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Single use system for preparation of autologous plasma

  • US 5,674,394 A
  • Filed: 03/24/1995
  • Issued: 10/07/1997
  • Est. Priority Date: 03/24/1995
  • Status: Expired due to Term
First Claim
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1. A single use system for obtaining autologous plasma comprising a plasma separator for separating plasma from whole blood, the plasma separator comprising:

  • a single use filter unit comprising a first inlet and a second inlet in fluid communication with each other, an outlet, and a filtration membrane separating the inlets from the outlet, the filtration membrane being selectively permeable to blood plasma;

    a manually operable, single use first pump comprising a first receiving chamber connected to the first inlet, the first receiving chamber being defined in part by a manually moveable first wall wherein movement of the first wall alters the volume of the first receiving chamber;

    a manually operable, single use second pump comprising a second receiving chamber connected to the second inlet, the second receiving chamber being defined in part by a manually moveable second wall wherein movement of the second wall alters the volume of the second receiving chamber; and

    a flow path along the membrane between the first and second pumps;

    whereby to repeatedly exchange whole blood between the first and second receiving chambers past the membrane, whereby to allow plasma to flow across the membrane and out of the outlet.

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