CN105879191B - Catheter tube - Google Patents
Catheter tube Download PDFInfo
- Publication number
- CN105879191B CN105879191B CN201610058965.5A CN201610058965A CN105879191B CN 105879191 B CN105879191 B CN 105879191B CN 201610058965 A CN201610058965 A CN 201610058965A CN 105879191 B CN105879191 B CN 105879191B
- Authority
- CN
- China
- Prior art keywords
- catheter
- radiopaque marker
- distal end
- tubular body
- disposed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000003550 marker Substances 0.000 claims abstract description 80
- 230000003014 reinforcing effect Effects 0.000 claims description 28
- 239000011800 void material Substances 0.000 claims description 16
- 230000005855 radiation Effects 0.000 claims description 3
- 210000004204 blood vessel Anatomy 0.000 abstract description 13
- 230000002285 radioactive effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 7
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 6
- 229920002635 polyurethane Polymers 0.000 description 6
- 239000004814 polyurethane Substances 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 239000004952 Polyamide Substances 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- 229920002647 polyamide Polymers 0.000 description 3
- -1 polytetrafluoroethylene core Polymers 0.000 description 3
- 239000012779 reinforcing material Substances 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000009940 knitting Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
- A61M25/0108—Steering means as part of the catheter or advancing means; Markers for positioning using radio-opaque or ultrasound markers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M25/0045—Catheters; Hollow probes characterised by structural features multi-layered, e.g. coated
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M25/005—Catheters; Hollow probes characterised by structural features with embedded materials for reinforcement, e.g. wires, coils, braids
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M2025/0008—Catheters; Hollow probes having visible markings on its surface, i.e. visible to the naked eye, for any purpose, e.g. insertion depth markers, rotational markers or identification of type
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M2025/006—Catheters; Hollow probes characterised by structural features having a special surface topography or special surface properties, e.g. roughened or knurled surface
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/02—General characteristics of the apparatus characterised by a particular materials
Abstract
The invention provides a catheter, which can prevent excessive stress concentration and ensure the flexibility of the front end part of the catheter to prevent breakage even if the catheter is inserted into a blood vessel and bent in the catheter with a radioactive ray impermeable marker. In a catheter (1) provided with a catheter tube (20) and a radiopaque marker (30) disposed on the catheter tube (20), the radiopaque marker (30) is fixed in the radial direction of the catheter tube (20) so that a gap (35) is provided between the radiopaque marker (30) and the catheter tube (20).
Description
Technical Field
The present invention relates to a medical catheter.
Background
Conventionally, there is known a technique in which a radiopaque marker is provided at the distal end portion of a catheter in order to enable the distal end position of the catheter to be recognized during surgery.
For example, patent document 1 discloses a catheter including: an elongated tubular body 10 comprising a polytetrafluoroethylene core 16 and a polyurethane outer cover 18 covering the polytetrafluoroethylene core 16; and a flexible tip 12 bonded to the tip of the tubular body 10, wherein a radio-opaque noble metal marker band 14 is provided at a portion where the tubular body 10 and the flexible tip 12 are connected (see page 5, upper right column, fig. 1, and the like).
Further, patent document 2 discloses a medical catheter tube body including: an inner layer tube made of resin; a reinforcing material layer wound around the outer periphery of the inner pipe; and an outer tube covering the inner tube and the reinforcing material layer, and having an X-ray opaque marker disposed in contact with the reinforcing material layer (see fig. 20 and the like).
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. S64-68276
Patent document 2: japanese patent laid-open No. 2006 and 34347
Disclosure of Invention
Problems to be solved by the invention
However, the conventional catheter as described above has a problem that the rigidity of the portion where the radiopaque marker is disposed is very higher than that of other portions.
Specifically, the distal end portion of the conventional catheter is made of a resin having high flexibility so as to be easily inserted into the body. However, when the radiopaque marker made of a metal material such as platinum is disposed at the distal end portion of the catheter, the rigidity of the portion becomes high, and a rigid gap is formed in the boundary region between the portion where the radiopaque marker is disposed and the portion where the radiopaque marker is not disposed. Therefore, for example, when an operator operates a conventional catheter to repeatedly bend the catheter in the body, the following problems occur: the stress is excessively concentrated in a boundary region between a portion where the radiopaque marker is disposed and a portion where the radiopaque marker is not disposed, and the catheter is easily broken in the boundary region.
