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Variable diameter surgical drains and sheaths

  • US 8,403,913 B2
  • Filed: 06/16/2009
  • Issued: 03/26/2013
  • Est. Priority Date: 06/16/2008
  • Status: Active Grant
First Claim
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1. A surgical drain comprising:

  • an elongated structure comprising;

    a distal end configured to be placed in a body cavity and change in diameter when present in the body cavity from a first diameter to a second diameter that is smaller than the first diameter;

    a proximal end configured to be outside of the body when the distal end is present in the body cavity;

    a lumen configured to drain a substance from the body cavity;

    a wall portion and optionally a core portion; and

    a diameter-varying element that mediates the change in diameter of the distal end and lumen of the elongated structure, wherein the diameter varying element is;

    either present when the elongated structure is initially placed in the body cavity or is inserted into the elongated structure after the elongated structure has been placed in the body cavity;

    is present in the wall portion or the core portion of the elongated structure; and

    comprises a spiral balloon.

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