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WO2015141392A1 - Cathéter et ensemble cathéter - Google Patents

Cathéter et ensemble cathéter Download PDF

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Publication number
WO2015141392A1
WO2015141392A1 PCT/JP2015/054919 JP2015054919W WO2015141392A1 WO 2015141392 A1 WO2015141392 A1 WO 2015141392A1 JP 2015054919 W JP2015054919 W JP 2015054919W WO 2015141392 A1 WO2015141392 A1 WO 2015141392A1
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WO
WIPO (PCT)
Prior art keywords
catheter
shaft
connecting portion
extension shaft
guide wire
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.)
Ceased
Application number
PCT/JP2015/054919
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English (en)
Japanese (ja)
Inventor
伊藤隆史
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Terumo Corp
Original Assignee
Terumo Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Terumo Corp filed Critical Terumo Corp
Priority to JP2016508617A priority Critical patent/JP6633513B2/ja
Publication of WO2015141392A1 publication Critical patent/WO2015141392A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • 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
    • A61M2025/0177—Introducing, guiding, advancing, emplacing or holding catheters having external means for receiving guide wires, wires or stiffening members, e.g. loops, clamps or lateral tubes
    • 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
    • A61M2025/0183—Rapid exchange or monorail catheters

Definitions

  • the present invention relates to a rapid exchange type catheter and catheter set capable of extending the effective length.
  • the rapid exchange type catheter is provided with a guide wire lumen only at its distal end, and the catheter can be exchanged more easily than an over-the-wire type catheter.
  • a penetrating catheter for penetrating a stenosis portion generated in a living body lumen such as a blood vessel is known (for example, see Japanese Patent Application Laid-Open No. 2004-275435).
  • a stenosis is formed by inserting a guide wire through a stenosis or occlusion (such as stenosis and occlusion), which may occur in a living body lumen such as a blood vessel.
  • a stenosis or occlusion such as stenosis and occlusion
  • Treatment of the department is extensive.
  • a penetration catheter for penetrating the stenosis part there are a penetration catheter for penetrating the stenosis part and a support catheter for assisting the tip part to suppress bending of the tip part of the guide wire. used.
  • the stenosis in the living body lumen is longer than expected by the operator, or the living body tube
  • the effective length of the catheter may be insufficient. Then, it is necessary to remove the catheter inserted into the living body lumen and insert a different catheter having a longer overall length than the removed catheter into the living body lumen, which increases the cost and the treatment time. End up.
  • a catheter having a longer effective length than the catheter provided in the operating room may be required.
  • the patient may not be reliably treated.
  • the present invention has been made in consideration of such problems, and can reduce the treatment time and cost, and can reliably treat a stenosis in a living body lumen. And it aims at providing a catheter set.
  • a catheter according to the present invention is a rapid exchange type catheter, and includes a cylindrical body, and a flexible shaft that is formed longer than the cylindrical body and provided at a proximal end portion of the cylindrical body.
  • the shaft has a shaft body, and a connection portion provided at a proximal end portion of the shaft body to which an extension shaft for extending an effective length of the catheter can be connected. To do.
  • the effective length of the catheter is increased by connecting the extension shaft to the connecting portion. Since it can be extended, the stenosis can be reached without exchanging the catheter. As a result, the treatment time can be shortened and the cost can be reduced, and the stenosis can be reliably treated.
  • the connecting portion may be a male portion or a female portion.
  • the extension shaft can be easily connected to the connection portion by fitting and coupling.
  • the connecting portion may be a male portion made of a material having shape memory characteristics.
  • the connecting portion may be formed in a wavy shape.
  • the connecting portion can be elastically deformed so that the height of the wavy portion of the connecting portion is lowered in a state where the connecting portion and the extension shaft are fitted, the restoring force (elasticity) The connecting portion and the extension shaft can be firmly connected by the force).
  • the connecting portion may be a female portion made of a plastically deformable metal material.
  • connection portion and the extension shaft can be firmly connected by crimping the connection portion in a state where the connection portion and the extension shaft are fitted.
  • the catheter may further include an operation device that is detachably provided on the shaft body and the extension shaft.
