Minute ventilation sensor with automatic high pass filter adjustment
US6868346B2 · kind B2 · utility
64Cited by
15References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 27, 2002 |
| Grant date | Mar 15, 2005 |
| Priority date | — |
| Expiry date | Dec 4, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/36521
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A minute ventilation sensing device in which transthoracic impedance is measured to generate an impedance signal from which a ventilation signal is derived, where the ventilation signal is proportional to minute ventilation. An adaptive high pass filter is used to filter the impedance signal into a ventilation band. The pole frequency of the high pass filter is adjusted in accordance with changes in a calculated signal variation parameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.