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Active blood filter and method for active blood filtration

  • US 5,989,438 A
  • Filed: 12/12/1997
  • Issued: 11/23/1999
  • Est. Priority Date: 12/12/1997
  • Status: Expired due to Fees
First Claim
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1. A blood filter for removing unwanted particles from blood, comprising:

  • a housing having a blood inlet area for receiving blood to be filtered, a blood outlet area, and a blood return area for returning blood having unwanted particles to a reservoir;

    a plurality of separate blood paths extending from the inlet area to the outlet area of the housing for flowing the blood therethrough, wherein each of the blood paths includes;

    a detector adjacent to the blood path for detecting unwanted particles in the blood flowing through the blood path;

    a valve in operable relationship with the blood path for closing the blood path when an unwanted particle is detected by the detectors; and

    a circuit for limiting the number of the valves that close to ensure an adequate blood flow from the intlet to the outlet of the filter.

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