Therefore, an object of the present invention is to provide a catheter provided with a radiopaque marker, which can prevent excessive stress concentration and prevent breakage by securing flexibility of a distal end portion of the catheter even when the catheter is inserted into a blood vessel and bent.
Means for solving the problems
In order to achieve the above object, a first aspect of the present invention provides a catheter including: a tubular body; and a radiopaque marker disposed on the tubular body, wherein the radiopaque marker is fixed in a radial direction of the tubular body so as to provide a gap between the radiopaque marker and the tubular body.
According to this configuration, in the catheter including the tubular body and the radiopaque marker disposed on the tubular body, the radiopaque marker is fixed in the radial direction of the tubular body so that the space is not provided between the marker and the tubular body, and therefore, even when the catheter is inserted into a blood vessel and bent, excessive stress concentration can be prevented, and the flexibility of the distal end portion of the catheter can be secured to prevent breakage.
In addition, according to claim 2 of the present invention, in the aspect 1 of the present invention, the gap portion is provided on both sides in the radial direction with respect to the radio-opaque marker.
According to this configuration, in addition to the effect of claim 1 of the present invention, since the void portion is provided on both sides in the radial direction with respect to the radiopaque marker, even when the catheter is inserted into a blood vessel and bent, excessive stress concentration can be prevented, and the flexibility of the catheter tip portion can be ensured to further prevent breakage.
The 3 rd aspect of the present invention is the one according to the 1 st or 2 nd aspect of the present invention, wherein a reinforcing member disposed in the longitudinal direction of the tubular body is provided inside the tubular body, and the radiation opaque marker is fixed to a distal end of the reinforcing member.
According to this configuration, in addition to the effects of claim 1 or claim 2 of the present invention, since the reinforcing member disposed in the longitudinal direction of the tubular body is provided inside the tubular body, and the radiation is not transmitted through the marker and fixed to the distal end of the reinforcing member, it is possible to reliably prevent the position of the radiopaque marker from being shifted, to reliably prevent excessive stress concentration, and to reliably prevent cracking.
The 4 th aspect of the present invention is the 3 rd aspect of the present invention, wherein the void portion is formed to extend to a tip of the reinforcing member to which the radiopaque marker is fixed.
According to this configuration, in addition to the effect of claim 3 of the present invention, since the void portion is formed to extend along the distal end of the reinforcing member to which the radiopaque marker is fixed, even when the catheter is inserted into a blood vessel and bent, excessive stress concentration can be further prevented, and the flexibility of the distal end portion of the catheter can be ensured to further prevent breakage.
The effects of the present invention are as follows.
The catheter of the present invention can prevent excessive stress concentration even when the catheter is inserted into a blood vessel and bent, and can ensure flexibility of the catheter tip to prevent breakage.
Drawings
Fig. 1 is a plan view of a catheter according to a first embodiment of the present invention.
Fig. 2 is an enlarged partial cross-sectional view of the catheter of the first embodiment.
Fig. 3 is a partially enlarged cross-sectional view showing a modification of the catheter according to the first embodiment.
Fig. 4 is an enlarged partial cross-sectional view of the catheter of the second embodiment.
Fig. 5 is an enlarged partial cross-sectional view of a catheter of a third embodiment.
Fig. 6 is an enlarged partial cross-sectional view of a catheter according to a fourth embodiment.
In the figure:
1-catheter, 10-operation section, 20, 50, 70, 90-catheter tube, 21-catheter main body, 22-tip sheet, 24, 91-inner layer, 27, 57, 77-reinforcing member, 28, 58, 78-reinforcing section, 29, 59, 79, 93-tip outer layer, 30, 60, 80, 94-radiopaque marker, 30a, 60a, 80 a-thermal bonding section, 35, 65, 85, 95-void section, 92-outer layer.
