Hydraulically actuated dilatation mechanism for vessel dilatation and vascular prosthesis delivery and methods of use
First Claim
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1. A dilatation system comprising:
- a catheter having a bore and a distal end;
a plunger disposed within the bore of the catheter; and
a dilatation mechanism comprising a plurality of radially expandable members, each one of the plurality of radially expandable members having a first end fixed relative to the distal end of the catheter and a second end coupled to the plunger,wherein the radially expandable members move between a transit state having an undeflected position, and a deployed state, wherein the radially expandable members are deflected outwards, responsive to application of an hydraulic load to the plunger.
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Abstract
Apparatus having a dilatation mechanism is provided wherein a plurality of radially expanding members are coupled to a plunger. The radially expanding members deflect outwardly in response to application of an hydraulic load to the plunger. The apparatus may be used in dilating vessels to treat obstructive vascular disease, or used in delivery systems to deploy vascular prostheses such as stents and grafts. Methods of using the apparatus are also provided.
79 Citations
30 Claims
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1. A dilatation system comprising:
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a catheter having a bore and a distal end; a plunger disposed within the bore of the catheter; and a dilatation mechanism comprising a plurality of radially expandable members, each one of the plurality of radially expandable members having a first end fixed relative to the distal end of the catheter and a second end coupled to the plunger, wherein the radially expandable members move between a transit state having an undeflected position, and a deployed state, wherein the radially expandable members are deflected outwards, responsive to application of an hydraulic load to the plunger. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A dilatation system comprising:
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a catheter having a bore and proximal and distal ends; a core member having a distal end and a proximal end, the core member disposed within the catheter; an endcap disposed on the distal end of the core member; a plunger disposed for sliding translation on the core member, the plunger having a proximal end; a plurality of radially expandable members, each one of the plurality of radially expandable members having a distal end affixed to the endcap and a proximal end coupled to the plunger, wherein the radially expandable members move between a transit state, wherein the radially expandable members are in an undeflected position, and a deployed state, wherein the radially expandable members are deflected outwards, responsive to application of an hydraulic load to the proximal end of the plunger. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of dilating a vessel to treat obstructive vascular disease, the method comprising:
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providing a dilatation system comprising a catheter, a plunger disposed within the catheter, and a dilatation mechanism comprising a plurality of radially expandable members coupled to the plunger, the radially expandable members movable between a transit state having an undeflected position, and a deployed state, wherein the radially expandable members are deflected outwards, responsive to application of an hydraulic load to the plunger; inserting the dilatation system percutaneously and transluminally in a vessel to dispose the plurality of radially expandable members within a stenosis; and introducing a pressurizing medium into the catheter to apply an hydraulic load to the plunger that urges the radially expandable members to deflect outwardly to the deployed state. - View Dependent Claims (26, 27)
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28. A method of deploying a vascular prosthesis, the method comprising:
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providing a dilatation system comprising a catheter, a plunger disposed within the catheter, and a dilatation mechanism comprising a plurality of radially expandable members coupled to the plunger, the radially expandable members movable between a transit state having an undeflected position, and a deployed state, wherein the radially expandable members are deflected outwards, responsive to application of an hydraulic load to the plunger; disposing a vascular prosthesis on the dilatation mechanism; inserting the dilatation system and vascular prosthesis percutaneously and transluminally in a vessel to dispose the vascular prosthesis at a desired location within the vessel; and introducing a pressurizing medium into the catheter to apply an hydraulic load to the plunger that urges the radially expandable members to deflect outwardly to the deployed state to expand the prosthesis into engagement with an interior surface of the vessel. - View Dependent Claims (29, 30)
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Specification