Apparatus for creating therapeutic charge transfer in tissue
OwnerMichael Spiegelinventor
Life of this patent
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Abstract
An apparatus for creating therapeutic charge transfer in tissue includes a coil. The coil generates a changing magnetic field to induct an electric field in the tissue exceeding 10 mV/cm when the coil is 5 cm from the tissue. Preferably, the magnetic field has a growth phase and a decay phase and a duration of the growth phase is at least ten times a duration of the decay phase. The apparatus can include a control circuit to control a current fed to the coil. The control circuit includes two subcircuits and a switch for switching between a first of the subcircuits and a second of the subcircuits; preferably, a λ of the second subcircuit is at least ten times a λ of the first subcircuit. To generate the therapeutic effect, the coil should have a duty cycle of at least ten percent.
Claims26
An apparatus for creating therapeutic charge transfer in tissue, comprising:
- a coil generating a changing magnetic field to induct an electric field in the tissue exceeding 10 mV/cm when said coil is 5 cm from the tissue, said magnetic field having a growth phase and a decay phase, a duration of the growth phase being at least ten times a duration of the decay phase;
- and
- a control circuit controlling a current fed to said coil, said control circuit including two subcircuits and a switch for switching between a first of said subcircuits and a second of said subcircuits, said first of said subcircuits causing said growth phase, said second of said subcircuits causing said decay phase;
- each one of said subcircuits having a respective time constant (λ) equaling an inductance (L) divided by a resistance (R) of said respective one of said subcircuits;
- and
- said λ of said second subcircuit being at least ten times said λ of said first subcircuit.
An apparatus for creating therapeutic charge transfer in tissue, comprising:
- a coil generating a changing magnetic field to induct an electric field in the tissue exceeding 10 mV/cm when said coil is 5 cm from the tissue, said magnetic field having a growth phase and a decay phase, a duration of the growth phase being at least ten times a duration of the decay phase;
- and
- a control circuit controlling a current fed to said coil, said control circuit including two subcircuits and a switch for switching between a first of said subcircuits and a second of said subcircuits, said first of said subcircuits causing said growth phase, said second of said subcircuits causing said decay phase;
- said second subcircuit having a time constant (λ) no less than 10, λ being calculated by dividing a resistance (R) of said second subcircuit by an inductance (L) of said second subcircuit.
An apparatus for creating therapeutic charge transfer in tissue, comprising:
- a coil generating a changing magnetic field to induct an electric field in the tissue exceeding 10 mV/cm when said coil is 5 cm from the tissue, said magnetic field having a growth phase and a decay phase, a duration of the growth phase being at least ten times a duration of the decay phase;
- and
- a control circuit controlling a current fed to said coil, said control circuit including two subcircuits and a switch for switching between a first of said subcircuits and a second of said subcircuits, said first of said subcircuits causing said growth phase, said second of said subcircuits causing said decay phase;
- said second subcircuit including an Integrated Gate Bipolar Transistor (IGBT) for increasing a resistance of said second subcircuit.
An apparatus for creating therapeutic charge transfer in tissue, comprising a coil generating a changing magnetic field to induct an electric field in the tissue exceeding 10 mV/cm when said coil is 5 cm from the tissue, said coil having a duty cycle of at least ten percent.
A method for magnetically inducting an electrical field in tissue to create therapeutic charge transfer in the tissue, which comprises:
- providing an apparatus for creating therapeutic charge transfer in tissue, comprising a coil generating a changing magnetic field to induct an electric field in the tissue exceeding 10 mV/cm when said coil is 5 cm from the tissue;
- increasing the magnetic field in said coil linearly over time to induct an electrical field having a first direction in the tissue for a first period of time;
- and
- decreasing the magnetic field linearly over time to induct an electrical field having a second direction opposite said first direction in the tissue for a second period time, the second period of time being different than said first period of time.
A method for magnetically inducting an electrical field in tissue to create therapeutic charge transfer in the tissue, which comprises:
- providing an apparatus for creating therapeutic charge transfer in tissue, comprising a coil generating a changing magnetic field to induct an electric field in the tissue exceeding 10 mV/cm when said coil is 5 cm from the tissue;
- increasing the magnetic field in said coil steadily to induct an electrical field having a first direction in the tissue for a first period of time varying less than 10% in intensity for at least 90% of said first period of time;
- and
- decreasing the magnetic field to induct an electrical field having a second direction opposite said first direction in the tissue for a second period time, the second period of time being different than said first period of time.
A method for magnetically inducting an electrical field in tissue to create therapeutic charge transfer in the tissue, which comprises:
- providing an apparatus for creating therapeutic charge transfer in tissue, comprising a coil generating a changing magnetic field to induct an electric field in the tissue exceeding 10 mV/cm when said coil is 5 cm from the tissue;
- increasing the magnetic field in said coil to induct an electrical field having a first direction in the tissue for a first period of time;
- decreasing the magnetic field to induct an electrical field having a second direction opposite said first direction in the tissue for a second period time, the second period of time being different than said first period of time;
- repeating the increasing and the decreasing steps in alternating order;
- defining a duty cycle as said first time period divided by a sum of said first and second time period;
- and
- maintaining said duty cycle to at least sixty-three percent.
A method for magnetically inducting an electrical field in tissue to create therapeutic charge transfer in the tissue, which comprises:
- providing an apparatus for creating therapeutic charge transfer in tissue, comprising a coil generating a changing magnetic field to induct an electric field in the tissue exceeding 10 mV/cm when said coil is 5 cm from the tissue;
- increasing the magnetic field in said coil to induct an electrical field having a first direction in the tissue for a first period of time;
- and
- decreasing the magnetic field to induct an electrical field having a second direction opposite said first direction in the tissue for a second period time, the second period of time being different than said first period of time;
- creating said magnetic field in a coil;
- connecting said coil to an increase subcircuit that feeds current to said coil during the increasing step;
- and
- connecting said coil to a decrease subcircuit that robs current from said coil during the decreasing step.
Dependencies are inferred from the claim text.