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Platelet collection system

  • US 4,800,022 A
  • Filed: 11/04/1986
  • Issued: 01/24/1989
  • Est. Priority Date: 03/13/1985
  • Status: Expired due to Term
First Claim
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1. An apparatus for selectively separating platelets from whole blood comprising:

  • a receptacle means defining a receptacle for receiving said whole blood, said receptacle means being formed including at least a first porous membrane having a blood contacting surface and an opposite outer surface, said porous membrane having a porosity sufficiently small enough to inhibit the passage of said platelets;

    a first valve means for selectively directing said whole blood into said rectacle;

    a pressure regulating means selectively operable for establishing a pressure differential across said porous membrane sufficient enough to draw substantially only water through said porous membrane and for terminating said pressure differential, whereby said platelets become concentrated in a boundary layer formed adjacent said porous membrane blood contacting surface when said pressure differential is established and can be flushed free upon termination of said pressure differ.

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