WO2017021993A1 - Tube à fentes et tige de traitement médical utilisée dans celui-ci - Google Patents

Tube à fentes et tige de traitement médical utilisée dans celui-ci Download PDF

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Publication number
WO2017021993A1
WO2017021993A1 PCT/JP2015/003864 JP2015003864W WO2017021993A1 WO 2017021993 A1 WO2017021993 A1 WO 2017021993A1 JP 2015003864 W JP2015003864 W JP 2015003864W WO 2017021993 A1 WO2017021993 A1 WO 2017021993A1
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WO
WIPO (PCT)
Prior art keywords
slit
pipe
base portion
pipe body
wedge shape
Prior art date
Application number
PCT/JP2015/003864
Other languages
English (en)
Japanese (ja)
Inventor
恒哉 西村
創紀 滝野
Original Assignee
マルホ発條工業株式会社
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 マルホ発條工業株式会社 filed Critical マルホ発條工業株式会社
Priority to PCT/JP2015/003864 priority Critical patent/WO2017021993A1/fr
Publication of WO2017021993A1 publication Critical patent/WO2017021993A1/fr

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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

Definitions

  • the present invention relates to a slit pipe having a slit formed on the surface, and a medical shaft member using the slit pipe.
  • a slit is formed spirally with respect to the longitudinal direction in a region other than both ends in the longitudinal direction, and the slit is formed in the middle of the spiral slit.
  • a guide wire is disclosed that includes a slit pipe in which a plurality of girders are formed so as to straddle a slit, and a core shaft whose tip is covered with the slit pipe. According to such a conventional guide wire, it is possible to provide a guide wire that can be easily manufactured with improved torque transmission in at least one-direction rotation at the distal end portion thereof.
  • the above prior art has the following problems. That is, when a guide wire is used, a rotational torque is repeatedly applied to the slit pipe that covers the surface of the tip portion. At this time, the plurality of girders provided to straddle the slit of the slit pipe are broken. Stress is repeatedly applied in the direction of the movement. If it does so, the part of the said girder will be fatigued by long-term use, and in the worst case, there is a possibility that the girder breaks and the guide wire cannot be used.
  • the object of the present invention is to achieve both the minimization of expansion and contraction in the longitudinal direction and extremely high flexibility, and even when repeated rotational torque is given, the stress due to such torque does not concentrate on a specific part, It is an object of the present invention to provide a slit pipe in which troubles such as local fatigue and breakage are reduced, and a highly durable medical shaft member having excellent flexibility and torque transmission using such a slit pipe.
  • the present invention has a slit pipe 10 configured as follows. That is, a hollow cylindrical pipe body 12 and one continuous slit 14 penetrating from the outer surface to the inner surface of the pipe body 12 and spirally provided along the axial direction of the pipe body 12. With.
  • the slit 14 is folded back at the first base portion u1 defining the spiral turning direction and the tip side of the first base portion u1 to form a wedge shape with the first base portion u1.
  • the second skewed portion u2 is folded back at the tip side of the first skewed portion u2 so as to define the spiral turning direction and forms a wedge shape with the first skewed portion u2.
  • a meshing unit U including a base portion u3 and a second oblique portion u4 that is folded back at the distal end side of the second base portion u3 and forms a wedge shape with the second base portion u3 is repeatedly provided.
  • “to form a wedge shape” means, for example, that formed between the first base portion u1 and the first oblique portion u2, the spiral shape of the slit 14 provided in the pipe body 12 is planar.
  • the line segment (L1) including the first base portion u1 and the line segment (L2) including the first oblique portion u2 intersect at an acute angle ( ⁇ 1).
  • the line segment including the first skew portion u2 is also included.
  • (L2) and the line segment (L3) including the second base portion u3 intersect at an acute angle ( ⁇ 2) (hereinafter, the same applies to other “wedge-shaped” portions).
  • the present invention has the following effects. Since the slit 14 is a continuous one and there is no girder or the like in the middle of the slit 14, even when a rotational torque is repeatedly applied to the slit pipe 10, the stress due to the torque is applied to the slit 14 as a whole. It is received by and does not concentrate on a specific part. Further, by providing the engagement unit U as described above in the slit 14, it is possible to improve the torque transmission performance in both directions around the axis of the pipe body 12, and to give high flexibility in the radial direction of the pipe body 12. On the other hand, the twisting of the pipe body 12 and the expansion and contraction in the axial direction can be minimized.
  • the slit 14 is formed in a region other than the longitudinal ends of the pipe body 12. In this case, it is possible to prevent the slit pipe 10 from being unwound from the longitudinal direction end.
  • the meshing unit U having the same shape and the same size is continuously provided on the slit 14 without a gap. In this case, uniform and high flexibility can be imparted to the entire longitudinal direction of the pipe body 12 while minimizing the elongation in the axial direction of the pipe body 12.
