Controlled endoprosthesis balloon expansion
First Claim
1. A medical assembly, comprising:
- balloon expandable endoprosthesis having a first end and a second end, the endoprosthesis being deployable from an undeployed state with an undeployed diameter to a deployed state with a deployed diameter; and
a catheter assembly onto which the endoprosthesis is assembled, the catheter assembly comprising;
a balloon; and
a cover along the balloon, wherein the endoprosthesis is coaxially located about the balloon and the cover,wherein an end portion of the balloon and the cover are configured to inflate to cause an end portion of the endoprosthesis to expand to an end portion intermediate diameter that is greater than the undeployed diameter and less than the deployed diameter, and a middle portion of the balloon and cover are configured to inflate to cause a middle portion of the endoprosthesis to expand to a middle portion intermediate diameter that is less than the end portion intermediate diameter, upon increasing an inflation pressure within the balloon to a first inflation pressure, the catheter assembly being configured such that the middle portion intermediate diameter and the end portion intermediate diameter can be maintained as the inflation pressure within the balloon is increased beyond the first inflation pressure and until the inflation pressure increases by at least 1 atmosphere to overcome a yield strength of the cover such that the cover plastically deforms, at least in part, such that the middle portion and the end portions of the balloon and the cover further inflate to cause the endoprosthesis to expand from the middle portion intermediate diameter and the end portion intermediate diameter to the deployed diameter such that the middle portion and the end portion have substantially equalized diameters in the deployed state.
1 Assignment
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Accused Products
Abstract
A medical assembly includes a balloon expandable endoprosthesis comprising a plurality of ringed stent elements flexibly connected to each other via at least one flexible connector, the endoprosthesis being deployable from an undeployed state with an undeployed diameter to a deployed state with a deployed diameter. The medical assembly further includes a catheter assembly comprising a balloon, and a cover along the balloon. The endoprosthesis is coaxially located about the balloon and the cover. One or more portions of the balloon and the cover reach an intermediate diameter between the undeployed diameter and the deployed diameter in which the portions of the balloon and the cover are inflated by increasing an inflation pressure within the balloon and approximately maintained at about the intermediate diameter until the inflation pressure increases by at least 1 atmosphere to overcome a yield strength of the cover.
283 Citations
24 Claims
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1. A medical assembly, comprising:
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balloon expandable endoprosthesis having a first end and a second end, the endoprosthesis being deployable from an undeployed state with an undeployed diameter to a deployed state with a deployed diameter; and a catheter assembly onto which the endoprosthesis is assembled, the catheter assembly comprising; a balloon; and a cover along the balloon, wherein the endoprosthesis is coaxially located about the balloon and the cover, wherein an end portion of the balloon and the cover are configured to inflate to cause an end portion of the endoprosthesis to expand to an end portion intermediate diameter that is greater than the undeployed diameter and less than the deployed diameter, and a middle portion of the balloon and cover are configured to inflate to cause a middle portion of the endoprosthesis to expand to a middle portion intermediate diameter that is less than the end portion intermediate diameter, upon increasing an inflation pressure within the balloon to a first inflation pressure, the catheter assembly being configured such that the middle portion intermediate diameter and the end portion intermediate diameter can be maintained as the inflation pressure within the balloon is increased beyond the first inflation pressure and until the inflation pressure increases by at least 1 atmosphere to overcome a yield strength of the cover such that the cover plastically deforms, at least in part, such that the middle portion and the end portions of the balloon and the cover further inflate to cause the endoprosthesis to expand from the middle portion intermediate diameter and the end portion intermediate diameter to the deployed diameter such that the middle portion and the end portion have substantially equalized diameters in the deployed state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of implanting endoprosthesis comprising:
