Thoracic or intracardiac impedance detection with automatic vector selection
US7630763B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2005 |
| Grant date | Dec 8, 2009 |
| Priority date | — |
| Expiry date | May 22, 2027 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/3686
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
This document discusses, among other things, a cardiac function management device or other implantable medical device that includes a test mode and a diagnostic mode. During a test mode, the device cycles through various electrode configurations for collecting thoracic impedance data. At least one figure of merit is calculated from the impedance data for each such electrode configuration. In one example, only non-arrhythmic beats are used for computing the figure of merit. A particular electrode configuration is automatically selected using the figure of merit. During a diagnostic mode, the device collects impedance data using the selected electrode configuration. In one example, the figure of merit includes a ratio of a cardiac stroke amplitude and a respiration amplitude. Other examples of the figure of merit are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.