Peak expiratory flow rate measurement apparatus
US9700235B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2012 |
| Grant date | Jul 11, 2017 |
| Priority date | — |
| Expiry date | Apr 21, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/0871
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A peak expiratory flow rate measuring apparatus (PFM) having at least one measurement channel and at least one bypass flow channel including at least one entrance, at least one exit, at least an inner wall and an outer wall, and wherein at least a portion of said at least one bypass flow channel has a variable cross-sectional area, is provided herein. Further disclosed is a PFM having at least one measurement channel comprising at least one first flow entrance, at least one bypass flow channel comprising at least one second flow entrance, and at least one guide wall, having an axially forward portion adjacent to the second flow entrance and an axially aft portion adjacent to the first flow entrance is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.