Method and apparatus for plasmapheresis
US4990132A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 1988 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Nov 15, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2035/00495
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for plasmapheresis includes withdrawal of a quantity of blood from a blood donor to an annular primary container forming part of a closed flexible processing assembly positioned in a processing space provided in a centrifuge rotor and conformed to the processing assembly. During the withdrawal, the rotor is caused to perform an oscillating movement for agitating the blood whereupon the blood is centrifuged in the primary container to be separated into blood cells and plasma. While the centrifugation is going on, the primary container is compressed to expel the plasma fraction to a secondary container. Liquid diluent is then fed to the primary container to resuspend the blood cell fraction while agitation is again accomplished by oscillating the rotor, whereupon the blood cell fraction is returned to the blood donor. The apparatus is a closed flexible processing assembly for use in carrying out the method according to the invention and includes an annular primary container, a secondary container positioned in the central region of the annular primary container, a collapsible connecting duct connecting the portion of the primary container closest to the center of rotation wi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.