Endoprosthesis delivery system
First Claim
Patent Images
1. An endoprosthesis delivery system comprising:
- an endoprosthesis;
a catheter shaft having a leading tip;
an introducer sheath having a leading end and an inner diameter less than the outer diameter of the endoprosthesis;
a sock extending from the leading end of the introducer sheath over the endoprosthesis, the sock providing an initial diameter;
a tapered sock retaining segment, wherein the sock extends over the tapered sock retaining segment and into a cavity between the leading tip and the sock retaining segment, the sock being retained in the cavity so as to prevent displacement of the sock as the catheter traverses vasculature during delivery of the endoprosthesis to a treatment site, the cavity being formed along a leading surface of the sock retaining segment which is spaced apart from and faces the leading tip; and
a sock securing element comprising a suture configured to constrain the sock distal to the endoprosthesis to reduce the initial diameter of the sock to a reduced diameter distal to the endoprosthesis, the sock securing element further configured to release the sock in response to actuation of a pull string to restore the reduced diameter to the initial diameter and allow a distal end of the sock in the initial diameter to be retracted over the endoprosthesis.
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Abstract
The present disclosure relates to catheters for delivering medical devices to a human patient'"'"'s vasculature. A catheter comprises a sock which covers the medical device at the end of the catheter, and an introducer sheath which is reduced in diameter. This reduced diameter introducer sheath minimizes the crossing of the catheter.
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Citations
21 Claims
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1. An endoprosthesis delivery system comprising:
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an endoprosthesis; a catheter shaft having a leading tip; an introducer sheath having a leading end and an inner diameter less than the outer diameter of the endoprosthesis; a sock extending from the leading end of the introducer sheath over the endoprosthesis, the sock providing an initial diameter; a tapered sock retaining segment, wherein the sock extends over the tapered sock retaining segment and into a cavity between the leading tip and the sock retaining segment, the sock being retained in the cavity so as to prevent displacement of the sock as the catheter traverses vasculature during delivery of the endoprosthesis to a treatment site, the cavity being formed along a leading surface of the sock retaining segment which is spaced apart from and faces the leading tip; and a sock securing element comprising a suture configured to constrain the sock distal to the endoprosthesis to reduce the initial diameter of the sock to a reduced diameter distal to the endoprosthesis, the sock securing element further configured to release the sock in response to actuation of a pull string to restore the reduced diameter to the initial diameter and allow a distal end of the sock in the initial diameter to be retracted over the endoprosthesis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An endoprosthesis delivery system comprising:
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an endoprosthesis; a catheter shaft having a leading tip; an introducer sheath having a leading end and an inner diameter less than the outer diameter of the endoprosthesis; a sock extending from the leading end of the introducer sheath over the endoprosthesis, the sock providing an initial diameter; and a sock securing element comprising a suture configured to constrain the sock distal to the endoprosthesis to reduce the initial diameter of the sock to a reduced diameter distal to the endoprosthesis, wherein the sock securing element retains the sock so as to prevent displacement of the sock as the catheter traverses vasculature during delivery of the endoprosthesis to a treatment site until the sock securing element is actuated to expand the reduced diameter of the sock to the initial diameter and allow a distal end of the sock in the initial diameter to be retracted over the endoprosthesis to allow deployment of the endoprosthesis. - View Dependent Claims (16, 17, 18, 19)
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20. An endoprosthesis delivery system comprising:
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an endoprosthesis; a catheter shaft having a leading tip; an introducer sheath having a leading end and an inner diameter less than the outer diameter of the endoprosthesis; a deployment sheath surrounding the endoprosthesis and retaining it in a collapsed configuration; a sock of tubular construction extending outward from the leading end of introducer sheath and surrounding the endoprosthesis and the deployment sheath, the sock providing an initial diameter; a tapered sock retaining segment, wherein the sock extends over the tapered sock retaining segment and into a cavity between the leading tip and the sock retaining segment, the sock being retained in the cavity so as to prevent displacement of the sock as the catheter traverses vasculature during delivery of the endoprosthesis to a treatment site, the cavity being formed along a leading surface of the sock retaining segment which is spaced apart from and faces the leading tip; and a sock securing element comprising a suture configured to constrain the sock distal to the endoprosthesis to reduce the initial diameter of the sock to a reduced diameter distal to the endoprosthesis, wherein the sock securing element retains the sock so as to prevent displacement of the sock as the catheter traverses vasculature during delivery of the endoprosthesis to a treatment site until the sock securing element is actuated to expand the reduced diameter of the sock to the initial diameter and allow a distal end of the sock in the initial diameter to be retracted over the endoprosthesis to allow deployment of the endoprosthesis. - View Dependent Claims (21)
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Specification