JP2012016416A - Catheter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a catheter allowing operation wire small-diameter tubes to be surely arranged in desired positions on the outside of a large-diameter resin tube and facilitating the bending operation of a sheath performed by sliding operation wires.SOLUTION: A holding resin member 51 of elongated shape is wound in coil shape around the large-diameter resin tube 20 and the operation wire small-diameter tubes 30(a, b), and the holding resin member 51 is fused to the operation wire small-diameter tubes 30(a, b) and the large-diameter resin tube 20. The operation wire small-diameter tubes 30(a, b) can thereby be surely arranged in the desired positions on the outside of the large-diameter resin tube 20 by the holding resin member 51 of elongated shape wound in coil shape and fused. Furthermore, since the holding resin member 51 wound in coil shape is not so firm as a mesh-like blade, the sheath can be easily bent by the sliding operation wires 40(a, b).

Description

  The present invention relates to a catheter capable of variably operating the direction of entry into a body cavity by bending a distal end portion of a sheath by pulling a slide operation line inserted through the sheath.

  In recent years, there has been provided a catheter that can be operated in a variable manner in the direction of entry into a body cavity by bending a distal end portion of the sheath by pulling a slide operation line inserted through the sheath.

  With regard to this type of technology, a small-diameter operation wire tubule is arranged on the outer periphery of a large-diameter large-diameter resin tube, and a slide operation line is slidably inserted into the operation wire tubule so that the tip is distal to the large-diameter resin tube There has been proposed a catheter that is connected to an end portion and encloses a large-diameter resin tube with a mesh-like blade together with an operation wire tubule (Patent Document 1).

Special table 2009-537244 gazette JP 2001-087389 A

  In the catheter of Patent Document 1, a large-diameter resin tube is surrounded by a mesh-like blade, and an operation wire tubule is disposed inside the blade. For this reason, the operation wire tubule is held by the blade on the outer peripheral surface of the large-diameter resin tube.

  However, the operation wire tubule is not reliably held by the mesh blade, and the operation wire tubule may be displaced on the outer peripheral surface of the large diameter resin tube. Such displacement is particularly likely to occur during the manufacturing process of the catheter, and hinders the bending performance of the completed catheter.

  The present invention has been made in view of the problems as described above, and the operation wire tubule can be reliably disposed at a desired position outside the large-diameter resin tube, and a product having the same characteristics can be stably produced. The present invention provides a catheter that can be used, and a method for manufacturing the same.

  The catheter of the present invention includes a large-diameter resin tube in which a large-diameter lumen is formed, at least one small-diameter operation wire tubule located outside at least at the distal end of the large-diameter resin tube, and an operation wire tubule A slide operation line that is slidably inserted and a tip end portion of which is connected to at least the distal end portion of the large-diameter resin tube, and a holding resin member that is wound integrally with the large-diameter resin tube and the operation line thin tube And the holding resin member is fused to the operation line thin tube and the large diameter resin tube.

  Therefore, in the catheter of the present invention, at least one small-diameter operation wire tubule is located outside at least the distal end portion of the large-diameter resin tube in which the large-diameter lumen is formed. The tip of the slide operation line that is slidably inserted into the operation line thin tube is connected to at least the distal end of the large-diameter resin tube. A holding resin member is wound around the large-diameter resin tube and the operation wire thin tube, and the holding resin member is fused to the operation wire thin tube and the large-diameter resin tube. For this reason, the operation wire tubule is reliably disposed at a desired position outside the large-diameter resin tube by the fused and elongated holding resin member.

  Further, in the catheter as described above, the melting point of the holding resin member is lower than the melting points of the large-diameter resin tube and the operation wire tubule.

  In the catheter as described above, the elongated holding resin member is wound around the large-diameter resin tube and the operation wire thin tube in a coil shape, and the coil-shaped holding resin member is the operation wire thin tube and the large-diameter resin tube. And may be fused.

  The catheter as described above may further include a wire having a melting point higher than that of the holding resin member, and the wire may be wound in a coil shape together with the holding resin member between the large-diameter resin tube and the operation wire tubule.

  In the catheter as described above, a plurality of wires may be wound around the large-diameter resin tube and the operation wire tubule with respect to one holding resin member.

  In the catheter as described above, an outer resin layer may be formed on the outside of the holding resin member and the wire.

  In the catheter as described above, the holding resin member and the resin outer layer may be formed of the same material.

  In the catheter as described above, the holding resin member and the wire are wound at intervals at least at the distal end portion of the large-diameter resin tube and tightly wound at least at the proximal end portion. It may be turned.

