WO2017021993A1 - Slit pipe and medical-treatment shaft member in which same is used - Google Patents

Slit pipe and medical-treatment shaft member in which same is used 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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Prior art keywords
slit
pipe
base portion
pipe body
wedge shape
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PCT/JP2015/003864
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French (fr)
Japanese (ja)
Inventor
恒哉 西村
創紀 滝野
Original Assignee
マルホ発條工業株式会社
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Priority to PCT/JP2015/003864 priority Critical patent/WO2017021993A1/en
Publication of WO2017021993A1 publication Critical patent/WO2017021993A1/en

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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

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

This slit pipe is provided with a hollow cylindrical pipe body (12), and connecting slits (14) that pass though from the outer surface to the inner surface of the pipe body (12), said slits (14) being provided in a helical configuration along the axial direction of the pipe body (12). A meshing unit (U) is provided repeatedly on the slits (14), said unit (U) comprising: a first base unit (u1); a first skewed part (u2) for forming a wedge shape by being folded back on the distal end side of the first base unit (u1), a second base unit (u3) for forming a wedge shape by being folded back on the distal end side of the distal end side of the first skewed part (u2), and a second skewed part (u4) for forming a wedge shape by being folded back on the distal end side of the distal end side of the first skewed part (u3).

Description

スリットパイプ及びこれを用いた医療用シャフト部材Slit pipe and medical shaft member using the same
　本発明は、表面にスリットが形成されたスリットパイプと、このスリットパイプを用いた医療用シャフト部材とに関する。 The present invention relates to a slit pipe having a slit formed on the surface, and a medical shaft member using the slit pipe.
　従来より、血管や消化管或いは尿管等の管状器官や体内組織に挿入して使用するカテーテルや内視鏡処置具と言った医療器具に用いられる医療用シャフト部材として、様々なものが提案されている。
　この医療用シャフト部材の一例として、例えば下記の特許文献１には、長手方向両端部以外の領域に、前記長手方向に対して螺旋状にスリットが形成され、その螺旋状のスリットの途中に前記スリットを跨ぐように複数の桁が形成されたスリットパイプと、先端部がそのスリットパイプで覆われたコアシャフトとで構成されたガイドワイヤが開示されている。
　かかる従来のガイドワイヤによれば、その先端部において、少なくとも一方向回転におけるトルク伝達性を向上させた、簡単に製造することのできるガイドワイヤを提供することができる。 Conventionally, various types of medical shaft members have been proposed as medical shaft members used in medical instruments such as catheters and endoscopic treatment tools that are inserted into tubular organs such as blood vessels, digestive tracts, and ureters, and body tissues. ing.
As an example of this medical shaft member, for example, in Patent Document 1 below, 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.
特開２０１４－１４７４５９号公報JP 2014-147459 A
