Wire collection device with varying collection diameter
First Claim
1. A stent delivery system including a wire collection device, the device comprising:
- a thumbwheel coupled to a collection spindle that is rotatable to collect a retraction wire about a varying collection diameter of the collection spindle, wherein;
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 stent-constraining sheath retractably surrounds a stent, the stent being a distally-disposed self-expanding stent;
the collection spindle comprises an outer diameter being substantially constant and extending from a first end of the collection spindle to a second end of the collection spindle, the outer diameter being greater than the varying collection diameter, and the outer diameter having a surface receiving a retention clip; and
the varying collection diameter increases from the first end of the collection spindle towards the second end of the collection spindle along a spiral groove formed between the varying collection diameter and the outer diameter in a manner that provides substantially constant rotating force on the thumbwheel, accommodating changing resistance as the outer stent-constraining sheath is retracted and releases binding force of the stent.
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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 a varying collection diameter of 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 collection spindle includes a substantially constant outer diameter greater than the varying collection diameter, and the varying collection diameter increases from a first end of the spindle towards a second end of the spindle along a spiral groove formed between the varying collection diameter and the substantially constant outer diameter in a manner that provides substantially constant rotating force on the thumbwheel, 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 delivery system including a wire collection device, the device comprising:
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a thumbwheel coupled to a collection spindle that is rotatable to collect a retraction wire about a varying collection diameter of the collection spindle, wherein; 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 stent-constraining sheath retractably surrounds a stent, the stent being a distally-disposed self-expanding stent; the collection spindle comprises an outer diameter being substantially constant and extending from a first end of the collection spindle to a second end of the collection spindle, the outer diameter being greater than the varying collection diameter, and the outer diameter having a surface receiving a retention clip; and the varying collection diameter increases from the first end of the collection spindle towards the second end of the collection spindle along a spiral groove formed between the varying collection diameter and the outer diameter in a manner that provides substantially constant rotating force on the thumbwheel, accommodating changing resistance as the outer stent-constraining sheath is retracted and releases binding force of the stent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A stent delivery system including a wire collection device, the device comprising:
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a first collection spindle coupled to a proximal end of an outer sheath by a first retraction wire, the first collection spindle rotatable to collect the first retraction wire about a first varying collection diameter of the first collection spindle; a second collection spindle coupled to the proximal end of the outer sheath by a second retraction wire, the second collection spindle rotatable to collect the second retraction wire about a second varying collection diameter of the second collection spindle, and the second collection spindle being co-axial with respect to the first collection spindle; and a thumbwheel coupled between the first collection spindle and the second collection spindle and rotatable to control a retraction speed of the outer sheath by rotating the first collection spindle and the second collection, wherein at least one of the first collection spindle and the second collection spindle has an outer diameter with a surface receiving a retention clip. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A wire collection device for a stent delivery system, the device comprising:
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a pair of co-axial collection spindles coupled to a proximal end of an outer sheath by a pair of retraction wires, the collection spindles rotatable to collect the retraction wires about varying collection diameters of the collection spindles, wherein; the pair of co-axial collection spindles comprise outer diameters that are substantially constant and that are greater than the varying collection diameters, wherein the outer diameters each include a surface that receives a retention clip, the varying collection diameters increase from a first end of each collection spindle to a free end of each collection spindle, the pair of retraction wires are coupled to the first end of each collection spindle, so that collection of the wires begin nearer the first end of each collection spindle and ends nearer the free end of each collection spindle; and a thumbwheel coupled between the collection spindles and rotatable to control a retraction speed of the outer sheath by actuating rotation of the collection spindles. - View Dependent Claims (20)
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Specification