Abstract:
We investigated the energy transferring system whose temperature rise was reduced below 2 degrees in case of energy transmission of 20 watts. The system was developed for...Show MoreMetadata
Abstract:
We investigated the energy transferring system whose temperature rise was reduced below 2 degrees in case of energy transmission of 20 watts. The system was developed for energy consuming implantable devices, such as totally artificial heart (TAH) or multichannel functional electrical stimulation (FES). Electrical energy was transferred inductively through transcutaneous transformer made of amorphous magnetic fibers. We studied push-pull synchronous rectifier circuits for the implanted converter. Figure-of-eight coils were employed for signal transmission.
Published in: Proceedings of 18th Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Date of Conference: 31 October 1996 - 03 November 1996
Date Added to IEEE Xplore: 06 August 2002
Print ISBN:0-7803-3811-1
Citations are not available for this document.
Cites in Patents (11)Patent Links Provided by 1790 Analytics
1.
D'Ambrosio, Ralph L., "Method and apparatus for accurately tracking available charge in a transcutaneous energy transfer system"
Inventors:
D'Ambrosio, Ralph L.
Abstract:
Improved devices and methods for tracking power consumption and available charge in a transcutaneous energy transfer (TET) system are provided. The method includes measuring the available charge in a battery and the current rate of power consumption in an implanted medical device, determining the remaining time before the charge level of the battery reaches a predetermined threshold level, and communicating the remaining time to a user.
Assignee:
ABIOMED INC
Filing Date:
16 December 2011
Grant Date:
29 December 2015
Patent Classes:
Current International Class:
A61N0010800000, A61M0011200000, A61M0011000000, H02J0070000000
2.
Shea, Arthur; Ambrosio, Ralph D., "Automatic power regulation for transcutaneous energy transfer charging system"
Inventors:
Shea, Arthur; Ambrosio, Ralph D.
Abstract:
Methods and systems for controlling power output from an external power source in a transcutaneous energy transfer (TET) system are provided to prevent inadvertent energy transfer when no secondary coil is present. The system operates by transmitting power transcutaneously from an external primary coil and determining whether a response from a secondary coil implanted within a patient is detected. If no response is detected, the power output of the primary coil is decreased. The decrease in power output can be accomplished by operating the primary coil at a lower average power level, which can include variations in power level, duty cycle, etc. The system can also be configured to periodically repeat the process in order to continue searching for a coupled secondary coil.
Assignee:
ABIOMED INC
Filing Date:
16 December 2011
Grant Date:
07 April 2015
Patent Classes:
Current U.S. Class:
607061000
Current International Class:
A61N0010500000, A61N0013780000, A61N0010800000
3.
D'Ambrosio, Ralph L., "Transcutaneous energy transfer system with multiple secondary coils"
Inventors:
D'Ambrosio, Ralph L.
Abstract:
A transcutaneous energy transfer (TET) system is provided having a plurality of secondary coils adapted for disposition in a patient, at least one primary coil configured to transmit transcutaneous energy, and a controller adapted for disposition in a patient. The controller includes circuitry to isolate the secondary coils from each other and direct electric current from at least one of the secondary coils to a charge storage device and/or implantable medical device.
Assignee:
ABIOMED INC
Filing Date:
16 December 2011
Grant Date:
07 April 2015
Patent Classes:
Current U.S. Class:
607061000
Current International Class:
A61N0010800000, A61M0011200000, H02J0070200000
4.
D'Ambrosio, Ralph L., "Transcutaneous energy transfer system with vibration inducing warning circuitry"
Inventors:
D'Ambrosio, Ralph L.
Abstract:
An improved alarm device for use in a transcutaneous energy transfer (TET) system is provided. The device includes a processor configured to monitor at least one function of an implanted cardiac assist device and to generate an internal vibratory alarm.
Assignee:
ABIOMED INC
Filing Date:
16 December 2011
Grant Date:
01 July 2014
Patent Classes:
Current U.S. Class:
340539110, 340007600, 340573100
Current International Class:
G08B0010800000
5.
