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Endoscopic Stone-Extraction Device

  • US 20170258481A1
  • Filed: 05/22/2017
  • Published: 09/14/2017
  • Est. Priority Date: 06/12/2014
  • Status: Active Grant
First Claim
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1. An endoscopic stone-extraction device comprising:

  • a support filament comprising an end portion;

    a sheath comprising a lumen, wherein the support filament is disposed in the lumen such that the sheath is slideable with respect to the support filament; and

    a laser fiber disposed within the sheath;

    wherein movement of the actuator in a first direction retracts the sheath and causes the end portion to expand outside the lumen in a two-dimensional mesh shape that is generally perpendicular to an axis of the lumen;

    wherein the two-dimensional mesh shape is made of a shape memory material and is connected to the support filament via two secondary filaments;

    wherein the two secondary filaments attach on two opposite sides of the two-dimensional mesh shape; and

    wherein movement of the actuator in a second direction advances the sheath and causes the two-dimensional mesh shape to at least partially collapse inside the lumen.

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