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Method and system for controlling supply of energy to an implantable medical device

  • US 9,452,296 B2
  • Filed: 10/10/2008
  • Issued: 09/27/2016
  • Est. Priority Date: 10/16/2007
  • Status: Active Grant
First Claim
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1. A method of supplying energy to an electrically operable medical device implanted in a patient, Wherein wireless energy is transferred from an external energy source located outside the patient to an internal energy receiver located inside the patient, said internal energy receiver being connected to said medical device for directly or indirectly supplying received energy thereto, the method comprising the following steps:

  • determining an amount of energy currently required for the operation of said medical device,transmitting, to said external energy source, a control siwlal from said medical. device or internal energy receiver reflecting said required amount of energy,transferring inductively from a primary coil in said external energy source to a secondary coil in said internal energy receiver,controlling the amount of transferred energy using an external control unit to in response to said control signal accurately controlling the amount of transferred energy to the implanted medical device, by adjusting the energy transfer efficiency from said external energy source to said internal energy receiver, where the correct amount of energy is always supplied to the medical device for proper operation thereof,repeatedly adjusting the energy transfer efficiency by adjusting the position of said primary coil relative to said secondary coil, anddisplacing the primary coil in at least one of a plurality of different directions relative to said secondary coil,using a coil displacement unit configured to displace the primary coil in the plurality of different directions.

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