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inserting a distal end of a medical assembly into a vasculature of a patient, wherein the medical assembly comprises; a balloon expandable endoprosthesis having a first end and a second end, the endoprosthesis being deployable from an undeployed state with an undeployed diameter to a deployed state with a deployed diameter; and a catheter assembly onto which the endoprosthesis is assembled, the catheter assembly comprising; a balloon; and a cover along the balloon, wherein the endoprosthesis is coaxially located about the balloon and the cover, wherein an end portion of the balloon and the cover are configured to inflate to cause an end portion of the endoprosthesis to expand to an end portion intermediate diameter that is greater than the undeployed diameter and less than the deployed diameter and a middle portion of the balloon and cover are configured to inflate to cause a middle portion of the endoprosthesis to expand to a middle portion intermediate diameter that is less than the end portion intermediate diameter, upon increasing an inflation pressure within the balloon to a first inflation pressure, the catheter assembly being configured such that the middle portion intermediate diameter and the end portion intermediate diameter can be maintained as the inflation pressure within the balloon is increased beyond the first inflation pressure and until the inflation pressure increases by at least 1 atmosphere to overcome a yield strength of the cover such that the cover plastically deforms, at least in part, such that the middle portion and the end portions of the balloon and the cover further inflate to cause the endoprosthesis to expand from the middle portion intermediate diameter and the end portion intermediate diameter to the deployed diameter such that the middle portion and the end portion have substantially equalized diameters in the deployed state, the method further comprising, delivering, with the medical assembly, the endoprosthesis mounted over the balloon to a treatment site within the vasculature of the patient or another vasculature of the patient; and remotely inflating the balloon to expand the endoprosthesis from the undeployed diameter to the deployed diameter. - View Dependent Claims (17, 18)
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19. A method of making a deployment system comprises assembling balloon expandable endoprosthesis having a first end and a second end to a catheter assembly comprising an expandable balloon and a cover such that the endoprosthesis is mounted over the balloon and the cover with the endoprosthesis being deployable via expansion of the balloon, the endoprosthesis providing an balloon undeployed diameter and a balloon deployed diameter,
the endoprosthesis being deployable from an undeployed state with an endoprosthesis undeployed diameter to a deployed state with an endoprosthesis deployed diameter, wherein an end portion of the balloon and the cover reach an end portion intermediate diameter between the balloon undeployed diameter and the balloon deployed diameter, and a middle portion of the balloon and the cover reach a middle portion intermediate diameter that is less than the end portion intermediate diameter, in response to an inflation pressure within the balloon increasing to a first inflation pressure, and wherein the balloon is configured such that the balloon can be maintained at approximately the middle portion intermediate diameter and the end portion intermediate diameter as the inflation pressure within the balloon is increased beyond the first inflation pressure and until the inflation pressure increases by at least 1 atmosphere to overcome a yield strength of the cover at which point the cover is configured to yield such that the middle portion and the end portion of the balloon and the cover further inflate to the balloon deployed diameter such that the middle portion and the end portion have substantially equalized diameters in the deployed state to cause the endoprosthesis to expand to the endoprosthesis deployed diameter.
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22. A medical assembly, comprising:
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A balloon expandable endoprosthesis having a first end and a second end, the endoprosthesis being deployable from an undeployed state with an undeployed diameter to a deployed state with a deployed diameter; and a catheter assembly onto which the endoprosthesis is assembled, the catheter assembly comprising; a balloon; and a cover coupled to the balloon, wherein the endoprosthesis is coaxially located about the balloon and the cover, wherein the deployed diameter is at least 11 millimeters, and wherein an end portion of the balloon and the cover are configured to cause an end portion of the endoprosthesis to expand to an end portion intermediate diameter between the undeployed diameter and the deployed diameter, and a middle portion of the balloon and the cover are configured to inflate to cause a middle portion of the endoprosthesis to expand to a middle portion intermediate diameter that is less than the end portion intermediate diameter, in response to an inflation pressure within the balloon increasing to a first inflation pressure, and wherein the balloon is configured such that the balloon can be maintained at approximately the middle portion intermediate diameter and the end portion intermediate diameter until the inflation pressure increases by at least 1 atmosphere to overcome a yield strength of the cover at which point the cover is configured to yield such that the balloon is operable to expand the endoprosthesis to the deployed diameter such that the middle portion and the end portion have substantially equalized diameters in the deployed state. - View Dependent Claims (23, 24)
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Specification