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EXPANDABLE SHEATH

  • US 20160296730A1
  • Filed: 10/09/2015
  • Published: 10/13/2016
  • Est. Priority Date: 04/10/2015
  • Status: Active Grant
First Claim
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1. A sheath comprising:

  • an elastic outer tubular layer defining an initial elastic lumen extending axially therethrough, the initial elastic lumen having an initial diameter; and

    an inner tubular layer having a thick wall portion integrally connected to a thin wall portion, wherein the thick wall portion has a C-shaped cross section with a first longitudinally extending end and a second longitudinally extending end and wherein the thin wall portion extends between the first and second longitudinally extending ends so as to define an expanded lumen extending axially through the inner tubular layer, the expanded lumen having an expanded diameter larger than the initial diameter of the initial elastic lumen and;

    wherein the inner tubular layer, in a compressed condition, extends through the initial elastic lumen of the elastic outer tubular layer with the elastic outer tubular layer urging the first longitudinally extending end under the second longitudinally extending end of the inner tubular layer; and

    wherein the inner tubular layer, in a locally expanded condition, has the first and second longitudinally extending ends radially expanded apart, against the urging of the elastic outer tubular layer by passage of an implant, into a less overlapping condition with the thin wall portion extending therebetween to form the expanded lumen; and

    wherein the inner tubular layer is configured to be urged by the outer elastic tubular layer into the compressed condition after passage of the implant through the expanded lumen.

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