Patent ID: 6198972
Filing Date: 2001-03-06
Classification: A61N

Abstract:
A method for limiting unwanted current, induced when the level of an external signal is greater than an external signal threshold level, in a conductive loop formed by a medical device implanted within a living organism having electrically excitable tissue, the method including the steps of:A. closing said conductive loop when said medical device is stimulating said electrically excitable tissue for achieving a therapeutic effect if the level of said external signal is less than said external signal threshold level; andB. opening said conductive loop by generating and maintaining a high impedance within said conductive loop whenever the level of said external signal is greater than said external signal threshold level,wherein said living organism manually initiates said opening of said conductive loop when said living organism is about to enter an area where the level of said external signal is greater than said external signal threshold level.