| 摘要 |
A combined cardiotomy and venous blood reservoir (10) according to a preferr ed embodiment of the invention provides a separate in-flow path for both cardiotomy fluid and for venous blood, and includes a cardiotomy fluid filte r element (66) also serving as an initial de-foamer. The cardiotomy fluid is d e- foamed, filtered, and again de-foamed. The venous blood is de-foamed, and th en both fluids are combined for flow from the reservoir (10). The filter area (152') provided for cardiotomy fluid is advantageously separated from the ar ea of a final de-foamer element (152''). Thus, both the cardiotomy fluid and venous blood may flow through this final de-foamer element (152'') simultaneously along separate flow paths. The reservoir (10) design provides greater freedom in selecting adequate filter area (152') for the cardiotomy fluid, while allowing the selection of effective de-foamer element (152'') area in order to achieve acceptable flow rates for both cardiotomy fluid and for venous blood under various conditions of operation for the reservoir (10 ). An advantageous ratio of filter (152') and de-foamer element (152'') areas t o the volume of the reservoir (10) results, with the reservoir (10) requiring only an essential volume of fluid for processing. Also venous blood and cardiotomy fluid flowinlets (32, 34) to the apparatus may be rotatable in plan view independently both of one another and of a housing (12) of the reservoir (10). |
