WO2008106717A1 - Système transcutané de transfert d'énergie - Google Patents

Système transcutané de transfert d'énergie Download PDF

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Publication number
WO2008106717A1
WO2008106717A1 PCT/AU2008/000271 AU2008000271W WO2008106717A1 WO 2008106717 A1 WO2008106717 A1 WO 2008106717A1 AU 2008000271 W AU2008000271 W AU 2008000271W WO 2008106717 A1 WO2008106717 A1 WO 2008106717A1
Authority
WO
WIPO (PCT)
Prior art keywords
coil
controller
patient
implantable
housing
Prior art date
Application number
PCT/AU2008/000271
Other languages
English (en)
Inventor
Peter Joseph Ayre
Original Assignee
Ventrassist Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2007901072A external-priority patent/AU2007901072A0/en
Application filed by Ventrassist Pty Ltd filed Critical Ventrassist Pty Ltd
Publication of WO2008106717A1 publication Critical patent/WO2008106717A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive loop type
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/50—Details relating to control
    • A61M60/508—Electronic control means, e.g. for feedback regulation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/80—Constructional details other than related to driving
    • A61M60/855—Constructional details other than related to driving of implantable pumps or pumping devices
    • A61M60/871—Energy supply devices; Converters therefor
    • A61M60/873—Energy supply devices; Converters therefor specially adapted for wireless or transcutaneous energy transfer [TET], e.g. inductive charging
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/372—Arrangements in connection with the implantation of stimulators
    • A61N1/37211—Means for communicating with stimulators
    • A61N1/37217—Means for communicating with stimulators characterised by the communication link, e.g. acoustic or tactile
    • A61N1/37223—Circuits for electromagnetic coupling
    • A61N1/37229—Shape or location of the implanted or external antenna
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/372—Arrangements in connection with the implantation of stimulators
    • A61N1/378—Electrical supply
    • A61N1/3787—Electrical supply from an external energy source
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/82—Internal energy supply devices
    • A61M2205/8237—Charging means
    • A61M2205/8243—Charging means by induction
    • H04B5/24—
    • H04B5/79—

