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US 2018/0021498 A1Published application
Tet system for implanted medical device
AssigneeHeartWare, Inc.
InventorsBarry M. YOMTOV, John Robert Batty
Life of this patent
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Abstract
A TET system is operable to vary an amount of power transmitted from an external power supply to an implantable power unit in accordance with a monitored condition of the implantable power unit. The amount of power supplied to the implantable power unit for operating a pump, for example, can be varied in accordance with a cardiac cycle, so as to maintain the monitored condition in the power circuit within a desired range throughout the cardiac cycle.
Claims13
(canceled)
A system, comprising:
- an implantable electrical device including a pump and a motor, the electrical device sized and configured to be received within a body of a patient;
- an implantable power unit configured for mounting within the body of the patient, the power unit having a receiving coil and a power circuit in communication with the receiving coil to transmit power from the receiving coil to the implantable electrical device;
- and
- a power supply external to the patient having:
- a transmitting coil adapted for transcutaneous mutual inductive coupling with the receiving coil, the transmitting coil and the receiving coil including a resonant frequency;
- a drive circuit configured to apply an alternating current having a variable transmission frequency to the transmitting coil;
- and
- a control circuit configured to maintain a difference between the transmission frequency and the resonant frequency.
5 more elements
Dependencies are inferred from the claim text.