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Wire collection device with varying collection diameter

  • US 9,974,678 B2
  • Filed: 03/05/2015
  • Issued: 05/22/2018
  • Est. Priority Date: 03/10/2014
  • Status: Active Grant
First Claim
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1. A stent delivery system including a wire collection device, the device comprising:

  • a thumbwheel coupled to a collection spindle that is rotatable to collect a retraction wire about a varying collection diameter of the collection spindle, wherein;

    a proximal end of an outer stent-constraining sheath is coupled to the collection spindle by the retraction wire and a distal end of the outer stent-constraining sheath retractably surrounds a stent, the stent being a distally-disposed self-expanding stent;

    the collection spindle comprises an outer diameter being substantially constant and extending from a first end of the collection spindle to a second end of the collection spindle, the outer diameter being greater than the varying collection diameter, and the outer diameter having a surface receiving a retention clip; and

    the varying collection diameter increases from the first end of the collection spindle towards the second end of the collection spindle along a spiral groove formed between the varying collection diameter and the outer diameter in a manner that provides substantially constant rotating force on the thumbwheel, accommodating changing resistance as the outer stent-constraining sheath is retracted and releases binding force of the stent.

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