Acoustic power transfer for implantable medical device
AssigneeMedtronic, Inc.
InventorsJerel Mueller, Sarah Offutt
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Abstract
In one aspect, the present disclosure is directed to an implantable medical device including a housing having a generally planar portion, and a piezoelectric transducer disposed within the housing, wherein at least a portion of the piezoelectric transducer is arranged at an oblique angle to the generally planar portion of the housing, and an electrode to deliver a neurostimulation therapy. The implantable medical device is configured to receive energy signals from an external device and transduce the received energy signals into electrical power.
Claims20
An implantable medical electrical stimulation device, comprising:
- an electrical stimulation therapy circuit operably coupled to one or more electrodes configured to deliver electrical stimulation therapy;
- a rechargeable battery configured to power the electrical stimulation therapy circuit;
- and
- an array of piezoelectric transducers, wherein each of the piezoelectric transducers includes a receiving face configured to receive transmitted ultrasonic waves in a frequency range of between about 100 kHz and about 5 MHz, convertible to a source of electrical energy for selective recharging of the rechargeable battery;
- and
- a feedback coil configured to generate an indication of the level of regenerative electrical power received from transmitted ultrasonic waves;
- wherein the array of piezoelectric transducers includes at least one transducer having a receiving face oriented at an oblique angle with respect to a poling axis of the transducer,
- wherein the receiving faces of the array of piezoelectric transducers are covered in a domed epoxy layer and biocompatible titanium casing layer configured to focus transmitted ultrasonic waves towards the receiving faces of the array of piezoelectric transducers, and
- wherein the array of piezoelectric transducers is configured to receive transmitted ultrasonic waves across a range of about 40 degrees relative to a central poling axis of the array of the piezoelectric transducers.
An implantable medical electrical stimulation device, comprising:
- a biocompatible titanium casing;
- an electrical stimulation therapy circuit housed within the biocompatible casing and configured to deliver electrical stimulation therapy;
- a rechargeable battery configured to power the electrical stimulation therapy circuit;
- and
- one or more piezoelectric transducers, each of the piezoelectric transducers including a receiving face configured to received transmitted ultrasonic waves convertible to a source of electrical energy for selective recharging of the rechargeable battery, wherein the biocompatible casing includes a domed protrusion configured to focus transmitted ultrasonic waves towards the receiving faces of the one or more piezoelectric transducers to enable receipt of transmitted ultrasonic waves across a wide range of angles.
Dependencies are inferred from the claim text.