WO2021157053A1 - Cathéter - Google Patents

Cathéter Download PDF

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Publication number
WO2021157053A1
WO2021157053A1 PCT/JP2020/004803 JP2020004803W WO2021157053A1 WO 2021157053 A1 WO2021157053 A1 WO 2021157053A1 JP 2020004803 W JP2020004803 W JP 2020004803W WO 2021157053 A1 WO2021157053 A1 WO 2021157053A1
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WO
WIPO (PCT)
Prior art keywords
catheter
recess
tip
linear
linear portion
Prior art date
Application number
PCT/JP2020/004803
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English (en)
Japanese (ja)
Inventor
久保　和也
誉生 兼子
Original Assignee
朝日インテック株式会社
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 朝日インテック株式会社 filed Critical 朝日インテック株式会社
Priority to JP2021575550A priority Critical patent/JP7307205B2/ja
Priority to PCT/JP2020/004803 priority patent/WO2021157053A1/fr
Publication of WO2021157053A1 publication Critical patent/WO2021157053A1/fr

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    • 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
    • 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
    • A61M29/00—Dilators with or without means for introducing media, e.g. remedies

Definitions

  • the technique disclosed herein relates to a catheter inserted into a blood vessel or the like.
  • a method using a catheter is widely used as a method for treating or inspecting a stenotic part or an occluded part (hereinafter referred to as a "lesion part") in a blood vessel or the like.
  • the tip of the guide wire is a pseudocavity (blood formed in the blood vessel wall separately from the true lumen, which is the original blood flow path).
  • a procedure (called "reentry") may be taken to guide the tip of the guide wire from the false lumen to the true lumen when advancing into the flow path). More specifically, a technician such as a doctor pushes and pulls the guide wire that guides the catheter to break through the blood vessel wall of the false lumen by the tip of the guide wire, and the tip of the guide wire is true from the false lumen. Guide to the cavity. At this time, the tip of the catheter may be displaced to a position unintended by the operator.
  • the reaction force generated by pushing and pulling the guide wire causes the tip of the catheter to be displaced to a position unintended by the operator, resulting in insufficient support of the guide wire by the catheter and difficulty in reentry. As a result, there is a risk of expanding the false cavity.
  • a catheter provided with a fixing member for fixing the tip of the catheter to a predetermined position such as a blood vessel wall has been conventionally used (for example, Patent Document). 1).
  • the fixing member is arranged on the outer peripheral side of the catheter body.
  • the fixing member includes a tip-side linear portion and a proximal end-side linear portion fixed to the proximal end side of the distal end-side linear portion.
  • the distal end-side linear portion and the proximal end-side linear portion form a linear shape substantially parallel to the axial direction of the catheter body.
  • the tip lateral line is made of, for example, a flexible material (eg, metal).
  • the distal end side of the distal lateral line is fixed to the catheter body.
  • the proximal lateral line is configured to be displaceable in the axial direction of the catheter body.
  • the catheter is fixed to the blood vessel wall by deforming the distal lateral line portion and contacting the blood vessel wall in this way.
  • the distal end side of the distal end lateral portion of the fixing member in the normal form in which the distal end lateral portion has a linear shape substantially parallel to the axial direction of the catheter body, for example, it is bent.
  • the inner peripheral side portion of the distal line may bend and be compressed in the axial direction of the catheter body to bend.
  • the distal lateral line portion may be deformed so as to protrude in the radial direction of the catheter body and may come into contact with the blood vessel wall.
  • the distal linear portion may damage living tissues such as blood vessels while advancing the catheter to the target location, or foreign matter may be caught (stacked) on the distal linear portion. ..
  • the catheter is forcibly operated in the stacked state when it is stacked, the distal lateral line is damaged in the body, and the damaged distal linear is damaged or used in combination with other devices such as blood vessels. May hurt.
  • This specification discloses a technique capable of solving the above-mentioned problems.
  • the catheter disclosed in the present specification is arranged at a position where the catheter main body, the non-displacement portion arranged on the outer peripheral side of the catheter main body, and the non-displacement portion and the catheter main body are opposed to each other in the axial direction.
  • the non-displacement portion is provided with a plurality of linear portions provided in parallel with the catheter main body between the non-displacement portion and the displacement portion, and the non-displacement portion is a recess that opens toward the displacement portion.