  • the operability of the catheter can be improved by mounting the operation device on the shaft body. Further, since the operation device can be changed from the shaft to the extension shaft in a state where the extension shaft is connected to the connection portion, the operability can be improved while extending the effective length of the catheter.
  • the operation device may be provided with a wire holding portion that holds a guide wire that is inserted through the lumen of the cylindrical body.
  • the operation device by holding the guide wire in the wire holding portion of the operation device, the operation device can be grasped and the catheter and the guide wire can be operated simultaneously.
  • a catheter set according to the present invention is a catheter set comprising a rapid exchange type catheter and an extension shaft for extending the effective length of the catheter, wherein the catheter is the catheter described above.
  • the treatment time can be shortened and the cost can be reduced, and the stenosis in the living body lumen can be achieved.
  • the part can be treated reliably.
  • FIG. 2 is a transverse sectional view taken along line II-II in FIG.
  • FIG. 3A is an enlarged partial cross-sectional view of a first connection portion of a catheter and a second connection portion of an extension shaft constituting the catheter set
  • FIG. 3B is a connection of the first connection portion and the second connection portion.
  • FIG. 4A is an explanatory view showing a state in which a guide wire is passed through the first constriction
  • FIG. 4B is an explanatory view showing a state in which the guide wire is guided to the second constriction.
  • FIG. 7A is a partially omitted explanatory view of the catheter set according to the second embodiment
  • FIG. 7B is a partially omitted explanatory view of the catheter set according to the third embodiment
  • FIG. 7C is a catheter according to the fourth embodiment. It is a partially omitted illustration of the set.
  • the catheter set 10 ⁇ / b> A includes a catheter 12 and an extension shaft 14.
  • the catheter 12 assists the distal end in order to suppress bending of the distal end of the guide wire GW that passes through a narrowed portion in a biological lumen such as a blood vessel, bile duct, trachea, esophagus, or urethra.
  • a biological lumen such as a blood vessel, bile duct, trachea, esophagus, or urethra.
  • This is a rapid exchange type support catheter.
  • the catheter 12 may be a rapid exchange type penetrating catheter that penetrates the narrowed portion.
  • the catheter 12 includes a thin and long shaft 16, an operation device 18 that is detachably provided on the proximal end side of the shaft 16, and a cylindrical body 20 that is provided on the distal end portion of the shaft 16.
  • the shaft 16 has a shaft main body 22 and a first connection portion 24 provided at a base end portion of the shaft main body 22.
  • the shaft body 22 is a solid linear member that is formed to be longer (thinner and longer) than the cylindrical body 20, and has flexibility.
  • the shaft body 22 can be made of any material, but can be made of a metal material such as stainless steel, Ni—Ti alloy, or cobalt alloy.
  • the catheter 12 is configured as a penetrating catheter, if the shaft main body 22 is formed of a solid metal wire, an appropriate rigidity is obtained in the shaft main body 22 and a pushing force acting on the proximal end side of the shaft main body 22 is obtained. Can be efficiently transmitted to the cylindrical body 20.
  • the first connecting portion 24 is configured such that the extension shaft 14 for extending the effective length of the catheter 12 can be connected.
  • the configuration of the first connection unit 24 will be described later.
  • the operation device 18 is formed in a size that can be easily operated by a human hand, and includes a cylindrical handle 28 having a lumen 26 through which the shaft 16 is inserted, a chuck 30 disposed at a distal end opening of the handle 28, A cap 32 that is screw-fitted to the distal end side of the handle 28.
  • the chuck 30 has a through-hole through which the shaft 16 is inserted at the center thereof, and the large-diameter portion on the distal end side is the handle 28 with the small-diameter portion on the proximal end side disposed in the distal-end opening of the handle 28. Exposed from the lumen.
  • the outer surface of the large diameter portion is formed in a tapered shape that gradually decreases in diameter toward the small diameter portion.
  • the chuck 30 is formed with a plurality of slits 38 (not shown) extending in the axial direction and communicating with the through holes in the circumferential direction. Each slit 38 extends from the tip of the large diameter portion to the middle of the small diameter portion.
  • the operation device 18 having such a configuration, when the screw fitting force of the cap 32 with respect to the handle 28 is increased with the shaft body 22 being passed through the lumen 26 of the handle 28 through the through hole of the chuck 30, the size of the chuck 30 is increased. The diameter portion is pressed toward the handle 28 and the through hole of the chuck 30 is reduced in diameter. If it does so, since the wall surface which comprises a through-hole is pressed on the outer surface of the shaft main body 22, the operation device 18 will be fixed with respect to the shaft main body 22.
