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Catheter arrangement with interlocking sequenced guarding members for protecting cannula

  • US 5,562,631 A
  • Filed: 06/07/1995
  • Issued: 10/08/1996
  • Est. Priority Date: 06/07/1995
  • Status: Expired due to Term
First Claim
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1. An arrangement for protecting a cannula of a catheter insertion device, comprising:

  • (a) a housing for receiving a cannular needle, said cannular needle extending from an end of said housing and being adapted to administer a catheter to a patient;

    (b) needle guarding means slidably mounted on said housing, said cannular needle extending through said needle guarding means in the operative position of said cannular needle, said needle guarding means comprising;

    (i) a back guarding member slidably mounted in said housing; and

    (ii) a forward guarding member slidably mounted in said back guarding member, said forward guarding member being retracted into said back guarding member and said back guarding member being retracted into said housing in the operative condition of said cannular needle, and said back guarding member and said forwarding guarding member being telescopically extendable relative to each other and said housing so as to form a protective containment for said cannular needle upon the withdrawal thereof from the body of the patient.

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