Method and device for monitoring the condition of a filter in a ventilator
US6035851A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1997 |
| Grant date | Mar 14, 2000 |
| Priority date | — |
| Expiry date | Sep 30, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/707
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method and device for monitoring the condition of at least one filter arranged in a flow path of a ventilator. Flow measurement signals are obtained from a first flow meter and a second flow meter and pressure signals are obtained from a first pressure meter and a second pressure meter. When a filter in the inspiratory section of the ventilator is to be tested, flow through the filter and the drop in pressure across the filter are determined from the pressure measured by the first pressure meter and the second pressure meter. If the drop in pressure in relation to the flow lies within predefined limits, the filter is deemed to be serviceable. In a corresponding manner, another filter in the expiratory line can be tested, wherein flow through the filter is determined by the second flow meter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.