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US 5,298,171 AGranted
Method and apparatus for separation of blood into its components
AssigneeFresenius AG
InventorWolfgang Biesel
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AssigneeFresenius AG
InventorWolfgang Biesel
Estimating the term…
In a separation device for separation of blood into its components, the hematocrit value of the blood to be separated plays a significant role relative to the sedimentation of cellular blood components. Since in blood processing, particularly in the intraoperative area, significant fluctuations of the incoming hematocrit value may occur, for example, due to infused volume expander, irrigation solutions, anticoagulant additives, etc., it is useful for maintenance of a blood separation working with constant values, particularly a constant hematocrit value of the erythrocyte fraction, to take the preset hematocrit value of the blood to be separated into account. According to the invention, the rate of blood flow through the separation device is automatically adjusted as a function of the hematocrit value of the incoming blood.
Apparatus for separation of blood into its components, comprising:
A process for maintaining a constant hematocrit value of the erythrocyte fraction of a blood separator, the separator having an intake line, discharge lines for outputting at least an erythrocyte fraction and a cell-poor plasma fraction and a return line for returning at least one component to a donor or patient, the process comprising the steps of:
Dependencies are inferred from the claim text.