Method and apparatus for harvesting blood components
US5874208A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 22, 1997 |
| Grant date | Feb 23, 1999 |
| Priority date | — |
| Expiry date | Sep 22, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M1/025
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A method and an extractor for pressing out plasma and buffy coat from a collapsible blood container (1), in which blood has been divided, by centrifugation, into a plasma layer, a buffy coat layer and a layer of red blood cells. The plasma and then the buffy coat are pressed out each through a separate outlet tube (2) or through a common outlet tube (2), which is connected to the top portion of the blood container, a pulsating pressure being applied to a top section of the blood container (1) during the end phase of the pressing-out of buffy coat. The extractor has a stationary support surface (6) and a movable pressing member (7), between which the blood container is suspended and subjected to a compressive force in order to press out the plasma and then the buffy coat through the outlet tube (2). The extractor has one or more inflatable cushions (12, 13) arranged on the support surface (6) or the pressing member (7) or both on the same level as the top section of the blood container (1), and a device (15, 16) for pulsating the pressure in said cushions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.