  In the catheter as described above, at least a part of the distal end side of the operation wire tubule is made of a thin tube coil and at least a part of the proximal end side is made of a hard resin tube, and the holding resin member and the wire are made of the operation wire tubule. It may be wound around at least a part of the position made of the thin tube coil and tightly wound at at least a part of the position made of the hard resin pipe.

  Further, in the catheter as described above, the holding resin member is formed in a mesh shape and wound around the large-diameter resin tube and the operation wire tubule, and the mesh-shaped holding resin member is the operation wire tubule and the large-diameter resin tube. And may be fused.

  Further, in the above-described catheter, a concave groove is formed on the outer peripheral surface in at least a part of the longitudinal direction of the large diameter resin tube, and at least a part of the operation wire tubule is disposed in the concave groove of the large diameter resin tube. It may be.

  Further, in the above-described catheter, a spacer member may be arranged at a position where the operation wire tubule is not located on the outer peripheral surface of the large diameter resin tube.

  The manufacturing method of the present invention is a manufacturing method of the catheter of the present invention, wherein a core wire support member having at least one through-hole through which a large-diameter resin tube and an operation wire thin tube are inserted is prepared. The inserted large-diameter resin tube is inserted into the through-hole of the core wire support member together with the operation wire thin tube, and the holding resin member is wound with the large-diameter resin tube inserted into the through-hole of the core wire support member and the operation wire thin tube as one body. Turn to melt at least a portion of the holding resin member and fuse it to the operating wire capillary and the large diameter resin tube.

  The various components of the present invention do not necessarily have to be independent of each other. A plurality of components are formed as a single member, and a single component is formed of a plurality of members. It may be that a certain component is a part of another component, a part of a certain component overlaps with a part of another component, or the like.

  Moreover, although the manufacturing method of this invention has described several manufacturing process in order, the order of the description does not limit the order which performs several manufacturing process. For this reason, when implementing the manufacturing method of this invention, the order of the some manufacturing process can be changed in the range which does not interfere in content.

  Furthermore, the manufacturing method of the present invention is not limited to being executed at a timing when a plurality of manufacturing steps are individually different. For this reason, another manufacturing process may occur during the execution of a certain manufacturing process, or a part or all of the execution timing of a certain manufacturing process and the execution timing of another manufacturing process may overlap.

  In the catheter of the present invention, an elongated holding resin member is wound around the large diameter resin tube and the operation wire tubule in a coil shape, and the holding resin member is fused to the operation wire tubule and the large diameter resin tube. Yes. For this reason, the operation wire tubule can be reliably arranged at a desired position outside the large-diameter resin tube by the elongated holding resin member wound in a coil shape and fused.

It is a vertical side view of the distal end portion of the sheath of the catheter according to the embodiment of the present invention. It is II-II sectional drawing of FIG. It is the vertical side view which expanded the area | region III shown in FIG. It is a side view which shows the whole catheter. It is a vertical side view which shows the part of a rotation operation member. It is sectional drawing which shows the part of a rotation operation member and a position adjustment mechanism, (a) is a side view, (b) is a top view. It is a side view which shows operation | movement of a position adjustment mechanism. It is a side view explaining the catheter of the state which pulled-operated the slide operation line. The manufacturing method of the principal part of a catheter is shown, (a) is a front view of a core wire support member, (b) is a vertical side view. It is a typical perspective view which shows the manufacturing method of the principal part of a catheter. It is a vertical side view which shows the distal end part of the sheath of the catheter of one modification. It is a vertical front view which shows the sheath of the catheter of another modification. It is a vertical front view which shows the sheath of the catheter of another modification. It is a vertical side view which shows the distal end part of the sheath of a catheter. The manufacturing method of the principal part of a catheter is shown, (a) is a vertical side view, (b) is a front view. It is a typical perspective view which shows the manufacturing method of the principal part of a catheter. It is a vertical front view which shows the sheath of the catheter of another modification. It is a vertical front view which shows the sheath of the catheter of another modification. It is a vertical side view which shows the sheath of the catheter of another modification. It is a vertical side view which shows the distal end part of the sheath of the catheter of another modification.

  An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an enlarged longitudinal side view of a region I of the catheter 10 of the present embodiment shown by a broken line in FIG. 4, and FIG. 2 is a sectional view taken along the line II-II in FIG. FIG. 3 is an enlarged vertical side view of a region III indicated by a broken line in FIG.

