TESTING TUNED CIRCUITS
First Claim
1. A method of testing an implantable medical device, the implantable medical device including a tuned circuit having a coil for transferring energy between the implantable medical device and another device, the method comprising:
- inducing an EMF in the coil of the tuned circuit;
detecting a resonance of the tuned circuit in response to the EMF induced in the coil of the tuned circuit; and
analysing the detected resonance over a period of time to determine a property of the tuned circuit.
1 Assignment
0 Petitions
Accused Products
Abstract
Methods and systems for determining one or more parameters of a tuned circuit forming part of a wireless energy transmission system in an implanted (or implantable) medical device are described. The method involves energising the tuned circuit then receiving a signal back from it. This signal is then analysed to determine a property of the circuit such as its quality factor (Q) or resonant frequency. Also described herein is a method and system for determining the implantation depth of a component of an implanted medical device. The method involves determining the position of a magnetic element which is mounted in a fixed physical relationship with the component of the medical device. The methods can be performed on an implanted medical device without the need to explant the device.
-
Citations
26 Claims
-
1. A method of testing an implantable medical device, the implantable medical device including a tuned circuit having a coil for transferring energy between the implantable medical device and another device, the method comprising:
-
inducing an EMF in the coil of the tuned circuit; detecting a resonance of the tuned circuit in response to the EMF induced in the coil of the tuned circuit; and analysing the detected resonance over a period of time to determine a property of the tuned circuit. - View Dependent Claims (2, 3, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
4. The method of 1, wherein the analysing includes:
determining a quality factor (Q) of the tuned circuit as the property thereof.
-
5. The method of 1, wherein the analysing includes:
determining at least one resonant frequency of the tuned circuit as the property thereof.
-
14. A method of determining a property of a prosthetic device implanted in a device recipient, the implantable medical device including a tuned circuit having a coil for providing electrical coupling between a circuit of the prosthetic device and another device, the method including:
-
inducing an EMF in the coil of the tuned circuit; detecting a resonance of the tuned circuit in response to the EMF induced in the coil of the tuned circuit; and analysing the detected resonance over a period of time to determine a property of the tuned circuit. - View Dependent Claims (15)
-
-
16. A method of determining a position of a component of an implanted medical device, said component including a magnetic element positioned in a fixed spatial arrangement with respect to said component;
- the method comprising;
measuring a localised magnetic field produced by the magnetic element at a plurality of positions remote from the component; and analysing quantities representing the measured localised magnetic field at the plurality of said positions according to a model of the magnetic field produced by the magnetic element in order to determine the position of the magnetic element with respect to the plurality of positions. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
- the method comprising;
-
25. A system for testing an implantable medical device, the implantable medical device including a tuned circuit having a coil for transferring energy between the implantable medical device and another device, the system comprising:
-
means for inducing an EMF in the coil of the tuned circuit; means for detecting a resonance of the tuned circuit in response to the EMF induced in the coil of the tuned circuit; and means for analysing the detected resonance over a period of time to determine a property of the tuned circuit.
-
-
26. A system for determining a position of a component of an implanted medical device, said component including a magnetic element positioned in a fixed spatial arrangement with respect to said component;
- the system comprising;
means for measuring a localised magnetic field produced by the magnetic element at a plurality of positions remote from the component; and means for analysing quantities representing the measured localised magnetic field at the plurality of said positions according to a model of the magnetic field produced by the magnetic element in order to determine the position of the magnetic element with respect to the plurality of positions.
- the system comprising;
Specification