Detailed Description
[ first embodiment ]
Hereinafter, a catheter according to an embodiment of the present invention will be described with reference to the drawings.
Fig. 1 is a plan view of a catheter according to a first embodiment of the present invention, and fig. 2 is a partially enlarged sectional view of the catheter according to the first embodiment.
As shown in fig. 1, the catheter 1 includes: an operation unit 10 operated by an operator; and a catheter tube (corresponding to the "tubular body" of the present invention) 20 connected to the distal end of the operation unit 10. In addition, the catheter tube 20 includes: a catheter body 21 extending from the operation unit 10; and a distal end piece 22 positioned on the distal end side of the catheter main body portion 21. The vicinity of the distal end of the catheter main body 21 and the vicinity of the distal end piece 22 are tapered such that the outer diameters thereof decrease toward the distal ends.
As shown in fig. 2, the catheter body 21 has a multilayer structure, and is composed of an inner layer 24, a braided body 25, and an outer layer 26 in this order from the radially inner side with respect to the central axis of the catheter body 21.
The inner layer 24 is formed in a tubular shape having a lumen 23 and is disposed over the catheter main body 21 and the distal end piece 22. Further, it is desirable that the inner layer 24 is made of a fluorine-based resin such as polytetrafluoroethylene having a small sliding resistance. In addition, a part or the whole of the inner layer 24 may have a multilayer structure.
Further, a braided body 25 is disposed on the outer periphery of the inner layer 24. The front end of the knitted fabric 25 is disposed in the front end sheet 22 and is located closer to the proximal end side than the front end of the inner layer 24. In the present embodiment, the braided body 25 formed by braiding a plurality of wire rods is arranged on the outer periphery of the inner layer 25, but a coil formed by winding one or a plurality of wire rods may be arranged. The braid 25 is made of a super elastic alloy such as stainless steel or Ni — Ti alloy, piano wire, or tungsten wire.
An outer layer 26 is disposed so as to cover the outer peripheries of the inner layer 24 and the braided body 25, and the tip of the outer layer 26 constitutes the tip of the catheter main body 21. A reinforcing member 27 made of a coil is disposed coaxially with the outer layer 26 in the outer layer 26. The reinforcing member 27 and the outer layer 26 constitute a reinforcing layer 28. Further, the distal end of the reinforcing member 27 extends to the distal end of the catheter main body portion 21. In the present embodiment, the reinforcing member 27 is formed by knitting a plurality of wires, but a knitted body formed by knitting a plurality of wires may be used. The reinforcing member 27 is made of a super elastic alloy such as stainless steel or Ni — Ti alloy, a piano wire, or a tungsten wire.
Examples of the resin material constituting the outer layer 26 include polyamide, polyamide elastomer, polyester, and polyurethane, but in the present embodiment, polyurethane is used. In addition, a part or the whole of the outer layer 26 may have a multilayer structure.
The distal end piece 22 has a multilayer structure, and includes an inner layer 24, a knitted fabric 25, and a distal end outer layer 29 continuously formed from an outer layer 26 in this order from the radially inner side with reference to the center axis of the distal end piece 22. As the resin material constituting the distal end outer layer 29, for example, polyamide elastomer, polyester, polyurethane, or the like can be cited as in the case of the outer layer 26. In addition, polyurethane is used for the distal end outer layer 29 in the present embodiment. By constituting the main portion of the distal end sheet 22 with polyurethane in this manner, damage to the inner wall of the blood vessel can be prevented. In order to improve the visibility of the distal end piece 22, it is desirable that the distal end outer layer 29 contain a radiopaque tungsten powder or the like.
In addition, a ring-shaped radiopaque marker 30 made of a platinum material is disposed in the distal end sheet 22, and the proximal end of the radiopaque marker 30 is fixed to the distal end of the reinforcing member 27 via a thermal bonding portion 30 a. Specifically, the proximal end of the radiopaque marker 30 and the distal end of the reinforcing member 27 are thermally bonded by YAG welding. In the present embodiment, platinum is used for the radiopaque marker 30, but other metal materials that are radiopaque may be used. In the present embodiment, the proximal end of the radiopaque marker 30 and the distal end of the reinforcing member 27 are thermally bonded, but may be fixed by other fixing means such as an adhesive.