Definitions

  • the present invention relates to transcutaneous energy transfer systems
  • TETS TETS and to devices and systems associated therewith.
  • a TETS comprising two coils positioned on opposite sides of the patient's skin layer allowing for receipt and transmission of electrical signals and current without the need for a percutaneous lead.
  • the first coil is positioned externally relative to the patient and second implanted coil positioned on the opposed side of the skin layer and mounted in parallel to the first coil.
  • the main disadvantage with these types of systems is that the coils are generally fragile and prone to breakage during normal use. If the internal coil breaks the implantable medical device (IMD) which the TETS is powering will fail to receive power and stop. In situations where the IMD aids a critical bodily function, for example where blood pumps assist the heart in pumping blood through the body, this may cause a serious adverse event for the patient.
  • IMD implantable medical device
  • a transcutaneous energy transfer system for use with an implantable medical device (DvID), the system comprising: an implantable controller in a controller housing; a first implantable coil electrically connected to the controller; and a second implantable coil in or on the controller housing and electrically connected to the controller; wherein the first and second coils are selectively electrically transcutaneously connectable to a third coil across a skin layer of the patient to provide an electrical path to the controller from a power source in communication with the third coil and external to the patient.
  • TETS transcutaneous energy transfer system
  • DvID implantable medical device
  • the external power source may be used to provide power to the implantable controller.
  • the second coil on or in the controller housing, there is a resultant reduction of necessary implanted material within the patient's body compared to a system using two internal coils which are separate to and electrically connected to the controller. This reduces the number of implantation sites within the patient's body, thus reducing inconvenience, patient lack of comfort, post operative infection risk, etc.
  • the second coil may be encapsulated in or on the controller housing.
  • the system may comprise a rechargeable power source electrically connected to the controller and located within the controller housing.
  • the external power source may therefore be able to recharge the rechargeable power source.
  • the housing may comprise a substantially planar surface to which the second coil is mounted.
  • the first and/or the second coils are configured for implantation immediately beneath the skin layer of the patient.
  • the first coil may also be configured for implantation between the skin layer and one or more ribs of the patient.
  • At least one said coil is encapsulated in a relatively flexible biocompatible shielding material.
  • the biocompatible shielding material may be silicone or polyurethane.
  • At least one coil may be formed from Litz wire.
  • the IMD is a blood pump.
  • the controller may be configured to control the DVID.
  • the system may comprise the third coil.
  • the system comprises a second controller associated with the third coil and adapted for communication with the first mentioned controller via the electrical connection between either the third coil and the first coil or the third coil and the second coil.
  • the first and/or the second controller may be configured to detect a fault in the first coil and/or the electrical connection between the first coil and the first controller.
  • a transcutaneous energy transfer system for use with an implantable medical device (IMD), the system comprising: an implantable controller in a controller housing; a first implantable coil electrically connected to the controller; a second implantable coil in or on the controller housing and electrically connected to the controller; and a third coil which is selectively electrically transcutaneously connectable to the first coil or the second coil across a skin layer of a patient to provide an electrical path from a power source external to the patient to the controller.
  • the second coil may be encapsulated in or on the controller housing.
  • the system comprises a rechargeable power source electrically connected to the controller and located within the controller housing.
  • the housing may comprise a substantially planar surface to which the second coil is mounted.
  • At least one coil is formed from Litz wire.
  • the IMD may be a blood pump.
  • the controller may be configured to control the IMD.
  • the system may comprise a second controller associated with the third coil and adapted for communication with the first mentioned controller via the electrical connection between either the third coil and the first coil or the third coil and the second coil.
  • the first and/or the second controller are configured to detect a fault in the first coil and/or the electrical connection between the first coil and the first controller.
  • an implantable medical device comprising the transcutaneous energy transfer system of any of the above described aspects.
  • the device may comprise a blood pump in fluid communication with the patient's heart, the pump being controllable by the controller. - A -
  • aspects of the invention may comprise methods of using the TETS of any one of the above described aspects or optional features thereof.