  • One end of the linear portion is fixed to the displacement portion, the other end is movably housed in the recess, and is housed in the recess and the recess. There is a gap between the linear portion and the other end.
  • the other end of the linear portion is movably housed in the recess, and between the recess and the other end of the linear portion housed in the recess.
  • the line The other end of the shaped portion is suppressed from being pressed against the bottom surface of the recess, and thus the linear portion is compressed in the axial direction of the catheter against the intention of the operator, and the linear portion is said. Deformation to project in the radial direction of the catheter is suppressed. Therefore, it is possible to prevent the linear portion from damaging a living tissue such as a blood vessel due to an unintended deformation of the linear portion.
  • the recess may be formed integrally with the catheter body. According to this catheter, the number of members can be reduced as compared with a configuration in which the recess is formed of a member different from the catheter main body and the above-mentioned members constituting the catheter.
  • the recess is formed separately from the catheter body, and has the same strength as the material constituting the catheter body, or is stronger than the material constituting the catheter body. It may be composed of expensive materials. According to this catheter, it is possible to suppress damage to the non-displaced portion as compared with a configuration in which the recess is integrally formed with the catheter body.
  • the catheter disclosed in the present specification is arranged at a position facing the catheter main body, the non-displacement portion arranged on the outer peripheral side of the catheter main body, and the non-displacement portion in the axial direction of the catheter main body.
  • the displacement portion is provided with a plurality of linear portions provided in parallel with the catheter main body between the non-displacement portion and the displacement portion, and the displacement portion is a recess that opens toward the non-displacement portion.
  • One end of the linear portion is fixed to the non-displacement portion, the other end is movably housed in the recess, and is housed in the recess and the recess. There is a gap between the linear portion and the end portion.
  • the preferred form is the same as the above (2) and (3).
  • the other end of the linear portion is movably housed in the recess, and between the recess and the other end of the linear portion housed in the recess.
  • the line The other end of the shaped portion is suppressed from being pressed against the bottom surface of the recess, and thus the linear portion is compressed in the axial direction of the catheter against the intention of the operator, and the linear portion is said. Deformation to project in the radial direction of the catheter is suppressed. Therefore, it is possible to prevent the linear portion from damaging a living tissue such as a blood vessel due to an unintended deformation of the linear portion.
  • the technique disclosed in the present specification can be realized in various forms, for example, a catheter and a method for manufacturing the same.
  • Top view showing the state when the catheter in the comparative example is bent Top view showing the state when the catheter in the first embodiment is bent.
  • FIG. 1 is a plan view schematically showing the appearance configuration of the catheter 100 in the first embodiment in the first embodiment.
  • the first form is a normal form in which no external force (more specifically, an external force in the circumferential direction of the catheter 100) is applied to the catheter 100 (hereinafter, the same applies).
  • FIG. 2 is a side view schematically showing the appearance configuration of the catheter 100 in the first embodiment in the first embodiment.
  • XYZ axes orthogonal to each other for specifying the direction are shown, and in each figure, the positive side of the Z axis is the distal end side (distal side) inserted into the body.
  • the negative direction side of the Z axis is the proximal end side (proximal side) operated by a technician such as a doctor.
  • proximal side proximal side
  • a portion extending halfway from the tip end side of the catheter 100 toward the proximal end side is referred to as a "tip portion”.
  • base end portion a portion extending halfway from the proximal end of the catheter 100 toward the distal end side.
  • the catheter 100 is shown to be in a linear shape substantially parallel to the Z-axis direction as a whole, but the catheter 100 is flexible enough to be curved. Further, in each drawing, the illustration of a part of the catheter 100 (a part of the catheter main body 10 and a handle portion) is omitted. This point is the same for the figures after FIG.
  • the catheter 100 of the present embodiment is a medical treatment tool inserted into the body, for example, in percutaneous coronary angioplasty (PCI: Percutaneous Coronary Intervention), a device (balloon) for dilating an occluded coronary artery of the heart. It can be used for the purpose of supporting a guide wire that guides a stent, etc.).
  • the catheter 100 of the present embodiment can also be used as a marker indicating a direction when the inside of a blood vessel is imaged by intravascular ultrasound (IVUS).
  • IVUS intravascular ultrasound
  • the catheter 100 includes a catheter body 10 and a first member 20.
  • a handle portion (not shown) operated by a technician is connected to the base end of the catheter body 10.