　しかしながら、上記の先行技術には、次のような問題があった。
　すなわち、ガイドワイヤを使用する際、その先端部表面を覆うスリットパイプには繰り返し回転トルクが与えられるが、この時、スリットパイプのスリットを跨ぐように設けられた複数の桁には、これらを破断する方向に繰り返し応力が与えられる。そうすると、長期間の使用によって当該桁の部分が疲労するようになり、最悪の場合には、桁が破断してガイドワイヤが使用できなくなると言ったおそれがある。 However, 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.
　それゆえに、本発明の目的は、長手方向に対する伸縮の極小化と極めて高い柔軟性とを両立すると共に、繰り返し回転トルクが与えられた場合でも、かかるトルクによる応力が特定の部分に集中せず、局所疲労や破損と言ったトラブルを低減させたスリットパイプと、このようなスリットパイプを用いた柔軟性及びトルク伝達性に優れた耐久性の高い医療用シャフト部材とを提供することである。 Therefore, 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.
　上記の目的を達成するため、本発明は、例えば、図１から図６に示すように、スリットパイプ１０を次のように構成した。
　すなわち、中空筒状のパイプ本体１２と、そのパイプ本体１２の外表面から内表面に向けて貫通し、該パイプ本体１２の軸方向に沿って螺旋状に設けられた連続する１本のスリット１４とを備える。
　上記スリット１４には、螺旋形状の旋回方向を規定する第１ベース部ｕ１と、その第１ベース部ｕ１の先端側にて折り返され、上記第１ベース部ｕ１との間で楔形を形成する第１斜行部ｕ２と、その第１斜行部ｕ２の先端側にて上記螺旋形状の旋回方向を規定するように折り返され、上記第１斜行部ｕ２との間で楔形を形成する第２ベース部ｕ３と、その第２ベース部ｕ３の先端側にて折り返され、上記第２ベース部ｕ３との間で楔形を形成する第２斜行部ｕ４とからなる噛合ユニットＵが、繰り返し設けられる。
　ここで、「楔形を形成する」とは、例えば、第１ベース部ｕ１と第１斜行部ｕ２との間に形成されるものでは、パイプ本体１２に設けられたスリット１４の螺旋形状を平面に展開した際に、第１ベース部ｕ１を含む線分(Ｌ１)と第１斜行部ｕ２を含む線分(Ｌ２)とが鋭角(θ１)にて交差している状態を言う。また、第１斜行部ｕ２と第２ベース部ｕ３との間に形成されるものでは、同様に上記スリット１４の螺旋形状を平面に展開した際に、第１斜行部ｕ２を含む線分(Ｌ２)と第２ベース部ｕ３を含む線分(Ｌ３)とが鋭角(θ２)にて交差している状態を言う（以下、他の「楔形」部分についてもこれらと同様である。）。 In order to achieve the above object, for example, as shown in FIGS. 1 to 6, 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. .
Here, “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 (θ1). Further, in the case formed between the first skew portion u2 and the second base portion u3, when the spiral shape of the slit 14 is similarly developed on a plane, 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 (θ2) (hereinafter, the same applies to other “wedge-shaped” portions).
　本発明は、次の作用効果を奏する。
　スリット１４が連続する１本のものであって、その途中に桁などが存在しないことから、スリットパイプ１０に繰り返し回転トルクが与えられた場合であっても、かかるトルクによる応力は、スリット１４全体で受け止められ、特定の部分に集中しない。
　また、このスリット１４に上述のような噛合ユニットＵを設けることによって、パイプ本体１２の軸回り両方向におけるトルク伝達性を向上させることができるのに加え、パイプ本体１２半径方向に対する高い柔軟性を付与することができ、その一方で、パイプ本体１２の捻じれや軸方向の伸縮を極小化させることができる。 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.
　本発明においては、前記スリット１４が、前記パイプ本体１２の長手方向両端部以外の領域に形成されることが好ましい。
　この場合、スリットパイプ１０長手方向端部からの解れを防止することができる。 In the present invention, it is preferable that 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.
　また、本発明においては、前記スリット１４上において、同形同大の前記噛合ユニットＵが隙間なく連続して設けられることが好ましい。
　この場合、パイプ本体１２の長手方向全体に対して、パイプ本体１２軸方向の伸びを極小化しつつ均一で高い柔軟性を付与することができる。 In the present invention, it is preferable that 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.
　さらに、本発明の更なる発明は、上記スリットパイプ１０を用いたことを特徴とする医療用シャフト部材である。
　この場合、外装部品としてコイルスプリングを用いた従来の医療用シャフト部材において、当該コイルスプリングが捻じれることやその軸方向に伸縮することに起因する問題、例えば、コイルスプリング軸回り方向の回転トルク伝達性が低下すると言ったような問題を抜本的に解決することができる。
　なお、上述した各発明は、後述する実施形態に記載された特有の構成を付加することが好ましい。 Furthermore, a further invention of the present invention is a medical shaft member using the slit pipe 10.