  • a further invention of the present invention is a medical shaft member using the slit pipe 10.
  • a conventional medical shaft member using a coil spring as an exterior part problems caused by the coil spring being twisted or expanding and contracting in its axial direction, for example, rotational torque transmission around the coil spring axis It is possible to drastically solve the problem that the performance is reduced.
  • each invention mentioned above adds the specific structure described in embodiment mentioned later.
  • the present invention it is possible to achieve both minimization of expansion and contraction in the longitudinal direction and extremely high flexibility, and even when repeated rotational torque is applied, stress due to such torque does not concentrate on a specific portion, and local fatigue or It is possible to provide a slit pipe capable of preventing breakage, and a highly durable medical shaft member excellent in flexibility and torque transmission using such a slit pipe.
  • FIG. 1A is the perspective view
  • FIG. 1B is the figure which expand
  • FIG. 2A is a perspective view of the slit pipe according to another embodiment of the present invention
  • FIG. 2A is a perspective view thereof
  • FIG. 2B is a diagram in which a part of the handle of the slit formed on the surface of the slit pipe shown in FIG. It is.
  • FIG. 3A is a perspective view of the slit pipe of another embodiment of the present invention
  • FIG. 3A is a perspective view of the slit pipe of another embodiment of the present invention
  • FIG. 3A is a perspective view thereof
  • FIG. 3B is a diagram in which a part of the handle of the slit formed on the surface of the slit pipe shown in FIG. It is.
  • FIG. 4A is a perspective view of the slit pipe according to another embodiment of the present invention
  • FIG. 4B is a perspective view of the slit pipe
  • FIG. 4B is a diagram in which a part of the handle of the slit formed on the surface of the slit pipe shown in FIG. It is.
  • FIG. 5A is a perspective view of the slit pipe of another embodiment of the present invention
  • FIG. 5B is a perspective view of the slit pipe
  • FIG. 5A is a perspective view of the slit pipe of another embodiment of the present invention
  • FIG. 5B is a perspective view of the slit pipe
  • FIG. 5A is a perspective view of the slit pipe of another embodiment of the present invention
  • FIG. 5B is a perspective view of the slit
  • FIG. 5B is a diagram in which a part of the handle of the slit formed on the surface of the slit pipe shown in FIG. It is.
  • FIG. 6A is a perspective view of the slit pipe of another embodiment of the present invention, FIG. 6A is a perspective view thereof, and FIG. 6B is a diagram in which a part of the handle of the slit formed on the surface of the slit pipe shown in FIG. It is.
  • FIG. 1 is a view showing a slit pipe 10 according to the first embodiment of the present invention
  • FIG. 1A is a perspective view thereof
  • FIG. 1B is a pattern of slits formed on the surface of the slit pipe shown in FIG. 1A. It is the figure which expanded a part of in a plane.
  • the slit pipe 10 of the present invention is generally composed of a pipe body 12 and a slit 14.
  • the pipe body 12 is a hollow cylindrical member made of a metal material with reduced biotoxicity (for example, toxicity to a living body caused by elution of specific ions) (in FIG. 1A, in the middle of the longitudinal direction). Part is omitted).
  • a metal material with suppressed biotoxicity include stainless steel such as SUS304, Ni-Ti alloy, and the like, but any metal material with suppressed biotoxicity can be used. However, it is not limited to these examples.
  • a continuous slit 14 penetrating from the outer surface to the inner surface is formed on the surface of the pipe body 12 by laser processing or etching.
  • the slit 14 is formed in a spiral shape along the axial direction of the pipe body 12 over the entire region except for both longitudinal ends of the pipe body 12.
  • the same shape and the same meshing unit U are continuously and repeatedly provided over the entire slit 14.
  • the meshing unit U is a structural unit in which the pile main bodies 12 facing each other through the slit 14 mesh with each other in a wedge shape, and the first base portion u1, the first oblique portion u2, the second base portion u3, and the second oblique portion. It is roughly composed of the row part u4.
  • the first base portion u1 is a portion that defines the spiral turning direction of the slit 14 in the meshing unit U.
  • the first base portion u1 is provided with a first skew portion u2 that is folded back in the traveling direction of the slit 14 and forms a wedge shape with the first base portion u1.
  • the “wedge shape” formed between the first base portion u1 and the first oblique portion u2 will be described with reference to FIG. 1B.
  • the spiral shape of the slit 14 provided in the pipe body 12 is planar. When the line segment L1 including the first base portion u1 and the line segment L2 including the first oblique portion u2 intersect at an acute angle of the angle ⁇ 1.
  • the traveling direction of the slit 14 is turned back again so as to define the spiral turning direction, and between the first skew portion u2 and the first skew portion u2.
  • a second base part u3 forming a wedge shape is provided.
  • the “wedge shape” formed between the first oblique portion u2 and the second base portion u3 will be described with reference to FIG. 1B.
  • the spiral shape of the slit 14 provided in the pipe body 12 is planar. When the line segment L2 including the first oblique portion u2 and the line segment L3 including the second base portion u3 intersect at an acute angle of angle ⁇ 2.
