Electromagnetic acceleration transducer for implantable medical

Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems

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Details

607119, 607122, 32420711, 32420715, A61B 505, A61B 502, A61N 105

Patent

active

059419040

ABSTRACT:
An electromagnetic accelerometer includes a rigid shell with a cavity in which two magnets are fixed at either and of the rigid shell and one magnet is allowed to move between the fixed magnets. The three magnets are arranged so that the movable magnet is suspended between the fixed magnets by magnetic forces from the fixed magnets. A coil of wire surrounds the shell and magnets. An acceleration of the accelerometer causes a displacement of the movable magnet with the cavity. As a result, an electrical current is induced in the coil of wire. The voltage in the coil of wire is proportional to the acceleration experienced by the accelerometer. The electromagnetic accelerometer is particular useful in an implantable pacemaker or defibrillator and can be included in either or both a lead or the housing of the pacemaker. Further, the accelerometer generates its own voltage in response to acceleration and the resulting electrical energy can be used as a power source.

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