Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Mechanical measurement system
Reexamination Certificate
2005-03-15
2005-03-15
Nghiem, Michael (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Mechanical measurement system
Reexamination Certificate
active
06868346
ABSTRACT:
A minute ventilation sensing device in which transthoracic impedance is measured to generate an impedance signal from which a ventilation signal is derived, where the ventilation signal is proportional to minute ventilation. An adaptive high pass filter is used to filter the impedance signal into a ventilation band. The pole frequency of the high pass filter is adjusted in accordance with changes in a calculated signal variation parameter.
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Daum Douglas R.
Larson Dennis E.
Cardiac Pacemakers Inc.
Nghiem Michael
Schwegman Lundberg Woessner & Kluth P.A.
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