Impedance measurement and demodulation using implantable device
US9357944B2 · kind B2 · utility
2Cited by
18References
23Claims
0Family size
Assignee
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Key dates
| Filing date | Jan 8, 2009 |
| Grant date | Jun 7, 2016 |
| Priority date | — |
| Expiry date | Jul 19, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/3956
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An implantable medical device performs impedance measurement and demodulation, such as for obtaining lead impedance measurements, or thoracic impedance measurements, such as for extracting respiration, cardiac stroke, or fluid status information. A 4-point FIR filter demodulator can be used to demodulate a two-phase current excitation waveform. The demodulator can also be used to measure noise for triggering a noise response. Among other things, an increased excitation current level can be used when noise is deemed to be present.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.