  • the operation device 18 further includes a wire holding portion 34 that is fixed to the proximal end side of the handle 28 and holds the guide wire GW.
  • the wire holding part 34 can be comprised with a rubber material, for example.
  • the wire holding part 34 is formed with a circular hole 36 and a slit 38 that communicates with the hole 36 and opens on the surface opposite to the handle 28.
  • Each of the hole 36 and the slit 38 passes through the wire holding portion 34 along the axial direction of the handle 28 (see FIG. 1).
  • the hole 36 has a hole diameter that is smaller than the outer diameter of the guide wire GW.
  • the slit 38 is formed so as to gradually narrow toward the hole 36.
  • the wall of the hole 36 is pushed outward in the radial direction by the guide wire GW by inserting the guide wire GW into the hole 36 through the slit 38. Therefore, the guide wire GW is held on the wall surface forming the hole 36 by the restoring force of the wire holding portion 34.
  • the cylindrical body 20 is configured in a cylindrical shape, and a distal end portion of the shaft 16 is fixed to a proximal end portion thereof.
  • the cylindrical body 20 is disposed between an inner layer 42 having a lumen (guide wire lumen) 40 through which the guide wire GW can be inserted, an outer layer 44 provided on the outer peripheral side of the inner layer 42, and the inner layer 42 and the outer layer 44. Reinforcing body (blade) 46.
  • the distal end portion of the cylindrical body 20 is located at the boundary between the outer peripheral surface of the guide wire GW and the outer peripheral surface of the distal end of the cylindrical body 20 from the viewpoint of entering into the constricted portion and preventing damage to the living body lumen.
  • the tapered surface is tapered toward the tip so that the formed step surface is small.
  • the radial thickness of the tapered distal end portion of the cylindrical body 20 is larger than the radial thickness of the proximal end portion of the cylindrical body 20 so that the distal end portion of the guide wire can be easily assisted. It is preferable that the thickness is too thick.
  • the inner layer 42 can be made of any material, but can be made of, for example, a fluorine resin such as PTFE (polytetrafluoroethylene).
  • PTFE polytetrafluoroethylene
  • the outer layer 44 can be composed of any material, but can be composed of, for example, various thermoplastic elastomers such as polyurethane elastomer, polyester elastomer, polyamide elastomer, and mixtures thereof. Further, a tapered portion is formed at the tip of the outer layer 44. By tapering the distal end in this manner, the catheter 12 can easily pass through the stenosis.
  • the reinforcing body 46 is embedded in the outer layer 44 in a net-like state.
  • the reinforcing body 46 can be made of any material, but for example, tungsten, stainless steel, or the like can be used.
  • the reinforcing body 46 may be formed in a spiral coil shape or a rod shape.
  • an X-ray opaque marker or the like on the cylinder 20 so that the position of the catheter 12 in the living body lumen can be confirmed.
  • an X-ray opaque material such as barium sulfate, bismuth oxide, tungsten or the like is added to the material constituting the cylinder 20 in order to grasp the position of the cylinder 20 in the living body lumen. You may keep it.
  • the cylindrical body 20 may be provided with an X-ray opaque marker such as platinum on the distal end portion and the proximal end portion of the cylindrical body 20 in order to measure the stenosis portion in the living body lumen.
  • the first connecting portion 24 folds a linear member made of a material having shape memory characteristics, such as a Ti—Ni shape memory alloy, into a wave shape from the approximate center of the base end surface of the shaft body 22. It is formed so as to bend. That is, the 1st connection part 24 is comprised as a male part.
  • shape memory characteristics such as a Ti—Ni shape memory alloy
  • the width dimension (interval between wave peaks and valleys) W of the first connection portion 24 is formed to be approximately the same as the outer diameter D1 of the shaft body 22.
  • the extension shaft 14 is a tubular member having a lumen 48 opened from the distal end to the proximal end thereof, and is provided integrally with the extension shaft main body 50 and the distal end portion of the extension shaft main body 50 so that the first connection of the catheter 12 is achieved. And a second connecting portion 52 connectable to the portion 24.
  • the extension shaft 14 can be made of the same material as that of the shaft body 22 and can be set to an arbitrary length.
  • the second connection portion 52 is configured as a female portion that is fitted and coupled to the first connection portion 24 that is a male portion.
  • the hole diameter D ⁇ b> 2 of the second connection portion 52 is smaller than the width dimension W of the first connection portion 24. Therefore, when the first connection portion 24 is inserted into the lumen 48 of the second connection portion 52, the first connection portion 24 has a narrow width (the height of the crest of the first connection portion 24 is reduced). Since it is elastically deformed (to be lowered), the restoring force of the first connecting portion 24 can be applied to the inner surface of the second connecting portion 52. Thereby, the 1st connection part 24 and the 2nd connection part 52 can be firmly fittingly joined (refer FIG. 3B).
