Endoscopic stone-extraction device
AssigneeInnon Holdings, LLC
InventorAvtar S. Dhindsa
Life of this patent
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Abstract
An endoscopic stone-extraction device is provided comprising a support filament comprising an end portion having a plurality of stacked loops, 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. Movement of the actuator in a first direction retracts the sheath and causes the plurality of stacked loops to expand outside the lumen in an arc-like shape. Movement of the actuator in a second direction advances the sheath and causes the plurality of stacked loops to at least partially collapse inside the lumen. Other embodiments are provides, and any of these embodiments can be used alone or in combination.
Claims22
An endoscopic stone-extraction device comprising:
- a support filament comprising an end portion having a plurality of stacked loops, wherein each of the loops of the plurality of stacked loops is a different size, wherein all of the different-sized loops are arranged in decreasing-size order to form a hood-like structure, and wherein the plurality of stacked loops are nested inside of one another in the same plane when collapsed;
- 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, when a distal end of the sheath is placed behind a distal end of a stone, causes at least one loop of the plurality of stacked loops to expand outside the lumen and lie along a longitudinal axis of the sheath when fully expanded, wherein the stone is fully encircled by at least one of the plurality of stacked loops, wherein there are no elements extending between or across the plurality of stacked loops and the plurality of stacked loops fan out in an arc less than 180 degrees when the plurality of stacked loops expand outside the lumen;
- and
- wherein movement of the actuator in a second direction advances the sheath and causes the plurality of stacked loops to at least partially collapse inside the lumen.
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;
- a handle comprising an actuator and a laser fiber port;
- a laser fiber disposed within the sheath;
- and
- wherein the end portion comprises a plurality of stacked loops, wherein each of the loops of the plurality of stacked loops is a different sizes, wherein all of the different-sized loops are arranged in decreasing-size order to form a hood-like structure, and wherein the plurality of stacked loops are nested inside of one another in the same plane when collapsed, and wherein at least one loop of the plurality of stacked loops expands outside the lumen and lies along a longitudinal axis of the sheath when fully expanded to trap a stone and to serve as a mechanical backstop to prevent migration of a stone, wherein there are no elements extending between or across the plurality of stacked loops and the plurality of stacked loops fan out in an arc less than 180 degrees when the plurality of stacked loops expand outside the lumen, and wherein the stacked loops at least partially collapse inside the lumen.
Dependencies are inferred from the claim text.