Method for determining respiratory function
US4802492A · kind A · utility
143Cited by
3References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 11, 1987 |
| Grant date | Feb 7, 1989 |
| Priority date | — |
| Expiry date | Mar 11, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/085
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for determining respiratory function in subjects, as well as the apparatus thus employed. The method involves blocking exhalation while the subject inhales spontaneously. Increased volume in the lungs and face mask pressure are measured to determine respiratory compliance. When the exhalation block or occlusion is removed, flow of exhaled air and volume changes in the lungs are measured to determine the time constant. The relationship between time constant and respiratory compliance permits determination of respiratory resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.