  • the catheter body 10 includes a catheter tube 11 and a tip tip 12 connected to the distal end side of the catheter tube 11.
  • the tip tip 12 is joined to the tip side of the catheter tube 11 by, for example, welding, welding, or an adhesive.
  • the catheter tube 11 is a tubular member mainly made of a resin material.
  • the catheter tube 11 has a multi-layer structure, and the inner layer 110, the braid (not shown), and the outer layer 111 are ordered from the inside in the radial direction (Y-axis direction in FIG. 1) of the catheter body 10. And have.
  • the braid is composed of, for example, a metal material such as stainless steel, Ni—Ti alloy, piano wire, or tungsten, or a resin material such as polyamide, polyamide elastomer, polyimide, or polyetheretherketone (PEEK).
  • the outer layer 111 is made of a resin material such as polyamide, polyamide elastomer, polyester, or polyurethane.
  • the tip tip 12 is a tubular member mainly made of a resin material such as polyurethane.
  • the detailed configuration around the first member 20 and the first member 20 will be described below.
  • the first member 20 is arranged on the outer peripheral side of the catheter body 10.
  • the first member 20 includes two linear portions 21, an annular portion 22 (an example of a displacement portion within the scope of claims), and two operation wires 23.
  • the two linear portions 21, the annular portion 22, and the two operation wires 23 may be integrally formed or may be formed by joining separate bodies.
  • the linear portion 21 is made of a flexible material, such as a metal material such as Ni—Ti alloy or stainless steel, or a resin material such as PEEK, the annular portion 22 and the operating wire.
  • Reference numeral 23 is made of a metal material such as stainless steel.
  • Each linear portion 21 has a linear shape, and is provided in parallel with the catheter main body 10 between the distal end tip 12 provided on the outer peripheral side of the distal end portion of the catheter main body 10 and the annular portion 22. There is.
  • the annular portion 22 is arranged at a position facing the tip tip 12 on the outer peripheral side of the catheter main body 10.
  • the base end side (in the present embodiment, the Z-axis negative direction side) of the two linear portions 21 is fixed to the annular portion 22.
  • the annular portion 22 is arranged so as to cover a part of the outer circumference of the tip portion of the catheter body 10.
  • the annular portion 22 and the two operating wires 23 are arranged so as to be displaceable between the first position and the second position, which will be described later, along the outer peripheral surface of the catheter body 10.
  • Each operation wire 23 is connected to the base end side of the annular portion 22.
  • two lumens (not shown) extending in the axial direction of the catheter body 10 are formed over the entire length of the catheter tube 11, and each operation wire 23 is formed by these two lumens. It is inserted into each of the lumens. In each of these lumens, the operating wire 23 extends to the proximal end side of the catheter 100 (in other words, around the handle portion described above).
  • the tip tip 12 (an example of the non-displacement portion in the claims) is provided at the tip end portion of the catheter body 10.
  • the tip tip 12 is formed with the same number of recesses R (two in this embodiment) as the number of linear portions 21.
  • the recess R is located closer to the distal end side of the catheter body 10 than the annular portion 22, and opens toward the proximal end side of the catheter 100. As shown in FIGS.
  • first position in the first embodiment in which the annular portion 22 is located at a predetermined position (hereinafter, referred to as “first position”) on the catheter body 10, the end portion of the linear portion 21
  • the 210 is housed in the recess R, and there is a gap between the bottom surface of the recess R and the end 210 of the linear portion 21 housed in the recess R.
  • FIGS. 1 and 2 show the appearance configuration of the catheter 100 in the first embodiment in the first embodiment.
  • FIG. 3 is a plan view schematically showing the appearance configuration of the catheter 100 in the second embodiment in the first embodiment.
  • FIG. 4 is a plan view showing a state when the catheter CE in the comparative example is bent
  • FIG. 5 is a plan view showing a state when the catheter 100 in the first embodiment is bent.
  • 3 to 5 show the configurations of the catheter 100 and CE in the X-axis forward view.
  • the catheter 100 of the present embodiment when the catheter 100 having the first form (normal form shown in FIGS. 1 and 2) is inserted into the blood vessel and advanced along the blood vessel passage, the circumference of the catheter 100 is peripheral. The catheter 100 remains in its first form, as little external force is applied in the direction.
  • the two operation wires 23 are moved from the base end to the tip side of the catheter body 10.