In this case, in 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.
In addition, it is preferable that each invention mentioned above adds the specific structure described in embodiment mentioned later.
　本発明によれば、長手方向に対する伸縮の極小化と極めて高い柔軟性とを両立すると共に、繰り返し回転トルクが与えられた場合でも、かかるトルクによる応力が特定の部分に集中せず、局所疲労や破損を防止することができるスリットパイプと、このようなスリットパイプを用いた柔軟性及びトルク伝達性に優れた耐久性の高い医療用シャフト部材とを提供することができる。 According to 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.
この発明の一実施形態のスリットパイプを表す図で、図１Ａはその斜視図であり、図１Ｂは図１Ａで示すスリットパイプ表面に形成されたスリットの柄の一部を平面に展開した図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a figure showing the slit pipe of one Embodiment of this invention, FIG. 1A is the perspective view, FIG. 1B is the figure which expand | deployed in plane the part of the handle | slit of the slit formed in the slit pipe surface shown in FIG. 1A. is there. この発明の他の実施形態のスリットパイプを表す図で、図２Ａはその斜視図であり、図２Ｂは図２Ａで示すスリットパイプ表面に形成されたスリットの柄の一部を平面に展開した図である。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, and 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. この発明の他の実施形態のスリットパイプを表す図で、図３Ａはその斜視図であり、図３Ｂは図３Ａで示すスリットパイプ表面に形成されたスリットの柄の一部を平面に展開した図である。FIG. 3A is a perspective view of the slit pipe of another embodiment of the present invention, FIG. 3A is a perspective view thereof, and 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. この発明の他の実施形態のスリットパイプを表す図で、図４Ａはその斜視図であり、図４Ｂは図４Ａで示すスリットパイプ表面に形成されたスリットの柄の一部を平面に展開した図である。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, and 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. この発明の他の実施形態のスリットパイプを表す図で、図５Ａはその斜視図であり、図５Ｂは図５Ａで示すスリットパイプ表面に形成されたスリットの柄の一部を平面に展開した図である。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, and 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. この発明の他の実施形態のスリットパイプを表す図で、図６Ａはその斜視図であり、図６Ｂは図６Ａで示すスリットパイプ表面に形成されたスリットの柄の一部を平面に展開した図である。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.
　以下、本発明の一実施形態を図１によって説明する。
　図１は、本発明にかかる第１実施形態のスリットパイプ１０を示す図であり、図１Ａは、その斜視図であり、図１Ｂは、図１Ａで示すスリットパイプ表面に形成されたスリットの柄の一部を平面に展開した図である。
　これらの図が示すように、本発明のスリットパイプ１０は、大略、パイプ本体１２とスリット１４とで構成される。 An embodiment of the present invention will be described below with reference to FIG.
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, and 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.
As shown in these drawings, the slit pipe 10 of the present invention is generally composed of a pipe body 12 and a slit 14.
　パイプ本体１２は、生体毒性（＝例えば、特定のイオンの溶出などによって引き起こされる生体に対する毒性）が抑えられた金属材料からなる中空筒状の部材である（なお、図１Ａでは、長手方向の途中部分を省略している）。
　ここで、生体毒性が抑えられた金属材料として、ＳＵＳ３０４などのステンレス鋼やＮｉ-Ｔｉ合金などを例示することができるが、生体毒性が抑えられている金属材料であれば如何なるものを使用してもよく、これらの例に限定されるものではない。また、必要に応じて、パイプ本体１２の外表面に、ヒアルロン酸塩やセルロース系高分子物質などの親水性材料を用いた親水コーティング処理等を施すようにしても良い。
　そして、このパイプ本体１２の表面には、その外表面から内表面に亘って貫通する連続した１本のスリット１４が、レーザー加工又はエッチングなどによって形成されている。 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).
