Self-powered prosthesis
Disclosed herein are implants with sensors and methods for powering implants with sensors. A joint implant according to the present disclosure can include a first implant and a second implant in contact with the first implant. The first implant can be coupled to a first bone of a joint. The first implant can include an energy generator coupled to a transducer. The second implant can include at least one sensor, a battery coupled to the at least one sensor, and a receiver coupled to the battery. The receiver can be disposed within the second implant adjacent the transducer. Energy from the energy generator can be transmitted from the transducer of the first implant to the receiver of the second implant.
1 . A joint implant comprising:
a first implant configured to be coupled to a first bone of a joint, the first implant including an energy generator coupled to a transducer, the transducer being disposed within the first implant, and
a second implant disposed adjacent the first implant, the second implant including:
at least one sensor;
a battery coupled to the least one sensor, and
a receiver coupled to the battery, the receiver being disposed within the second implant adjacent the transducer,
wherein energy from the energy generator is transmitted from the transducer of the first implant to the receiver of the second implant.
2 . The joint implant of claim 1 , wherein energy from the energy generator is acoustically transmitted from the transducer of the first implant to the receiver of the second implant.
3 . The joint implant of claim 2 , wherein the transducer is an ultrasonic transducer.
4 . The joint implant of claim 3 , wherein the receiver is an ultrasonic receiver.
5 . The joint implant of claim 4 , wherein energy from the energy generator is ultrasonically transmitted from the ultrasonic transducer of the first implant to the ultrasonic receiver of the second implant.
6 . The joint implant of claim 1 , wherein the energy generator includes a plurality of magnets.
7 . The joint implant of claim 6 , wherein the energy generator generates energy by magnetic induction caused by motion between the plurality of magnets.
8 . The joint implant of claim 7 , wherein the motion between the plurality of magnets is caused by joint implant motion.
9 . The joint implant of claim 7 , wherein the energy generator includes one or more biasing elements coupled to the magnets.
10 . The joint implant of claim 9 , wherein the biasing elements are springs or biasing magnets.
11 . The joint implant of claim 1 , wherein the energy generator includes triboelectric material.
12 . The joint implant of claim 11 , wherein the triboelectric material includes a first triboelectric layer with a first electron affinity and a second triboelectric layer with a second electron affinity, the first electron affinity being different from the second electron affinity.
13 . The joint implant of claim 12 , wherein the first triboelectric layer is separated by a distance from the second triboelectric layer.
14 . The joint implant of claim 13 , wherein a motion of the joint implant causes the distance to vary to generate energy.
15 . The joint implant of claim 12 , wherein the first triboelectric layer slides along the second triboelectric layer during joint implant motion to generate energy.
16 . An implant system comprising:
a first implant configured to be coupled to a first bone of a joint, the first implant including an energy generator coupled to a transducer, the transducer being disposed within the first implant, and
a second implant disposed adjacent the first implant, the second implant including:
at least one sensor, and
a receiver coupled to the at least one sensor, the receiver being disposed within the second implant adjacent the transducer,
wherein energy from the energy generator is acoustically transmitted from the transducer of the first implant to the receiver of the second implant.
17 . The implant system of claim 16 , wherein the transducer is an ultrasonic transducer, and the receiver is an ultrasonic receiver.
18 . The implant system of claim 17 , wherein energy from the energy generator is ultrasonically transmitted from the ultrasonic transducer of the first implant to the ultrasonic receiver of the second implant.
19 . A method for powering a joint implant, the method comprising the steps of:
providing a first implant configured to be placed on a first bone;
coupling an energy generator of the first implant to a transducer, the transducer being disposed within the first implant;
providing a second implant configured to be placed in contact with the first implant;
coupling at least one sensor disposed within the second implant to a battery, the battery being disposed within the second implant;
coupling a receiver to the battery, the receiver being disposed within the second implant adjacent the transducer, and
transmitting energy from the energy generator to the transducer of the first implant to the receiver of the second implant.
20 . The method of claim 19 , wherein the step of transmitting energy includes acoustically transmitting energy from the transducer of the first implant to the receiver of the second implant.