  • second position a predetermined position on the catheter body 10
  • the annular portion 22 is displaced from the first position to the second position.
  • the catheter 100 has a second form as shown in FIG. Therefore, the linear portion 21 bends when the end portion 210 is pressed against the bottom surface of the recess R, and is deformed so as to project in the radial direction of the catheter 100.
  • the shape of the cross section of the linear portion 21 (the cross section orthogonal to the axial direction of the catheter body 10) is not particularly limited, but is preferably circular or polygonal, and more preferably substantially rectangular.
  • both ends of the two linear portions 21 are fixed to the catheter body 10J (the catheter body 10J includes a tip tip 12J in which the recess R is not formed).
  • the tip side of the catheter CE is bent, so that the distance between both ends of the linear portion 21 is shortened, and the linear portion 21 is used. Is flexed by being compressed in the axial direction of the catheter CE, and may be deformed so as to protrude in the radial direction of the catheter CE. Therefore, contrary to the intention of the technician, the linear portion 21 comes into contact with a living tissue such as a blood vessel.
  • the linear portion 21 may damage the living tissue such as a blood vessel while the catheter CE is being advanced to the target location, or the linear portion 21 may be caught (stacked) by a foreign substance.
  • the linear portion 21 is damaged in the body, and the damaged linear portion 21 damages living tissues such as blood vessels and other devices used in combination. There is a risk of stacking.
  • the linear portion 21 has an annular portion 22 on both end sides thereof, and two annular portions 22 are provided. It is conceivable that the first member 20J fixed to the catheter body 10 via the catheter body 10 is used. However, in this catheter CE, since the linear portion 21 also includes an annular portion 22 on the distal end side of the catheter body 10J, the tip of the catheter CE is compared with a catheter having no annular portion 22 on the distal end side of the catheter body 10J. It is difficult to ensure the flexibility of the part.
  • the linear portion 21 is housed in the recess R formed in the tip tip 12, so that the linear portion 21 projects in the radial direction of the catheter 100. It is not necessary for the linear portion 21 to have the annular portion 22 on the distal end side of the catheter body 10 because the configuration is such that the deformation is suppressed. Therefore, according to the catheter 100 of the present embodiment, as described above, the flexibility of the tip portion of the catheter 100 can be ensured as compared with the catheter CE having the annular portions 22 at both ends of the linear portion 21.
  • the end 210 of the linear portion 21 is housed in the recess R, and the bottom surface of the recess R and the linear portion 21 There is a gap between the end 210 and the end 210.
  • the end portion 210 of the linear portion 21 is formed. Pressing against the bottom surface of the recess R is suppressed, and as the catheter 100 moves through the bent blood vessel, the linear portion 21 bends against the intention of the operator and deforms so as to protrude in the radial direction of the catheter 100.
  • the catheter 100 of the first embodiment is located at a position facing the catheter main body 10, the tip tip 12 arranged on the outer peripheral side of the catheter main body 10, and the tip tip 12 on the outer peripheral side of the catheter main body 10. It includes an arranged annular portion 22 and a plurality of linear portions 21 provided in parallel with the catheter body 10 between the tip tip 12 and the annular portion 22.
  • the tip tip 12 has a recess R that opens toward the proximal end side of the catheter 100.
  • the end 210 of the linear portion 21 is movably housed in the recess R. There is a gap between the bottom surface of the recess R and the end 210 of the linear portion 21.
  • the catheter 100 of the present embodiment when the operator intends to fix the tip of the catheter 100 to the blood vessel wall, the first embodiment in the normal state in which an external force in the circumferential direction of the catheter 100 is not applied.
  • the position of the annular portion 22 is displaced so that the distance between the annular portion 22 and the tip tip 12 is shorter than the distance between the annular portion 22 and the tip tip 12 in the first embodiment.
  • the catheter 100 has a second form as shown in FIG.
  • the end 210 of the linear portion 21 is in contact with the bottom surface of the recess R, and the linear portion 21 is deformed so as to project in the radial direction of the catheter 100. is doing.
  • the linear portion 21 is deformed so as to project in the radial direction of the catheter 100 and comes into contact with the blood vessel wall, whereby the tip end portion of the catheter 100 can be fixed to the blood vessel wall.
  • the end 210 of the linear portion 21 is housed in the recess R, and the bottom surface of the recess R and the end of the linear portion 21 housed in the recess R. There is a gap between it and 210.
