Single patient use disposable carbon dioxide absorber
US5360002A · kind A · utility
Inventor
Key dates
| Filing date | Oct 28, 1991 |
| Grant date | Nov 1, 1994 |
| Priority date | — |
| Expiry date | Oct 28, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02C20/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to a disposable single patient use device for conditioning air administered to a patient under anesthesia. The apparatus includes an air impervious independently supported container located in immediate proximity to the patient with an inlet and an outlet opening and a mass of granular carbon dioxide absorption material disposed within the container in flow communication with the inlet and outlet openings. The exhalent breath of the patient, laden with carbon dioxide, enters the container and contacts the carbon dioxide absorption material whereupon the carbon dioxide is absorbed with the resultant instantaneous generation of heat and water vapor. The size of the container and the amount of carbon dioxide absorption material is selected such that the normal breathing of the patient causes air to be warmed, humidified, freed of carbon dioxide and recirculated to the patient upon the second and subsequent breaths. The size of the container, the amount of carbon dioxide absorbing material and the location of the container in immediate proximity to the patient also combine to provide a self-regulating feature to the system such that air, at an acceptable humidity …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.