  FIG. 4 is a side view showing the entire catheter 10 of the present embodiment, and FIG. 5 is a longitudinal side view showing a part of the rotation operation member 70. FIG. 6 is a longitudinal side view and a longitudinal plan view showing portions of the rotation operation member 70 and the position adjusting mechanism 80.

  FIG. 7 is a side view illustrating the operation of the position adjusting mechanism, and FIG. 8 is a side view illustrating the catheter in a state where the slide operation line is pulled. In the present embodiment, description will be made by defining the front-rear, left-right, up-down directions as shown.

  However, this is provided for the sake of convenience in order to briefly explain the relative relationship between the components. Therefore, the direction at the time of manufacture and use of the product which implements the present invention is not limited.

  In the catheter 10 of the present embodiment, as shown in FIGS. 1 to 3, the catheter 10 includes a large-diameter resin tube 20 in which a large-diameter lumen is formed, and at least a distal end portion of the large-diameter resin tube 20. And at least one small-diameter operation line capillary 30 (a, b) and the operation line capillary 30 (a, b) slidably inserted into the distal end of at least the large-diameter resin tube 20. Slender operation resin 40 (a, b) connected to the end, large-diameter resin tube 20 and operation wire thin tube 30 (a, b) are integrally wound in a coil shape. And a member 51.

  The holding resin member 51 is fused to the operation line thin tube 30 (a, b) and the large diameter resin tube 20. Note that the melting point of the holding resin member 51 is lower than the melting points of the large-diameter resin tube 20 and the operation wire capillary 30.

  In the catheter 10 of the present embodiment, as described above, the elongated holding resin member 51 wound in a coil shape around the large-diameter resin tube 20 and the operation wire tubule 30 (a, b) is the operation wire tubule 30. A semi-molten resin layer 50 is formed by being fused to (a, b) and the large-diameter resin tube 20.

  The semi-molten resin layer 50 is a state in which a holding resin member 51 having a circular cross-sectional shape is wound around the operation wire thin tube 30 (a, b) and the large-diameter resin tube 20 and at least an outer peripheral portion thereof. It is melted and fused to the operation wire tubule 30 (a, b) and the large diameter resin tube 20 and solidified.

  In the catheter 10 of the present embodiment, a separate operation line tube 30 (a, b) made of polyetheretherketone (PEEK) or the like is disposed outside the large diameter resin tube 20 made of a fluorine coat layer or the like. The holding resin member 51 of the semi-molten resin layer 50 is wound around the operation line thin tube 30 (a, b) and the large diameter resin tube 20.

  As shown in FIG. 1, the semi-molten resin layer 50 has a holding resin member 51 wound around the sheath 16 at intervals in order to facilitate bending at the distal end portion of the sheath 16. The holding resin member 51 is tightly wound in order to restrict the bending at the end portion or the like.

  More specifically, in the catheter 10 of the present embodiment, in addition to the large-diameter resin tube 20, the operation wire thin tube 30 (a, b), the slide operation wire 40 (a, b), and the semi-molten resin layer 50 described above. The sheath 16 is formed of at least the outer layer 60 and the coat layer 64.

  The sheath 16 is a flexible tubular body that is inserted into a body cavity through an endoscope or directly, and is inserted into a blood vessel such as a celiac artery and a peripheral blood vessel such as a hepatic artery branch or an internal carotid artery branch. The

  As shown in FIGS. 1 to 3, the outer layer 60 is formed of a resin layer that covers the semi-molten resin layer 50. The coat layer 64 is made of a hydrophilic resin layer whose outer surface is lubricated as the outermost layer of the catheter 10.

  For the coat layer 64, a hydrophilic material such as polyvinyl alcohol (PVA) or polyvinyl pyrrolidone can be used. As shown in FIGS. 1 and 3, the coat layer 64 is formed at the distal end portion of the sheath 16, but is omitted at the proximal end portion.

  Here, typical dimensions of the sheath 16 of the present embodiment will be exemplified. The outermost diameter of the sheath 16 is less than 1 mm in diameter, specifically about 700 to 900 μm. The inner diameter of the large-diameter resin tube 20 is about 400 to 600 μm, the thickness of the outer layer 60 is about 100 to 150 μm, and the thickness of the semi-molten resin layer 50 is 20 to 100 μm. Further, the inner diameter of the operation wire capillary 30 (a, b) is 40 to 100 μm, and the thickness of the slide operation wire 40 (a, b) is 30 to 60 μm.

