Implantable medical device, medical system and method for data communication
First Claim
1. A method of communicating data from an implantable device to an external device, the method comprising:
- imposing an oscillatory electric field on body tissue surrounding an implantable device,sensing the oscillatory electric field imposed on the body tissue via the implantable device,one or more ofaltering the oscillatory electric field via the implantable device, byinducing an alternating change of impedance via the implantable device orgenerating a small oscillatory electric field via the implantable device, andgenerating a second oscillatory electric field which is phase synchronized to the oscillatory electric field imposed on the body tissue via the implantable device, andsensing the change of impedance or the small oscillatory electric field generated by the implantable device, respectively, using an external device, wherein the external device comprises or is connected to at least two cutaneous electrodes;
wherein the altering of the oscillatory electric field via the implantable device is performed by at least two electrodes operatively connected to or part of the implantable device, and by at least one switch operatively connected to the at least two electrodes,wherein the at least one switch is configured to connect and disconnect the at least two electrodes in an alternating manner according to a code generated by the implantable device representing data to be transmitted from the implantable device to the external device, andwherein said alternating connecting and disconnecting of the at least two electrodes causes a detectable change of impedance of the imposed oscillatory electric field; and
,wherein the at least one switch is connected to a switch control, and further comprising synchronizing the connecting and disconnecting of the at least two electrodes with the oscillatory electric field imposed on the body tissue via the switch control.
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Accused Products
Abstract
An implantable medical device including a data communication device that includes a device to alter and/or generate an oscillatory electric field imposed on body tissue surrounding the implantable medical device when the implantable medical device is in its implanted state. The device that alters an oscillatory electric field modulates an impedance of body tissue surrounding the implantable medical device when the implantable medical device is in its implanted state and within an oscillatory electric field. The device that alters an oscillatory electric field includes a device that generates an oscillatory electric field that is phase-synchronized with an oscillatory electric field imposed on body tissue surrounding the implantable medical device when the implantable medical device is in its implanted state.
18 Citations
10 Claims
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1. A method of communicating data from an implantable device to an external device, the method comprising:
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imposing an oscillatory electric field on body tissue surrounding an implantable device, sensing the oscillatory electric field imposed on the body tissue via the implantable device, one or more of altering the oscillatory electric field via the implantable device, by inducing an alternating change of impedance via the implantable device or generating a small oscillatory electric field via the implantable device, and generating a second oscillatory electric field which is phase synchronized to the oscillatory electric field imposed on the body tissue via the implantable device, and sensing the change of impedance or the small oscillatory electric field generated by the implantable device, respectively, using an external device, wherein the external device comprises or is connected to at least two cutaneous electrodes; wherein the altering of the oscillatory electric field via the implantable device is performed by at least two electrodes operatively connected to or part of the implantable device, and by at least one switch operatively connected to the at least two electrodes, wherein the at least one switch is configured to connect and disconnect the at least two electrodes in an alternating manner according to a code generated by the implantable device representing data to be transmitted from the implantable device to the external device, and wherein said alternating connecting and disconnecting of the at least two electrodes causes a detectable change of impedance of the imposed oscillatory electric field; and
,wherein the at least one switch is connected to a switch control, and further comprising synchronizing the connecting and disconnecting of the at least two electrodes with the oscillatory electric field imposed on the body tissue via the switch control. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of communicating data from an implantable device to an external device, the method comprising:
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imposing an oscillatory electric field on body tissue surrounding an implantable device, sensing the oscillatory electric field imposed on the body tissue via the implantable device, one or more of altering the oscillatory electric field via the implantable device, by inducing an alternating change of impedance via the implantable device or generating a small oscillatory electric field via the implantable device, and generating a second oscillatory electric field which is phase synchronized to the oscillatory electric field imposed on the body tissue via the implantable device, and sensing the change of impedance or the small oscillatory electric field generated by the implantable device, respectively, using an external device, wherein the external device comprises or is connected to at least two cutaneous electrodes, wherein the sensing of the change of impedance comprises sensing a current or voltage over the at least two cutaneous electrodes and integrating a sensed voltage or current over a number of cycles of the oscillatory electric field, wherein said number of cycles correspond to a frequency division factor of a frequency divider of the implantable device.
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10. A method of communicating data from an implantable device to an external device, the method comprising:
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imposing an oscillatory electric field on body tissue surrounding an implantable device, sensing the oscillatory electric field imposed on the body tissue via the implantable device, one or more of altering the oscillatory electric field via the implantable device, by inducing an alternating change of impedance via the implantable device or generating a small oscillatory electric field via the implantable device, and generating a second oscillatory electric field which is phase synchronized to the oscillatory electric field imposed on the body tissue via the implantable device, and sensing the change of impedance or the small oscillatory electric field generated by the implantable device, respectively, using an external device, wherein the external device comprises or is connected to at least two cutaneous electrodes, wherein the altering of the oscillatory electric field via the implantable device is performed by at least two electrodes operatively connected to or part of the implantable device, and by at least one switch operatively connected to the at least two electrodes, wherein the at least one switch is configured to connect and disconnect the at least two electrodes in an alternating manner according to a code generated by the implantable device representing data to be transmitted from the implantable device to the external device, wherein said alternating connecting and disconnecting of the at least two electrodes causes a detectable change of impedance of the imposed oscillatory electric field, and, wherein the code comprises a clock, and wherein the clock is a fraction of a frequency of the oscillatory electric field imposed on the body tissue surrounding the implantable device.
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Specification