  • the outer diameter D3 of the second connection portion 52 is formed substantially the same as the outer diameter D1 of the shaft body 22.
  • an X-ray opaque marker such as platinum
  • an X-ray contrast marker may also be provided at the distal end portion of the extension shaft 14 or the second connection portion 52.
  • the catheter set 10A according to the present embodiment is basically configured as described above, and the effects will be described below.
  • the catheter set 10 ⁇ / b> A continues, for example, a first stenosis part 202 and a second stenosis part 204 that are lesions with a high degree of stenosis or chronic total occlusion lesions (CTO: Chronic Total Occlusion) occurring in the blood vessel 200.
  • CTO Chronic Total Occlusion
  • a sheath introducer (not shown) is punctured into a blood vessel (for example, radial artery or femoral artery) by the Seldinger method, and a guide wire is inserted.
  • the GW is introduced in advance and the guiding catheter 206 is placed at a predetermined position in the predetermined blood vessel 200. At this time, since the guide wire GW cannot pass through the first constricted portion 202 alone, the guide wire GW is positioned on the near side (the central side and the right side in FIG. 4A) of the first constricted portion 202.
  • the guide wire GW is passed through the lumen 40 of the cylindrical body 20 of the catheter 12 as a support catheter, the catheter 12 is advanced through the lumen of the guiding catheter 206 along the guide wire GW, and the distal end thereof is guided. It is located near the tip of the wire GW.
  • the extension shaft 14 is not attached to the catheter 12, and the operation device 18 is attached to the proximal end portion of the shaft body 22.
  • the surgeon passes the guide wire GW through the first constricted portion 202 while assisting the distal end portion of the guide wire GW with the catheter 12 (see FIG. 4A).
  • the operator may operate to push the guide wire GW and the catheter 12 alternately to the first stenosis part 202 by a predetermined length alternately, or the guide wire GW and the catheter 12 together to the first stenosis part 202. You may operate so that it may push forward.
  • the proximal end side of the guide wire GW is fixed to the operation device 18 by inserting it into the hole 36 through the slit 38 of the wire holding portion 34.
  • the operator can easily operate both the guide wire GW and the catheter 12 simultaneously by grasping the operation device 18.
  • the treatment of the first stenosis 202 is completed.
  • the second stenosis part 204 is present on the distal side of the treated first stenosis part 202, sufficient blood perfusion may not be obtained on the distal side of the first stenosis part 202. . In this case, the treatment of the second stenosis 204 is continued.
  • the surgeon operates the guide wire GW and presses the distal end thereof against the second constricted portion 204 (see FIG. 4B).
  • the guide wire GW is operated after the guide wire GW is removed from the wire holding portion 34 of the operation device 18. To do.
  • the distal end of the catheter 12 is positioned in the vicinity of the distal end of the guide wire GW. At this time, when the distance between the first stenosis part 202 and the second stenosis part 204 is relatively long, the catheter 12 may not reach the second stenosis part 204.
  • the effective length of the catheter 12 is extended by connecting the extension shaft 14 to the first connection portion 24 of the catheter 12. That is, the first connection portion 24 formed to be bent in a wave shape is inserted into the lumen 48 of the second connection portion 52. Then, the first connecting portion 24 is elastically deformed so that the height of the wavy mountain is lowered and the restoring force acts on the inner surface of the second connecting portion 52, so that the first connecting portion 24 and the second connecting portion 52 are It is firmly fitted and connected. At this time, it goes without saying that the operator selects the extension shaft 14 having a length corresponding to the distance from the first stenosis part 202 to the second stenosis part 204 and connects it to the catheter 12.
  • the operator releases the fixation of the operation device 18 to the shaft 16 by operating the cap 32 of the operation device 18 to weaken the screw fitting force to the handle 28. Thereafter, the operating device 18 is moved with respect to the extension shaft 14 by operating the cap 32 in a state where the operating device 18 is moved to an arbitrary position on the proximal end side of the extension shaft main body 50 to increase the screw fitting force with respect to the handle 28. (See FIG. 5).
  • the guide wire GW is passed through the second constricted portion 204 while assisting the distal end portion of the guide wire GW with the catheter 12 (see FIG. 6). Since the treatment of the second stenosis part 204 is the same as the treatment of the first stenosis part 202 described above, detailed description thereof is omitted. After the treatment of the second stenosis 204, the catheter 12 and the guide wire GW are removed from the blood vessel 200.
