Method and apparatus for supplying energy to a medical device
First Claim
1. An apparatus configured to control inductive transmission of wireless energy supplied to an electrically operable medical device adapted to be implanted in a mammal patient, comprising:
- an external energy source adapted to be located outside the patient, comprising a primary coil adapted to transmit wireless energy,an internal energy receiver located inside the patient, comprising;
a secondary coil adapted to receive the wireless energy inductively, the internal energy receiver being connected or configured to be connected to the electrically operable medical device configured to directly or indirectly supplying the wirelessly received energy thereto, andat least one stabilizing unit to stabilize the wirelessly received energy in the electrically operable medical device,wherein the electrically operable medical device as adapted to transfer feedback control information to the external energy source,wherein the feedback control information is related to an energy for operating the medical device, said feedback control information being adapted to be used to control the transmission of wireless energy from the external energy source, andwherein the electrically operable medical device is adapted to consume, store or consume and store the wirelessly received energy after it has been stabilized in the at least one stabilizing unit of the electrically operable medical device,wherein the apparatus is configured to;
first transmit the wireless energy with a predetermined energy rate and second transmit the wireless energy based on an energy balance, adapted to be determined by detecting a direction and rate of change in a current amount of accumulated energy in the at least one stabilizing unit, wherein the rate of change is a speed of change of the energy balance, measured as accumulated energy in the stabilizing unit,wherein the apparatus is adapted to repeatedly detect the direction and speed of change in the current amount of accumulated energy in the at least one stabilizing unit, intermittently at certain intervals during ongoing energy transfer executed on a continuous basis during the transmission of wireless energy, andwherein the feedback control information is further related to the direction and speed of change in the current amount of accumulated energy in the at least one energy stabilizing unit.
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Abstract
In a method and apparatus for supplying wireless energy to a medical device (100) implanted in a patient, wireless energy is transmitted from an external energy source (104) located outside a patient and is received by an internal energy receiver (102) located inside the patient, for directly or indirectly supplying received energy to the medical device. An energy balance is determined between the energy received by the internal energy receiver and the energy used for the medical device, and the transmission of wireless energy is then controlled based on the determined energy balance. The energy balance thus provides an accurate indication of the correct amount of energy needed, which is sufficient to operate the medical device properly, but without causing undue temperature rise.
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Citations
19 Claims
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1. An apparatus configured to control inductive transmission of wireless energy supplied to an electrically operable medical device adapted to be implanted in a mammal patient, comprising:
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an external energy source adapted to be located outside the patient, comprising a primary coil adapted to transmit wireless energy, an internal energy receiver located inside the patient, comprising;
a secondary coil adapted to receive the wireless energy inductively, the internal energy receiver being connected or configured to be connected to the electrically operable medical device configured to directly or indirectly supplying the wirelessly received energy thereto, andat least one stabilizing unit to stabilize the wirelessly received energy in the electrically operable medical device, wherein the electrically operable medical device as adapted to transfer feedback control information to the external energy source, wherein the feedback control information is related to an energy for operating the medical device, said feedback control information being adapted to be used to control the transmission of wireless energy from the external energy source, and wherein the electrically operable medical device is adapted to consume, store or consume and store the wirelessly received energy after it has been stabilized in the at least one stabilizing unit of the electrically operable medical device, wherein the apparatus is configured to;
first transmit the wireless energy with a predetermined energy rate and second transmit the wireless energy based on an energy balance, adapted to be determined by detecting a direction and rate of change in a current amount of accumulated energy in the at least one stabilizing unit, wherein the rate of change is a speed of change of the energy balance, measured as accumulated energy in the stabilizing unit,wherein the apparatus is adapted to repeatedly detect the direction and speed of change in the current amount of accumulated energy in the at least one stabilizing unit, intermittently at certain intervals during ongoing energy transfer executed on a continuous basis during the transmission of wireless energy, and wherein the feedback control information is further related to the direction and speed of change in the current amount of accumulated energy in the at least one energy stabilizing unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification