# US 2019/0314564 A1 · Transcutaneous energy transfer systems

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- Number: US 2019/0314564 A1
- Document ID: US20190314564A1
- Status: Published application
- Kind: A1
- Application number: 16/454,704
- Filed: 2019-06-27
- Published: 2019-10-17
- Earliest claimed: 2014-04-15
- Assignees: HeartWare, Inc.
- Applicants: HeartWare, Inc.
- Inventors: John RUDSER; Stefan SCHWARZBACH
- Web page: https://patentgrep.com/patent/US20190314564A1

## CPC

- A61N 1/3787: {from an external energy source}
- A61M 60/178: drawing blood from a ventricle and returning the blood to the arterial system via a cannula external to the ventricle, e.g. left or right ventricular assist devices
- A61M 60/216: including a rotating member acting on the blood, e.g. impeller
- A61M 60/508: Electronic control means, e.g. for feedback regulation
- A61M 60/592: Communication of patient or blood pump data to distant operators for treatment purposes
- A61M 60/875: specially adapted for optimising alignment of external and implantable coils
- A61M 60/876: Implantable batteries
- A61N 1/37229: {Shape or location of the implanted or external antenna}
- H01F 38/14: Inductive couplings
- A61M 2205/8243: by induction
- H02J 50/10: using inductive coupling
- H02J 2105/46: Medical devices, medical implants or life supporting devices
- A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B)
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY

## Abstract

The present disclosure relates to an improved transcutaneous energy transfer (TET) system that generates and wirelessly transmits a sufficient amount of energy to power one or more implanted devices, including a heart pump, while maintaining the system's efficiency, safety, and overall convenience of use. The disclosure further relates one or more methods of operation for the improved system.

## Claims

### Claim at position 1

-2. (canceled)

### Claim 3

A transcutaneous energy transfer system comprising:
(a) an internal component adapted for mounting within the body of an animal, the internal component including:
an internal coil;
an internal device electrically connected to the internal coil for receipt of power from the internal coil; and
a telemetry transmitter operative to send telemetry signals representing one or more parameters relating to operation of the internal component; and
(b) an external component adapted for mounting outside of the body, the external component including:
an external coil;
a telemetry receiver adapted to receive the telemetry signals from the telemetry transmitter;
a current monitor operative to measure current flow in the external coil and to provide an indication of whether or not the external coil is electromagnetically coupled to the internal coil based on the measured current flow; and
a drive circuit operative in a normal mode of operation when the telemetry receiver receives the telemetry signals, and in a safe mode of operation when the telemetry receiver does not receive the telemetry signals, the drive circuit being operative in both the normal and safe modes to apply power to the external coil so that power applied to the external coil will be coupled to the internal coil, the circuit being operative to control the power applied to the external coil at least in part responsive to the telemetry signals when operating in the normal mode.

### Claim 4 (depends on 3)

The system as claimed in claim 3, wherein the drive circuit is operative to apply more power to the external coil in the normal mode than in the safe mode.

### Claim 5 (depends on 3)

The system as claimed in claim 3, wherein the drive circuit is operative, in the normal mode, to apply an amount of power to the external coil sufficient to power the internal device and the telemetry transmitter.

### Claim 6 (depends on 3)

The system as claimed in claim 3, further comprising a coupling detection circuit operative to provide an indication of whether or not the external coil is electromagnetically coupled to the internal coil, wherein the drive circuit is configured to operate in the safe mode only when the telemetry receiver does not receive the telemetry signals and the coupling detection circuit indicates that the external coil is inductively coupled to the internal coil.

### Claim 7 (depends on 3)

The system as claimed in claim 3, wherein the external coil, current monitor, and drive circuit are disposed within a common housing.

### Claim 8 (depends on 3)

The system as claimed in claim 3, wherein the drive circuit is operative to drive the external coil so as to supply at least about 20 watts of power to the internal device.

### Claim at position 8

-18. (canceled)