As shown in fig. 2, a gap 35 is provided between the inner layer 24 and the radiopaque marker 30 on the radially inner side of the catheter tube 20, and a part of the outer peripheral surface of the radiopaque marker 30 is exposed in the gap 35. That is, the surface of the outer peripheral surface of the radiopaque marker 30 on the inner layer 24 side does not contact other members.
In the catheter 1, the radiopaque marker 30 is fixed so as to be provided with the gap portion 35 between the radiopaque marker 30 and the catheter tube 20 at the radially inner side of the catheter tube 20, and therefore, even when the catheter 1 is inserted into a blood vessel and bent, the gap portion 35 can sufficiently absorb the deformation of the inner layer 24, the distal end outer layer 29, and the like at the proximal side of the radiopaque marker 30, and prevent excessive stress concentration. This ensures flexibility of the distal end portion of the catheter 1, thereby preventing breakage of the catheter 1.
Further, as described above, since the radiopaque marker 30 and the distal end of the reinforcing member 27 are thermally bonded, the positional displacement of the radiopaque marker 30 can be prevented, and excessive stress concentration can be reliably prevented to reliably prevent the breakage of the catheter 1. Further, even in the manufacturing process of the catheter tube 20, since the distal end outer layer 29 can be formed in a state in which the distal ends of the radiopaque marker 30 and the reinforcing member 27 are thermally bonded, it is possible to prevent the positional displacement of the radiopaque marker 30, and to manufacture the catheter 1 with high dimensional accuracy.
Further, the reinforcing member 27 and the radiopaque marker 30 are thermally bonded, so that the resin material constituting the distal end outer layer 29 is less likely to enter the void 35 formed on the inner layer 24 side of the radiopaque marker 30, and the void 35 can be easily formed.
Further, since the void 35 is formed between the thermal bonding portion 30a (the distal end of the reinforcing member 27) and the inner layer 24, when the catheter 1 is inserted into a blood vessel and bent, excessive stress concentration can be further prevented, and the flexibility of the distal end portion of the catheter 1 can be ensured to further prevent the catheter 1 from being broken.
Fig. 3 is a partially enlarged cross-sectional view showing a modification of the catheter according to the first embodiment. In fig. 3, the distal end outer layer 29 partially enters the inside of the space 35 provided between the radiopaque marker 30 and the inner layer 24. With this configuration, the radiopaque marker 30 is thermally bonded to the reinforcing member 27 via the thermal bonding portion 30a, and is supported from below by the distal end outer layer 29, so that the positional displacement of the radiopaque marker 30 can be further prevented.
A catheter of the present invention having this configuration is provided with a tubular body and a radiopaque marker disposed on the tubular body, and is characterized in that the radiopaque marker is fixed in a state in which a gap portion is provided between the radiopaque marker and the tubular body in a radial direction of the tubular body and the tubular body is inserted into an edge end portion of the radiopaque marker.
[ second embodiment ]
In the following, the catheter of the second embodiment will be described, but the description of the catheter in common with the catheter of the first embodiment will be simplified or omitted, and the same reference numerals will be assigned to the drawings.
Fig. 4 is an enlarged partial cross-sectional view of the catheter of the second embodiment. In fig. 4, the catheter tube 50 has a different positional relationship between the radiopaque marker and the void portion than the catheter tube 20 of the first embodiment.
That is, the proximal end of the radiopaque marker 60 disposed on the distal end sheet 22 is heat-bonded to the distal end of the reinforcing member 57 constituting the reinforcing layer 58 via the heat-bonding portion 60a, but the void portion 35 in the catheter tube 20 of the first embodiment is disposed radially inward of the radiopaque marker 30 with respect to the catheter tube 20, whereas the void portion 65 of the present embodiment is disposed radially outward of the catheter tube 50 with respect to the radiopaque marker 60 (between the radiopaque marker 60 and the distal end outer layer 59).
