Flowmeters
US5634471A · kind A · utility
121Cited by
10References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 9, 1995 |
| Grant date | Jun 3, 1997 |
| Priority date | — |
| Expiry date | Feb 9, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/0871
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Peak expiratory flow meter for measuring the expiratory flow rate of a subject having a flow inhibitory device normally effective to inhibit expiratory flow through the peak expiratory flow meter, the flow inhibitory device being operable in response to attainment of a predetermined expiratory pressure to allow the expiratory flow. From the PEF measured, the airway passage resistance can be determined. Further lung characteristics can be determined from the shape of the decay portion or the expiratory flow curve. The meter has clinical application in the monitoring and diagnosis of asthma and other pulmonary diseases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.