  A thermoplastic polymer is widely used for the outer layer 60. Examples include polyimide (PI), polyamideimide (PAI), polyethylene terephthalate (PET), polyethylene (PE), polyamide (PA), nylon elastomer, polyurethane (PU), ethylene-vinyl acetate resin (EVA), poly Vinyl chloride (PVC) or polypropylene (PP) can be used.

  For the holding resin member 51 constituting the semi-molten resin layer 50, a thermoplastic polymer is widely used as in the case of the outer layer 60 described above. As an example, in addition to polyimide, polyamideimide, and polyethylene terephthalate, polyethylene, polyamide, nylon elastomer, polyurethane, ethylene-vinyl acetate resin, polyvinyl chloride, polypropylene, or the like can be used. The cross-sectional shape of the holding resin member 51 is not particularly limited, and may be a circle, an ellipse, a square, a rectangle, a polygon, or the like, but is a general circle in the present embodiment.

  The operation wire thin tubes 30 a and 30 b are held by the semi-molten resin layer 50 along the outer peripheral surface of the large diameter resin tube 20. That is, inside the outer layer 60 and the semi-molten resin layer 50, operation line thin tubes 30a, 30b are embedded extending in the longitudinal direction, and the slide operation lines 40 (a, b) are slidably inserted into each. Has been.

  Further, a part or the whole of the operation wire tubule 30 (a, b) may be provided spirally with respect to the sheath 16, and may include a circumferential component together with a longitudinal component. Hereinafter, the slide operation line 40a may be referred to as a first slide operation line, and the slide operation line 40b may be referred to as a second slide operation line.

  In the catheter 10 of the present embodiment, the pair of operation line thin tubes 30a and 30b through which the slide operation lines 40a and 40b are inserted are arranged to face the periphery of the large-diameter resin tube 20.

  In other words, in the present embodiment, the operation line tubule 30a and the operation line tubule 30b are formed to be opposed to each other by 180 degrees across the axis of the catheter 10. The slide operation line 40a is inserted through the operation line capillary 30a, and the slide operation line 40b is inserted through the operation line capillary 30b.

  By providing the operation wire thin tubes 30a and 30b inside the semi-molten resin layer 50, the outer layer 60 outside the semi-molten resin layer 50, that is, the body of the subject is protected against the slide operation lines 40a and 40b that slide. The

  As will be described in detail later, the operation wire tubules 30 (a, b) can be integrally formed on the outer peripheral surface of the large diameter resin tube 20 by being extruded together with the resin material constituting the large diameter resin tube 20. The material of the operation wire capillary 30 (a, b) is superior in heat resistance to the resin material of the outer layer 60, and from the viewpoint of slidability with the slide operation wire 40 (a, b), for example, polyether ether ketone. Fluorine polymer materials such as polysulfone (PSF), polytetrafluoroethylene (PTFE), and polyvinylidene fluoride (PVDF) can be preferably used.

  There are various methods for inserting the slide operation line 40 (a, b) into the operation line capillary 30 (a, b). The slide operation lines 40 (a, b) may be inserted from one end side of the sheath 16 in which the operation line thin tubes 30 (a, b) are embedded in advance. Alternatively, the sheath 16 may be formed by extruding the operation line thin tubes 30 (a, b) into which the slide operation lines 40 (a, b) are inserted in advance together with the resin material of the large diameter resin tube 20.

  Specific materials for the slide operation line 40 (a, b) include, for example, polyether ether ketone, polyphenylene sulfide (PPS), polybutylene terephthalate (PBT), polymer fiber such as PI or PTFE, SUS, Corrosion-resistant coated steel wires, metal wires such as titanium or titanium alloys can be used.

  In addition, heat resistance is calculated | required for the slide operation line 40 (a, b), such as when inserting the slide operation line 40 (a, b) with respect to the sheath 16 by which the operation line thin tube 30 (a, b) was previously embedded. If not, polyvinylidene fluoride, high-density polyethylene (HDPE), or polyester may be used in addition to the above materials.

  As shown in FIG. 1, the distal end portion 15 of the sheath 16 is provided with a ring-shaped marker 66 made of a material that does not transmit radiation such as X-rays. Specifically, a metal material such as platinum can be used for the marker 66. The marker 66 of the present embodiment is provided outside the large diameter resin tube 20 and inside the coat layer 64.

  A distal end portion (distal end portion) 41 of the slide operation line 40 (a, b) is fixed to the distal end portion 15 of the catheter 10. A mode in which the tip end portion 41 of the slide operation line 40 (a, b) is fixed to the distal end portion 15 is not particularly limited.

