Bayonet lock cannula for pre-slit y-site

  • US 5,658,260 A
  • Filed: 07/29/1996
  • Issued: 08/19/1997
  • Est. Priority Date: 01/25/1988
  • Status: Expired due to Term
First Claim
Patent Images

1. A cannula insertion device for being inserted into a pre-slit injection site located in a Y-type site housing, said insertion device comprising:

  • a tube defining a fluid flow path therein, said tube having a distal end region terminating in a blunt piercing end for penetrating said injection site;

    said tube defining at least one aperture in said distal end region through which fluid can flow to or from said fluid flow path; and

    a protective shield at least partially surrounding and being spaced apart at a predetermined distance from said tube, having at least one arcuate wall longitudinally positioned about the distal region of the tube in spaced relation thereto, said arcuate wall defining an open side, and at least one arcuate arm extending from said arcuate wall across a portion of said open side, said arm extending generally circumferentially about the distal region, whereby said protective shield may be used to lockingly engage and disengage said cannula device with the injection site, the arcuate arm of the protective shield includes a bayonet barb and lock whereby the Y-type site housing is lockingly engaged and disengaged with the cannula device by the rotation of the injection site housing beyond the bayonet barb and into the bayonet lock.

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