Device for warming and humidifying gases and more particularly respiratory gases during artificial respiration
US5109471A · kind A · utility
Inventor
Key dates
| Filing date | Jul 24, 1990 |
| Grant date | Apr 28, 1992 |
| Priority date | — |
| Expiry date | Jul 24, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M16/1045
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus for warming and humidifying respiratory gases during artificial respiration includes two passive heat and moisture exchangers and an active warming and humidifying element disposed between them in a housing. The first passive heat and moisture exchanger serves to preheat and prehumidify cold and dry gases to be inhaled. In a further, downstream, active heat and moisture exchanger and the second heat and moisture exchanger, gases are additionally heated and humidified, thus ensuring optimum physiological conditioning of the respiratory gases to a temperature of 36.degree.-37.degree. C. and 100% relative humidity. In an exhalation phase, 70 to 80% of humidity and heat are recovered from the optimally conditioned humid and warmed respiratory gas with the aid of the two integral passive heat and moisture exchangers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.