Apparatus and method for the autotransfusion of blood
US4935002A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 29, 1988 |
| Grant date | Jun 19, 1990 |
| Priority date | — |
| Expiry date | Jun 29, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2321/2058
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Autotransfusion apparatus and methods are disclosed for collecting, processing and returning blood to a patient during or after surgery. The processing step of the autotransfusion system comprises sequential rough filtering and filtering of the blood. Filtering is achieved within a single filter housing which includes a first ultrafiltration zone where blood fluids and anticoagulant are separated and removed from red blood cells, a washing zone where washing solution is injected into the remaining concentrated red blood cell solution and a second filtration zone where washing solution, residual blood fluids and anticoagulant are separated and removed from the washed and concentrated red blood cell solution. The filtration includes a rotating disc which creates a shear force upon the blood to prevent clotting and red blood cell build up along the face of filter membranes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.