METHOD AND APPARATUS FOR DYNAMIC ADJUSTMENT OF RECHARGE PARAMETERS
First Claim
1. A passive recharging system for an implantable medical device comprising:
- a) a secondary coil associated with the implantable medical device;
b) an external power source including;
a primary coil; and
a modulation circuit operatively coupled to said primary coil, said modulation circuit being capable of driving said primary coil at a carrier frequency when said primary coil is in proximity to said secondary coil and of varying the carrier frequency in response to sensor data received from the implantable medical device;
c) a first sensor associated with the implantable medical device and in communication with the modulation circuit, the first sensor being capable of sensing a first condition indicating a need to adjust the carrier frequency during a charging process;
d) a second sensor associated with the implantable medical device and in communication with the modulation circuit, the second sensor being capable of sensing a second condition which is affected by the carrier frequency.
1 Assignment
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Accused Products
Abstract
A recharging system and method for an implantable medical device includes: a secondary coil associated with the implantable medical device; an external power source including a primary coil and a modulation circuit operatively coupled to the primary coil, the modulation circuit being capable of driving the primary coil at a carrier frequency when the primary coil is in proximity to the secondary coil and of varying the carrier frequency in response to sensor data received from the implantable medical device; a first sensor associated with the implantable medical device and in communication with the modulation circuit, the first sensor capable of sensing a first condition indicating a need to adjust the carrier frequency during a charging process; and a second sensor associated with the implantable medical device and in communication with the modulation circuit, the second sensor capable of sensing a second condition which is affected by the carrier frequency.
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Citations
20 Claims
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1. A passive recharging system for an implantable medical device comprising:
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a) a secondary coil associated with the implantable medical device; b) an external power source including; a primary coil; and a modulation circuit operatively coupled to said primary coil, said modulation circuit being capable of driving said primary coil at a carrier frequency when said primary coil is in proximity to said secondary coil and of varying the carrier frequency in response to sensor data received from the implantable medical device; c) a first sensor associated with the implantable medical device and in communication with the modulation circuit, the first sensor being capable of sensing a first condition indicating a need to adjust the carrier frequency during a charging process; d) a second sensor associated with the implantable medical device and in communication with the modulation circuit, the second sensor being capable of sensing a second condition which is affected by the carrier frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for charging an implantable medical device comprising:
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initiating a charging process; during the charging process, monitoring a first condition of the implantable medical device; during the charging process, monitoring a second condition of the implantable medical device; and adjusting the carrier frequency if the first condition meets a first predetermined criterion and the second condition meets a second predetermined criterion. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for charging an implantable medical device comprising:
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initiating an inductive charging process in which energy is transferred from a primary coil in an external power source to a secondary coil in the implantable medical device; during the charging process, measuring a voltage across the secondary coil of the implantable medical device; during the charging process, measuring a temperature in the implantable medical device; comparing the measured voltage to a voltage threshold value; if the measured voltage is below the voltage threshold value, comparing the measured temperature to a temperature threshold value; and if the measured temperature is below the temperature threshold value, increasing the frequency at which the primary coil is driven.
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Specification