RESONANCE CIRCUIT FOR IMPLANTABLE DEVICES AND LEADS

摘要

An implantable medical assist device includes a medical device. The medical device has a housing and electronics contained therein. A lead provides an electrical path to or from the electronics within the medical device. A resonance tuning module is located in the housing and is connected to the lead. The resonance tuning module includes a control circuit for determining a resonant frequency of the implantable medical assist device and an adjustable impedance circuit to change the combined resonant frequency of the medical device and lead. Also, a stent structure includes a stent formed of a plurality of rings to form a lumen and a plurality of struts. Each strut provides a connection between two adjacent rings. The stent structure also includes a conductive trace and a dielectric material. The conductive trace has a first end and a second end. The conductive trace is formed on a portion of a first ring, on a portion of a second ring, and on struts between the first ring and the second ring to form an inductive conductive trace loop. The first end of the conductive trace overlaps the second end of the conductive trace such that the dielectric material is located between the first end of the conductive trace and the second end of the conductive trace to form a capacitor.