Method and apparatus for unifying the ventilation/perfusion and pressure/flow models
US5606976A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 1994 |
| Grant date | Mar 4, 1997 |
| Priority date | — |
| Expiry date | Jul 26, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG16H20/40
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method and apparatus for unifying the pressure/flow and ventilation perfusion ratios is disclosed. The method comprises the following steps: determining the initial health condition of a patient so as to define a pulmonary pressure flow curve for each of a plurality of lung compartments of said patient; applying a stimulus of hypoxic pulmonary vasoconstriction to the pressure flow curve for each compartment to obtain a pressure flow curve for each of said plurality of compartments; and deriving a pulmonary artery pressure value corresponding to a ventilation/perfusion ratio that satisfies both the individual and total pressure flow requirements for said pulmonary pressure/flow curves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.