Surgery – Truss – Pad
Patent
1990-04-26
1991-05-14
Jaworski, Francis
Surgery
Truss
Pad
A61N 100
Patent
active
050147005
ABSTRACT:
An implantable variable rate pacemaker adaptive to patient exercise detects movements of the patient, and discriminates between detected movements indicative of physical exercise by the patient and detected movements indicative of non-exercise. The pacemaker responds to the detected movements indicative of physical exercise by incrementally adjusting the pacing rate according to the level of the physical exercise. The detection of movement is performed by an accelerometer in the form of a mechanoelectrical transducer which converts mechanical movements to an electrical signal having a designated parameter representative of the intensity of the mechanical movements. The accelerometer is housed within and isolated from the pulse generator case of the pacemaker and is implemented as part of a semiconductor device. Discrimination between the detected movements indicative of physical exercise and of non-exercise is performed by an electrical circuit integral with the semiconductor device which processes the electrical signal generated by the transducer to selectively limit the designated parameter thereof to appreciable values in response to those mechanical movements in a preselected frequency range.
REFERENCES:
patent: 4428378 (1984-01-01), Anderson et al.
patent: 4771780 (1988-09-01), Sholder
patent: 4802481 (1989-02-01), Schroeppel
patent: 4907593 (1990-03-01), Rapach et al.
Intermedics Inc.
Jaworski Francis
Manuel George
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