Electric- or magnetic-field based detection of when electrode pads have been handled or removed from their package
US8463405B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 2004 |
| Grant date | Jun 11, 2013 |
| Priority date | — |
| Expiry date | Oct 10, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N2001/37294
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Handling or removal of a pair of defibrillator electrode pads from their package is detected in order to effectively time the issuance of prompts to guide the user. One plate of a capacitor is embedded in the package, the electrode pads and lead wires serving as the other plate. Impedance across the capacitor in an alternating current circuit is monitored to detect an increase in the distance between the pads and the package. The impedance level is determined, in a low-cost hardware solution, by rectifying and then integrating an output voltage of the capacitor to produce a voltage signal whose magnitude attenuates as the pads are handled or removed. In one embodiment, the above methodology is time-division multiplexed with an alternative process that identifies handling or removal based on pad-to-pad impedance. In a further embodiment, the capacitive configuration is replaced with an inductive one.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.