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Multiple sheath catheter using multiple stages and method of use

  • US 5,944,695 A
  • Filed: 09/30/1997
  • Issued: 08/31/1999
  • Est. Priority Date: 09/30/1997
  • Status: Expired due to Fees
First Claim
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1. A multiple sheath catheter comprising:

  • a first stage catheter comprising a distal end for introducing into a blood vessel, a proximal end, and an internal lumen between the distal and proximal ends;

    a needle comprising a sharp tip, the needle being disposed lengthwise within the lumen of the first stage catheter such that the sharp tip projects beyond the distal end of the first stage catheter;

    a second stage cannula comprising a lumen, wherein the first stage catheter is disposed lengthwise within the lumen of the second stage cannula; and

    gripping means for squeezing the first stage catheter such that the needle disposed within the lumen of the first stage catheter can be gripped by the first stage catheter wherein the gripping means comprises a wing set flexibly mounted to the first stage catheter, the wing set comprising two diametrically opposed wings, wherein the wing set is adapted to squeeze the first stage catheter by bringing the two diametrically opposed wings towards each other.

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