Minimization of stent-graft migration during implantation
First Claim
1. Apparatus comprising an endovascular system, which comprises:
- an endovascular implant, which is configured to assume a radially-compressed delivery state, and a radially-expanded deployment state; and
a delivery tool, which comprises;
a proximal main delivery catheter, having a distal portion in which the endovascular implant is disposed while in the radially-compressed delivery state; and
a distal restraining assembly, which (a) comprises (i) a restraining-assembly tubular shaft, wherein a proximal end of the restraining-assembly tubular shaft is disposed distal to the proximal main delivery catheter, and wherein the restraining-assembly tubular shaft is shaped so as to define one or more longitudinal elongated-member lumens therethrough, and (ii) one or more flexible elongated members, which extend from the proximal end of the restraining-assembly tubular shaft, and (b) is configured to assume;
an engaged state, in which (a) the distal restraining assembly prevents proximal displacement of the endovascular implant relative to the distal restraining assembly, and (b) the one or more flexible elongated members are slidably disposed through the one or more longitudinal elongated-member lumens and releasably couple an element of the endovascular system to a distal portion of the endovascular implant, the element selected from the group consisting of;
the distal restraining assembly and the restraining-assembly tubular shaft, anda disengaged state, in which the distal restraining assembly allows proximal displacement of the endovascular implant relative to the distal restraining assembly.
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Accused Products
Abstract
An endovascular system (10) includes an endovascular implant (20) and a delivery tool (30). The implant (20) is configured to assume a radially-compressed delivery state, and a radially-expanded deployment state. The delivery tool (30) includes a proximal main delivery catheter (36), having a distal portion (46) in which the implant (20) is disposed while in the radially-compressed delivery state; and a distal restraining assembly (50), which includes a restraining-assembly tubular shaft (52) disposed distal to the proximal main delivery catheter (36). The distal restraining assembly (50) is configured to assume an engaged state, in which the distal restraining assembly (50) prevents proximal displacement of the implant (20) relative to the distal restraining assembly (50), and a disengaged state, in which the distal restraining assembly (50) allows proximal displacement of the implant (20) relative to the distal restraining assembly (50). Other embodiments are also described.
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Citations
33 Claims
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1. Apparatus comprising an endovascular system, which comprises:
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an endovascular implant, which is configured to assume a radially-compressed delivery state, and a radially-expanded deployment state; and a delivery tool, which comprises; a proximal main delivery catheter, having a distal portion in which the endovascular implant is disposed while in the radially-compressed delivery state; and a distal restraining assembly, which (a) comprises (i) a restraining-assembly tubular shaft, wherein a proximal end of the restraining-assembly tubular shaft is disposed distal to the proximal main delivery catheter, and wherein the restraining-assembly tubular shaft is shaped so as to define one or more longitudinal elongated-member lumens therethrough, and (ii) one or more flexible elongated members, which extend from the proximal end of the restraining-assembly tubular shaft, and (b) is configured to assume; an engaged state, in which (a) the distal restraining assembly prevents proximal displacement of the endovascular implant relative to the distal restraining assembly, and (b) the one or more flexible elongated members are slidably disposed through the one or more longitudinal elongated-member lumens and releasably couple an element of the endovascular system to a distal portion of the endovascular implant, the element selected from the group consisting of;
the distal restraining assembly and the restraining-assembly tubular shaft, anda disengaged state, in which the distal restraining assembly allows proximal displacement of the endovascular implant relative to the distal restraining assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method comprising:
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providing (a) an endovascular implant and (b) a delivery tool which includes (i) a proximal main delivery catheter and (ii) a distal restraining assembly, which includes (A) a restraining-assembly tubular shaft, wherein a proximal end of the restraining-assembly tubular shaft is disposed distal to the proximal main delivery catheter, and wherein the restraining-assembly tubular shaft is shaped so as to define one or more longitudinal elongated-member lumens therethrough, and (B) one or more flexible elongated members, which extend from the proximal end of the restraining-assembly tubular shaft; endovascularly introducing the delivery tool into vasculature of a patient through a first vascular access site, while the endovascular implant is disposed in a radially-compressed delivery state within a distal portion of the proximal main delivery catheter, and while the distal restraining assembly is in an engaged state with the endovascular implant, in which state (a) the distal restraining assembly prevents proximal displacement of the endovascular implant relative to the distal restraining assembly, and (b) the one or more flexible elongated members are slidably disposed through the one or more longitudinal elongated-member lumens and releasably couple an element of the endovascular system to a distal portion of the endovascular implant, the element selected from the group consisting of;
the distal restraining assembly and the restraining-assembly tubular shaft;advancing the delivery tool through the vasculature until a distal end of the restraining-assembly tubular shaft exits the vasculature and a body of the patient through a second vascular access site, including passing the flexible elongated members through the second vascular access site together with the distal end of the restraining-assembly tubular shaft, such that the flexible elongated members are accessible from outside the body of the patient; releasing the endovascular implant from the proximal main delivery catheter, such that the endovascular implant transitions to a radially-expanded deployment state in the vasculature; thereafter, transitioning the distal restraining assembly to a disengaged state, in which state the distal restraining assembly does not engage the endovascular implant and allows proximal displacement of the endovascular implant relative to the distal restraining assembly; and thereafter, extracting the distal restraining assembly from the vasculature and the body of the patient through the second vascular access site. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33)
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Specification