Here, examples of the 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. Moreover, you may make it perform the hydrophilic coating process etc. which used hydrophilic materials, such as a hyaluronic acid salt and a cellulosic polymer substance, on the outer surface of the pipe main body 12 as needed.
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.
　スリット１４は、パイプ本体１２の長手方向両端部を除く全領域に亘って該パイプ本体１２の軸方向に沿って螺旋状に形成される。そして、図示実施形態のスリットパイプ１０では、同形同大の噛合ユニットＵがスリット１４全体に亘って連続して繰り返し設けられている。 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. In the slit pipe 10 of the illustrated embodiment, the same shape and the same meshing unit U are continuously and repeatedly provided over the entire slit 14.
　噛合ユニットＵは、スリット１４を介して対面するパイル本体１２同士が楔形状によって噛合する構成単位のことで、第１ベース部ｕ１，第１斜行部ｕ２，第２ベース部ｕ３及び第２斜行部ｕ４で大略構成されている。 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.
　第１ベース部ｕ１は、噛合ユニットＵにおいて、スリット１４の螺旋形状の旋回方向を規定する部分である。この第1ベース部ｕ１の先端側(一端側)には、スリット１４の走行方向が折り返されて、上記第１ベース部ｕ１との間で楔形を形成する第１斜行部ｕ２が設けられる。
　ここで、第１ベース部ｕ１と第１斜行部ｕ２との間に形成される「楔形」について、図１Ｂを参照しつつ説明すると、パイプ本体１２に設けられたスリット１４の螺旋形状を平面に展開した際に、第１ベース部ｕ１を含む線分Ｌ１と第１斜行部ｕ２を含む線分Ｌ２とが角度θ１の鋭角にて交差している状態を言う。 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.
Here, 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 θ1.
　上記第1斜行部ｕ２の先端側(一端側)には、上記螺旋形状の旋回方向を規定するようにスリット１４の走行方向が再び折り返されて、上記第１斜行部ｕ２との間で楔形を形成する第２ベース部ｕ３が設けられる。
　ここで、第１斜行部ｕ２と第２ベース部ｕ３との間に形成される「楔形」について、図１Ｂを参照しつつ説明すると、パイプ本体１２に設けられたスリット１４の螺旋形状を平面に展開した際に、第１斜行部ｕ２を含む線分Ｌ２と第２ベース部ｕ３を含む線分Ｌ３とが角度θ２の鋭角にて交差している状態を言う。なお、第２ベース部ｕ３と上述した第１ベース部ｕ１とは、ともにスリット１４螺旋形状の旋回方向を規定するものであるため、それらを含む線分Ｌ１及びＬ３は互いに平行であり、その結果、これらの部分と第１斜行部ｕ２との間に形成される楔形が成す角度θ１と角度θ２とは等しい角度となる。 On the tip side (one end side) of the first skew portion u2, 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.
Here, 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 θ2. 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 θ1 and the angle θ2 formed by the wedge shape formed between these portions and the first oblique portion u2 are equal to each other.
　上記第２ベース部ｕ３の先端側(一端側)には、スリット１４の走行方向が三度折り返されて、上記第２ベース部ｕ３との間で楔形を形成する第２斜行部ｕ４が設けられる。
　ここで、第２ベース部ｕ３と第２斜行部ｕ４との間に形成される「楔形」について、図１Ｂを参照しつつ説明すると、パイプ本体１２に設けられたスリット１４の螺旋形状を平面に展開した際に、第２ベース部ｕ３を含む線分Ｌ３と第２斜行部ｕ４を含む線分Ｌ４とが角度θ３の鋭角にて交差している状態を言う。なお、第２ベース部ｕ３と隣接する次の噛合ユニットＵの第１ベース部ｕ１とは、ともにスリット１４螺旋形状の旋回方向を規定するものであるため、それらを含む線分Ｌ３及びＬ１は互いに平行であり、その結果、これらの部分と第２斜行部ｕ４との間に形成される楔形が成す角度θ３と角度θ４とは等しい角度となる。 On the distal end side (one end side) of the second base portion u3, there is provided 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.
Here, 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 θ3. Since 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 θ3 and the angle θ4 formed by the wedge shape formed between these portions and the second oblique portion u4 are equal to each other.
　以上のように構成された噛合ユニットＵの形状は、図２乃至図６で示すように、種々の変更が可能である。