  • the end portion 210 of the linear portion 21 is pressed against the bottom surface of the recess R.
  • the linear portion 21 is suppressed from being deformed so as to protrude in the radial direction of the catheter 100, contrary to the intention of the operator.
  • the linear portion 21 bends against the intention of the operator and is deformed so as to protrude in the radial direction of the catheter 100, and the end portion 210 of the linear portion 21 is deformed. Damage to the recess R due to being pressed against the bottom surface of the recess R can be suppressed.
  • the end 210 of the linear portion 21 is 40% of the total length of the recess R. It is preferable that the catheter is inserted up to the above position. Further, for example, when the distance between the annular portion 22 and the bottom surface of the recess R is shortened due to the bending of the tip portion of the catheter 100, the end portion 210 of the linear portion 21 is pressed against the bottom surface of the recess R. From the viewpoint of suppressing the above, it is preferable that the end 210 of the linear portion 21 is inserted up to a region of 60% or less of the total length of the recess R. The same applies to the second and subsequent embodiments.
  • the concave portion R is formed integrally with the catheter main body 10. Therefore, the number of members can be reduced as compared with the configuration in which the recess R is formed of a member different from the above-mentioned members constituting the catheter main body 10 and the catheter 100.
  • the tip tip 12 is located closer to the tip of the catheter body 10 than the annular portion 22. Therefore, when the operator intends to fix the tip of the catheter 100 to the blood vessel wall, in the first embodiment, the annular portion 22 is moved from the base end of the catheter 100 toward the tip side.
  • the catheter 100 is in a second form deformed so as to project in the radial direction of the catheter 100. Therefore, in the catheter 100 of the present embodiment, the linear portion 21 is easily catheterized as compared with the configuration in which the operation wire 23 is pulled from the tip end side of the catheter 100 toward the proximal end side to form the second embodiment. It can be a second form deformed so as to project in the radial direction of 100.
  • FIG. 6 is a plan view schematically showing the appearance configuration of the catheter 100A in the first embodiment (normal modes shown in FIGS. 6 and 7) in the second embodiment.
  • FIG. 7 is a side view schematically showing the appearance configuration of the catheter 100A shown in FIG. 6 in the first embodiment.
  • FIG. 8 is a plan view schematically showing the appearance configuration of the catheter 100A in the second embodiment in the second embodiment. 6 and 8 show the configuration of the catheter 100A in the X-axis forward view, and FIG. 7 shows the configuration of the catheter 100A in the Y-axis forward view. As shown in FIGS.
  • the configuration of the catheter 100A of the second embodiment is a recess that accommodates the end 210 of the linear portion 21 as compared with the configuration of the catheter 100 of the first embodiment described above.
  • the members that make up RA are different.
  • the non-displacement portion in the claims is composed of the tubular member 30.
  • the catheter 100A in the second embodiment is provided with the same number of tubular members 30 (two in the present embodiment) constituting the recess RA for accommodating the end 210 of each linear portion 21.
  • the tubular member 30 is located closer to the distal end side of the catheter body 10A than the annular portion 22.
  • the tubular member 30 is made of a resin material such as a polyimide resin.
  • the tubular member 30 is connected to the distal end side of the catheter body 10A (in this embodiment, the distal end of the catheter tube 11).
  • the tubular member 30 is joined to the distal end side of the catheter body 10A by, for example, welding, welding, adhesive, or the like.
  • the tubular member 30 which is a separate body from the tip tip 12A is provided as a member constituting the recess RA, the recess RA is not formed in the tip tip 12A.
  • the annular portion 22 (an example of the displacement portion in the claims) is arranged at a position facing the tubular member 30 on the outer peripheral side of the catheter body 10A.
  • the linear portion 21 is provided in parallel with the catheter main body 10A between the tubular member 30 provided on the outer peripheral side of the catheter main body 10A and the annular portion 22.
  • the end 210 of the linear portion 21 is movably housed in the recess RA and is accommodated. , There is a gap between the bottom surface of the recess RA and the end 210 of the linear portion 21.
  • the end portion 210 of the linear portion 21 is in contact with the bottom surface of the recess RA, and the first member 20
  • the linear portion 21 of the catheter 100A is deformed so as to project in the radial direction of the catheter 100A.
