Circuit and method for analyzing a patient's heart function using overlapping analysis windows
US7463922B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 2000 |
| Grant date | Dec 9, 2008 |
| Priority date | — |
| Expiry date | Mar 18, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/3904
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A circuit includes a sensor coupled to a processor. The sensor senses an electrical signal that is representative of a patient parameter, and the processor determines a condition of the patient by analyzing first and second overlapping portions of the sensed electrical signal. For example, a portable AED can include such a circuit to sense first and second overlapping sections of an ECG. By utilizing this overlapping-window technique, the AED can obtain and analyze multiple sections of ECG data, and thus can make a shock/no-shock decision, more quickly than an AED using contiguous-window analysis. Thus, the overlapping-window technique allows one to use both longer ECG sections (better accuracy per window) and more of these longer sections (better voting accuracy) over a given analysis time. Furthermore, this overlapping-window technique significantly reduces or eliminates boundary problems because the boundary of one ECG section is within the interior of either the preceding or the following overlapping ECG section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.