According to this configuration, when the catheter is inserted into a blood vessel and bent, excessive stress concentration can be prevented, and the flexibility of the distal end portion of the catheter can be ensured to prevent the catheter from being broken. Further, since the void 65 is also formed between the thermal bonding portion 60a (the distal end of the reinforcing member 57) and the distal end outer layer 59, when the catheter is inserted into a blood vessel and bent, excessive stress concentration can be further prevented, and the flexibility of the distal end portion of the catheter can be ensured to further prevent the breakage of the catheter.
[ third embodiment ]
In the following, the catheter of the third embodiment will be described, but the description of the catheter of the first embodiment and the catheter of the second embodiment in common will be simplified or omitted, and the same reference numerals will be assigned to the drawings.
Fig. 5 is an enlarged partial cross-sectional view of a catheter of a third embodiment. In fig. 5, the catheter tube 70 has a different positional relationship between the radiopaque marker and the void portion than the catheter tube 20 of the first embodiment.
That is, the proximal end of the radiopaque marker 80 disposed on the distal end sheet 22 is heat-bonded to the distal end of the reinforcing member 77 constituting the reinforcing layer 78 via the heat-bonding portion 80a, but the void portion 85 of the present embodiment is disposed on both sides of the radiopaque marker 80 in the radial direction of the catheter tube 70 (between the radiopaque marker 80 and the inner layer 25 and between the radiopaque marker 80 and the distal end outer layer 79).
According to this configuration, when the catheter is inserted into a blood vessel and bent, excessive stress concentration can be further prevented, and the flexibility of the distal end portion of the catheter can be ensured to further prevent the breakage of the catheter.
[ fourth embodiment ]
In the following, the catheter of the fourth embodiment will be described, but the description of the catheter of the first embodiment, the catheter of the second embodiment, and the catheter of the third embodiment is simplified or omitted, and the same reference numerals are assigned to the drawings.
Fig. 6 is an enlarged partial cross-sectional view of a catheter according to a fourth embodiment. In fig. 6, the catheter tube 90 is composed of the catheter main body 21 and the distal end piece 22. The catheter main body 21 has an inner layer 91 and an outer layer 92 covering the outer periphery of the inner layer 91, and the distal end piece 22 has the inner layer 91 extending from the catheter main body 21 and a distal end outer layer 93 covering the outer periphery of the inner layer 91.
The radiopaque marker 94 disposed on the distal end sheet 22 is disposed between the inner layer 91 and the distal end outer layer 93, and a gap 95 is provided between the radiopaque marker 94 and the inner layer 91.
According to this configuration, the void 95 located inside the radiopaque marker 94 prevents excessive stress concentration when the catheter is inserted into a blood vessel and bent, and prevents the catheter from being broken while ensuring flexibility of the distal end portion of the catheter.
In the present embodiment, the void 95 is provided between the radiopaque marker 94 and the inner layer 91, but may be provided on the radially outer side of the catheter tube 90 with respect to the radiopaque marker 94 (between the radiopaque marker 94 and the distal end outer layer 93) or on both sides of the catheter tube 90 in the radial direction with respect to the radiopaque marker 94 (between the radiopaque marker 94 and the inner layer 91 and between the radiopaque marker 94 and the distal end outer layer 93) as in the catheters of the second to third embodiments. Even in this case, the same effects as those described in the embodiments are exhibited.
In the first to fourth embodiments, the configuration in which the radiopaque marker is disposed on the distal end side has been described, but the configuration may be such that the radiopaque marker is disposed on the catheter tube side, and even in this case, the same effects as those described in the respective embodiments are exhibited.
In the first to fourth embodiments, the description has been given of the structure in which the catheter is separated into the catheter tube body and the distal end piece, but the catheter tube body and the distal end piece may be integrally formed with the catheter, and even in this case, the same effects as those described in the respective embodiments are exhibited.