  • the effective length of the catheter 12 can be extended by connecting the second connection portion 52 of the extension shaft 14 to the first connection portion 24 of the catheter 12. Therefore, after treating the first stenosis 202 on the near side (central side), the effective length of the catheter 12 is used when treating the second stenosis 204 present on the distal side of the first stenosis 202. Even if this is insufficient, the catheter 12 can reach the second constricted portion 204 by connecting the extension shaft 14 to the catheter 12. This eliminates the need to replace the catheter 12 with a different catheter having a long effective length after treating the first stenosis 202, thereby reducing the treatment time and reducing the cost and the first stenosis 202. And the 2nd constriction part 204 can be treated reliably.
  • the first connecting portion 24 of the catheter 12 is a male portion and the second connecting portion 52 of the extension shaft 14 is a female portion, the first connecting portion 24 and the second connecting portion 52 are fitted and joined.
  • the extension shaft 14 can be easily connected to the catheter 12.
  • the 1st connection part 24 is comprised with the material which has a shape memory characteristic, breakage of the 1st connection part 24 can be suppressed.
  • the first connecting portion 24 is formed in a wave shape, when the first connecting portion 24 is inserted into the inner cavity 48 of the second connecting portion 52, the height of the wave mountain of the first connecting portion 24 is increased.
  • the first connecting portion 24 can be elastically deformed so that the height is low. Thereby, since the restoring force of the 1st connection part 24 can be made to act on the inner surface of the 2nd connection part 52, the 1st connection part 24 and the 2nd connection part 52 can be connected firmly.
  • the operation device 18 can be attached to the shaft 16, the operability of the catheter 12 can be improved. Further, since the operation device 18 can be changed from the shaft 16 to the extension shaft 14 in a state where the extension shaft 14 is connected to the first connection portion 24, the operability can be improved while extending the effective length of the catheter 12. it can.
  • the operation device 18 can be held and the catheter 12 and the guide wire GW can be operated simultaneously.
  • the catheter set 10A according to the present embodiment is not limited to the configuration described above.
  • the extension shaft 14 may be configured, for example, by providing a tubular second connection portion 52 at the distal end portion of a thin and solid extension shaft main body 50. In this case, since the rigidity of the extension shaft main body 50 is increased, the pushing force applied to the extension shaft main body 50 can be efficiently transmitted to the shaft 16.
  • the second connection portion 52 may be made of a plastically deformable metal material. In this case, it is possible to clamp the second connecting portion 52 with forceps or the like while the first connecting portion 24 is inserted into the lumen 48 of the second connecting portion 52. Thereby, the 1st connection part 24 and the 2nd connection part 52 can be fitted and connected still more firmly.
  • the catheter set 10A according to the present embodiment can also be used for the treatment of a relatively long stenosis part or the treatment of a stenosis part generated in a blood vessel of a lower limb.
  • the catheter 12 when treatment is performed to guide the catheter 12 inserted from the radial artery to a stenosis that has occurred in the blood vessel of the lower limb, the blood vessel has many curved portions, and the effective length of the catheter 12 may be insufficient. is there.
  • the catheter 12 since the effective length can be extended by connecting the extension shaft 14 to the catheter 12, the catheter 12 can be reliably attached to the stenosis without replacing the catheter 12 with another catheter having a long effective length. Treatment can be performed.
  • the catheter set 10A can also be used together with a therapeutic catheter such as a balloon catheter, a stent delivery catheter, or a drug injection catheter.
  • a therapeutic catheter such as a balloon catheter, a stent delivery catheter, or a drug injection catheter.
  • the catheter 12 can be inserted through the therapeutic catheter. It may be a penetrating catheter provided with a cylindrical body 20 having a cavity 40 at the distal end.
  • the catheter set 10B according to this embodiment is different from the catheter set 10A according to the first embodiment described above in the configuration of the shaft 62 and the extension shaft 64 of the catheter 60.
  • the shaft 62 is a tubular member having a lumen 66 that opens from the distal end to the proximal end thereof, and includes a shaft body 68 and a first connection portion 70 that is integrally provided at the proximal end portion of the shaft body 68.
  • the 1st connection part 70 is comprised as a female part.
  • the extension shaft 64 has a thin and solid extension shaft main body 72 and a second connection portion 74 provided at the tip of the extension shaft main body 72.
  • the outer diameter of the extension shaft main body 72 is set to be substantially the same as the outer diameter of the first connection portion 70.
