Control of pressure for breathing comfort
US11052206B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2013 |
| Grant date | Jul 6, 2021 |
| Priority date | — |
| Expiry date | Jan 27, 2037 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2230/40
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A respiratory treatment apparatus generates an indication of inspiration or expiration based on a measure of motor current of a flow generator. In an example, first and second current signals are derived from the measurement. The first derived current signal may be a long term measure or average of current and the second derived current signal may be a short term measure or average of current. A processor (120) determines an indication of inspiration or expiration as a function of the first and second derived current signals. The function of the first derived current signal and the second derived current signal may be a comparison of the derived current signals. The derived signals may be determined by filtering. The indication of inspiration or expiration may serve as a trigger or cycle control for changing treatment pressure in synchrony with patient respiration without measured signals from pressure, flow or speed sensors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.