US20030114869A1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intravascular system for occluded blood vessels and guidewire for use therein
Assignee: DSM Biomedical Inc
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Filing: 2003-01-31
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Granted: —
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Expires: 2023-01-31
Abstract
Abstract A system and method for opening a lumen in an occluded blood vessel, e.g., a coronary bypass graft, of a living being. The system comprises an atherectomy catheter having a working head, e.g., a rotary impacting impeller, and a debris extraction sub-system. The atherectomy catheter is located within a guide catheter. The working head is arranged to operate on, e.g., impact, the occlusive material in the occluded vessel to open a lumen therein, whereupon some debris may be produced. The debris extraction sub-system introduces an infusate liquid at a first flow rate adjacent the working head and withdraws that liquid and some blood at a second and higher flow rate, through the guide catheter to create a differential flow adjacent the working head, whereupon the debris is withdrawn in the infusate liquid and blood for collection outside the being's body. The introduction of the infusate liquid may also be used to establish an unbalanced flow adjacent the working head to enable the atherectomy catheter to be steered hydrodynamically. A guide wire having an inflatable balloon on its distal end may be used with the atherectomy catheter to block the flow of debris distally, while enabling distal tissues to be perfused with an oxygenating liquid. At least one flow control port may be provided in the guide catheter to prevent collapse of the vessel being revascularized. A cradle is provided to fix the guide catheter and guide wire in position within the body of the being while enabling the atherectomy catheter to be advanced along the guide wire and through the guide catheter. The guide catheter includes a wear resistant coating and is constructed so that its distal end includes plural sections of different outside diameters, with the distal most section being of the smallest outside diameter. A control console is provided to establish various modes of operation of the system based on manual inputs via switches or voice commands via voice recognition circuitry. A video panel displays the various modes of operation and instructions to the operator.
Inventors
- 👤 John Nash
- 👤 William Fisher
- 👤 Charles Dodson
- 👤 John Henderson
- 👤 Joseph Kaufmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:04
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/3207; A61B17/320758; A61M; A61M1/00; A61M1/71; A61M1/77; A61B2017/00831; A61B2017/0084; A61B2017/00845; A61B2017/00853; A61B17/22; A61B2017/22038; A61B2217/00; A61B2217/002; A61B2217/005; A61B2217/007
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
109 words
1 . A tubular guidewire for use in an intravascular system for opening a lumen in an occluded blood vessel portion of a living being's vascular system, the occluded blood vessel portion being occluded by an occlusive material and being located downstream of a patent blood vessel portion, the intravascular system comprising a rotary atherectomy instrument having a rotary working head, the instrument being arranged to be mounted on said guidewire and moved with respect thereto so that the working head is located adjacent the occlusive material, said guidewire having a wear resistant coating for reducing wear on the guidewire resulting from the rotation of the rotating working head.
Claim 2
Dependent Claim
109 words
1 . A tubular guidewire for use in an intravascular system for opening a lumen in an occluded blood vessel portion of a living being's vascular system, the occluded blood vessel portion being occluded by an occlusive material and being located downstream of a patent blood vessel portion, the intravascular system comprising a rotary atherectomy instrument having a rotary working head, the instrument being arranged to be mounted on said guidewire and moved with respect thereto so that the working head is located adjacent the occlusive material, said guidewire having a wear resistant coating for reducing wear on the guidewire resulting from the rotation of the rotating working head.
Claim 3
Dependent Claim
16 words
2 . The tubular guidewire of claim 1 wherein said wear resistant coating is chromium plate.
Claim 4
Dependent Claim
16 words
3 . The tubular guidewire of claim 1 wherein said wear resistant coating is Titanium nitride.
Claim 5
Dependent Claim
56 words
4 . A wear resistant coating for a tubular guidewire for deployment in the body of a living being wherein the guidewire in bent during its deployment, said wear resistant coating having properties to prevent the flaking thereof when the guidewire is bent to a small radius on the order of approximately 0.375 inch (9.5 mm).
