Adaptive cancellation of a signal component

Details Adaptive cancellation of a signal component Adaptive cancellation of a signal component

2011-08-02

2011-08-02

Mallari, Patricia (Department: 3735)

Surgery

Diagnostic testing

Cardiovascular

C600S508000, C600S547000

Reexamination Certificate

active

07988634

ABSTRACT:
A cardiac-related signal such as a cardiogenic impedance signal is derived to obtain cardiac information such as stroke volume information that may be used to evaluate cardiac performance and/or other medical conditions. In some aspects detection of the cardiogenic impedance signal involves adaptively cancelling an unwanted component of a sensed signal. For example, in some embodiments a sensed respiratory signal may be subtracted from a thoracic impedance signal to reduce a respiratory component of the thoracic impedance signal. In this way, a more accurate cardiogenic impedance signal may be derived from the resulting signal.

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