Medical system comprising implants
First Claim
1. A medical system comprising internal parts for implantation in a patient and external parts for use externally to the patient,the external parts comprising an energy source equipped with a primary coil for inductively transmitting energy to implantable parts and an external control unit for the control of the energy source,the internal parts comprising an electrically powered medical device, an energy receiver equipped with a secondary coil for inductively receiving energy for the medical device from the external energy source and an internal control unit for the control of the internal parts,the internal control unit is arranged to wirelessly transmit feedback information to the external control unit, said feedback information comprising information based on or relating to a first, a second parameter and a third parameter, with the first parameter being based on an energy balance between the amount of energy received in the energy receiver and the amount of energy used by the medical device over a certain amount of time and the second parameter being based on information relating to a coupling factor between the primary and the secondary coils, wherein the coupling factor compares the transmitted amount of energy in the primary coil with the received amount of energy in the secondary coil, and the third parameter being based on at least one of;
- a) in which the medical device also comprises a current regulator arranged to keep a current constant, the internal control unit being arranged to determine a difference between an input current to the current regulator and the current which the current regulator is arranged to keep constant, in which system said third parameter comprising or being based on said difference,b) in which the system also comprises a voltage regulator arranged to keep a voltage constant, the internal control unit being arranged to determine a difference between an input voltage to the voltage regulator and the voltage which the voltage regulator is arranged to keep constant, in which system said third parameter comprising or being based on said difference, and whereinthe system being adapted to take into account at least both the first, second and third parameters to determine the amount of energy inductively transmitted from the primary coil to avoid heat generation within the internal parts due to excess energy.
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Accused Products
Abstract
A medical system (100, 300) comprises internal parts (30, 32) for implantation in a patient and external parts (10, 12, 20). The external parts comprise an energy source (10) with a primary coil (12) and the internal parts comprise an electrically powered medical device (40, 41) and an energy receiver (30) with a secondary coil (32) for inductively receiving energy from the external energy source (10). The system (100, 300) is arranged to determine a balance between the energy received in the energy receiver (30) and the amount of energy used by the medical device (40, 41). The internal control unit (50) transmits feedback information to the external control unit (20), and the system (100, 300) is arranged to determine the feedback information based on a first (P1) and a second (P2) parameter.
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Citations
22 Claims
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1. A medical system comprising internal parts for implantation in a patient and external parts for use externally to the patient,
the external parts comprising an energy source equipped with a primary coil for inductively transmitting energy to implantable parts and an external control unit for the control of the energy source, the internal parts comprising an electrically powered medical device, an energy receiver equipped with a secondary coil for inductively receiving energy for the medical device from the external energy source and an internal control unit for the control of the internal parts, the internal control unit is arranged to wirelessly transmit feedback information to the external control unit, said feedback information comprising information based on or relating to a first, a second parameter and a third parameter, with the first parameter being based on an energy balance between the amount of energy received in the energy receiver and the amount of energy used by the medical device over a certain amount of time and the second parameter being based on information relating to a coupling factor between the primary and the secondary coils, wherein the coupling factor compares the transmitted amount of energy in the primary coil with the received amount of energy in the secondary coil, and the third parameter being based on at least one of; -
a) in which the medical device also comprises a current regulator arranged to keep a current constant, the internal control unit being arranged to determine a difference between an input current to the current regulator and the current which the current regulator is arranged to keep constant, in which system said third parameter comprising or being based on said difference, b) in which the system also comprises a voltage regulator arranged to keep a voltage constant, the internal control unit being arranged to determine a difference between an input voltage to the voltage regulator and the voltage which the voltage regulator is arranged to keep constant, in which system said third parameter comprising or being based on said difference, and wherein the system being adapted to take into account at least both the first, second and third parameters to determine the amount of energy inductively transmitted from the primary coil to avoid heat generation within the internal parts due to excess energy. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method for use with a medical system, which comprises internal parts for implantation in a patient and external parts for use externally to the patient, the external parts comprising:
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an energy source equipped with a primary coil for inductively transmitting energy to implantable parts, a control unit for the control of the energy source, the internal parts comprising; an electrically powered medical device, an energy receiver equipped with a secondary coil for inductively receiving energy for the medical device from the external energy source, and a control unit for the control of the internal parts, the method comprising the step of determining a balance between the amount of energy received in the energy receiver and the amount of energy used by the medical device, and the step of letting the internal control unit wirelessly transmit feedback information to the external control unit, the method being characterized in that it comprises the step of determining the feedback information based on or relating to a first and a second and a third parameter, and the step of letting the first parameter be based on the energy balance over a certain amount of time and letting the second parameter be based on information relating to a coupling factor between the primary and the secondary coils, and letting the third parameter be based on at least one of the following; a) further comprising the step of determining a difference between an input voltage to a voltage regulator which is comprised in the medical device in order to keep a voltage constant, and a voltage which the voltage regulator is arranged to keep constant, the method also comprising the step of using the third parameter, said third parameter comprising or being based on said voltage difference, the method also comprising the step of taking into account the third parameter in order to determine the amount of energy which should transmitted by the external energy source, and b) further comprising the step of determining a difference between an input current to a current regulator which is comprised in the medical device in order to keep a current constant, and a current which the current regulator is arranged to keep constant, the method also comprising the step of using the third parameter, said third parameter comprising or being based on said current difference, the method also comprising the step of taking into account the third parameter in order to determine the amount of energy which should transmitted by the external energy source, the method also comprising the step of using at least both the first and second and third parameters to determine the amount of energy which should be transmitted by the energy source, thus allowing for a rapid adjustment of the energy balance.
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Specification