  • the restoring force of the second connecting portion 74 acts on the inner surface of the first connecting portion 70.
  • the connecting portion 70 and the second connecting portion 74 are firmly fitted and coupled.
  • the same effects as those of the first embodiment described above can be obtained.
  • the extension shaft main body 72 is configured to be solid, the rigidity can be increased compared to the case where the extension shaft main body 72 is configured to be hollow. Thereby, the pushing force which acted on the base end side of the extension shaft main body 72 can be efficiently transmitted to the shaft 62.
  • the shaft 62 is a tubular member having a constant outer diameter by integrally providing the first connecting portion 70 at the base end portion of the shaft main body 68, the extension shaft 64 is connected to the first connecting portion 70.
  • the first connecting portion 70 can be prevented from interfering with the operator's fingers and other medical devices.
  • the catheter set 10B according to the present embodiment is not limited to the configuration described above.
  • the shaft body 68 may be configured to be solid.
  • the rigidity of the shaft main body 68 can be increased as compared with the case where the shaft main body 68 is hollow. Thereby, the pushing force which acted on the base end side of the shaft main body 68 can be efficiently transmitted to the cylindrical body 20.
  • first connection portion 70 may be made of a metal material that can be plastically deformed. If it does so, the 1st connection part 70 can be crimped with forceps etc., and, thereby, the 1st connection part 70 and the 2nd connection part 74 can be connected still more firmly.
  • the shaft main body 68 and the first connection portion 70 can be made of different materials.
  • the catheter set 10C according to the present embodiment is different from the catheter set 10A according to the first embodiment described above in the configuration of the extension shaft 80, and includes a connecting portion 82.
  • the extension shaft 80 has an extension shaft main body 84 and a second connection portion 86, and has the same configuration as the extension shaft 64 according to the second embodiment described above. Therefore, detailed description of the extension shaft 80 is omitted.
  • the connecting portion 82 is a tubular member having an inner cavity 88 that opens from the distal end to the proximal end, and can be made of the same material as the shaft body 22.
  • the connecting portion 82 is formed to be somewhat longer than the total length of the length along the axial direction of the shaft body 22 of the first connecting portion 24 and the length along the axial direction of the extension shaft main body 84 of the second connecting portion 86. Has been.
  • the restoring force of the first connecting part 24 acts on the inner surface of the connecting part 82, so the first connecting part 24 and the connecting part 82 is firmly fitted and coupled.
  • the 2nd connection part 86 is inserted in the other opening part of the connection part 82, since the restoring force of the 2nd connection part 86 will act on the inner surface of the connection part 82, the 2nd connection part 86 and the connection part 82 will be It is firmly fitted and connected. Thereby, the 1st connection part 24 and the 2nd connection part 86 will be firmly connected via the connection part 82.
  • FIG. According to the present embodiment, the same effects as those of the first embodiment described above can be obtained.
  • the catheter set 10D according to this embodiment differs from the catheter set 10A according to the first embodiment described above in the configuration of the shaft 92 of the catheter 90, and includes a connecting portion 94.
  • the shaft 92 has a shaft main body 96 and a first connection portion 98, and has the same configuration as the shaft 62 according to the second embodiment described above. Therefore, detailed description of the shaft 92 is omitted.
  • the connecting portion 94 has the same configuration as the first connecting portion 24 of the first embodiment described above, and a linear member made of a material having shape memory characteristics such as a Ti—Ni-based shape memory alloy is used. It is configured by bending in a wave shape.
  • the connecting portion 94 when one end side of the connecting portion 94 is inserted into the lumen 100 of the first connecting portion 98, the restoring force on the one end side of the connecting portion 94 acts on the inner surface of the first connecting portion 98.
  • the part 98 and the connecting part 94 are firmly fitted and coupled.
  • the restoring force on the other end side of the connecting portion 94 acts on the inner surface of the second connecting portion 52.
  • 52 and the connecting portion 94 are firmly fitted and coupled. Thereby, the 1st connection part 98 and the 2nd connection part 52 will be firmly connected via the connection part 94.
  • FIG. According to the present embodiment, the same effects as those of the first embodiment described above can be obtained.
  • the catheter and the catheter set according to the present invention are not limited to the above-described embodiments, and various configurations can be adopted without departing from the gist of the present invention.

