Patent ID: 8630714
Filing Date: 2014-01-14
Classification: A61N

Abstract:
1. A bone growth stimulator system configured to stimulate bone growth in a body, the bone growth stimulator system comprising: a bone growth stimulator having circuitry that generates a signal, wherein the bone growth stimulator adjusts a voltage of the signal to account for changes in an impedance of the body such that a substantially constant current is delivered while the bone growth stimulator: a filter that filters the signal to produce a sinusoidal signal having a particular frequency, wherein other frequencies in the signal are substantially filtered, wherein an amplitude of the sinusoidal signal is controlled with a control voltage, the circuitry adjusting the voltage of the generated signal to control the amplitude of the sinusoidal signal to maintain the substantially constant current as the impedance of the body changes, wherein the sinusoidal signal is configured to stimulate bone growth; wherein the circuitry senses a current delivered through the body and adjusts the voltage of the generated signal by comparing a sensed voltage generated from the sensed current with a reference voltage to produce the control voltage, wherein the control voltage is used by the circuitry to adjust the voltage in order to maintain the substantially constant current; a push-to-test button that indicates that the substantially constant current is compliant, wherein the substantially constant current is compliant when the substantially constant current is greater than about 5.0 mA RMS and less than 10.6 mA RMS; and electrodes electrically connected to the bone growth stimulator and configured to capacitively couple with each other through a body, wherein only the sinusoidal signal is delivered to the body through the electrodes, wherein the circuitry adjusts the voltage to control the amplitude of the sinusoidal signal to account for the changes in the impedance of the body, wherein the circuitry includes a processor and is further configured as a compliance monitor to record a number of compliant treatments, a length of each compliant treatment, and whether the substantially constant current is compliant.