Fluid actuated stent delivery system
First Claim
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1. A delivery system for implanting an expandable stent in a bodily lumen of interest comprising:
- (a) an elongate flexible catheter having distal and proximal ends;
(b) at least one moveable fluid-operated, generally cylindrical tubular sleeve for placement over and retention of a stent in a delivery configuration prior to release, said sleeve being axially adjustable relative to said catheter and said stent, and having a closed end and an open end for release of a contained stent;
(c) an expandable stent having a proximal and distal end and being collapsible about said catheter to a delivery configuration of reduced diameter along the length thereof;
(d) a fluid driven hollow bellows mechanism for axially moving said sleeve comprising a bellows having a fixed seal and a moveable seal, said moveable seal being axially moveable by the extension of said bellows with the movement of said sleeve; and
(e) a fluid supply system for supplying fluid to extend said bellows mechanism to operate said sleeve.
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Abstract
A delivery system for procuring implantation of an expandable stent into a bodily lumen of interest is disclosed including a fluid-operated moving cylinder sleeve for retaining the stent in place during delivery. The sleeve to release a stent at the implantation site. A fluid driven bellows may be employed to retract the sleeve.
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Citations
11 Claims
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1. A delivery system for implanting an expandable stent in a bodily lumen of interest comprising:
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(a) an elongate flexible catheter having distal and proximal ends; (b) at least one moveable fluid-operated, generally cylindrical tubular sleeve for placement over and retention of a stent in a delivery configuration prior to release, said sleeve being axially adjustable relative to said catheter and said stent, and having a closed end and an open end for release of a contained stent; (c) an expandable stent having a proximal and distal end and being collapsible about said catheter to a delivery configuration of reduced diameter along the length thereof; (d) a fluid driven hollow bellows mechanism for axially moving said sleeve comprising a bellows having a fixed seal and a moveable seal, said moveable seal being axially moveable by the extension of said bellows with the movement of said sleeve; and (e) a fluid supply system for supplying fluid to extend said bellows mechanism to operate said sleeve. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of deploying an expandable stent in a body lumen of interest for procuring implantation of the stent comprising the steps of:
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(a) Providing a delivery system for implanting an expandable stent in a body lumen of interest comprising; (1) an elongate flexible catheter having distal and proximal ends; (2) at least one moveable fluid-operated, generally cylindrical tubular sleeve for placement over and retention of a stent in a delivery configuration prior to release, said sleeve being axially adjustable relative to said catheter and said stent; (3) an expandable stent having a proximal and distal end and being collapsible about said catheter to a delivery configuration of reduced diameter along the length thereof; (4) a fluid driven bellows mechanism for axially moving said sleeve comprising a bellows having a fixed seal and a moveable seal, said moveable seal being axially moveable by said bellows with the movement of said sleeve; and (5) a fluid supply system for supplying fluid to said bellows mechanism to operate said sleeve; (b) intraluminally navigating said catheter to place said stent at a deployment site of interest; and (c) infusing fluid into said bellows mechanism in said sleeve to retract said sleeve axially in a direction to release said stent in situ. - View Dependent Claims (8, 9, 10, 11)
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Specification