Endoluminal prosthesis placing method
First Claim
1. A catheter assembly comprising:
- a catheter comprising first and second rotatable, telescoping shafts having first and second prosthesis portion holders, respectively;
an endoluminal prosthesis, capable of assuming a second, expanded-diameter state from a first, reduced-diameter state; and
the prosthesis having first and second prosthesis portions releasably engageable with the first and second prosthesis portion holders, respectively.
8 Assignments
0 Petitions
Accused Products
Abstract
A catheter assembly includes a coiled endoluminal prosthesis (122, 190, 198) and a catheter (136) having at least first and second telescoping shafts (138, 140, 142). The prosthesis is releasably engaged to the distal ends (144, 146, 148) of the telescoping shafts. The prosthesis is capable of assuming a second, expanded diameter state from a first, reduced diameter state. The length and number of turns (128) of the coiled prosthesis can be changed by the relative translation and rotation of the shafts. The catheter assembly is especially useful for placing a coiled stent graft (122), in which one turn (132, 134) of the prosthesis has a greater pitch than the adjacent turns, at the intersection (184) of a bifurcation within a blood vessel (182). Remotely viewable marker elements (188, 190, 191, 192, 193, 195, 197) may be used and include a marker element (193, 190A, 197) configured to indicate orientation as well as axial position of the prosthesis. The ends of the prosthesis may be substantially less stiff than the remainder of the prosthesis and/or shaped to help prevent tissue trauma.
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Citations
40 Claims
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1. A catheter assembly comprising:
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a catheter comprising first and second rotatable, telescoping shafts having first and second prosthesis portion holders, respectively;
an endoluminal prosthesis, capable of assuming a second, expanded-diameter state from a first, reduced-diameter state; and
the prosthesis having first and second prosthesis portions releasably engageable with the first and second prosthesis portion holders, respectively. - 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, 25, 26, 27, 28)
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29. A catheter assembly comprising:
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a catheter comprising first and second rotatable, telescoping shafts having first and second prosthesis portion holders, respectively, said first shaft being a tubular shaft housing said second shaft therein;
a coiled endoluminal prosthesis, having a plurality of turns and a generally helical gap defined between said turns, capable of assuming a second, expanded-diameter state from a first, reduced-diameter state;
the prosthesis having first and second prosthesis portions releasably engageable with the first and second prosthesis portion holders, respectively;
whereby the length and the number of turns of the coiled endoluminal prosthesis can be changed by relative longitudinal and rotary motion of the shafts.
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30. A method for placing an endoluminal prosthesis within a body comprising:
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introducing the distal portion of a catheter assembly at a chosen position within a body, the distal catheter portion comprising a coiled endoluminal prosthesis would about a catheter shaft, the prosthesis having a plurality of turns and being capable of assuming a second, expanded-diameter state from a first, reduced-diameter state, said turns having spaces therebetween when in the second state, the pitch of at least one turn being greater than the pitch of adjacent turns when in the second state, the prosthesis releasably connected to the catheter shaft at a first position along the prosthesis at the at least one turn and at a second position along the prosthesis, the second position being spaced-apart from the first position;
locating said at least one turn at an intersection of a first vessel and a branching vessel;
releasing the prosthesis from the catheter;
maintaining the first position of the prosthesis at the intersection; and
the locating and maintaining steps being carried out so to keep the intersection substantially unobstructed to enhance fluid flow between the first and branching vessels with the prosthesis in its second, expanded-diameter state. - View Dependent Claims (31, 32, 33, 34, 35, 36)
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37. A method for placing an endoluminal prosthesis within a body comprising:
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introducing the distal portion of a catheter assembly at a chosen position within a body, the distal catheter portion comprising a coiled endoluminal prosthesis wound about first and second rotatable, telescoping shafts, the prosthesis having a plurality of turns and being capable of assuming a second, expanded-diameter state from a first, reduced-diameter state, said turns having spaces therebetween when in the second state, the prosthesis releasably connected to the first and second shafts at first and second positions along the prosthesis, the second position being spaced-apart from the first position;
locating said prosthesis at a target site;
selectively adjusting the number of turns of the prosthesis by rotating at least one of the shafts relative to one another;
selectively adjusting the length of the prosthesis by longitudinally moving at least one of the shafts relative to one another;
releasing the prosthesis from the shafts; and
removing the shafts from the body. - View Dependent Claims (38, 39, 40)
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Specification