  For example, as shown in FIG. 5, the tip portion 41 of the slide operation line 40 (a, b) may be fastened to the marker 66, welded to the distal end portion 15 of the sheath 16, or an adhesive. May be adhered and fixed to the marker 66 or the distal end 15 of the sheath 16. In the present embodiment, the tip portion 41 of the slide operation line 40 (a, b) is embedded in the resin of the outer layer 60.

  The distal end portion 15 of the sheath 16 refers to a predetermined region on the distal end side that is inserted into the body of the subject of the sheath 16. The proximal end portion 17 of the sheath 16 refers to a predetermined region on the terminal side operated by the operator, and includes a region inserted into the inside of the rotation operation member 70.

  Similarly, the distal end portion 41 of the slide operation line 40 (a, b) refers to a predetermined area including the distal end of the slide operation line 40 (a, b), and the proximal end portion of the slide operation line 40 (a, b). 43 denotes a predetermined area including the base end of the slide operation line 40 (a, b).

  As shown in FIG. 5, the catheter 10 of the present embodiment is pivotally supported in the vicinity of the proximal end of the sheath 16 so as to be rotatable in an axial direction perpendicular to the longitudinal direction, and a pair of operation line tubules 30 ( a pair of slide operation lines 40 (a, b) drawn out from a, b) and at least one rotation operation member 70 wound around the outer peripheral surface from both sides, and the slide operation lines 40 (a, b) It further has a groove-like operation line fixing portion 79 that is fixed to the rotation operation member 70 at a position away from the operation line thin tube 30 (a, b) from which the proximal end portion 43 is drawn.

  In the catheter 10 of the present embodiment, as described above, the elongated holding resin member 51 is wound around the large-diameter resin tube 20 and the operation wire tubule 30 (a, b) in a coil shape. 51 is fused to the operation wire thin tube 30 (a, b) and the large diameter resin tube 20.

  For this reason, the operation wire tubules 30 (a, b) can be reliably arranged at desired positions outside the large-diameter resin tube 20 by the elongated holding resin member 51 wound in a coil shape and fused. it can.

  Further, as described above, the holding resin member 51 is wound around the outer periphery of the large-diameter resin tube 20 instead of a strong blade, so that the semi-molten resin layer 50 is formed. Can be easily inserted.

  In addition, since the slide operation line 40 (a, b) is positioned inside the semi-melted resin layer 50, the slide operation line 40 (a, b) is largely slid and moved due to free bending of the sheath. It will not be done.

  The slide operation line 40 (a, b) is located outside the large-diameter resin tube 20, but the slide operation line 40 (a, b) is located on the outside because the semi-molten resin layer 50 is not a blade. Thus, the sheath can be easily bent.

  Furthermore, in the catheter 10 of the present embodiment, separate operation line thin tubes 30 (a, b) are arranged outside the large diameter resin tube 20. For this reason, the large-diameter resin tube 20 and the operation wire tubule 30 (a, b) can be formed of materials suitable for each, and the operation wire tubule 30 (a, b) is formed on the outer peripheral surface of the large-diameter resin tube 20. ) Is also easy to arrange.

  Patent Document 2 described above discloses that a resin wire is wound in a coil shape on the outside of a sheath of a catheter and fused. However, it is not disclosed that the operation wire tubule is fixed to the outside of the large diameter resin tube with the resin wire.

  On the other hand, in the catheter 10 of the present embodiment, the holding resin member 51 is obtained by winding the separate operation wire thin tubes 30 (a, b) arranged outside the large-diameter resin tube 20 as described above. It is fixed by fusing.

  As shown in FIG. 4 and the like, the rotation operation member 70 is rotated at least by manual operation to slide the pair of slide operation lines 40 (a, b), and the slide operation lines 40 (a, b) By sliding at least the operation wire tubules 30 (a, b), tension is generated to bend the distal end portion 15 of the sheath 16.

  As shown in FIG. 6 and the like, the rotation operation member 70 is a cylindrical drum portion 742 around which the slide operation line 40 (a, b) is actually wound, and the drum portion 742 is rotated to the operation main body member 72. A shaft portion 741 that is freely supported, a dial portion 74 that is manually operated in a disk shape larger in diameter than the drum portion 742, and the like are integrally formed.

  The dial portion 74 protrudes from the operation main body member 72 in the width direction (vertical direction in FIG. 6A). The operator can rotate the drum portion 742 around the shaft portion 741 in the forward and reverse directions by rotating the peripheral surface of the dial portion 74 with a finger pad (not shown) or the like.