  • the operation of the catheter 100A in the second embodiment is the same as the operation of the catheter 100 in the first embodiment. Therefore, the detailed description thereof will be omitted.
  • the catheter 100A of the second embodiment includes a catheter main body 10A, a tubular member 30 arranged on the outer peripheral side of the catheter main body 10A, an annular portion 22 arranged at a position facing the tubular member 30, and a tubular member.
  • a plurality of linear portions 21 provided in parallel with the catheter main body 10A between the 30 and the annular portion 22 are provided.
  • the tubular member 30 has a recess RA that opens toward the proximal end side of the catheter 100A.
  • the end 210 of the linear portion 21 is movably housed in the recess RA. There is a gap between the bottom surface of the recess RA and the end 210 of the linear portion 21.
  • the annular portion 22 when the operator intends to fix the tip of the catheter 100A to the blood vessel wall, the annular portion 22 is in the first embodiment in the normal state in which no external force is applied to the catheter 100A.
  • the position of the annular portion 22 is displaced so that the distance between the and the tubular member 30 is shorter than the distance between the tubular member 30 and the tubular member 30 in the first embodiment.
  • the catheter 100A becomes the second form as shown in FIG.
  • the tip portion of the catheter 100A can be fixed to the blood vessel wall by bending the linear portion 21 and deforming the catheter 100A so as to project in the radial direction.
  • the end 210 of the linear portion 21 is housed in the recess RA, and there is a gap between the bottom surface of the recess RA and the end 210 of the linear portion 21. ..
  • the linear portion 21 is used for the same reason as in the first embodiment. Is suppressed from being compressed in the axial direction of the catheter 100A, and when the catheter 100A advances in the bent blood vessel, the linear portion 21 is deformed so as to protrude in the radial direction of the catheter 100A against the intention of the operator.
  • the catheter 100A of the present embodiment the deformation of the linear portion 21 contrary to the intention of the operator and the damage of the concave portion RA due to the end portion 210 of the linear portion 21 being pressed against the bottom surface of the concave portion RA are prevented. It can be suppressed.
  • the recess RA is formed separately from the catheter body 10A, and has the same strength as the material constituting the catheter body 10A, or is stronger than the material constituting the catheter body 10A. Is composed of high material.
  • the recess RA may be damaged by being pressed against the end 210 of the linear portion 21.
  • the concave portion RA is made of a material having the same strength as the material constituting the catheter main body 10A or a material having high strength, the concave portion RA is integrated with the catheter main body 10A. As compared with the formed configuration, it is possible to further prevent the recess RA from being damaged as described above.
  • FIG. 9 is a plan view schematically showing the appearance configuration of the catheter 100B in the first embodiment (normal mode shown in FIG. 9) in the third embodiment.
  • FIG. 10 is a plan view schematically showing the appearance configuration of the catheter 100B in the second embodiment in the third embodiment. 9 and 10 show the configuration of the catheter 100B in the X-axis forward view.
  • the configuration of the catheter 100B of the third embodiment includes the second member 40 as compared with the configuration of the catheter 100 of the first embodiment described above, and the first member is provided. The difference is that a third member 50 is provided instead of the member 20.
  • the second member 40 includes an annular portion 41 and two linear portions 42.
  • the linear portion 42 of the second member 40 is made of a flexible material, for example, a metal material such as Ni—Ti alloy or stainless steel, or a resin material such as polyetheretherketone (PEEK), and is cyclic.
  • the portion 41 is made of a metal material such as stainless steel.
  • the annular portion 41 of the present embodiment is an example of a non-displacement portion within the scope of claims, and is arranged so as to cover a part of the outer circumference of the distal end side of the catheter body 10B.
  • the annular portion 41 is joined to the distal end side of the catheter body 10B by, for example, welding, welding, an adhesive, or the like.
  • Each linear portion 42 has a linear shape, and is provided in parallel with the catheter main body 10B between the annular portion 41 provided on the outer peripheral side of the catheter 100B and the annular portion 51.
  • the third member 50 includes an annular portion 51 and two operation wires 52.
  • the annular portion 51 and the two operation wires 52 are integrally formed.
  • the operating wire 52 is made of a material such as Ni—Ti alloy or stainless steel.
  • the annular portion 51 of the present embodiment is an example of a displacement portion within the scope of claims, is provided so as to cover a part of the outer circumference of the catheter main body 10B, and is arranged at a position facing the annular portion 41 on the catheter main body 10B. Has been done.
