Method and apparatus for preparing a substitution liquid
US5178763A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 10, 1991 |
| Grant date | Jan 12, 1993 |
| Priority date | — |
| Expiry date | Apr 10, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M1/3465
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention is directed to an apparatus and method for transforming a sterile pyrogen-free liquid into a substitution liquid using an exchanger. The method includes the steps of flowing first and second liquids over opposite sides of a semipermeable membrane, the first liquid being sterile and pyrogen-free. Both liquids contain at least some electrolytes of blood including at least a buffer agent or a precursor of a buffer agent. At least some of the electrolytes have different concentrations in the two liquids. When purifying blood by hemodiafiltration, this method has the particular advantage that, rather than discarding the second liquid, it can be used for hemodiafiltration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.