Method for determining the resistance of the respiratory system of a patient
US8160817B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2008 |
| Grant date | Apr 17, 2012 |
| Priority date | — |
| Expiry date | Feb 16, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2230/46
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for automatically determining the resistance of the respiratory system of a spontaneously breathing intubated patient. The method includes measuring flow (V′) and airway pressure (Paw)) as a function of time; determining the airway pressure at the end of the occlusion period as end of occlusion airway pressure Paw(tc)=Poccl; analyzing a time 5 dependence of the flow starting at the end of the occlusion period to determine a transition time td at which the slope of the flow changes from a first high value to a second lower value; determining the flow at the transition time as transition time flow V′(td)=V′peak and determining the airway pressure at the transition time as transition time pressure Paw(td); and calculating the resistance on the basis of the ratio of an estimated driving pressure at the transition time Pdrv(td) and the transition time flow V′peak.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.