  • the annular portion 51 is formed with the same number of recesses RB as the number of linear portions 42. Each recess RB opens toward the proximal end side of the catheter 100B.
  • the annular portion 51 is provided so as to be displaceable along the outer peripheral surface of the catheter body 10B. Therefore, the annular portion 51 can be displaced between the first position and the second position, which will be described later, in the axial direction of the catheter body 10B.
  • the annular portion 51 is located closer to the proximal end side of the catheter body 10B than the annular portion 41.
  • first position a predetermined position
  • the end portion 421 of the linear portion 42 moves into the recess RB. It is accommodated as much as possible, and there is a gap between the bottom surface of the recess RB and the end 421 of the linear portion 42.
  • each operation wire 52 is connected to the base end side of the annular portion 51 by, for example, welding, welding, adhesive, or the like.
  • the outer layer 111 of the catheter tube 11 is formed with two lumens (not shown) extending in the axial direction of the catheter body 10B, and each operation wire 52 is inserted into each of the two lumens. There is.
  • the operation wire 52 is made of a high-strength material (for example, a metal material such as stainless steel) up to the proximal end side of the catheter 100 (in other words, around the position where the operator operates the handle portion described above). It is extending.
  • FIG. 9 shows the appearance configuration of the catheter 100B in the third embodiment in the first form (the normal form shown in FIGS. 6 and 7).
  • FIG. 10 is a plan view schematically showing the appearance configuration of the catheter in the second embodiment in the third embodiment.
  • FIG. 10 shows the configuration of the catheter 100B in the X-axis forward view.
  • the catheter 100B of the present embodiment similarly to the first embodiment and the like, when the catheter 100B forming the first embodiment is inserted into a blood vessel and the tip of the catheter body 10 is advanced along the blood vessel passage, the catheter is used. 100B remains in the first form.
  • the operation wire 52 connected to the annular portion 51 is inserted from the tip of the catheter 100B.
  • the annular portion 51 is displaced (pulled) from the tip of the catheter 100B toward the proximal end side.
  • the annular portion 51 is displaced so that the distance between the annular portion 51 and the bottom surface of the recess RB is shorter than that in the first form (hereinafter, referred to as “second position”).
  • the catheter 100B becomes the second form as shown in FIG.
  • the annular portion 51 is located at the second position, the end portion 421 of the linear portion 42 is in contact with the bottom surface of the recess RB, and the linear portion 42 is a catheter. It is deformed so as to project in the radial direction of 100B. Thereby, the linear portion 42 protruding in the radial direction of the catheter 100 comes into contact with the blood vessel wall, so that the tip end portion of the catheter 100B can be fixed to the blood vessel wall.
  • the shape of the cross section of the linear portion 42 (the cross section orthogonal to the axial direction of the catheter body 10B) is not particularly limited, but is preferably circular or polygonal, and is preferably substantially rectangular. More preferred.
  • the catheter 100B in the first embodiment, for example, when the catheter 100B is advanced along the bent vascular passage, the catheter 100B is bent and the annular portion 51 is bent.
  • the linear portion 42 may be compressed and flexed in the axial direction of the catheter body 10B, and may be deformed so as to project in the radial direction of the catheter 100B. Therefore, in this configuration, contrary to the intention of the technician, the deformed linear portion 42 comes into contact with the blood vessel wall, so that the linear portion 42 is a living body such as a blood vessel while advancing the catheter 100B to the target location.
  • the end portion 421 of the linear portion 42 is housed in the concave portion RB and is aligned with the bottom surface of the concave portion RB. There is a gap between the shape portion 42 and the end portion 421. As a result, for example, when the tip portion of the catheter 100B is bent and the distance between the annular portion 51 and the recess RB is shortened, the end portion 421 of the linear portion 42 is pressed against the bottom surface of the recess RB.
  • the catheter 100B of the present embodiment includes a catheter main body 10B, an annular portion 41 arranged on the outer peripheral side of the catheter main body 10B, an annular portion 51 arranged at a position facing the annular portion 41, and an annular portion 41 and an annular portion.
  • a plurality of linear portions 42 provided in parallel with the catheter main body 10B are provided between the 51 and the catheter body.
  • the annular portion 51 has a recess RB that opens toward the proximal end side of the catheter 100B.
