Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
October 7, 2008
Patent Application Number
10532790
Date Filed
October 28, 2003
Patent Primary Examiner
Patent abstract
A motion sensor, and an implantable cardiac stimulator incorporating such a motion sensor, has a fluid-type housing containing a fluid that includes at least one type of anisotropic molecules, the anisotropic molecules exhibiting an anisotropic property having a state that changes dependent on motion. The housing of the motion sensor is located externally on an animate subject, or is implanted in the animate subject, and includes externally accessible electrodes that detect a change in the state of the anisotropic property and emit an output signal representative of an activity level of the subject.
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