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Portable apparatus for taking blood samples

  • US 4,696,309 A
  • Filed: 12/11/1984
  • Issued: 09/29/1987
  • Est. Priority Date: 04/12/1983
  • Status: Expired due to Fees
First Claim
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1. Portable extraction apparatus of a size to be worn on the body for sequentially taking samples of blood and other body fluids comprising a housing containing:

  • pump means having an outlet and an inlet, and first conduit means for connecting said inlet of said pump means to a catheter,multiple storage means providing a plurality of chambers for separately storing a plurality of samples of body fluid,fluid discharge means comprising a common discharge passage for discharging fluid not to be stored,first valve means having an outlet connectable alternatively to said storage means and said fluid discharge means and an inlet,second conduit means connecting the outlet of said pump with the inlet of said first valve means,a check valve in said second conduit means downstream of said pump to restrict flow of fluid in said second conduit means to flow in a direction from said pump to said first valve means,fluid reservoir means for storing a supply of rinsing fluid,third conduit means connecting said rinsing fluid reservoir means to a junction with said second conduit means at a location between said pump and said check valve,second valve means in said third conduit means for opening and closing said third conduit means, and,central control means for controlling said pump, said first valve means and said second valve means in accordance with the following program to;

    (a) operate said pump with said second valve means closed and said first valve means connecting the outlet thereof with said fluid discharge means to pump rinsing fluid and an initial portion of body fluid from said catheter to said fluid discharge means,

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