Method and apparatus for improved flow limitation detection of obstructive sleep apnea
US8607793B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2007 |
| Grant date | Dec 17, 2013 |
| Priority date | — |
| Expiry date | Jan 7, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2230/40
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
In a respiratory apparatus for treatment of sleep apnea and other disorders associated with an obstruction of a patient's airway and which uses an airflow signal, an obstruction index is generated which detects the flattening of the inspiratory portion of the airflow. The flattening index serves as an obstruction index used to differentiate normal and obstructed breathing. The obstruction index is based upon comparison of values of airflow in different sectors of the inspiratory peak of the wave function and is particularly suitable for distinguishing M shaped or square shaped respiratory patters indicative of partially obstructed airways.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.