  • a transcutaneous energy transfer device for use with an implantable medical device (IMD) wherein said device includes: first coil mounted externally relative to the skin layer of a patient; second coil mounted below the skin layer of the patient and is electrically connected to an implanted controller of the IMD; third coil encapsulated within an implanted controller housing and implanted within the patient; and wherein the second coil or third coil are electrically coupled to the first coil and when the first coil is energised with a first current, a second current is induced in either the coupled second or third coil to communicate electrical current to the implanted controller.
  • IMD implantable medical device
  • the third coil may be activated when a fault is detected with the second coil.
  • the second and third coils may be implanted parallel to the skin layer of patient.
  • the third coil may be implanted in the abdomen of the patient.
  • the second coil may be implanted between the ribs and skin layer of a patient generally proximal to a clavicle bone.
  • a t least one coil may be encapsulated in a relatively flexible biocompatible shielding material.
  • the biocompatible shielding material may be silicone, or polyurethane.
  • At least one coil may be constructed of Litz wire.
  • the IMD may be a rotary blood pump.
  • a transcutaneous energy transfer device for use with a rotary blood pump implanted within a patient said device comprising an external coil and two spaced apart internal coils, wherein said external coil can selectively be electrically coupled to either of said internal coils.
  • One of said internal coils may be implanted between the skin layer and ribs of the patient and the other implanted within the abdomen.
  • the internal coil implanted within the abdomen may be mounted on the housing of a controller electrically connected to said pump.
  • Figure 1 is a schematic view of a preferred embodiment of a TETS
  • Figure 2 is a transparent view of a patient implanted with the embodiment of the TETS and IMD illustrated in Figure 1.
  • a first preferred embodiment comprises an implantable medical device (IMD) which includes a transcutaneous energy transfer system (TETS) 10.
  • IMD in this embodiment is a Left Ventricular Assist Device (LVAD) 1 1, however in alternative embodiments may be another type of heart assist device or other IMD such as a pacemaker.
  • the LVAD 11 comprises a blood pump 12 which is connected to the circulatory system of a patient P and fully implanted in the body B of the patient P. This connection of the pump 12 to the patient P is made between a cored hole in the apex A of the left ventricle LV of the patient's heart H and a portion of the ascending aorta AA.
  • An inflow cannula 14 connects the left ventricle LV to the blood pump 12.
  • An outflow cannula 16 connects the ascending aorta AA to the blood pump 12.
  • the outflow cannula 16 is preferably made of a woven DacronTM mesh or velour and the inflow cannula 14 is preferably constructed of injection moulded silicone.
  • the pump 12 is connected to and controlled by an implantable controller 18 by way of cabling 20.
  • the controller 18 is encapsulated within a housing 21, which is constructed of a biocompatible and fluid impermeable material such as moulded silicone, polyurethane (PU), polyetheretherketone (PEEK), titanium alloy, or a combination of these materials.
  • the implanted controller 18 includes an electronic control system for the pump 12 and a rechargeable battery 24 which is charged by the TETS and which provides power to the controller 18 and to the pump 12.
  • the TETS comprises first and second internal coils 26, 28 configured for electrical transcutaneous connection to a third external coil 30.
  • the first coil 26 is electrically connected to the controller 18 by way of cabling 32.
  • the first coil 26 is implanted on the anterior side of the patient P proximal to a clavicle bone.
  • the first coil 26 is preferably implanted on the ribs of the patient P between the skin layer SL and ribs. Mounting the first coil 26 on the ribs of the patient P assists in stabilising the implantation of the coil 26 and preventing lateral movement or dislodgement of the first coil 26. It is believed that this location of the first coil 26 is convenient for patients when connecting to the external coil 30, the connection of which will be described in more detail below.
  • the first coil 26 is implanted to be generally parallel with the skin layer SL of the patient P.
  • the first coil 26 may be made capable of flexing, if, for example, no Electromagnetic Force (EMF) backing plate is included within the design of the first coil 26.
  • EMF Electromagnetic Force
  • the second coil 28 is on a substantially planar surface 36 of the controller housing 21.
  • the second coil 28 is fixed to the controller surface 36 by coating of silicone over the second coil 28 on the controller surface 36.
  • An EMF backing plate 38 is located between the second coil 28 and the housing 21.
  • the EMF backing plate increases and better directs the EMF flux generated by the coils and thereby greatly increases the transfer efficiency of the TETS.
  • the controller 18 is implanted such that the second implanted coil 28 is adjacent the inner abdominal wall in the gut.
  • the first coil 26 may also be backed with an EMF backing plate.
  • an EMF backing plate may reduce the overall flexibility of the first coil as EMF backing plates generally comprise ferrites, which can be rigid.
  • the combined effect of the first and second coils 26, 28 are to allow the pump 12 to be powered without the need for a permanent exit wound or a percutaneous lead, which is commonly used to power blood pumps, such as rotary blood pumps.
