Patent ID: 9655634
Date: 2017-05-23
CPC Classifications: A61B

Claim:
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 handle comprising an actuator and a laser fiber port; wherein a laser fiber is 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 metal, is square, 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 between two corners 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 in an inverted C-shape inside the lumen.