Catheter device
First Claim
1. A catheter device comprising:
- a shaft that extends from a proximal end to a distal end to carry on its distal end a a medical implant for intraluminal advance on a guidewire and delivery of the medical implant to a treatment site, the shaft defining a flushing lumen and a proximal guidewire exit port that is distal of the proximal end of the shaft for rapid exchange of the catheter with respect to the guidewire;
a sheath that lies radially outside the medical implant in the catheter that is proximally withdrawn from the medical implant;
a first shaft element including at least one of a pull wire and a rod to pull the sheath proximally; and
a second shaft element including a pusher tube to push the medical implant distally to prevent the medical implant from moving proximally with the sheath when the sheath is pulled proximally by the first shaft element.
1 Assignment
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Accused Products
Abstract
A catheter device having a shaft that extends from a proximal end to a distal end to carry on its distal end a self expanding implant for intraluminal advance on a guidewire and delivery of the implant to a stenting site by proximal withdrawal of a sheath that lies radially outside the implant in the catheter, the catheter including a first shaft element to pull the sheath proximally and a second shaft element to push the implant distally to prevent the implant moving proximally with the sheath when the sheath is pulled proximally, wherein i) the shaft defines a flushing lumen ii) the shaft defines a proximal guidewire exit port that is distal of the proximal end of the shaft, for rapid exchange of the catheter with respect to the guidewire in) the first shaft element is a pull wire iv) the second shaft element is a pusher tube
215 Citations
21 Claims
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1. A catheter device comprising:
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a shaft that extends from a proximal end to a distal end to carry on its distal end a a medical implant for intraluminal advance on a guidewire and delivery of the medical implant to a treatment site, the shaft defining a flushing lumen and a proximal guidewire exit port that is distal of the proximal end of the shaft for rapid exchange of the catheter with respect to the guidewire;
a sheath that lies radially outside the medical implant in the catheter that is proximally withdrawn from the medical implant;
a first shaft element including at least one of a pull wire and a rod to pull the sheath proximally; and
a second shaft element including a pusher tube to push the medical implant distally to prevent the medical implant from moving proximally with the sheath when the sheath is pulled proximally by the first shaft element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20)
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19. Method of manipulating a self-expanding stent comprising:
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loading the stent into a rapid exchange transluminal stent delivery catheter system; and
pulling on a pull wire to pull proximally relative to the stent a sheath that lies radially outside the stent to release the stent.
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21. Method of placing a self-expanding stent comprising:
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taking a catheter having a shaft defining a flushing lumen and a proximal guidewire exit port, a sheath that lies radially outside the shaft, a pull wire to pull the sheath and a pusher tube partially disposed in the sheath;
advancing it to a stenting site along a guidewire;
pulling on the pull wire to release the stent; and
withdrawing the catheter and guidewire after release of the stent from the catheter.
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Specification