  • the first and second inner coils 26, 28 of the TETS are configured for transcutaneous electrical communication with the external third coil 30.
  • the third coil 30 is selectively electrically transcutaneously connectable to either of the first and second coils 26,28 and in this embodiment is itself connected to a second controller and power source 40 (eg battery or mains power) to provide power to the first mentioned controller 18 and/or power to recharge the internal battery 24 when in electrical transcutaneous communication with the first or second coil 26,28.
  • a second controller and power source 40 eg battery or mains power
  • the third coil 30 may be connected only to a power source, such as a battery and/or mains power supply, and not to a controller.
  • a patient P will likely have available to them several external devices which include an external TETS coil 30 and power supply (either battery or mains power connection), or a TETS coil 30, power supply and controller.
  • the power supply is a battery, typically with a charge which may last 2-3 hours
  • the user may have several such external coil and battery combinations to allow for battery exchange when a battery in use runs out of charge.
  • a user who is using an external coil with battery may exchange their coil and battery for a coil and mains power supply combination when in an environment where they are unlikely to need to move far from the mains power supply.
  • the implanted controller 18 includes an internal battery 24 in communication therewith, it is possible for the patient to use the TETS without connection to the external coil 30 for short periods of time determined by the amount of charge of the internal battery 24.
  • the internal battery 24 may have enough charge to power the pump 12 for periods of thirty minutes to two or more hours.
  • the TETS may also carry encrypted data signals to relay information to and from the controller and the external controller 40.
  • the information can be relayed via the electrical transcutaneous connection between the first or second internal coil 26,28 and the external coil 30.
  • the external controller 40 is selectively connectable by cable or wirelessly to a personal computer or laptop 42 running software such as graphical user interface (GUI) software.
  • the software is capable of one or more of updating the controllers' software, reprogramming the controllers, reading and archiving patient data, and graphically displaying patient and pump data.
  • the second coil 28 is generally a backup TETS coil for use in situations where the first coil 26 ceases to function.
  • the wire connection between the first coil 26 and the controller may fail due to unusual fatigue or patient injury.
  • the patient using the blood pump 12 can use the second implanted coil 28 instead of using the first coil 26. In this manner, patient safety is not compromised during TETS failure and patients are not endangered.
  • the external controller 40 attached to the external coil 30 has an alarm 44 which indicates to the user that they need to switch their transcutaneous connection with the external coil 40 from the first coil 26 to the second coil 28.
  • the alarm indication may include a visual and/or an aural cue.
  • the TETS can be arranged such that patients can select to use either the first 26 or second coil 28 depending on their individual preference. For example, if the patient experiences localised pain proximal to the implantation site of one of the coils, the patient can alleviate the problem by switching his transcutaneous connection with the external coil 30 to the other of the coils.
  • the second coil 28 and/or the implanted controller housing 21 may be at least partially coated with a material to induce tissue in-growth and fixation within the patient's body.
  • Materials for such a coating may include: textured silicone, DacronTM or velour.
  • the coils include centring magnets 46 to hold the first and external coils 26, 30 or the second and externals coils 28,30 in a close facing yet transcutaneous relationship. The centring magnets 46 help the patient P to easily and properly align the coils by feel.
  • the centring magnets 46 in this embodiment are permanent rare earth magnets.
  • the coils 26,28,30 of the aforementioned embodiments are constructed of specialised copper wire called Litz wire. Litz wire is a special type of wire generally used in electronics.
  • Litz wire is generally used to make inductors and transformers, especially for high frequency applications where the skin effect is more pronounced. Litz wire is often prone to material fatigue, if the wire is repeatedly flexed beyond its limits.
  • the wire may be encapsulated within a relatively flexible and fluid impermeable polymer which acts a barrier or shield for the coils.
  • a relatively flexible and fluid impermeable polymer which acts a barrier or shield for the coils.
  • the material that may be suitable for this shielding include: perfluoroalkoxy polymer resin ('PFA'), polyurethane ('PU'), polyetheretherketone (PEEK), silicone, and/or Parylene C.
  • Further embodiments of the present invention may include multiple backup coils to replace the third coil 30 thereby increasing safety and reliability of the system.
  • the second coil 28 is fixed to the outer planar surface 36 of the controller housing 21. In an alternative embodiment, the second coil 28 is located within the controller housing 21. It may be magnetically shielded from the controller electrical components.
  • the second coil 28 may be in electrical communication with the implantable controller 18, but separate thereto.