Claim 6
Dependent Claim
56 words
4 . A wear resistant coating for a tubular guidewire for deployment in the body of a living being wherein the guidewire in bent during its deployment, said wear resistant coating having properties to prevent the flaking thereof when the guidewire is bent to a small radius on the order of approximately 0.375 inch (9.5 mm).
Claim 7
Dependent Claim
108 words
5 . A tubular guidewire for use in an intravascular system for opening a lumen in an occluded blood vessel portion of a living being's vascular system, the intravascular system comprising an instrument for opening the lumen in the occluded blood vessel portion and being arranged to be guided to a desired position by said guide wire, said guide wire being arranged to be bent during its deployment within the being's vascular system and having a wear resistant coating, said wear resistant coating having properties to prevent the flaking thereof when the guidewire is bent to a small radius on the order of approximately 0.375 inch (9.5 mm).
Claim 8
Dependent Claim
108 words
5 . A tubular guidewire for use in an intravascular system for opening a lumen in an occluded blood vessel portion of a living being's vascular system, the intravascular system comprising an instrument for opening the lumen in the occluded blood vessel portion and being arranged to be guided to a desired position by said guide wire, said guide wire being arranged to be bent during its deployment within the being's vascular system and having a wear resistant coating, said wear resistant coating having properties to prevent the flaking thereof when the guidewire is bent to a small radius on the order of approximately 0.375 inch (9.5 mm).
Claim 9
Dependent Claim
119 words
6 . A tubular guidewire for use in an intravascular system for opening a lumen in an occluded blood vessel portion of a living being's vascular system, the occluded blood vessel portion being occluded by an occlusive material and being located downstream of a patent blood vessel portion, the intravascular system comprising a rotary atherectomy instrument having a rotary working head, the instrument being arranged to be mounted on said guidewire and moved with respect thereto so that the working head is located adjacent the occlusive material, said guidewire having a wear resistant coating having properties to prevent the flaking thereof when the guidewire is bent to a small radius on the order of approximately 0.375 inch (9.5 mm).
Claim 10
Dependent Claim
119 words
6 . A tubular guidewire for use in an intravascular system for opening a lumen in an occluded blood vessel portion of a living being's vascular system, the occluded blood vessel portion being occluded by an occlusive material and being located downstream of a patent blood vessel portion, the intravascular system comprising a rotary atherectomy instrument having a rotary working head, the instrument being arranged to be mounted on said guidewire and moved with respect thereto so that the working head is located adjacent the occlusive material, said guidewire having a wear resistant coating having properties to prevent the flaking thereof when the guidewire is bent to a small radius on the order of approximately 0.375 inch (9.5 mm).
Claim 11
Dependent Claim
37 words
7 . A wear resistant coating for a tubular guidewire for deployment in the body of a living being wherein the guidewire in bent during its deployment, said wear resistant coating being harder than 58 Rockwell C.
Claim 12
Dependent Claim
37 words
7 . A wear resistant coating for a tubular guidewire for deployment in the body of a living being wherein the guidewire in bent during its deployment, said wear resistant coating being harder than 58 Rockwell C.
Claim 13
Dependent Claim
19 words
8 . The wear resistant coating of claim 7 wherein said coating is thinner than 0.001 in (0.0254 mm).
Claim 14
Dependent Claim
89 words
9 . A tubular guidewire for use in an intravascular system for opening a lumen in an occluded blood vessel portion of a living being's vascular system, the intravascular system comprising an instrument for opening the lumen in the occluded blood vessel portion and being arranged to be guided to a desired position by said guide wire, said guide wire being arranged to be bent during its deployment within the being's vascular system and having a wear resistant coating, said wear resistant coating being harder than 58 Rockwell C.
Claim 15
Dependent Claim
89 words
9 . A tubular guidewire for use in an intravascular system for opening a lumen in an occluded blood vessel portion of a living being's vascular system, the intravascular system comprising an instrument for opening the lumen in the occluded blood vessel portion and being arranged to be guided to a desired position by said guide wire, said guide wire being arranged to be bent during its deployment within the being's vascular system and having a wear resistant coating, said wear resistant coating being harder than 58 Rockwell C.
