductance in series with the bandstop filter, wherein the values of capacitance and inductances for the composite RF current attenuator are selected such that it attenuates MRI-induced RF current flow in an MRI environment.