Implantable medical device with a recharging coil magnetic shield
First Claim
1. An implantable medical device having an efficient recharging coil, comprising:
- a housing having an interior cavity, a proximal face, and an electrical feedthrough;
electronics carried in the housing interior cavity and configured to perform a medical therapy;
a rechargeable power source carried in the housing interior cavity and coupled to the electronics;
a secondary recharging coil coupled to the electronics and rechargeable power source, the secondary recharging coil having a distal side and having an axis; and
, a magnetic shield placed on the distal side of the recharging coil to improve recharging efficiency, the shield being approximately perpendicular to the axis of the secondary recharging coil and the shield being located between the recharging coil and the electronics.
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Accused Products
Abstract
A rechargeable implantable medical device with a magnetic shield placed on the distal side of a secondary recharging coil to improve recharging efficiency is disclosed. The rechargeable implantable medical device can be a wide variety of medical devices such as neuro stimulators, drug delivery pumps, pacemakers, defibrillators, diagnostic recorders, and cochlear implants. The implantable medical device has a secondary recharging coil carried over a magnetic shield and coupled to electronics and a rechargeable power source carried inside the housing. The electronics are configured to perform a medical therapy. Additionally a method for enhancing electromagnetic coupling during recharging of an implantable medical device is disclosed, and a method for reducing temperature rise during recharging of an implantable medical device is disclosed.
202 Citations
21 Claims
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1. An implantable medical device having an efficient recharging coil, comprising:
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a housing having an interior cavity, a proximal face, and an electrical feedthrough;
electronics carried in the housing interior cavity and configured to perform a medical therapy;
a rechargeable power source carried in the housing interior cavity and coupled to the electronics;
a secondary recharging coil coupled to the electronics and rechargeable power source, the secondary recharging coil having a distal side and having an axis; and
,a magnetic shield placed on the distal side of the recharging coil to improve recharging efficiency, the shield being approximately perpendicular to the axis of the secondary recharging coil and the shield being located between the recharging coil and the electronics. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 21)
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17. An implantable medical device having an efficient recharging coil, comprising:
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a housing having a interior cavity, a proximal face, and an electrical feedthrough;
electronics carried in the housing interior cavity and configured to perform a medical therapy;
a rechargeable power source carried in the housing interior cavity and coupled to the electronics;
a secondary recharging coil coupled to the electronics and rechargeable power source, the secondary recharging coil having a distal side and an axis; and
a magnetic shield placed on the distal side of the recharging coil to improve recharging efficiency, the shield being approximately perpendicular to the axis of the secondary recharging coil and the shield being located between the recharging coil and the electronics;
wherein the secondary recharging coil is an external secondary recharging coil located remotely away from the housing.
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18. An implantable medical device having an efficient recharging coil, comprising:
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a housing having an interior cavity, a proximal face, and an electrical feedthrough;
electronics carried in the housing interior cavity and configured to perform a medical therapy;
a rechargeable power source carried in the housing interior cavity and coupled to the electronics;
a secondary recharging coil coupled to the electronics and rechargeable power source, the secondary recharging coil having a distal side and an axis; and
a magnetic shield placed on the distal side of the recharging coil to improve recharging efficiency, the shield being approximately perpendicular to the axis of the secondary recharging coil and the shield being located between the recharging coil and the electronics;
wherein the recharging coil is located in the housing interior cavity.
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19. An implantable medical device having an efficient recharging coil, comprising:
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a housing having an interior cavity, a proximal face, and an electrical feedthrough;
electronics carried in the housing interior cavity and configured to perform a medical therapy;
a rechargeable power source carried in the housing interior cavity and coupled to the electronics;
a secondary recharging coil coupled to the electronics and rechargeable power source, the secondary recharging coil having a distal side and an axis; and
a magnetic shield placed on the distal side of the recharging coil to improve recharging efficiency, the shield being approximately perpendicular to the axis of the secondary recharging coil and the shield being located between the recharging coil and the electronics;
wherein the housing is an electric conductor.
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20. An implantable medical device having an efficient recharging coil, comprising:
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a housing having an interior cavity, a proximal face, and an electrical feedthrough;
electronics carried in the housing interior cavity and configured to perform a medical therapy;
a rechargeable power source carried in the housing interior cavity and coupled to the electronics;
a secondary recharging coil coupled to the electronics and rechargeable power source, the secondary recharging coil having a distal side and an axis; and
a magnetic shield placed on the distal side of the recharging coil to improve recharging efficiency, the shield being approximately perpendicular to the axis of the secondary recharging coil and the shield being located between the recharging coil and the electronics;
wherein the magnetic shield comprises a first magnetic shield and a second magnetic shield and a first insulator placed between the first magnetic shield and the second magnetic shield;
wherein the magnetic shield further comprises a third magnetic shield and a second insulator placed between the second magnetic shield and the third magnetic shield; and
wherein the housing is selected from the group consisting of;
titanium, ceramic, and epoxy.
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Specification