  An operation line fixing portion 79 (a, b) is cut in the drum portion 742 so as to cut inward in the radial direction from the periphery. The operation line fixing portions 79 a and 79 b are formed at two places on the drum portion 742.

  Inside the operation main body member 72, guide rollers 77 (a to d) for guiding the two operation line narrow tubes 30 (a, b) branched from the sheath 16 toward the dial portion 74 of the rotation operation member 70, respectively. Is provided.

  The guide rollers 77a and 77b are rotation mechanisms that offset the operation wire tubules 30 (a, b) from the sheath 16 in the axial direction of the dial portion 74 (upward in FIG. 8B). The guide rollers 77a and 77b are rotatably attached to the operation main body member 72, and are parallel to each other. The rotation axes of the guide rollers 77a and 77b extend in a direction orthogonal to the longitudinal direction of the sheath 16 and the axial direction of the dial portion 74.

  The guide rollers 77c and 77d are provided in opposition to the radial direction of the dial portion 74 with the sheath 16 interposed therebetween, and are rotating mechanisms that guide the two operation wire tubes 30 (a, b) in the tangential direction of the drum portion 742. is there.

  The guide rollers 77c and 77d are rotatably attached to the operation main body member 72, and are parallel to each other. The rotation axes of the guide rollers 77 c and 77 d are orthogonal to the longitudinal direction of the sheath 16 and are parallel to the axial direction of the dial portion 74.

  FIG. 8 is a side view illustrating the catheter 10 in a state where the first slide operation line 40a and the second slide operation line 40b (both refer to FIG. 1) are pulled. FIG. 4A shows a first state in which the dial portion 74 is rotated clockwise in the drawing and the first slide operation line 40a is pulled.

  FIG. 5B shows a second state in which the dial portion 74 is rotated counterclockwise in the drawing and the second slide operation line 40b is pulled. Hereinafter, with respect to the rotation direction of the dial portion 74, the clockwise rotation direction in the figure may be referred to as a forward direction, and the counterclockwise rotation direction may be referred to as a reverse direction.

  The catheter 10 of the present embodiment also includes an operation main body member 72 that accommodates the proximal end portion 17 of the sheath 16 and to which the dial portion 74 of the rotation operation member 70 is fixed. The catheter 10 of the present embodiment is an index indicating that the dial portion 74 of the rotation operation member 70 is in the first state, the second state, or the neutral state between the first state and the second state. A part 75 is also provided.

  More specifically, the operation main body member 72 is provided with a mark 76 indicating the reference position (zero point position) of the dial portion 74. And the dial part 74 will be in a neutral state by making the index part 75 of the dial part 74 and the mark 76 of the operation main body member 72 correspond (refer FIG. 4).

  In the neutral state, both the first slide operation line 40a and the second slide operation line 40b are in a natural state, that is, a state in which they are not pulled, and the tension is zero. Then, when the dial portion 74 is rotated clockwise (in the positive direction) as shown in FIG. 8A with the neutral state as a reference, the first slide operation line 40a is pulled. Then, when the dial portion 74 is rotated counterclockwise (reverse direction) as shown in FIG. 5B with the neutral state as a reference, the second state is obtained in which the second slide operation line 40b is pulled.

  When the dial portion 74 of the rotation operation member 70 is in the first state, the first slide operation line 40a is pulled and tensioned, and the second slide operation line 40b is relaxed. When the dial portion 74 is in the second state, the first slide operation line 40a is relaxed and the second slide operation line 40b is pulled and tensioned.

  Here, the first slide operation line 40a is inserted upward in the figure inside the sheath 16 (see FIG. 1). Similarly, the second slide operation line 40b is inserted downward in the figure.

  FIG. 6 is a longitudinal side view and a longitudinal plan view showing portions of the rotation operation member 70 and the position adjusting mechanism 80. The figure (a) is a vertical side view, and the figure (b) is a cross-sectional plan view. FIG. 4B corresponds to the VI-VI sectional view shown in FIG. FIG. 3 is an enlarged vertical side view of region III shown in FIG.

  The proximal end portion 17 of the sheath 16 is housed in the operation main body member 72 of the dial portion 74 so as to penetrate in the longitudinal direction. The proximal end portion PE of the sheath 16 is located behind the operation main body member 72 and the position adjusting mechanism 80 (rightward in FIG. 6).

  A folding tube 78 is attached to the distal end portion of the operation main body member 72 in the longitudinal direction. The folding tube 78 is a hollow tubular member, and the proximal end portion 17 of the sheath 16 is inserted into the folding tube 78. A break tube 78 is applied to the proximal end 17 of the sheath 16.