In the first to fourth embodiments, the shape of the radiopaque marker is described as a ring shape, but other shapes such as a coil shape and a shape in which a part of the ring shape is cut out may be used. However, if the catheter is in a ring shape, excessive stress concentration can be prevented regardless of the direction in which the distal end of the catheter is bent, and the catheter can be prevented from being broken while ensuring flexibility of the distal end portion of the catheter.
Claims (4)
1. A catheter is provided with:
a tubular body having an inner layer; and
a radiopaque marker disposed on the outer periphery of the inner layer of the tubular body,
the above-mentioned catheter is characterized in that,
the radiopaque marker is fixed to the tubular body in a radial direction thereof so as to provide a gap between the radiopaque marker and the inner layer.
2. The catheter of claim 1,
the gap is provided on both sides in the radial direction with respect to the radio-opaque marker.
3. The catheter of claim 1 or 2,
a reinforcing member disposed in the tubular body along the longitudinal direction of the tubular body,
the radiation opaque marker is fixed to the distal end of the reinforcing member.
4. The catheter of claim 3,
the void portion is formed to extend to a tip of the reinforcing member to which the radiopaque marker is fixed.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015026948 | 2015-02-13 | ||
| JP2015-026948 | 2015-02-13 | ||
| JP2015-242283 | 2015-12-11 | ||
| JP2015242283A JP6381138B2 (en) | 2015-02-13 | 2015-12-11 | catheter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105879191A CN105879191A (en) | 2016-08-24 |
| CN105879191B true CN105879191B (en) | 2020-08-04 |
Family
ID=56760713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610058965.5A Expired - Fee Related CN105879191B (en) | 2015-02-13 | 2016-01-28 | Catheter tube |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6381138B2 (en) |
| CN (1) | CN105879191B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6249544B1 (en) * | 2016-11-24 | 2017-12-20 | 朝日インテック株式会社 | Catheter and balloon catheter |
| KR102333910B1 (en) | 2017-06-30 | 2021-12-02 | 아사히 인텍크 가부시키가이샤 | catheter |
| JP7006020B2 (en) * | 2017-08-25 | 2022-01-24 | 住友ベークライト株式会社 | Catheter and catheter kit |
| CN111601632B (en) * | 2018-01-26 | 2022-06-07 | 朝日英达科株式会社 | Catheter tube |
| WO2019189533A1 (en) * | 2018-03-29 | 2019-10-03 | テルモ株式会社 | Catheter assembly |
| JP7304424B2 (en) * | 2019-11-08 | 2023-07-06 | 朝日インテック株式会社 | catheter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5810837A (en) * | 1992-12-16 | 1998-09-22 | Schneider (Europe) A.G. | Device for the implantation of a self-expanding endoprosthesis |
| JP2009268648A (en) * | 2008-05-02 | 2009-11-19 | Nipro Corp | Medical catheter |
| WO2013179103A1 (en) * | 2012-05-31 | 2013-12-05 | Baylis Medical Inc. | Radiofrequency perforation apparatus |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001190681A (en) * | 2000-01-12 | 2001-07-17 | Terumo Corp | Catheter |
| US20030125711A1 (en) * | 2001-10-04 | 2003-07-03 | Eidenschink Tracee E.J. | Flexible marker band |
| US20060201601A1 (en) * | 2005-03-03 | 2006-09-14 | Icon Interventional Systems, Inc. | Flexible markers |
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2015
- 2015-12-11 JP JP2015242283A patent/JP6381138B2/en not_active Expired - Fee Related
-
2016
- 2016-01-28 CN CN201610058965.5A patent/CN105879191B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5810837A (en) * | 1992-12-16 | 1998-09-22 | Schneider (Europe) A.G. | Device for the implantation of a self-expanding endoprosthesis |
| JP2009268648A (en) * | 2008-05-02 | 2009-11-19 | Nipro Corp | Medical catheter |
| WO2013179103A1 (en) * | 2012-05-31 | 2013-12-05 | Baylis Medical Inc. | Radiofrequency perforation apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6381138B2 (en) | 2018-08-29 |
| CN105879191A (en) | 2016-08-24 |
| JP2016152907A (en) | 2016-08-25 |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20200804 |