Stent delivery system for self-expanding stent
First Claim
Patent Images
1. A treatment element delivery device, comprising:
- an outer shaft comprising a tapered distal end, a proximal end, and a lumen therebetween;
an inner shaft slidably disposed within and concentric with the outer shaft, comprising a proximal end and a tapered distal end configured to engage the outer shaft distal end, wherein the outer shaft distal end is positioned distal to the inner shaft distal end, and the outer shaft is slidable relative to the inner shaft between a first position in which the distal end of the inner shaft is positioned within the lumen of the outer shaft and spaced from the distal end of the outer shaft and a second position in which the distal end of the inner shaft matingly engages the distal end of the outer shaft;
a rigid inner member having distal and proximal ends and an interior portion disposed inside the inner shaft and defining a lumen within the inner shaft, the proximal end of the rigid inner member being coupled to the proximal end of the inner shaft, the rigid inner member further comprising an exterior portion protruding beyond the distal end of the inner shaft;
a stepped exterior tube comprising a wide diameter end and a sheath, the wide diameter end being rigidly coupled to the distal end of the outer shaft and fully enclosing the exterior portion of the rigid inner member in the second position; and
a catheter coupled to and extending distally from the rigid inner member distal end,the distal end of the catheter comprising a mounting region for a treatment element, said treatment element mounting region being covered by the distal end of the sheath in the first position, and the treatment element mounting region being uncovered by the distal end of the sheath in the second position.
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Abstract
A delivery device for a catheter-sheath assembly includes an outer shaft having proximal and distal ends, an inner shaft having proximal and distal ends, and a rigid inner member disposed within the inner shaft. A catheter is secured to the rigid inner member and a sheath extends from the outer shaft, covering the catheter and a stent maintained on the distal end of the catheter. The outer shaft is directable from a first position to a second position to retract the distal end of the sheath with respect to the catheter to deploy a stent or other therapeutic or corrective element from within the sheath.
57 Citations
10 Claims
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1. A treatment element delivery device, comprising:
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an outer shaft comprising a tapered distal end, a proximal end, and a lumen therebetween; an inner shaft slidably disposed within and concentric with the outer shaft, comprising a proximal end and a tapered distal end configured to engage the outer shaft distal end, wherein the outer shaft distal end is positioned distal to the inner shaft distal end, and the outer shaft is slidable relative to the inner shaft between a first position in which the distal end of the inner shaft is positioned within the lumen of the outer shaft and spaced from the distal end of the outer shaft and a second position in which the distal end of the inner shaft matingly engages the distal end of the outer shaft; a rigid inner member having distal and proximal ends and an interior portion disposed inside the inner shaft and defining a lumen within the inner shaft, the proximal end of the rigid inner member being coupled to the proximal end of the inner shaft, the rigid inner member further comprising an exterior portion protruding beyond the distal end of the inner shaft; a stepped exterior tube comprising a wide diameter end and a sheath, the wide diameter end being rigidly coupled to the distal end of the outer shaft and fully enclosing the exterior portion of the rigid inner member in the second position; and a catheter coupled to and extending distally from the rigid inner member distal end, the distal end of the catheter comprising a mounting region for a treatment element, said treatment element mounting region being covered by the distal end of the sheath in the first position, and the treatment element mounting region being uncovered by the distal end of the sheath in the second position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A treatment element delivery device, comprising:
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an outer shaft comprising distal and proximal ends and a lumen therebetween, wherein the distal end includes a tapered inner surface; an inner shaft slidably disposed within and concentric with outer shaft, comprising a proximal end and a distal end having a tapered outer surface configured to matingly engage the tapered inner surface of the outer shaft distal end, wherein the outer shaft distal end is positioned distal to the inner shaft distal end, and the outer shaft is slidable relative to the inner shaft between a first position in which the distal end of the inner shaft is positioned within the lumen of the outer shaft and spaced from the distal end of the outer shaft and a second position in which the tapered outer surface of the distal end of the inner shaft matingly engages the tapered inner surface of the distal end of the outer shaft; a rigid inner member having distal and proximal ends and an interior portion disposed inside the inner shaft and defining a lumen within the inner shaft, the proximal end of the rigid inner member being coupled to the proximal end of the inner shaft, the rigid inner member further comprising an exterior portion protruding beyond the distal end of the inner shaft; a stepped exterior tube, comprising a wide diameter end and a sheath, the wide diameter end being rigidly coupled to the distal end of the outer shaft and fully enclosing the exterior portion of the rigid inner member in the second position; the sheath having distal and proximal ends, and being directly movable by movement of the outer shaft from the first position to the second position; a catheter, comprising a distal end and a proximal end, the proximal end of the catheter being coupled to and extending distally from the rigid inner member, the distal end of the catheter being disposed adjacent the distal end of the sheath, the distal end of the catheter being covered by the distal end of the sheath in the first position, and the distal end of the catheter being uncovered by the distal end of the sheath in the second position; and a stent disposed on the distal end of the catheter, wherein the stent is deployed when the distal end of the sheath uncovers the distal end of the catheter by movement of the outer shaft from the first position to the second position.
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10. A method of deploying a treatment element, comprising:
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providing an outer shaft comprising distal and proximal ends and a lumen therebetween; providing an inner shaft comprising distal and proximal ends, slidably disposed within and concentric with the outer shaft, comprising a proximal end and a distal end configured to engage the outer shaft distal end, wherein the outer shaft distal end is positioned distal to the inner shaft distal end; providing a rigid inner member comprising distal and proximal ends, the rigid inner member further comprising an interior portion disposed inside the inner shaft and defining a lumen within the inner shaft, the proximal end of the rigid inner member being directly mounted to the proximal end of the inner shaft, the rigid inner member further comprising an exterior portion protruding beyond the distal end of the inner shaft; providing a catheter comprising a proximal end and a distal end, the proximal end of the catheter being rigidly coupled to and extending distally from the rigid inner member and the distal end comprising a treatment element mounting region; providing a stepped exterior tube comprising a wide diameter end and a sheath, the wide diameter end being rigidly coupled to the distal end of the outer shaft and fully enclosing the exterior portion of the rigid inner member in the second position, the sheath comprising a proximal end and a distal end, the proximal end being fixedly connected to the distal end of the outer shaft, the distal end being disposed proximate the distal end of the catheter; and uncovering the treatment element mounting region at the distal end of the catheter from the distal end of the sheath by moving the outer shaft from a first position in which the inner shaft is positioned within the lumen of the outer shaft and the proximal end of the outer shaft is spaced from the proximal end of the inner shaft to a second position in which the proximal end of the outer shaft engages the proximal end of the inner shaft.
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Specification