  • the end portion 421 of the linear portion 42 is movably housed in the recess RB. There is a gap between the bottom surface of the recess RB and the end 421 of the linear portion 42 housed in the bottom surface of the recess RB.
  • the annular portion 51 is in the first embodiment in the normal state in which no external force is applied to the catheter 100B. Is displaced in the axial direction of the catheter 100B so as to be shorter than the distance between the annular portion 51 and the recess RB. As a result, the catheter 100B becomes the second form as shown in FIG.
  • the end portion 421 of the linear portion 42 is in contact with the bottom surface of the recess RB, and the linear portion 42 is bent so as to project in the radial direction of the catheter 100B. It is deformed.
  • the linear portion 42 is deformed so as to project in the radial direction of the catheter 100B and comes into contact with the blood vessel wall, whereby the tip end portion of the catheter 100B can be fixed to the blood vessel wall.
  • the end portion 421 of the linear portion 42 is housed in the recess RB, and there is a gap between the bottom surface of the recess RB and the end portion 421 of the linear portion 42. There is.
  • the linear portion 42 is pressed against the bottom surface of the concave portion RB by bending the tip portion of the catheter 100B, and the linear portion 42 is pressed against the intention of the operator.
  • the configurations of the catheters 100, 100A, and 100B in the above embodiment are merely examples and can be variously deformed.
  • the shape and number of the linear portions 21 and 42 can be variously changed.
  • the shapes of the linear portions 21 and 42 are not limited to the linear shape, and may be, for example, a hollow tubular shape.
  • the cross-sectional shape and the number of the recesses R, RA, and RB can be changed in various ways.
  • the cross-sectional shape of the recesses R, RA, and RB is not limited to a circle, and may be a polygon, an ellipse, or an arc.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Pulmonology (AREA)
  • Biophysics (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

L'invention concerne un cathéter muni d'un élément de fixation destiné à fixer une section distale du cathéter à une paroi de vaisseau sanguin ou analogue, la fixation de la section distale du cathéter à la paroi de vaisseau sanguin ou analogue, contre la volonté d'un chirurgien, étant supprimée. Ce cathéter est muni d'un corps de cathéter, d'une section fixe disposée sur le côté périphérique extérieur du corps de cathéter, d'une section mobile disposée à une position faisant face à la section fixe, et d'une pluralité de sections linéaires disposées parallèlement au corps de cathéter entre la section fixe et la section mobile. La section fixe comprend une section renfoncée qui s'ouvre vers la section mobile. Les sections d'extrémité des sections linéaires sont logées de manière mobile dans la section renfoncée. Un espace est prévu entre la section renfoncée et les sections d'extrémité des sections linéaires logées dans la section renfoncée.
PCT/JP2020/004803 2020-02-07 2020-02-07 Cathéter WO2021157053A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2021575550A JP7307205B2 (ja) 2020-02-07 2020-02-07 カテーテル
PCT/JP2020/004803 WO2021157053A1 (fr) 2020-02-07 2020-02-07 Cathéter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2020/004803 WO2021157053A1 (fr) 2020-02-07 2020-02-07 Cathéter

Publications (1)

Publication Number Publication Date
WO2021157053A1 true WO2021157053A1 (fr) 2021-08-12

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Application Number Title Priority Date Filing Date
PCT/JP2020/004803 WO2021157053A1 (fr) 2020-02-07 2020-02-07 Cathéter

Country Status (2)

Country Link
JP (1) JP7307205B2 (fr)
WO (1) WO2021157053A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3108595A (en) * 1960-08-08 1963-10-29 Alfred P Overment Retention catheter
JP2011505201A (ja) * 2007-11-30 2011-02-24 クック・インコーポレイテッド 脈管療法のための方法及び装置
WO2017079153A1 (fr) * 2015-11-02 2017-05-11 University Of Maryland, Baltimore Appareil et procédés d'ancrage distal pour réparation de valvule mitrale

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3108595A (en) * 1960-08-08 1963-10-29 Alfred P Overment Retention catheter
JP2011505201A (ja) * 2007-11-30 2011-02-24 クック・インコーポレイテッド 脈管療法のための方法及び装置
WO2017079153A1 (fr) * 2015-11-02 2017-05-11 University Of Maryland, Baltimore Appareil et procédés d'ancrage distal pour réparation de valvule mitrale

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JP7307205B2 (ja) 2023-07-11

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