System for implanting a replacement valve
First Claim
1. A delivery system for percutaneously implanting a heart valve assembly at an implantation site within a patient, the delivery system comprising:
- an elongated catheter;
a stop on the elongated catheter;
a tip at a distal end of the elongated catheter;
a sheath configured to slidably receive the elongated catheter; and
a protective shield at a distal end of the sheath;
wherein the sheath and protective shield are moveable relative to the elongated catheter and the stop between a first dosed position with a distal end portion of the protective shield being engaged with a proximal end portion of the tip and the heart valve assembly being positioned between the protective shield and the elongated catheter, and a second open position with the protective shield being sufficiently spaced from the heart valve assembly to permit expansion of the heart valve assembly; and
wherein the stop is positioned on the elongated catheter and sized such that at the first dosed position the stop abuts a distal end of the sheath to stop motion of the sheath and the protective shield relative to the elongated catheter and to prevent the protective shield from overlapping the tip.
2 Assignments
0 Petitions
Accused Products
Abstract
A system for percutaneously inserting a prosthesis containing a biological replacement for a defective valve into an implantation site through a body lumen. The system contains a balloon catheter upon which a collapsable stent containing a venous valvular replacement is mounted. A protective shield is slidably mounted upon the catheter that is movable between a closed position over the balloon and an open position wherein the balloon can be inflated to expand the stent. A central lumen runs through the catheter that is formed of stainless steel. The central lumen provides a one to one torque ratio between the proximal end of the catheter and the distal end to enhance the steerability of the catheter. The vein of the replacement is reduced in thickness between 50% and 90% of its original size thereby considerably reducing the size of the replacement package when the stem is collapsed upon the balloon of the catheter.
247 Citations
10 Claims
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1. A delivery system for percutaneously implanting a heart valve assembly at an implantation site within a patient, the delivery system comprising:
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an elongated catheter; a stop on the elongated catheter; a tip at a distal end of the elongated catheter; a sheath configured to slidably receive the elongated catheter; and a protective shield at a distal end of the sheath; wherein the sheath and protective shield are moveable relative to the elongated catheter and the stop between a first dosed position with a distal end portion of the protective shield being engaged with a proximal end portion of the tip and the heart valve assembly being positioned between the protective shield and the elongated catheter, and a second open position with the protective shield being sufficiently spaced from the heart valve assembly to permit expansion of the heart valve assembly; and wherein the stop is positioned on the elongated catheter and sized such that at the first dosed position the stop abuts a distal end of the sheath to stop motion of the sheath and the protective shield relative to the elongated catheter and to prevent the protective shield from overlapping the tip. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification