| 摘要 |
The invention pertains to a process and device for fluid separation of whole blood as a mixture of liquids into individual, differently-colored blood constituents, the blood being packed in flexible bags that are connected to one another by light-transparent tubes (6), and the blood components being forced to flow from one bag into another, particularly to separate concentrated thrombocytes from buffy coat using a photometer unit (10, 18) which is situated in the region of a tube, which contains a transmitter (10) and a receiver (18) for electromagnetic waves and past which flows the liquid in the tube. Serving as transmitter (10) of the photometer unit (10, 18) is a light-emitting diode, with radiation of a wavelength in the range of either about 535 nm to 575 nm (green to red), preferably 565 nm, or about 400 nm to 453 nm (blue), with the receiver (18) detecting changes in the color of the liquid and deriving therefrom a signal which is conveyed to a breaker unit (16) through which the connection between the bags passes and which stops the flow when a predetermined limit value is reached. |
