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Catheter assembly for intermittent intravenous use

  • US 4,245,635 A
  • Filed: 01/29/1979
  • Issued: 01/20/1981
  • Est. Priority Date: 01/29/1979
  • Status: Expired due to Term
First Claim
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1. An intravenous catheter assembly comprising:

  • a catheter comprised of an elongated, hollow tube and a hub connected at one end of said tube, the other end of said tube being an open end,said hub having an interior cavity communicating with the lumen of said tube;

    a fixed insert located substantially transversely across said cavity and having an aperture therethrough generally parallel to said catheter tube the periphery of said aperture forming a valve seat;

    a needle slideably positioned in said aperture and the lumen of said tube, the distal, pointed end of the needle adapted to protrude slightly beyond the distal end of said catheter tube, the proximal end of said needle extending beyond the open end of said hub;

    valve seat closure means in said cavity and operatively associated with said valve seat and disposed between said insert and the entrance to said lumen;

    valve seat opening means connected to said valve seat closure means and extending through said aperture to the opposite side of said insert;

    said needle displacing said valve seat closure means from said seat while said needle is positioned in said catheter;

    said valve seat closure means adapted to close said aperture to prevent backflow from said lumen after said needle is withdrawn;

    said valve seat opening means adapted to displace said valve seat closure means from said seat and provide access for the deposit of fluids into said lumen for delivery to the patient; and

    ,said valve seat closure means and said valve seat opening means cooperatively preventing the ready reinsertion of an instrument into said lumen after said needle has been withdrawn.

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