Endoscopic stone extraction device with improved basket
First Claim
1. An endoscopic stone-extraction device comprising:
- a support filament comprising a first end portion and a second end portion;
a sheath comprising a lumen, the support filament disposed in the lumen such that the sheath is slideable with respect to the support filament;
a stone-extraction basket carried by the first end portion of the support filament;
a handle comprising an actuator, wherein movement of the actuator in a first direction advances the sheath and causes the basket to at least partially collapse inside the lumen of the sheath, and wherein movement of the actuator in a second direction retracts the sheath and causes the basket to expand to an operational shape outside the lumen of the sheath;
the basket comprising a stone-entrance region and a stone-retention region, the stone-entrance region comprising a first, larger opening sized to admit a stone into the basket, the stone-retention region comprising a plurality of second openings, all of the second openings being smaller than the first opening;
the first opening facing laterally away from a longitudinal axis extending through the basket and passing through the first end portion of the support filament, the stone-retention region extending over more than one-half of a total surface area defined by the basket.
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Accused Products
Abstract
An endoscopic stone extraction device includes a handle that supports a sheath, and a filament such as a wire slidably disposed in the sheath. One end of the wire is mounted to the handle for rotation with respect to the handle and the other end of the handle supports a stone extraction basket. A manipulator is provided on the wire to allow a user to rotate the filament and therefore the basket with respect to the handle. The basket can have a side-facing opening or a rear-facing opening. In either case, a stone retention region is provided with relatively small openings sized to retain stones smaller than two millimeters in diameter. A collapsible rake is disclosed which facilitates the collection and extraction of stone fragments.
85 Citations
17 Claims
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1. An endoscopic stone-extraction device comprising:
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a support filament comprising a first end portion and a second end portion;
a sheath comprising a lumen, the support filament disposed in the lumen such that the sheath is slideable with respect to the support filament;
a stone-extraction basket carried by the first end portion of the support filament;
a handle comprising an actuator, wherein movement of the actuator in a first direction advances the sheath and causes the basket to at least partially collapse inside the lumen of the sheath, and wherein movement of the actuator in a second direction retracts the sheath and causes the basket to expand to an operational shape outside the lumen of the sheath;
the basket comprising a stone-entrance region and a stone-retention region, the stone-entrance region comprising a first, larger opening sized to admit a stone into the basket, the stone-retention region comprising a plurality of second openings, all of the second openings being smaller than the first opening;
the first opening facing laterally away from a longitudinal axis extending through the basket and passing through the first end portion of the support filament, the stone-retention region extending over more than one-half of a total surface area defined by the basket. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An endoscopic stone-extraction device comprising:
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a support filament comprising a first end portion and a second end portion;
a sheath comprising a lumen, the support filament disposed in the lumen such that the sheath is slideable with respect to the support filament;
a stone-extraction basket carried by the first end portion of the support filament;
a handle comprising an actuator, wherein movement of the actuator in a first direction advances the sheath and causes the basket to at least partially collapse inside the lumen of the sheath, and wherein movement of the actuator in a second direction retracts the sheath and causes the basket to expand to an operational shape outside the lumen of the sheath;
the basket comprising a stone-entrance region and a stone-retention region, the stone-entrance region comprising a first, larger opening sized to admit a stone into the basket, the stone-retention region comprising a plurality of second openings, all of the second openings being smaller than the first opening;
the first opening facing laterally away from a longitudinal axis extending through the basket and passing through the first end portion of the support filament;
the stone-retention region extending over a continuous arc of greater than 180°
.- View Dependent Claims (15, 16, 17)
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Specification