D'Ambrosio, Ralph L.; Kortyka, Martin, "Transcutaneous energy transfer coil with integrated radio frequency antenna"
Inventors:
D'Ambrosio, Ralph L.; Kortyka, Martin
Abstract:
Improved methods and devices for communicating via radio frequency (RF) in transcutaneous energy transfer (TET) systems is provided. In particular, an improved implantable coil for use in a transcutaneous energy transfer (TET) system is provided having an integrated radio frequency (RF) antenna. Further, a method of communicating between an external device and an implanted device having a plurality of secondary coils with integrated RF antennas is also provided.
Assignee:
ABIOMED INC
Filing Date:
16 December 2011
Grant Date:
31 December 2013
Patent Classes:
Current U.S. Class:
607061000, 600016000
Current International Class:
A61N0010000000
6.
SINGH, Amrita; PARIS, Francesca; GLANZMANN, Lee, Thomas; AYRE, Peter, Joseph, "TRANSCUTANEOUS ENERGY TRANSFER COIL ASSEMBLIES AND SYSTEMS"
Inventors:
SINGH, Amrita; PARIS, Francesca; GLANZMANN, Lee, Thomas; AYRE, Peter, Joseph
Abstract:
An energy transfer system, such as a transcutaneous system, comprises a primary coil device having a first quantity, shape or orientation of locating magnets and a secondary coil device configured for energy and/or data transfer with the primary coil device, the secondary coil device having a second quantity, shape or orientation of locating magnets. The first quantity, shape or orientation of locating magnets is different to the second quantity. The primary coil locating magnets and the secondary coil locating magnets are arranged such that the secondary coil device positionable in two or more different orientations with respect to the primary coil device.
Assignee:
VENTRASSIST PTY LTD
Filing Date:
18 August 2008
Grant Date:
26 February 2009
Patent Classes:
Current International Class:
A61N0013780000, A61N0010800000, A61N0014000000, A61B0180000000, A61N0013750000, H04R0250000000
7.
Zarinetchi, Farhad; Keville, Stephen J., "MAGNETIC SHIELD FOR PRIMARY COIL OF TRANSCUTANEOUS ENERGY TRANSFER DEVICE"
Inventors:
Zarinetchi, Farhad; Keville, Stephen J.
Abstract:
A transcutaneous energy transfer device is provided which has a magnetic shield covering the primary winding of the device to reduce sensitivity of the device to conducting objects in the vicinity of the coils and to increase the percentage of magnetic field generated by the primary coil which reaches the secondary coil. This shield is preferably larger than the primary coil in all dimensions and is either formed of a high permeability flexible material, for example a low loss magnetic material in a flexible polymer matrix, with perforations formed in the material sufficient to permit ventilation of the patient's skin situated under the shield, or the shield may be formed of segments of very high permeability material connected by a flexible, porous mesh material.
Assignee:
ABIOMED INC
Filing Date:
02 July 1999
Grant Date:
14 May 2002
Patent Classes:
Current U.S. Class:
607061000, 607060000, 607063000
Current International Class:
A61B0180000000
8.
Zarinetchi, Farhad; Hart, Robert M.; Verga, Michael G.; Keville, Stephen J., "TRANSCUTANEOUS ENERGY TRANSFER DEVICE WITH MAGNETIC FIELD PROTECTED COMPONENTS IN SECONDARY COIL"
Inventors:
Zarinetchi, Farhad; Hart, Robert M.; Verga, Michael G.; Keville, Stephen J.
Abstract:
The invention provides a transcutaneous energy transfer device having an external primary coil and an implanted secondary coil inductively coupled to the primary coil, electronic components subcutaneously mounted within the secondary coil and a mechanism which reduces inductive heating of such components by the magnetic field of the secondary coil. For one embodiment of the invention, the mechanism for reducing inductive heating includes a cage formed of a high magnetic permeability material in which the electronic components are mounted, which cage guides the flux around the components to prevent heating thereof. For an alternative embodiment of the invention, a secondary coil has an outer winding and either a counter-wound inner winding or an inner winding in the magnetic field of the outer winding. For either arrangement of the inner coil, the inner coil generates a magnetic field substantially canceling the magnetic field of the outer coil in the area in which the electronic components are mounted.
