Multi-sheath delivery catheter
First Claim
1. A delivery catheter for introducing a prosthesis into a body lumen, the delivery catheter comprising a plurality of sequentially retractable nested sheaths for deploying the prosthesis, the nested sheaths comprising an outer sheath having a first member located on an inner surface of the outer sheath and an inner sheath having a second member located on an outer surface of the inner sheath, the outer sheath containing a first discrete portion of the prosthesis and the inner sheath containing a second discrete portion of the prosthesis, the outer sheath adapted to be retracted in a path over the inner sheath until a point at which the first member engages the second member such that further retraction of the outer sheath causes simultaneous retraction of the inner sheath.
1 Assignment
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Accused Products
Abstract
A multi-sheath delivery catheter and method for introducing a prosthesis into a body lumen involving use of (a) an outer sheath adapted to contain a portion of the prosthesis and having an inner surface with a non-round cross-section; (b) a middle sheath slideably disposed at least partly within the outer sheath and adapted to contain another portion of the prosthesis, the middle sheath having a distal end with a first handle attached to it that has a non-round cross-section corresponding to and engaging the non-round cross-section of the inner surface of the outer sheath; and (c) a pusher slideably disposed at least partly within the middle sheath and adapted to engage the prosthesis, relative rotational movement between the outer sheath and the middle sheath is prevented by virtue of the engagement of the non-round cross-section of the first handle with the non-round cross-section of the inner surface of the outer sheath. The delivery catheter has a mechanism for sequentially retracting concentric tubes to deploy the prosthesis.
146 Citations
40 Claims
- 1. A delivery catheter for introducing a prosthesis into a body lumen, the delivery catheter comprising a plurality of sequentially retractable nested sheaths for deploying the prosthesis, the nested sheaths comprising an outer sheath having a first member located on an inner surface of the outer sheath and an inner sheath having a second member located on an outer surface of the inner sheath, the outer sheath containing a first discrete portion of the prosthesis and the inner sheath containing a second discrete portion of the prosthesis, the outer sheath adapted to be retracted in a path over the inner sheath until a point at which the first member engages the second member such that further retraction of the outer sheath causes simultaneous retraction of the inner sheath.
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10. A delivery catheter for introducing a prosthesis into a body lumen, the delivery catheter comprising a plurality of sequentially retractable nested sheaths for deploying the prosthesis, at least one of the nested sheaths adapted to contain at least a portion of the prosthesis, the nested sheaths comprising an outer sheath having a first member located on an inner surface of the outer sheath and an inner sheath having a second member located on an outer surface of the inner sheath, the outer sheath adapted to be retracted in a path over the inner sheath until a point at which the first member engages the second member such that further retraction of the outer sheath causes simultaneous retraction of the inner sheath, the delivery catheter further comprising an anti-rotation element for preventing relative rotation between the inner sheath and the outer sheath.
- 11. A delivery catheter for introducing a modular prosthesis into a body lumen, the delivery catheter comprising a plurality of sequentially retractable nested sheaths for deploying the prosthesis, the nested sheaths comprising an outer sheath having a first member, an inner sheath having a second member, and an anti-rotation element for preventing relative rotation between the inner sheath and the outer sheath, the outer sheath containing a first discrete modular portion of the prosthesis and the inner sheath containing a second discrete modular portion of the prosthesis, the outer sheath adapted to be retracted in a path over the inner sheath until a point at which the first member engages the second member such that further retraction of the outer sheath causes simultaneous retraction of the inner sheath.
- 19. A delivery catheter for introducing a prosthesis into a body lumen, the delivery catheter comprising a plurality of sequentially retractable nested sheaths for deploying the prosthesis, at least one of the nested sheaths adapted to contain at least a portion of the prosthesis, the nested sheaths comprising an outer sheath having a first member located on an inner surface of the outer sheath and an inner sheath having a second member located on an outer surface of the inner sheath, the outer sheath adapted to be retracted in a path over the inner sheath until a point at which the first member engages the second member such that further retraction of the outer sheath causes simultaneous retraction of the inner sheath, the delivery catheter further comprising a pusher slideably disposed at least partly within the inner sheath and adapted to engage at least one portion of the prosthesis, and an anti-rotation element for preventing relative rotation between the pusher and the inner sheath.