  As shown in FIGS. 3 and 8, inside the distal end side of the operation main body member 72, the proximal end portion 32 of the operation wire capillary 30 (a, b) branches off from the sheath 16 together with the slide operation wire 40 (a, b). is doing. More specifically, a notch 62 is formed on the surface of the outer layer 60 in the proximal end portion 17 of the sheath 16 accommodated in the operation main body member 72.

  The operation wire tubules 30 (a, b) are exposed to the outside from the outer layer 60 through the notches, and are branched outward in the radial direction of the sheath 16. On the other hand, the sheath 16 is slidably inserted in the longitudinal direction with respect to the operation main body member 72, and extends to the rear of the operation main body member 72 as shown in FIG.

  In the catheter 10 of the present embodiment, not only the slide operation line 40 (first and second slide operation lines 40a and 40b) but also the operation line thin tubes 30 (a and b) are branched from the sheath 16 to guide rollers. The dial part 74 is guided by 77 (ad). As a result, the slide operation line 40 (a, b) having a small diameter is prevented from being directly contacted with the guide roller 77 (ad) and being worn and broken.

  The first slide operation line 40a and the second slide operation line 40b projecting from the base end portion 32 of the operation line thin tube 30 (a, b) are opposite to each other over about a half circumference around the drum portion 742. It is wound around.

  Specifically, as shown in FIG. 5 and the like, the first slide operation line 40a is wound clockwise around the upper half of the drum portion 742 from the distal end side toward the proximal end side. On the other hand, the second slide operation line 40b is wound counterclockwise from the distal end side toward the proximal end side with respect to the lower half of the drum portion 742.

  That is, the base end portions 43 of the first slide operation line 40 a and the second slide operation line 40 b are engaged with the dial portion 74 of the rotation operation member 70 at different positions.

  In the case of the present embodiment, the first slide operation line 40 a and the second slide operation line 40 b are engaged with the drum portion 742 of the dial portion 74 at symmetrical positions with the sheath 16 interposed therebetween.

  In addition, as long as the dial part 74 can provide traction with respect to the slide operation line 40 (a, b), the aspect of engagement with the slide operation line 40 (a, b) and the dial part 74 is not specifically limited. . In the present embodiment, the base end 44 of the slide operation line 40 (a, b) is fixed to the operation line fixing portion 79, and the base end portion 43 having a predetermined length is in contact with the periphery of the drum portion 742. .

  However, instead of the present embodiment, the base end 44 of the slide operation line 40 (a, b) is fixed to the operation main body member 72, and the slide operation line 40 (a, b) is rotated by a dial part (cam) that rotates eccentrically. A traction force may be applied to the proximal end portion 43.

  The base ends 44 of the first slide operation line 40a and the second slide operation line 40b are fixed to the operation line fixing parts 79a and 79b of the drum part 742, respectively. The dial part 74 prevents the first slide operation line 40a and the second slide operation line 40b wound around the drum part 742 from being detached. The dial portion 74 is provided with an indicator portion 75. In the case of the present embodiment, a pair of indicator portions 75 are provided at positions on the dial portion 74 that face each other by 180 degrees.

  In the natural state of the catheter 10 shown in FIG. 6A, the pair of indicator portions 75 are in symmetrical positions with the sheath 16 interposed therebetween. In the natural state of the catheter 10, the operation line fixing portions 79 a and 79 b are also in symmetrical positions with the sheath 16 interposed therebetween.

  When the dial portion 74 is rotated in the forward direction (clockwise) from this state, the circumferential length of the drum portion 742 from the guide roller 77c to the operation line fixing portion 79a increases, and the first slide operation line 40a is based on the basic slide operation line 40a. It will be pulled to the end side.

  Conversely, when the dial portion 74 is rotated in the reverse direction (counterclockwise) from the natural state of FIG. 6A, the circumferential length of the drum portion 742 from the guide roller 77d to the operation line fixing portion 79b increases. The second slide operation line 40b is pulled to the proximal end side. Accordingly, as described above with reference to FIGS. 8A and 8B, the bending direction of the distal end portion 15 of the sheath 16 is selected by the rotation operation of the dial portion 74 in the forward and reverse directions.

  In the present embodiment, since the translation direction of the dial portion 74 is fixed with respect to the operation main body member 72, the first slide operation line 40a or the second slide operation line is selected depending on the selection of the rotation direction of the dial portion 74. Only one of 40b is pulled.

