Apheresis apparatus for separating an intermediate density component from whole blood
US5607579A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1995 |
| Grant date | Mar 4, 1997 |
| Priority date | — |
| Expiry date | Sep 28, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB04B2005/0471
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apheresis apparatus for increasing the purity and yield of platelets separated from donated whole blood by centrifugation incorporates a centrifuge for separating whole blood into lower, intermediate, and higher density components. The centrifuge has inlet and outlet ports in selective fluid communication with a container for receiving lower density blood component from the outlet port. A pump is coupled to the container and the inlet port for recirculating lower density blood component from the first container through the inlet port into the centrifuge at a first, substantially constant, rate so as to widen the region of the centrifuge occupied by the intermediate density component without causing the intermediate density component to exit the centrifuge, and subsequently at a second rate, so as to displace intermediate density component from the centrifuge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.