Implantable devices and methods using frequency-domain analysis of thoracic signal
US7186220B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 2003 |
| Grant date | Mar 6, 2007 |
| Priority date | — |
| Expiry date | Nov 18, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/36592
- WIPO fieldMedical technology
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.