- 21. A delivery catheter for introducing a prosthesis into a body lumen, the delivery catheter comprising a plurality of sequentially retractable nested sheaths for deploying the prosthesis, one or more of the nested sheaths adapted to contain at least a portion of the prosthesis, the nested sheaths comprising an outer sheath having a first member, an inner sheath having a second member, and an anti-rotation element for preventing relative rotation between the inner sheath and the outer sheath, the anti-rotation element comprising (a) at least a portion of the outer sheath having a non-round cross-section, and (b) a first handle connected to the inner sheath and having at least a portion with a non-round cross-section corresponding to and adapted to engage the non-round cross-section portion of the outer sheath, the outer sheath adapted to be retracted in a path over the inner sheath until a point at which the first member engages the second member such that further retraction of the outer sheath causes simultaneous retraction of the inner sheath.
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31. A delivery catheter for introducing a prosthesis into a body lumen, the delivery catheter comprising a plurality of sequentially retractable nested sheaths for deploying the prosthesis, at least one of the nested sheaths adapted to contain at least a portion of the prosthesis, the nested sheaths comprising an outer sheath having a first member located on an inner surface of the outer sheath and an inner sheath having a second member located on an outer surface of the inner sheath, the outer sheath adapted to be retracted in a path over the inner sheath until a point at which the first member engages the second member such that further retraction of the outer sheath causes simultaneous retraction of the inner sheath, the delivery catheter further comprising a nose cone at one end of the catheter, the nose cone comprising an air removal port for flushing the catheter and prosthesis to remove air before insertion into the body lumen, wherein the air removal port comprises a groove.
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32. A delivery catheter for introducing a prosthesis into a body lumen, the delivery catheter comprising a plurality of sequentially retractable nested sheaths for deploying the prosthesis, at least one of the nested sheaths adapted to contain at least a portion of the prosthesis, the nested sheaths comprising an outer sheath having a first member, an inner sheath having a second member, and a seal between the inner sheath and the outer sheath comprising a reduced diameter portion of the outer sheath having an inside diameter nearly equivalent to an outside diameter of the inner sheath for minimizing leakage of fluid from the catheter, the outer sheath adapted to be retracted in a path over the inner sheath until a point at which the first member engages the second member such that further retraction of the outer sheath causes simultaneous retraction of the inner sheath, the reduced diameter portion of the outer sheath comprising a portion created by a process comprising the steps of:
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(a) applying a compressive force to a normal diameter portion of the outer sheath that is disposed over the inner sheath; and (b) heating the outer sheath to shrink the outer sheath around the inner sheath. - View Dependent Claims (33)
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34. A delivery catheter for introducing a prosthesis into a body lumen, the delivery catheter comprising a plurality of sequentially retractable nested sheaths for deploying the prosthesis, at least one of the nested sheaths adapted to contain at least a portion of the prosthesis, the nested sheaths comprising:
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an outer sheath having a first member, an inner sheath having a second member, a pusher slideably disposed at least partly within the inner sheath and adapted to engage at least one portion of the prosthesis, a first seal between the inner sheath and the outer sheath, and a second seal between the inner sheath and the pusher, the first seal and the second seal for minimizing leakage of fluid from the catheter, the outer sheath adapted to be retracted in a path over the inner sheath until a point at which the first member engages the second member such that further retraction of the outer sheath causes simultaneous retraction of the inner sheath. - View Dependent Claims (35, 36, 37, 38, 39)
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40. A delivery catheter for introducing a prosthesis into a body lumen, the delivery catheter comprising a plurality of sequentially retractable nested sheaths for deploying the prosthesis, one or more of the nested sheaths adapted to contain at least a portion of the prosthesis, the nested sheaths comprising an outer sheath having a first member, an inner sheath having a second member, an anti-rotation element for preventing relative rotation between the inner sheath and the outer sheath, and a seal between the inner sheath and the outer sheath for minimizing leakage of fluid from the catheter, the seal comprising a reduced diameter portion of the outer sheath having an inside diameter nearly equivalent to an outside diameter of the inner sheath, the outer sheath adapted to contain a first portion of the prosthesis and the inner sheath adapted to contain a second portion of the prosthesis, the outer sheath adapted to be retracted in a path over the inner sheath until a point at which the first member engages the second member such that further retraction of the outer sheath causes simultaneous retraction of the inner sheath.
Specification