Implantable devices and methods using frequency-domain...

Details Implantable devices and methods using frequency-domain... Implantable devices and methods using frequency-domain...

2007-03-06

2007-03-06

Pezzuto, Robert (Department: 3766)

Surgery

Diagnostic testing

Respiratory

C600S484000, C600S547000

Reexamination Certificate

active

10612387

ABSTRACT:
This document describes, among other things, systems, devices, and methods that use frequency domain analysis of a thoracic signal. One example uses frequency domain analysis for discriminating between different pulmonary physiological states. Examples of breathing states include normal breathing, periodic breathing, Cheyne-Stokes breathing, obstructed respiration, restrictive respiration, and pulmonary edema. The frequency domain analysis may also be used for performing heart rate variability (HRV) diagnostics. In one example, a frequency domain adaptive filter implements a variable cutoff frequency for separating heart contraction spectral content and other spectral content from lower frequency respiration spectral content and other lower frequency spectral content.

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