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Blood donation unit

  • US 4,425,114 A
  • Filed: 04/23/1981
  • Issued: 01/10/1984
  • Est. Priority Date: 04/23/1981
  • Status: Expired due to Fees
First Claim
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1. A blood collection apparatus comprising:

  • (a) a first flexible bag for receiving a first fluid which is a mixture of a second and third fluid;

    (b) a second flexible bag containing said second fluid to be mixed with said third fluid in accordance with a predetermined ratio;

    (c) a rigid member interposed between said first and second bags;

    (d) an airtight chamber enclosing said bags and member;

    (e) conduit means for coupling said first and second bags to respective first and second ports of a three-port junction, the third port of said junction being coupled to the proximal end of a phlebotomy needle;

    (f) pump means for causing a pressure differential between said first bag and the distal end of said phlebotomy needle whereby when the distal end of said phlebotomy needle is coupled to a source of third fluid, said first bag is caused to begin to fill with fluid and displace the rigid member which causes the second fluid in the second bag to begin emptying and flowing to said junction where it mixes with the third fluid and passes to the first bag.

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