Abstract

L'invention concerne un système transcutané de transfert d'énergie (TETS) destiné à être utilisé avec un dispositif médical implantable (IMD), tel qu'un dispositif d'assistance cardiaque ou une pompe sanguine rotative. Le système comprend un dispositif de commande implantable dans un boîtier de dispositif de commande, une première bobine implantable, raccordée électriquement au dispositif de commande, et une seconde bobine implantable dans ou sur le boîtier de dispositif de commande et raccordée électriquement au dispositif de commande. Les première et seconde bobines peuvent sélectivement être raccordées électriquement de façon transcutanée à une troisième bobine à travers une couche de la peau du patient pour permettre un trajet électrique jusqu'au dispositif de commande depuis une source d'alimentation en communication avec la troisième bobine et externe au patient. La seconde bobine peut être encapsulée dans ou sur le boîtier de dispositif de commande.
PCT/AU2008/000271 2007-03-02 2008-03-03 Système transcutané de transfert d'énergie WO2008106717A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2007901072A AU2007901072A0 (en) 2007-03-02 Improvements to Transcutaneous Energy Transfer Devices and Systems
AU2007901072 2007-03-02

Publications (1)

Publication Number Publication Date
WO2008106717A1 true WO2008106717A1 (fr) 2008-09-12

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Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012087811A2 (fr) * 2010-12-20 2012-06-28 Abiomed, Inc. Module compact de batterie et de dispositif de commande pour un système de transfert d'énergie par voie transcutanée
WO2012087819A2 (fr) * 2010-12-20 2012-06-28 Abiomed, Inc. Système de transfert d'énergie par voie transcutanée ayant un circuit d'avertissement à induction de vibrations
US8620447B2 (en) 2011-04-14 2013-12-31 Abiomed Inc. Transcutaneous energy transfer coil with integrated radio frequency antenna
US9002469B2 (en) 2010-12-20 2015-04-07 Abiomed, Inc. Transcutaneous energy transfer system with multiple secondary coils
US9002468B2 (en) 2011-12-16 2015-04-07 Abiomed, Inc. Automatic power regulation for transcutaneous energy transfer charging system
WO2015192076A1 (fr) * 2014-06-12 2015-12-17 Heartware, Inc. Connecteur percutané avec capuchon magnétique et procédés d'utilisation associés
US9220826B2 (en) 2010-12-20 2015-12-29 Abiomed, Inc. Method and apparatus for accurately tracking available charge in a transcutaneous energy transfer system
CN105797227A (zh) * 2016-05-16 2016-07-27 北京精密机电控制设备研究所 一种植入式心室辅助装置及供电方法
WO2017025606A1 (fr) * 2015-08-12 2017-02-16 Nuheart As Système, appareil et procédé de transfert de courant sans contact amélioré dans des dispositifs implantables
US9855376B2 (en) 2014-07-25 2018-01-02 Minnetronix, Inc. Power scaling
US10149933B2 (en) 2014-07-25 2018-12-11 Minnetronix, Inc. Coil parameters and control
US10193395B2 (en) 2015-04-14 2019-01-29 Minnetronix, Inc. Repeater resonator
US10335528B2 (en) 2016-10-07 2019-07-02 Nuheart As Transcatheter method and system for the delivery of intracorporeal devices
US10342908B2 (en) 2015-01-14 2019-07-09 Minnetronix, Inc. Distributed transformer
US10406267B2 (en) 2015-01-16 2019-09-10 Minnetronix, Inc. Data communication in a transcutaneous energy transfer system
WO2019177857A1 (fr) * 2018-03-14 2019-09-19 Heartware, Inc. Bobine de transfert de puissance rf pour pompes vad implantables
WO2019183126A1 (fr) * 2018-03-20 2019-09-26 Tc1 Llc Jauge mécanique pour estimer des changements d'inductance dans des systèmes de transfert d'énergie par résonance comportant des bobines souples destinée à être utilisée avec des dispositifs médicaux implantés
US10537670B2 (en) 2017-04-28 2020-01-21 Nuheart As Ventricular assist device and method
US10537672B2 (en) 2016-10-07 2020-01-21 Nuheart As Transcatheter device and system for the delivery of intracorporeal devices
RU2713108C1 (ru) * 2019-06-14 2020-02-03 федеральное государственное бюджетное образовательное учреждение высшего образования "Уфимский государственный авиационный технический университет" Устройство для беспроводной чрескожной передачи энергии сердечному насосу
CN111132707A (zh) * 2017-09-26 2020-05-08 心脏器械股份有限公司 使用柔性人造皮肤传感阵列的仪器化传动系
US10888646B2 (en) 2017-04-28 2021-01-12 Nuheart As Ventricular assist device and method
US10893847B2 (en) 2015-12-30 2021-01-19 Nuheart As Transcatheter insertion system
WO2021113215A1 (fr) * 2019-12-04 2021-06-10 Medtronic, Inc. Dispositif médical implantable comprenant un dispositif de fixation de câble
US11110266B2 (en) 2014-03-17 2021-09-07 Nuheari As Transcatheter system and method for regulating flow of fluid between two anatomical compartments