  • the second base portion u3 and the above-described first base portion u1 both define the spiral direction of the slit 14 so that the line segments L1 and L3 including them are parallel to each other, and as a result.
  • the angle ⁇ 1 and the angle ⁇ 2 formed by the wedge shape formed between these portions and the first oblique portion u2 are equal to each other.
  • a second oblique portion u4 in which the traveling direction of the slit 14 is folded back three times to form a wedge shape with the second base portion u3. It is done.
  • the “wedge shape” formed between the second base portion u3 and the second oblique portion u4 will be described with reference to FIG. 1B.
  • the spiral shape of the slit 14 provided in the pipe body 12 is planar.
  • the line segment L3 including the second base portion u3 and the line segment L4 including the second oblique portion u4 intersect at an acute angle of the angle ⁇ 3.
  • the second base portion u3 and the first base portion u1 of the next meshing unit U adjacent to each other define the turning direction of the slit 14 spiral shape, the line segments L3 and L1 including them are mutually connected. As a result, the angle ⁇ 3 and the angle ⁇ 4 formed by the wedge shape formed between these portions and the second oblique portion u4 are equal to each other.
  • the shape of the meshing unit U configured as described above can be variously changed as shown in FIGS.
  • the first base portion u1 and the first skew portion u2 are the first ones.
  • the second base portion u3 and the second oblique portion u4 are connected by a line segment parallel to the second oblique portion u4, and the second base portion u3 and the second oblique portion u4 are connected by a line segment parallel to the first oblique portion u2.
  • FIG. 2 the first base portion u1 and the first skew portion u2 are the first ones.
  • the second base portion u3 and the second oblique portion u4 are connected by a line segment parallel to the second oblique portion u4, and the second base portion u3 and the second oblique portion u4 are connected by a line segment parallel to the first oblique portion u2.
  • the first skew portion u2 and the second base portion u3 are connected by a line segment parallel to the second skew portion u4, and the second base portion u3 and the second skew portion u4. Are connected by a line segment intersecting with the first oblique portion u2 at an acute angle.
  • the first base portion u1 and the first oblique portion u2 are connected by a line segment parallel to the second oblique portion u4, and the first oblique portion u2 and the second base portion u3 are connected.
  • the second base portion u3 and the second oblique portion u4 are connected by a line segment parallel to the second oblique portion u4, and the second base portion u3 and the second oblique portion u4 are connected by a line segment parallel to the first oblique portion u2.
  • the first base portion u1 and the second base portion u3 are both configured in a V shape.
  • both longitudinal ends of the first base portion u1 and the second base portion u3 are both bent at an obtuse angle
  • the first oblique portion u2 and the second oblique portion u4 are substantially S. It is configured in a letter shape.
  • the size and number of the meshing units U are appropriately set according to the quality required for the slit pipe 10. Specifically, in order to further improve the flexibility of the slit pipe 10, it is only necessary to reduce the size of the meshing unit U and increase the number of meshing units U formed on the slit. Conversely, in order to improve the rigidity of the slit pipe 10, the size of the meshing unit U may be increased and the number of meshing units U formed on the slit may be reduced.
  • the slit pipe 10 configured as described above, when the slit 14 is one continuous one and there are no girders or the like in the middle of the slit pipe 10, a rotational torque is repeatedly applied to the slit pipe 10. Even so, the stress due to such torque is received by the entire slit 14 and does not concentrate on a specific portion. Further, by providing the engagement unit U as described above in the slit 14, it is possible to improve the torque transmission performance in both directions around the axis of the pipe body 12, and to give high flexibility in the radial direction of the pipe body 12. On the other hand, the expansion and contraction in the axial direction of the pipe body 12 can be minimized.
  • the slit pipe 10 when such a slit pipe 10 is applied in place of, or together with, a coil spring that is conventionally used as an exterior part of a medical shaft member, the slit pipe 10 has minimal axial expansion and contraction. Therefore, it is possible to solve the problems inherent in coil springs, such as a decrease in rotational torque transmission due to high axial stretchability, and a highly durable medical shaft with excellent flexibility and torque transmission.
  • a member can be provided.
  • the case where the same unit and the same size as the meshing unit U are continuously and repeatedly formed over the entire slit 14 is shown.
  • uniform and high flexibility can be imparted to the entire longitudinal direction of the pipe body 12 while minimizing the elongation in the axial direction of the pipe body 12.
  • the shape and size of the meshing unit U formed in the slit 14 may be changed, or the meshing unit U formed in the slit 14 may be unevenly distributed according to a predetermined rule.
  • slit pipe 10: slit pipe, 12: pipe body, 14: slit, U: meshing unit, u1: first base portion, u2: first skew portion, u3: second base portion, u4: second skew portion.

Abstract

Ce tube à fentes comprend un corps cylindrique creux (12) et des fentes de raccordement (14) qui traversent le corps de tube (12) de la surface externe à la surface interne, lesdites fentes (14) étant formées selon une configuration hélicoïdale le long de la direction axiale du corps de tube (12). Une unité de maillage (U) est disposée de manière répétée sur les fentes (14), ladite unité (U) comprenant : une première unité de base (u1); une première partie oblique (u2) pour créer une forme de coin, par repliement sur le côté d'extrémité distale de la première unité de base (u1), une seconde unité de base (u3) pour créer une forme de coin, par repliement sur le côté d'extrémité distale du côté d'extrémité distale de la première partie oblique (u2), et une seconde partie oblique (u4) pour créer une forme de coin, par repliement sur le côté d'extrémité distale du côté d'extrémité distale de la première partie oblique (u3).
PCT/JP2015/003864 2015-07-31 2015-07-31 Tube à fentes et tige de traitement médical utilisée dans celui-ci WO2017021993A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2015/003864 WO2017021993A1 (fr) 2015-07-31 2015-07-31 Tube à fentes et tige de traitement médical utilisée dans celui-ci

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2015/003864 WO2017021993A1 (fr) 2015-07-31 2015-07-31 Tube à fentes et tige de traitement médical utilisée dans celui-ci

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WO2017021993A1 true WO2017021993A1 (fr) 2017-02-09

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005501648A (ja) * 2001-09-13 2005-01-20 メドトロニック・ゾーメド・インコーポレーテッド 可撓性の内側管状部材及び可撓性の内側管状部材を有する回転組織切削器具
JP2013176465A (ja) * 2012-02-28 2013-09-09 Terumo Corp 医療器具用可撓管および医療器具
JP2014513585A (ja) * 2011-02-25 2014-06-05 エドワーズ ライフサイエンシーズ コーポレイション 人工心臓弁送達装置
JP2014519376A (ja) * 2011-05-13 2014-08-14 スピレーション インコーポレイテッド 展開カテーテル

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005501648A (ja) * 2001-09-13 2005-01-20 メドトロニック・ゾーメド・インコーポレーテッド 可撓性の内側管状部材及び可撓性の内側管状部材を有する回転組織切削器具
JP2014513585A (ja) * 2011-02-25 2014-06-05 エドワーズ ライフサイエンシーズ コーポレイション 人工心臓弁送達装置
JP2014519376A (ja) * 2011-05-13 2014-08-14 スピレーション インコーポレイテッド 展開カテーテル
JP2013176465A (ja) * 2012-02-28 2013-09-09 Terumo Corp 医療器具用可撓管および医療器具

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