WIRE COLLECTION DEVICE WITH GEARED ADVANTAGE
First Claim
1. A stent deployment system, including a wire collection device comprising:
- a collection spindle rotatable to collect a retraction wire around the collection spindle, the retraction wire coupled to an outer sheath retractable to deploy a stent;
a first driven gear and a second driven gear mounted along the collection spindle, a radius of the second driven gear being greater than a radius of the first driven gear;
a thumbwheel mounted on a wheel axle substantially parallel to the collection spindle, the thumbwheel rotatable and disposed in mechanical communication with the wheel axle to actuate rotation of the wheel axle;
a first actuating gear and a second actuating gear, the first actuating gear sized to engage the first driven gear to collect the retraction wire at a first speed and the second actuating gear sized to engage the second driven gear to collect the retraction wire at a second speed greater than the first speed.
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Accused Products
Abstract
A stent delivery system includes a wire collection device which is constructed with a thumbwheel coupled to a collection spindle that is rotatable to collect a retraction wire about the collection spindle. 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 sheath retractably surrounds a distally-disposed self-expanding stent. The wire collection device includes a first set of gears at a higher gear ratio and a second set of gears at a lower gear ratio. Stent deployment speed may be controlled or varied by switching or alternating between engaging the first of gears and the second set of gears, thereby accommodating changing resistance as the outer sheath is retracted and releases binding force of the stent.
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Citations
20 Claims
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1. A stent deployment system, including a wire collection device comprising:
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a collection spindle rotatable to collect a retraction wire around the collection spindle, the retraction wire coupled to an outer sheath retractable to deploy a stent; a first driven gear and a second driven gear mounted along the collection spindle, a radius of the second driven gear being greater than a radius of the first driven gear; a thumbwheel mounted on a wheel axle substantially parallel to the collection spindle, the thumbwheel rotatable and disposed in mechanical communication with the wheel axle to actuate rotation of the wheel axle; a first actuating gear and a second actuating gear, the first actuating gear sized to engage the first driven gear to collect the retraction wire at a first speed and the second actuating gear sized to engage the second driven gear to collect the retraction wire at a second speed greater than the first speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for deploying a stent, the method comprising:
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rotating a thumbwheel assembly to actuate rotation of a wire collection assembly thereby collecting a retraction wire around a collection spindle of the wire collection assembly, the retraction wire coupled to an outer sheath retractable to deploy a stent, the thumbwheel assembly comprising a wheel axle, and a thumbwheel and first and second actuating gears mounted thereon; and
wherein actuating rotation of the wire collection assembly causes the collection spindle to;rotate at a first speed when the first actuating gear of the thumbwheel assembly engages a first driven gear of the wire collection assembly; and rotate at a second speed when the second actuating gear of the thumbwheel assembly engages a second driven gear of the wire collection assembly. - View Dependent Claims (14, 15)
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16. A wire collection device for a stent deployment system, the wire collection device comprising:
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a thumbwheel coupled to an axle and located between a first actuating gear and a second actuating gear, such that the thumbwheel, the first actuating gear, and the second actuating gear are rotatable about a longitudinal axis of the axle; a wire collection spindle that is rotatable to collect a retraction wire coupled to a proximal end of an outer sheath, the wire collection spindle located a predetermined distance from the axle; a first driven gear and a second driven gear mounted to the wire collection spindle and rotatable about a longitudinal axis of the wire collection spindle; and
wherein;a radius of the first actuating gear is greater than a radius of the second actuating gear, a radius of the first driven gear is less than a radius of the second driven gear, the thumbwheel is slidable along the longitudinal axis of the axle between a first position, wherein the first actuating gear engages the first driven gear, and a second position, wherein the second actuating gear engages the second driven gear, so as to vary a wire collection speed between a higher speed and a lower speed. - View Dependent Claims (17, 18, 19, 20)
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Specification