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Protective intraluminal sheath

  • US 5,647,857 A
  • Filed: 03/16/1995
  • Issued: 07/15/1997
  • Est. Priority Date: 03/16/1995
  • Status: Expired due to Term
First Claim
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1. A retractable sheath for use with a catheter for delivering treatment to a body lumen of a patient, said sheath comprising:

  • a tubular sheath body for covering a treatment-delivering portion of the catheter and having an inner surface, an outer surface, a proximal end and a distal end;

    a collar radially disposed about and attached to said proximal end of said sheath body;

    a strand including a peelable portion having a first end and a free portion having a free end;

    said peelable portion being embedded in said inner surface of said sheath body and extending axially from said collar to said distal end of said sheath body, said first end of said peelable portion being affixed to said collar and said free portion of said strand extending out of said distal end of said sheath body and resting alongside said outer surface of said sheath body further extending back towards said proximal end of said sheath body;

    whereby the proximal application of a tearing force to said free end of said free portion of said strand causes said peelable portion to cut through said sheath body up to said collar, said collar being resistant to the tearing force applied.

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