　以下、図１で示す実施形態と図２乃至図６で示す実施形態との間で異なる部分について説明すると、図２で示すものでは、第１ベース部ｕ１と第１斜行部ｕ２とが第２斜行部ｕ４と平行な線分で連結されると共に、第２ベース部ｕ３と第２斜行部ｕ４とが第１斜行部ｕ２と平行な線分で連結されている。図３で示すものでは、第１斜行部ｕ２と第２ベース部ｕ３とが第２斜行部ｕ４と平行な線分で連結されると共に、第２ベース部ｕ３と第２斜行部ｕ４とが第１斜行部ｕ２と鋭角で交わる線分で連結されている。図４で示すものでは、第１ベース部ｕ１と第１斜行部ｕ２とが第２斜行部ｕ４と平行な線分で連結され、第１斜行部ｕ２と第２ベース部ｕ３とが同じく第２斜行部ｕ４と平行な線分で連結されると共に、第２ベース部ｕ３と第２斜行部ｕ４とが第１斜行部ｕ２と平行な線分で連結されている。図５で示すものでは、第１ベース部ｕ１及び第２ベース部ｕ３が共にＶ字状に構成されている。そして、図６で示すものでは、第１ベース部ｕ１及び第２ベース部ｕ３の長手方向両端部が共に鈍角にて折り曲げられると共に、第１斜行部ｕ２及び第２斜行部ｕ４が略Ｓ字状に構成されている。 The shape of the meshing unit U configured as described above can be variously changed as shown in FIGS.
Hereinafter, a different part between the embodiment shown in FIG. 1 and the embodiment shown in FIGS. 2 to 6 will be described. In 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. In FIG. 3, 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. In FIG. 4, 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. Similarly, 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. In the case shown in FIG. 5, the first base portion u1 and the second base portion u3 are both configured in a V shape. 6, both longitudinal ends of the first base portion u1 and the second base portion u3 are both bent at an obtuse angle, and the first oblique portion u2 and the second oblique portion u4 are substantially S. It is configured in a letter shape.
　また、この噛合ユニットＵの大きさや数は、スリットパイプ１０に要求される品質に応じて適宜設定される。具体的には、スリットパイプ１０の柔軟性をより一層向上させたい場合には、噛合ユニットＵの大きさを小さくすると共に、スリット上に形成する該噛合ユニットＵの数を増やせばよい。逆に、スリットパイプ１０の剛性を向上させたい場合には、噛合ユニットＵの大きさを大きくすると共に、スリット上に形成する該噛合ユニットＵの数を減らせばよい。 Further, 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.
　以上のように構成されたスリットパイプ１０によれば、スリット１４が連続する１本のものであって、その途中に桁などが存在しないことから、スリットパイプ１０に繰り返し回転トルクが与えられた場合であっても、かかるトルクによる応力は、スリット１４全体で受け止められ、特定の部分に集中しない。
　また、このスリット１４に上述のような噛合ユニットＵを設けることによって、パイプ本体１２の軸回り両方向におけるトルク伝達性を向上させることができるのに加え、パイプ本体１２半径方向に対する高い柔軟性を付与することができ、その一方で、パイプ本体１２軸方向の伸縮を極小化させることができる。 According to 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.
　さらには、このようなスリットパイプ１０を、医療用シャフト部材の外装部品として従来より使用されているコイルスプリングに替えて、或いはコイルスプリングと共に適用した場合、スリットパイプ１０は軸方向の伸縮が極小化されているので、軸方向の高い伸縮性に起因する回転トルク伝達性の低下と言ったようなコイルスプリング固有の問題を解決でき、柔軟性及びトルク伝達性に優れた耐久性の高い医療用シャフト部材を提供することができる。 Furthermore, 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.
　なお、上述した実施形態では、噛合ユニットＵとして同形同大のものがスリット１４全体に亘って連続して繰り返し形成された場合が示されている。こうすることにより、パイプ本体１２の長手方向全体に対して、パイプ本体１２軸方向の伸びを極小化しつつ均一で高い柔軟性を付与することができるが、目的とするスリットパイプ１０の品質などに応じて、スリット１４に形成される噛合ユニットＵの形状や大きさをそれぞれ変化させるようにしてもよいし、スリット１４に形成する噛合ユニットＵを所定の規則に従って偏在させるようにしてもよい。 In the above-described embodiment, 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. In this way, 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. Accordingly, 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.
１０：スリットパイプ，１２：パイプ本体，１４：スリット，Ｕ：噛合ユニット，ｕ１：第１ベース部，ｕ２：第１斜行部，ｕ３：第２ベース部，ｕ４：第２斜行部． 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.

