Compact inductive arrangement for medical implant data and power transfer
First Claim
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1. A system for providing transdermal communication with, and power to, a device implantable internal to the body of a patient, said system comprising:
- a) an external device;
b) said internal device;
c) a first ferromagnetic core;
d) a second ferromagnetic core;
e) first and second coils wound on the first ferromagnetic core and coupled to said external device;
f) first and second coils wound on the second ferromagnetic core and coupled to said internal device;
wherein the external and internal devices communicate in at least in one direction by means of inductive coupling between said first coil on said first core and said first coil on said second core and wherein power is transmitted from said external device to the internal device by means of inductive coupling between the second coil on said first core and second coil on said second core;
said coils being constructed and arranged to minimize interference between said first coils and said second coils respectively.
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Abstract
A system for providing transdermal communication with, and power to, a subcutaneously implanted device, for example the stimulator unit of a cochlear implant, by means of pairs of orthogonally wound, inductively coupled coils. The system provides a compact coil arrangement particularly suited to behind the ear and in-the ear multi-channel cochlear implants.
184 Citations
20 Claims
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1. A system for providing transdermal communication with, and power to, a device implantable internal to the body of a patient, said system comprising:
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a) an external device; b) said internal device; c) a first ferromagnetic core; d) a second ferromagnetic core; e) first and second coils wound on the first ferromagnetic core and coupled to said external device; f) first and second coils wound on the second ferromagnetic core and coupled to said internal device; wherein the external and internal devices communicate in at least in one direction by means of inductive coupling between said first coil on said first core and said first coil on said second core and wherein power is transmitted from said external device to the internal device by means of inductive coupling between the second coil on said first core and second coil on said second core; said coils being constructed and arranged to minimize interference between said first coils and said second coils respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A system for providing transdermal communication with, and power to, a device implantable internal to the body of a patient, said system comprising:
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a) an external device; b) said internal device; c) a first ferromagnetic core; d) a second ferromagnetic core; e) first and second coils wound on the first ferromagnetic core and coupled to said external device; f) first and second coils wound on the second ferromagnetic core and coupled to said internal device; wherein the external and internal devices communicate in at least in one direction by means of inductive coupling between said first coil on said first core and said first coil on said second core and wherein power is transmitted from said external device to the internal device by means of inductive coupling between the second coil on said first core and second coil on said second core; each said first coils being oriented substantially orthogonally with respect to the corresponding second coils so that the inductive coupling between said first coils is independent of the inductive coupling of said second coils. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification