Patent EP0594201A2 successfully refreshed from Google Patents.
EP0594201A2
Expired / Lapsed
EP
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Catheter tube and method of manufacturing the tube
Assignee: Terumo Corp
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Filing: 1993-10-22
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Granted: —
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Expires: 2013-10-22
Abstract
Abstract A catheter tube is composed of a main portion 22 and a tip portion 23. The main portion 22 of the catheter tube is of such a structure that an inner tube 4 and an outer tube 6 are joined via a reinforcing material layer 5, but the tip portion 23 is of such a structure that only the inner tube 4 and the outer tube 6 are joined without intervening the reinforcing material layer 5 between the two tubes. The reinforcing material layer 5 is formed by arranging a filamentous element (e.g., stainless steel wire) 51 around the inner tube in a lattice manner. The inclination angles ϑ1, ϑ2 and ϑ3 of the filamentous element 51 with respect to the axis of the catheter tube at the first, second and third regions 221, 222 and 223, respectively are determined so as to establish the relationship as ϑ1 < ϑ2 < ϑ3. Therefore, the rigidity of the catheter 2 can be increased in accordance with the decrease of the inclination angle of the filamentous element 51. According to the catheter tube, excellent pushing, torque transmission, follow-up to a guide wire, and kink-resistant characteristics can be attained, simultaneously and respectively.
Inventors
- 👤 Naofumi c/o Terumo Kabushiki Kaisha Okajima
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 18:35
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0009; A61M25/0012; A61M25/0043; A61M25/0045; A61M25/005; A61M25/0053; A61M25/0054
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
150 words
A catheter tube having a longitudinal axis, comprising: a flexible inner tube; a flexible outer tube provided around said inner tube; and a reinforcing material layer disposed between said inner and outer tubes, wherein said reinforcing material layer is formed by arranging at least one filamentous element in a lattice manner in such a way that inclination angles of the filamentous element with respect to the axis of the catheter tube change continuously or in a stepwise manner along the axial direction so as to form one section thereof in which the inclination angle is relatively large and another section thereof in which the inclination angle is relatively small, whereby bending rigidity of the catheter tube at which said one section of said reinforcing material layer is located is smaller in comparison with that of the catheter tube at which said another section of said reinforcing material layer is located.
Claim 2
Dependent Claim
44 words
The catheter tube as claimed in claim 1, wherein said reinforcing material layer has a front side and a rear side, in which said one section of said reinforcing material layer is located at least at the front side of said reinforcing material layer.
Claim 3
Dependent Claim
35 words
The catheter tube as claimed in claim 2, wherein said catheter tube has a tip portion and said reinforcing material layer is arranged on the catheter tube, except the tip portion of the catheter tube.
Claim 4
Dependent Claim
45 words
The catheter tube as claimed in claim 3, wherein said reinforcing material layer has a tip portion, and an outer diameter of said outer tube or an inner or outer diameter of said inner tube changes near the tip portion of said reinforcing material layer.
Claim 5
Dependent Claim
20 words
The catheter tube as claimed in claim 4, wherein said inner and outer tubes are formed of the same material.
Claim 6
Dependent Claim
20 words
The catheter tube as claimed in claim 4, wherein at least said outer tube is formed of a soft material.
Claim 7
Dependent Claim
20 words
The catheter tube as claimed in claim 3, wherein said inner and outer tubes are formed of the same material.
Claim 8
Dependent Claim
20 words
The catheter tube as claimed in claim 3, wherein at least said outer tube is formed of a soft material.
Claim 9
Dependent Claim
20 words
The catheter tube as claimed in claim 2, wherein said inner and outer tubes are formed of the same material.
Claim 10
Dependent Claim
20 words
The catheter tube as claimed in claim 2, wherein at least said outer tube is formed of a soft material.
Claim 11
Dependent Claim
34 words
The catheter tube as claimed in claim 1, wherein said catheter tube has a tip portion, and said reinforcing material layer is arranged on the catheter tube, except the tip portion the catheter tube.
Claim 12
Dependent Claim
44 words
The catheter tube as claimed in claim 11, wherein said reinforcing material layer has a tip portion, and an outer diameter of said outer tube or an inner or outer diameter of said inner tube changes near the tip of said reinforcing material layer.
Claim 13
Dependent Claim
20 words
The catheter tube as claimed in claim 12, wherein said inner and outer tubes are formed of the same material.
Claim 14
Dependent Claim
20 words
The catheter tube as claimed in claim 12, wherein at least said outer tube is formed of a soft material.
Claim 15
Dependent Claim
20 words
The catheter tube as claimed in claim 11, wherein said inner and outer tubes are formed of the same material.
Claim 16
Dependent Claim
20 words
The catheter tube as claimed in claim 11, wherein at least said outer tube is formed of a soft material.
Claim 17
Dependent Claim
20 words
The catheter tube as claimed in claim 1, wherein said inner and outer tubes are formed of the same material.
Claim 18
Dependent Claim
20 words
The catheter tube as claimed in claim 1, wherein at least said outer tube is formed of a soft material.
Claim 19
Dependent Claim
46 words
The catheter tube as claimed in one of claims 5, 6, 7, 8, 9, 10, 13, 14, 15, 16, 17 and 18, wherein said catheter tube has an outer surface thereof, and the outer surface of said catheter tube is covered with a hydrophilic high-molecular substance.
Claim 20
Dependent Claim
167 words
A catheter tube having a longitudinal axis, comprising: a flexible inner tube; a flexible outer tube provided around said inner tube; and a reinforcing material layer disposed between said inner and outer tubes, wherein said reinforcing material layer is formed by arranging at least one filamentous element in a lattice manner in such a way that intervals of the lattice points of said filamentous element along with the axial direction of the catheter tube change continuously or in a stepwise manner along the axial direction of the catheter tube so as to form one section thereof in which the respective interval between the lattice points of the filamentous element is relatively small and another section thereof in which the respective interval between the lattice points of the filamentous element is relatively large, whereby bending rigidity of the catheter tube at which said one section of said reinforcing material layer is located is smaller than that at which said another section of said reinforcing material layer is located.
Claim 21
Dependent Claim
40 words
The catheter tube as claimed in claim 20, wherein said reinforcing material layer has a front side and a rear side, in which said one section of said reinforcing material layer is located at least at the front side thereof.
Claim 22
Dependent Claim
32 words
The catheter tube as claimed in claim 21, wherein said catheter tube has a tip portion and said reinforcing material layer is arranged on the catheter tube, except the tip portion thereof.
Claim 23
Dependent Claim
45 words
The catheter tube as claimed in claim 22, wherein said reinforcing material layer has a tip portion and an outer diameter of said outer tube or an inner or outer diameter of said inner tube changes near the tip portion of said reinforcing material layer.
Claim 24
Dependent Claim
20 words
The catheter tube as claimed in claim 23, wherein said inner and outer tubes are formed of the same material.
Claim 25
Dependent Claim
32 words
The catheter tube as claimed in claim 24, wherein said catheter tube has an outer surface thereof, and the outer surface of said catheter tube is covered with a hydrophilic high-molecular substance.
Claim 26
Dependent Claim
20 words
The catheter tube as claimed in claim 23, wherein at least said outer tube is formed of a soft material.
Claim 27
Dependent Claim
32 words
The catheter tube as claimed in claim 26, wherein said catheter tube has an outer surface thereof, and the outer surface of said catheter tube is covered with a hydrophilic high-molecular substance.
Claim 28
Independent Claim
147 words
A method of manufacturing catheter tube by forming a reinforcing material layer on an outer circumference of a flexible inner tube and then covering said inner tube and said reinforcing material layer with a flexible outer tube, wherein said reinforcing material layer is formed by winding at least one filamentous element supplied by a filamentous element supply device in helical manner around the outer circumference of said inner tube, winding direction of the filamentous element being changed to form lattice points at which the filamentous element wound in two different directions is crossed each other, and a relative movement speed and/or a relative rotational speed between said inner tube and the filamentous element supply device being changed so as to change inclination angle of the filamentous element with respect to an axis of the catheter tube continuously or stepwise along the axial direction of the catheter tube.
Claim 29
Independent Claim
149 words
A method of manufacturing catheter tube by forming a reinforcing material layer on an outer circumference of a flexible inner tube and then covering said inner tube and said reinforcing material layer with a flexible outer tube, wherein said reinforcing material layer is formed by winding at least one filamentous element supplied by a filamentous element supply device in helical manner around the outer circumference of said inner tube, winding direction of the filamentous element being changed to form lattice points at which the filamentous element wound in two different directions is crossed each other, and a relative movement speed and/or a relative rotational speed between said inner tube and the filamentous element supply device being changed so as to change intervals between the lattice points of the filamentous element in an axial direction of the catheter tube continuously or stepwise along the axial direction of the catheter tube.
Claim 30
Dependent Claim
141 words
A catheter tube having a longitudinal axis, comprising: a flexible inner tube; a flexible outer tube provided around said inner tube; and a reinforcing material layer disposed between said inner and outer tubes, wherein said reinforcing material layer is formed by arranging at least one filamentous element in a lattice manner in such a way that inclination angles of the filamentous element with respect to the axis of the catheter tube change continuously or in a stepwise manner along the axial direction so as to form one section thereof in which the inclination angle is relatively large and another section thereof in which the inclination angle is relatively small, wherein sections of the catheter tube containing the filamentous element having relatively larger inclination angles are more flexible in comparison with sections thereof containing the filamentous element having relatively small inclination angles.
References Cited (Backward Citations)
No citation records indexed.
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