Claims (4)

  1. 　中空筒状のパイプ本体(１２)と、そのパイプ本体(１２)の外表面から内表面に亘って貫通し、該パイプ本体(１２)の軸方向に沿って螺旋状に設けられた連続する１本のスリット(１４)とで構成されたスリットパイプであって、
    　上記スリット(１４)には、螺旋形状の旋回方向を規定する第１ベース部(ｕ１)と、その第１ベース部(ｕ１)の先端側にて折り返され、上記第１ベース部(ｕ１)との間で楔形を形成する第１斜行部(ｕ２)と、その第１斜行部(ｕ２)の先端側にて上記螺旋形状の旋回方向を規定するように折り返され、上記第１斜行部(ｕ２)との間で楔形を形成する第２ベース部(ｕ３)と、その第２ベース部(ｕ３)の先端側にて折り返され、上記第２ベース部(ｕ３)との間で楔形を形成する第２斜行部(ｕ４)とからなる噛合ユニット(Ｕ)が、繰り返し設けられている、
    　ことを特徴とするスリットパイプ。     A hollow cylindrical pipe body (12), and a continuous 1 that penetrates from the outer surface to the inner surface of the pipe body (12) and is provided in a spiral shape along the axial direction of the pipe body (12). A slit pipe composed of a slit (14),
    The slit (14) is folded at the first base part (u1) that defines the spiral turning direction, and at the tip side of the first base part (u1), and the first base part (u1) The first skewed portion (u2) forming a wedge shape between the first skewed portion (u2) and the first skewed portion (u2) is folded back to define the turning direction of the spiral shape. A second base portion (u3) that forms a wedge shape with the portion (u2), and a wedge shape between the second base portion (u3) and the second base portion (u3). The meshing unit (U) composed of the second oblique part (u4) forming
    A slit pipe characterized by that.
  2. 　請求項１のスリットパイプにおいて、
    　前記スリット(１４)が、前記パイプ本体(１２)の長手方向両端部以外の領域に形成されている、ことを特徴とするスリットパイプ。     The slit pipe of claim 1,
    The slit pipe, wherein the slit (14) is formed in a region other than both longitudinal ends of the pipe body (12).
  3. 　請求項１又は２のスリットパイプにおいて、
    　前記スリット(１４)上に同形同大の前記噛合ユニット(Ｕ)が隙間なく連続して設けられる、ことを特徴とするスリットパイプ。     The slit pipe according to claim 1 or 2,
    The slit pipe characterized in that the meshing unit (U) having the same shape and the same size is continuously provided on the slit (14) without a gap.
  4. 　請求項１乃至３の何れかに記載のスリットパイプを用いたことを特徴とする医療用シャフト部材。 A medical shaft member using the slit pipe according to any one of claims 1 to 3.
PCT/JP2015/003864 2015-07-31 2015-07-31 Slit pipe and medical-treatment shaft member in which same is used WO2017021993A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2015/003864 WO2017021993A1 (en) 2015-07-31 2015-07-31 Slit pipe and medical-treatment shaft member in which same is used

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2015/003864 WO2017021993A1 (en) 2015-07-31 2015-07-31 Slit pipe and medical-treatment shaft member in which same is used

Publications (1)

Publication Number Publication Date
WO2017021993A1 true WO2017021993A1 (en) 2017-02-09

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Family Applications (1)

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WO (1) WO2017021993A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005501648A (en) * 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 Flexible inner tubular member and rotating tissue cutting instrument having flexible inner tubular member
JP2013176465A (en) * 2012-02-28 2013-09-09 Terumo Corp Flexible tube for medical instrument and medical instrument
JP2014513585A (en) * 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 Prosthetic heart valve delivery device
JP2014519376A (en) * 2011-05-13 2014-08-14 スピレーション インコーポレイテッド Deployment catheter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005501648A (en) * 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 Flexible inner tubular member and rotating tissue cutting instrument having flexible inner tubular member
JP2014513585A (en) * 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 Prosthetic heart valve delivery device
JP2014519376A (en) * 2011-05-13 2014-08-14 スピレーション インコーポレイテッド Deployment catheter
JP2013176465A (en) * 2012-02-28 2013-09-09 Terumo Corp Flexible tube for medical instrument and medical instrument

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