Rate-responsive pacemaker with noise-rejecting minute volume determination
US5817135A · kind A · utility
49Cited by
9References
9Claims
0Family size
Assignee
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Key dates
| Filing date | May 2, 1997 |
| Grant date | Oct 6, 1998 |
| Priority date | — |
| Expiry date | May 2, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/3704
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A rate responsive implantable pacemaker generates a metabolic demand parameter such as a thoracic impedance which is converted into a corresponding metabolic indicated parameter. During the conversion, intermediate parameters, such as either tidal volume and respiration rate, or a derivative of the metabolic demand parameter are used by a cross-check circuit to insure that artefacts due for example to stroke volume noise are eliminated. The peak limiter is used to limit the metabolic indicated rate to an acceptable range. Both protection circuits use fuzzy logic components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.