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Retractable sheath devices, systems, and methods

  • US 9,901,715 B2
  • Filed: 09/04/2013
  • Issued: 02/27/2018
  • Est. Priority Date: 09/05/2012
  • Status: Active Grant
First Claim
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1. A medical device comprising:

  • an expandable member having an outer surface; and

    a sheath comprising a neckable element having a flattened form along the outer surface of the expandable member, the neckable element being a distinctive layer of material which has a width defined by edges of the distinctive layer of material such that when said distinctive layer of material is helically or circumferentially wrapped around said expandable member in an unexpanded state, the edges of said distinctive layer of material are overlapping or touching one another,wherein when said expandable member expands to the expanded state, the expandable member causes the neckable element to lengthen and the width of the distinctive layer to reduce such that the edges of said distinctive layer of material separate from one another, thereby exposing at least a portion of said outer surface.

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