US20150127032A1
Active / In Force
US
⏱️ 7.9 years remaining
Looped Wire Catheter And Method
Assignee: Cook Medical Technologies LLC
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Filing: 2014-09-29
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Granted: —
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Expires: 2034-09-29
Abstract
Abstract A catheter includes a catheter body defining first and second lumens, and a wire having first and second segments each with a greater stiffness, and a middle segment with a lesser stiffness. The wire is in an elastically deformed access state where the middle segment extends from an opening to the first lumen to an opening to the second lumen and forms a smaller loop. The wire is adjustable via sliding the first and second segments in opposed directions to an elastically deformed treatment state where the first segment extends from the opening to the first lumen to the opening to the second lumen and forms a larger loop.
Inventors
- 👤 David C. Lentz
- 👤 Thomas A. Kay, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 15:30
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/3207; A61B17/320708; A61B2017/320733; A61B17/320758; A61B2017/320775; A61M; A61M25/00; A61M25/0043; A61M25/005
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
158 words
1 . A catheter comprising: an elongate catheter body defining a first lumen and a second lumen each longitudinally extending between a proximal end and a distal end of the elongate catheter body and including a first lumen opening and a second lumen opening, respectively, in the distal end; a wire including a first segment and a second segment each having a greater stiffness and slidable in opposed directions through the first lumen and the second lumen, respectively, and a middle segment having a lesser stiffness; and the wire being in an elastically deformed access state where the middle segment extends from the first lumen opening to the second lumen opening and forms a smaller loop projecting from the distal end, and being adjustable via the sliding to an elastically deformed treatment state where the first segment extends from the first lumen opening to the second lumen opening and forms a larger loop projecting from the distal end.
Claim 2
Dependent Claim
158 words
1 . A catheter comprising: an elongate catheter body defining a first lumen and a second lumen each longitudinally extending between a proximal end and a distal end of the elongate catheter body and including a first lumen opening and a second lumen opening, respectively, in the distal end; a wire including a first segment and a second segment each having a greater stiffness and slidable in opposed directions through the first lumen and the second lumen, respectively, and a middle segment having a lesser stiffness; and the wire being in an elastically deformed access state where the middle segment extends from the first lumen opening to the second lumen opening and forms a smaller loop projecting from the distal end, and being adjustable via the sliding to an elastically deformed treatment state where the first segment extends from the first lumen opening to the second lumen opening and forms a larger loop projecting from the distal end.
Claim 3
Dependent Claim
26 words
2 . The catheter of claim 1 wherein the wire includes a one-piece wire formed of a shape memory material having a uniform elastic limit throughout.
Claim 4
Dependent Claim
36 words
3 . The catheter of claim 2 wherein the first segment and the second segment each define a bend radius of plastic deformation, and the smaller loop defines a loop radius less than the bend radius.
Claim 5
Dependent Claim
39 words
4 . The catheter of claim 3 wherein the elongate catheter body defines an outer diameter body dimension, and the smaller loop defines an outer diameter loop dimension equal to about twice the outer diameter body dimension, or less.
Claim 6
Dependent Claim
35 words
5 . The catheter of claim 1 wherein each of the first and second segments is longer and has a greater cross-sectional area, and the middle segment is shorter and has a reduced cross-sectional area.
Claim 7
Dependent Claim
30 words
6 . The catheter of claim 3 wherein each of the first and second segments includes a circular cross-sectional shape, and the middle segment has a concentric circular cross-sectional shape.
Claim 8
Dependent Claim
15 words
7 . The catheter of claim 1 further comprising a reinforcement within the distal end.
Claim 9
Dependent Claim
43 words
8 . The catheter of claim 7 wherein the distal end includes a distal tip, and the reinforcement extends circumferentially around each of the first and second lumens, and longitudinally through the elongate catheter body from the proximal end to the distal tip.
Claim 10
Dependent Claim
13 words
9 . The catheter of claim 7 wherein the reinforcement includes a braid.
Claim 11
Dependent Claim
33 words
10 . The catheter of claim 7 wherein the elongate catheter body defines a third lumen extending in parallel with each of the first and second lumens and opening at the distal end.
Claim 12
Dependent Claim
23 words
11 . The catheter of claim 1 further comprising a split prevention reinforcement mounted at the distal end of the elongate catheter body.
Claim 13
Dependent Claim
24 words
12 . The catheter of claim 11 wherein the split prevention reinforcement includes a band mounted around the distal end of elongate catheter body.
Claim 14
Dependent Claim
113 words
13 . A method of deploying a catheter for treatment of a patient comprising the steps of: sliding first and second greater stiffness segments of a wire in opposed directions through first and second longitudinally extending lumens in a catheter; positioning the first segment via the sliding in place of a lesser stiffness middle segment of the wire extending between the first and second lumens; and adjusting the wire via the positioning from an elastically deformed access state where the middle segment forms a smaller loop projecting from a distal end of the catheter to an elastically deformed treatment state where the first segment forms a larger loop projecting from the distal end.
Claim 15
Dependent Claim
113 words
13 . A method of deploying a catheter for treatment of a patient comprising the steps of: sliding first and second greater stiffness segments of a wire in opposed directions through first and second longitudinally extending lumens in a catheter; positioning the first segment via the sliding in place of a lesser stiffness middle segment of the wire extending between the first and second lumens; and adjusting the wire via the positioning from an elastically deformed access state where the middle segment forms a smaller loop projecting from a distal end of the catheter to an elastically deformed treatment state where the first segment forms a larger loop projecting from the distal end.
Claim 16
Dependent Claim
33 words
14 . The method of claim 13 further comprising a step of relieving a load on the middle segment and applying a load to the first segment, via the adjusting of the wire.
Claim 17
Dependent Claim
39 words
15 . The method of claim 14 further comprising a step of impinging the loaded middle segment and loaded first segment upon inner walls of the catheter defining the first and second lumens during the adjusting of the wire.
Claim 18
Dependent Claim
31 words
16 . The method of claim 15 further comprising a step of limiting penetration of the impinging middle and first segments through the catheter via a reinforcement in the distal end.
Claim 19
Dependent Claim
44 words
17 . The method of claim 13 further comprising a step of guiding the catheter prior to deployment through a body lumen in a patient via a wire guide extending through a third, working lumen extending in parallel with the first and second lumens.
Claim 20
Dependent Claim
38 words
18 . The method of claim 17 further comprising a step of cutting material within the body lumen via a leading edge of the larger loop so as to restore a flow of blood through the body lumen.
Claim 21
Dependent Claim
45 words
19 . The method of claim 18 further comprising a step of transmitting a torque applied to a proximal end of the catheter to the distal end via a braid within the catheter so as to cut the material via rotation of the larger loop.
Claim 22
Dependent Claim
26 words
20 . The method of claim 18 further comprising a step of removing cut material from the body lumen via suction applied to the working lumen.
References Cited (Backward Citations)
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