Method and apparatus for reducing noise and detecting electrode faults in medical equipment
US6974420B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2002 |
| Grant date | Dec 13, 2005 |
| Priority date | — |
| Expiry date | Jan 23, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/28
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method and apparatus for reducing noise and detecting electrode faults in a physiological activity acquisition system. The method includes the act of delivering a carrier signal through an electrode connected to a subject. Once the carrier signal is delivered, a combined signal having an electrical-activity portion and a carrier-signal portion is sensed by at least one signal sensing electrode attached to the subject. A low-pass, finite impulse response filter, having a first zero point frequency substantially the same as the carrier signal, separates the carrier signal portion from the electrical activity portion. An impedance value for the sensing electrode is calculated using the carrier signal portion. The calculated impedance value is compared against a known value to determine whether an electrode fault exists.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.