Assignee:
ABIOMED INC
Filing Date:
02 July 1999
Grant Date:
27 November 2001
Patent Classes:
Current U.S. Class:
607061000, 607033000
Current International Class:
A61N0013750000
9.
KEVILLE, Stephen, J.; ZARINETCHI, Farhad, "MAGNETIC SHIELD FOR PRIMARY COIL OF TRANSCUTANEOUS ENERGY TRANSFER DEVICE"
Inventors:
KEVILLE, Stephen, J.; ZARINETCHI, Farhad
Abstract:
A transcutaneous energy transfer device is provided which has a magnetic shield covering the primary winding of the device to reduce sensitivity of the device to conducting objects in the vicinity of the coils and to increase the percentage of magnetic field generated by the primary coil which reaches the secondary coil. This shield is preferably larger than the primary coil in all dimensions and is either formed of a high permeability flexible material, for example a low loss magnetic material in a flexible polymer matrix, with perforations formed in the material sufficient to permit ventilation of the patient's skin situated under the shield, or the shield may be formed of segments of very high permeability material connected by a flexible, porous mesh material.
Assignee:
ABIOMED INC
Filing Date:
06 July 1999
Grant Date:
02 May 2001
Patent Classes:
Current International Class:
A61N0013780000, H01F0381400000
10.
ZARINETCHI, Farhad; HART, Robert, M.; VERGA, Michael, G.; KEVILLE, Stephen, J., "TRANSCUTANEOUS ENERGY TRANSFER DEVICE WITH MAGNETIC FIELD PROTECTED COMPONENTS IN SECONDARY COIL"
Inventors:
ZARINETCHI, Farhad; HART, Robert, M.; VERGA, Michael, G.; KEVILLE, Stephen, J.
Abstract:
The invention provides a transcutaneous energy transfer device having an external primary coil and an implanted secondary coil inductively coupled to the primary coil, electronic components subcutaneously mounted within the secondary coil and a mechanism which reduces inductive heating of such components by the magnetic field of the secondary coil. For one embodiment of the invention, the mechanism for reducing inductive heating includes a cage formed of a high magnetic permeability material in which the electronic components are mounted, which cage guides the flux around the components to prevent heating thereof. For an alternative embodiment of the invention, a secondary coil has an outer winding and either a counter-wound inner winding or an inner winding in the magnetic field of the outer winding. For either arrangement of the inner coil, the inner coil generates a magnetic field substantially canceling the magnetic field of the outer coil in the area in which the electronic components are mounted.
Assignee:
ABIOMED INC
Filing Date:
06 July 1999
Grant Date:
13 January 2000
Patent Classes:
Current International Class:
A61N0013780000
11.
ZARINETCHI, Farhad; KEVILLE, Stephen, J., "MAGNETIC SHIELD FOR PRIMARY COIL OF TRANSCUTANEOUS ENERGY TRANSFER DEVICE"
Inventors:
ZARINETCHI, Farhad; KEVILLE, Stephen, J.
Abstract:
A transcutaneous energy transfer device is provided which has a magnetic shield covering the primary winding of the device to reduce sensitivity of the device to conducting objects in the vicinity of the coils and to increase the percentage of magnetic field generated by the primary coil which reaches the secondary coil. This shield is preferably larger than the primary coil in all dimensions and is either formed of a high permeability flexible material, for example a low loss magnetic material in a flexible polymer matrix, with perforations formed in the material sufficient to permit ventilation of the patient's skin situated under the shield, or the shield may be formed of segments of very high permeability material connected by a flexible, porous mesh material.
Assignee:
ABIOMED INC
Filing Date:
06 July 1999
Grant Date:
13 January 2000
Patent Classes:
Current International Class:
A61N0013780000, H01F0381400000