Claim 16
Dependent Claim
19 words
10 . The wear resistant coating of claim 9 wherein said coating is thinner than 0.001 in (0.0254 mm).
Claim 17
Dependent Claim
112 words
11 . A guidewire for use in an intravascular system for opening a lumen in an occluded blood vessel portion of a living being's vascular system, the occluded blood vessel portion being occluded by an occlusive material and being located downstream of a patent blood vessel portion, the intravascular system comprising a rotary atherectomy instrument having a rotary working head, the instrument being arranged to be mounted on said guidewire and moved with respect thereto so that the working head is located adjacent the occlusive material, said guidewire having more than one coating, one of said coatings having wear resistant properties and another of said coatings having a low coefficient of friction.
Claim 18
Dependent Claim
112 words
11 . A guidewire for use in an intravascular system for opening a lumen in an occluded blood vessel portion of a living being's vascular system, the occluded blood vessel portion being occluded by an occlusive material and being located downstream of a patent blood vessel portion, the intravascular system comprising a rotary atherectomy instrument having a rotary working head, the instrument being arranged to be mounted on said guidewire and moved with respect thereto so that the working head is located adjacent the occlusive material, said guidewire having more than one coating, one of said coatings having wear resistant properties and another of said coatings having a low coefficient of friction.
Claim 19
Dependent Claim
38 words
12 . The guidewire of claim 11 wherein said low coefficient of friction coating is located on a proximal portion of said guide wire and said wear resistant coating is located on a distal portion of said guidewire.
Claim 20
Dependent Claim
145 words
13 . An intravascular system for use by an operator to open a lumen in an occluded blood vessel portion of a living being's vascular system, the occluded blood vessel portion being occluded by an occlusive material, said intravascular system comprising an instrument for opening a lumen in the occlusive material and a control system, said instrument being arranged to be extended into the blood vessel portion to a position adjacent the occlusive material in the interior of the occluded blood vessel portion to open a lumen therein for the flow of blood therethrough under the control of said control system, said control system enabling plural modes of operation of said instrument and comprising a display and means for accepting an audio command regarding a mode of operation to be accomplished from the operator and for visually displaying that mode of operation on said display.
Claim 21
Dependent Claim
145 words
13 . An intravascular system for use by an operator to open a lumen in an occluded blood vessel portion of a living being's vascular system, the occluded blood vessel portion being occluded by an occlusive material, said intravascular system comprising an instrument for opening a lumen in the occlusive material and a control system, said instrument being arranged to be extended into the blood vessel portion to a position adjacent the occlusive material in the interior of the occluded blood vessel portion to open a lumen therein for the flow of blood therethrough under the control of said control system, said control system enabling plural modes of operation of said instrument and comprising a display and means for accepting an audio command regarding a mode of operation to be accomplished from the operator and for visually displaying that mode of operation on said display.
Claim 22
Dependent Claim
20 words
14 . The intravascular system of claim 13 wherein said means for accepting an audio command comprises voice recognition means.
Claim 23
Dependent Claim
26 words
15 . The intravascular system of claim 13 comprising a means for providing instructions for continuing use of said system to the operator by said display.
Claim 24
Dependent Claim
25 words
16 . The intravascular system of claim 13 wherein said control system is arranged to accept manual inputs thereto to establish said mode of operation.
Claim 25
Dependent Claim
21 words
17 . The intravascular system of claim 16 wherein said display displays information about the mode selected by said manual inputs.
Claim 26
Dependent Claim
26 words
18 . The intravascular system of claim 17 comprising a means for providing instructions for continuing use of said system to the operator by said display.
Claim 27
Dependent Claim
12 words
19 . The guidewire of claim 11 wherein said guidewire is tubular.
Claim 28
Dependent Claim
12 words
20 . The guidewire of claim 12 wherein said guidewire is tubular.
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