Stent deployment apparatus and method
First Claim
Patent Images
1. In combination:
- a catheter including an elongated catheter shaft having a proximal end and a distal end, a balloon supported at the distal end and an inflation lumen extending therethrough and in fluid communication with the balloon; and
a stent deployment device including a tubular member having a proximal and distal end slidably coupleable along the catheter shaft and the tubular member including an expandable stent sheath expandable between a first diameter dimension and a second diameter dimension for deployment of a stent supported thereby, the length of the tubular member being sized so that the length of the balloon is at least approximately as long as the stent sheath and a length of the tubular member between the proximal end and distal end does not extend along a substantial length of the catheter shaft, the proximal end of the tubular member being without circumferential connection to a support tube for operation and use.
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Accused Products
Abstract
An improved deployment system deploys a stent to maintain the patency of a dilated vessel. The improved stent deployment system is adapted for deployment with a balloon catheter. The stent deployment system includes an expandable stent sheath for supporting the stent for deployment. The stent sheath is movably coupled to a catheter shaft and is relatively short in comparison to the catheter shaft. The stent sheath is movably coupled to the catheter shaft for movement between a retracted position and an advanced deployment position aligned with the balloon for expansion via the balloon for deployment of the stent supported thereby.
542 Citations
21 Claims
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1. In combination:
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a catheter including an elongated catheter shaft having a proximal end and a distal end, a balloon supported at the distal end and an inflation lumen extending therethrough and in fluid communication with the balloon; and
a stent deployment device including a tubular member having a proximal and distal end slidably coupleable along the catheter shaft and the tubular member including an expandable stent sheath expandable between a first diameter dimension and a second diameter dimension for deployment of a stent supported thereby, the length of the tubular member being sized so that the length of the balloon is at least approximately as long as the stent sheath and a length of the tubular member between the proximal end and distal end does not extend along a substantial length of the catheter shaft, the proximal end of the tubular member being without circumferential connection to a support tube for operation and use. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A dual function catheter adapted for dilation of an occluded vessel and deployment of an expandable stent comprising:
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an elongated catheter shaft having a proximal end and a distal end, and an inflation lumen extending therethrough and a dilation balloon supported at the distal end of the catheter shaft;
an expandable stent sheath, said stent sheath being movably supported relative to the catheter shaft for alignment of the stent sheath relative to the balloon and expandable thereby for deployment of a stent supported thereby; and
a stent sheath shaft fixed to the catheter shaft and the stent sheath is coupled to the stent sheath shaft and movable relative to the catheter shaft. - View Dependent Claims (10)
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11. A catheter comprising:
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a catheter shaft having a balloon supported at a distal end;
a stent sheath expandable for deployment of a stent; and
the catheter shaft including a stent sheath shaft including a rigid portion and an axially collapsible portion to movably support the stent sheath coupled to the stent sheath shaft between a retracted position and an advanced position. - View Dependent Claims (12)
the rigid portion includes a proximal and distal end and the proximal end is fixed to a proximal end portion of the catheter shaft; and
the collapsible portion includes a proximal end and a distal end and the proximal end of the collapsible portion is connected to the distal end of the rigid portion.
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13. A method for dilating a lesion and deploying a stent comprising the steps of:
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providing an elongated catheter shaft having a proximal end and a distal end and a dilation balloon supported at the distal end;
providing a tubular member having a proximal and distal end and including an expandable stent sheath, the tubular member being premounted on the catheter shaft;
inserting the catheter shaft into a patient for treatment and positioning the balloon across a lesion at a treatment site with the expandable stent sheath withdrawn from the balloon and the tubular member supported entirely on a proximal end portion of the catheter shaft;
inflating the balloon;
deflating the balloon;
withdrawing the catheter shaft from the patient;
advancing the stent sheath over the balloon;
advancing the catheter shaft with the stent sheath positioned over the balloon to the treatment site; and
reinflating the balloon to deploy a stent. - View Dependent Claims (14, 15, 16, 17)
hand manipulating the stent sheath to position the stent sheath over the balloon.
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17. The method of claim 13 wherein the stent sheath is advanced over the balloon by hand.
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18. A catheter comprising:
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a catheter shaft having a balloon supported at a distal end and an inflation lumen extending through the catheter shaft and opened to the balloon;
a stent deployment device including a tubular member having a proximal and distal end and an expandable stent sheath;
a push rod connected to the proximal end of the tubular member; and
the catheter shaft including a push rod lumen and the push rod extending through the push rod lumen of the catheter shaft. - View Dependent Claims (19)
a proximal neck portion.
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20. A method for treating a patient comprising steps of:
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providing an elongated catheter shaft having a proximal end and a distal end and a dilatation balloon supported at the distal end;
providing a tubular member having a proximal and distal end and an expandable stent sheath;
slidably positioning the tubular member to align with a first stop member spaced from a proximal end portion of the catheter shaft to support the expandable stent sheath spaced from the balloon in a retracted position;
inserting the catheter shaft and expandable stent sheath with the expandable stent sheath in the retracted position into a patient for treatment and advancing the catheter shaft to position the balloon across a lesion at a treatment site;
inflating the balloon while the stent sheath is in the retracted position;
deflating the balloon;
withdrawing the catheter shaft and [expandable stent] tubular member from the patient;
grasping the tubular member proximate to the first stop member and slidably advancing the tubular member to align with a second stop member distally spaced from the first stop member to support the expandable stent sheath in an advanced position with the expandable stent sheath aligned with the balloon;
advancing the catheter shaft and the tubular member aligned with the second stop member to the treatment site; and
reinflating the balloon to deploy a stent.
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21. A method for treating a patient comprising steps of:
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providing an elongated catheter shaft having a proximal end and a distal end and a dilation balloon supported at the distal end;
providing an expandable stent sheath premounted on the catheter shaft;
inserting the catheter shaft into a patient for treatment and positioning the balloon across a lesion at a treatment site;
inflating the balloon;
deflating the balloon;
withdrawing the catheter shaft from the patient;
grasping the stent sheath and moving the stent sheath over the balloon;
advancing the catheter shaft and the stent sheath to the treatment site; and
reinflating the balloon to deploy a stent.
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Specification