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WO2005000391A1 (fr) * 2003-06-30 2005-01-06 Entific Medical Systems Ab Liaison inductive pour implant medical
EP1614445A1 (fr) * 2004-06-24 2006-01-11 Ethicon Endo-Surgery, Inc. Bobines secondaires, jumelles et spatialement détachées pour optimiser les caractéristiques de transfert de puissance du transfert d'énergie transcutanée (TET)

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2654878A4 (fr) * 2010-12-20 2018-02-28 Abiomed, Inc. Système de transfert d'énergie par voie transcutanée ayant de multiples bobines secondaires
WO2012087819A2 (fr) * 2010-12-20 2012-06-28 Abiomed, Inc. Système de transfert d'énergie par voie transcutanée ayant un circuit d'avertissement à induction de vibrations
WO2012087811A3 (fr) * 2010-12-20 2012-10-18 Abiomed, Inc. Module compact de batterie et de dispositif de commande pour un système de transfert d'énergie par voie transcutanée
WO2012087819A3 (fr) * 2010-12-20 2013-01-17 Abiomed, Inc. Système de transfert d'énergie par voie transcutanée ayant un circuit d'avertissement à induction de vibrations
US8766788B2 (en) 2010-12-20 2014-07-01 Abiomed, Inc. Transcutaneous energy transfer system with vibration inducing warning circuitry
US9002469B2 (en) 2010-12-20 2015-04-07 Abiomed, Inc. Transcutaneous energy transfer system with multiple secondary coils
WO2012087811A2 (fr) * 2010-12-20 2012-06-28 Abiomed, Inc. Module compact de batterie et de dispositif de commande pour un système de transfert d'énergie par voie transcutanée
US9220826B2 (en) 2010-12-20 2015-12-29 Abiomed, Inc. Method and apparatus for accurately tracking available charge in a transcutaneous energy transfer system
US8620447B2 (en) 2011-04-14 2013-12-31 Abiomed Inc. Transcutaneous energy transfer coil with integrated radio frequency antenna
US9002468B2 (en) 2011-12-16 2015-04-07 Abiomed, Inc. Automatic power regulation for transcutaneous energy transfer charging system
US11110266B2 (en) 2014-03-17 2021-09-07 Nuheari As Transcatheter system and method for regulating flow of fluid between two anatomical compartments
WO2015192076A1 (fr) * 2014-06-12 2015-12-17 Heartware, Inc. Connecteur percutané avec capuchon magnétique et procédés d'utilisation associés
US9647386B2 (en) 2014-06-12 2017-05-09 Heartware, Inc. Percutaneous connector and associated methods of use
US9855376B2 (en) 2014-07-25 2018-01-02 Minnetronix, Inc. Power scaling
US10898628B2 (en) 2014-07-25 2021-01-26 Minnetronix, Inc. Coil parameters and control
US10149933B2 (en) 2014-07-25 2018-12-11 Minnetronix, Inc. Coil parameters and control
US10376625B2 (en) 2014-07-25 2019-08-13 Minnetronix, Inc. Power scaling
US10342908B2 (en) 2015-01-14 2019-07-09 Minnetronix, Inc. Distributed transformer
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