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Abstract

La présente invention concerne un ensemble cathéter (10A) pourvu d'un cathéter (12) et d'un arbre d'extension (14) pour étendre la longueur effective du cathéter. Ledit cathéter (12) possède un corps tubulaire (20) et un arbre flexible (16) formé pour être plus mince et plus long que le corps tubulaire (20). L'arbre (16) comporte une partie de connexion (24) prévue sur une extrémité proximale d'un corps d'arbre (22) et à laquelle l'arbre d'extension (14) peut être connecté.
PCT/JP2015/054919 2014-03-18 2015-02-23 Cathéter et ensemble cathéter Ceased WO2015141392A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2016508617A JP6633513B2 (ja) 2014-03-18 2015-02-23 カテーテル及びカテーテルセット

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014-054368 2014-03-18
JP2014054368 2014-03-18

Publications (1)

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WO2015141392A1 true WO2015141392A1 (fr) 2015-09-24

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PCT/JP2015/054919 Ceased WO2015141392A1 (fr) 2014-03-18 2015-02-23 Cathéter et ensemble cathéter

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JP (1) JP6633513B2 (fr)
WO (1) WO2015141392A1 (fr)

Cited By (2)

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CN109310849A (zh) * 2016-08-10 2019-02-05 尼普洛株式会社 支撑导管
WO2020059576A1 (fr) * 2018-09-21 2020-03-26 テルモ株式会社 Cathéter et procédé de traitement utilisant un cathéter

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JP2000279534A (ja) * 1999-01-27 2000-10-10 Kaneka Medeikkusu:Kk バルーンカテーテル装置およびバルーンカテーテルシステム
JP2009508548A (ja) * 2005-09-19 2009-03-05 マンヴァシス 頸動脈分岐部における保護血管形成術及びステント留置術のための装置並びに方法

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JP2009508548A (ja) * 2005-09-19 2009-03-05 マンヴァシス 頸動脈分岐部における保護血管形成術及びステント留置術のための装置並びに方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109310849A (zh) * 2016-08-10 2019-02-05 尼普洛株式会社 支撑导管
WO2020059576A1 (fr) * 2018-09-21 2020-03-26 テルモ株式会社 Cathéter et procédé de traitement utilisant un cathéter
JPWO2020059576A1 (ja) * 2018-09-21 2021-08-30 テルモ株式会社 カテーテル及びカテーテルを用いた治療方法
JP7383625B2 (ja) 2018-09-21 2023-11-20 テルモ株式会社 カテーテル

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