Sulzer Intermedics, Inc.

Matthew M Johnston

Don C Deno

Steven R Conger

Alex Zinner

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.

Electromagnetic acceleration transducer for implantable medical device

Magnetically alterable material, such as magnetostrictive material, is used in combination with a suitable substrate and a suitable magnetic field to produce a stylet and lead assembly that curves in response to a suitable magnetic field.

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Angleton, TX, United States of America

Matthew M Johnston