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System for continuous withdrawal of blood

  • US 4,006,743 A
  • Filed: 06/17/1975
  • Issued: 02/08/1977
  • Est. Priority Date: 01/15/1973
  • Status: Expired due to Term
First Claim
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1. A method for continuously withdrawing blood from a subject, comprising the steps of:

  • inserting a catheter having a nonthrohmbogenic passageway therethrough into a vein of a subject;

    causing blood to move continuously from the vein into and through the passageway;

    continuously collecting said blood withdrawn through the catheter; and

    controlling the continuous withdrawal of said blood slowly from said vein at a pre-determined constant rate and for a pre-determined extended time during which the catheter is in the vein of the subject.

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