  However, the present invention is not limited to this, and the first slide operation line 40a and the second slide operation line 40b may be pulled simultaneously. Specifically, the dial portion 74 may be attached to the operation main body member 72 so as to be rotatable and slidable in the longitudinal direction.

  That is, a long hole whose longitudinal direction is the major axis direction is provided in the operation main body member 72, and the dial portion 74 rotates with respect to the operation main body member 72 by attaching the shaft portion 741 of the dial portion 74 to the long hole. And it becomes possible to slide. Then, by sliding the dial portion 74, the first slide operation line 40a and the second slide operation line 40b can be pulled together.

  In the catheter 10 of the present embodiment, when the first slide operation line 40a or the second slide operation line 40b is pulled, tension is applied to the distal end portion 15 of the sheath 16, and the slide operation line The distal end portion 15 bends to the side through which 40 (a, b) is inserted.

  That is, in the catheter 10 of the present embodiment, when the dial portion 74 is rotated and the first slide operation line 40a is pulled toward the proximal end side (the right direction in FIG. 8), the distal end portion 15 of the sheath 16 is Bends upward in the figure.

  Further, when the dial portion 74 is rotated in the opposite direction and the second slide operation line 40b is pulled to the proximal end side, the distal end portion 15 of the sheath 16 bends downward in the figure. Here, the bending of the sheath 16 means that a part or all of the sheath 16 is bent or bent.

  Accordingly, the entire rotation operation member 70 is rotated about the axis in a state where the first slide operation line 40a or the second slide operation line 40b is pulled and the distal end portion 15 is bent toward the slide operation line. The distal end portion 15 can be oriented in a desired direction by rotating the torque by 90 degrees at the maximum in the right screw direction or the left screw direction.

  That is, according to the catheter 10 of the present embodiment, the distal end portion 15 can be bent in a desired direction while suppressing the torque rotation of the entire catheter 10 (the rotation operation member 70) to 90 degrees or less. For this reason, the operator can orient | assign the distal end part 15 of the catheter 10 to a desired direction rapidly.

  As shown in FIG. 7, the position adjustment mechanism 80 of the catheter 10 of the present embodiment moves the rotation operation member 70 and the sheath 16 relative to each other in the longitudinal direction of the sheath 16, thereby moving the slide operation lines 40 a and 40 b. The tension can be adjusted to increase or decrease.

  As shown in FIG. 6, the catheter 10 of the present embodiment also includes a connector 90 to which the proximal end portion PE of the sheath 16 is fixed and engages with the position adjusting mechanism 80. The connector 90 is a cylindrical member attached to the proximal end portion PE of the sheath 16, and an opening 92 is formed at the proximal end. The tip of the connector 90 is closed except for the proximal end portion PE of the sheath 16.

  A syringe (not shown) filled with a chemical solution or the like is attached to the opening 92. The chemical solution or the like supplied from the syringe to the sheath 16 is discharged from the distal end portion DE of the sheath 16 through the large-diameter resin tube 20 of the sheath 16 (see FIGS. 1 and 8).

  A proximal end portion PE of the sheath 16 is attached to the position adjusting mechanism 80. In the present embodiment, the proximal end portion PE of the sheath 16 is indirectly attached to the position adjustment mechanism 80 via the connector 90.

  Further, the position adjustment mechanism 80 is screwed in the longitudinal direction with respect to the operation main body member 72, and the position adjustment mechanism 80 is screwed with respect to the operation main body member 72, whereby the dial portion 74 and the slide operation line 40 a, 40b and the sheath 16 move relative to each other in the longitudinal direction.

  Specifically, the position adjusting mechanism 80 according to the present embodiment includes a male screw member 82 having a thread groove 86 threaded on the outer peripheral surface and a stopper portion 84 attached to the screw groove 86. The male screw member 82 includes a through hole 83 extending in the longitudinal direction.

  Both ends of the through hole 83 are open, and the distal end portion of the connector 90 and the proximal end portion PE of the sheath 16 are inserted therethrough. A tapered portion 91 that is reduced in diameter toward the distal end side is formed at the distal end portion of the connector 90.

  The tapered portion 91 of the connector 90 is fitted and fixed to the through hole 83 of the male screw member 82. On the other hand, a female thread portion 81 extending in the longitudinal direction is formed on the proximal end portion of the operation main body member 72. The male screw member 82 is screwed into the female screw portion 81. Then, when the position adjustment mechanism 80 is screwed with respect to the operation main body member 72, the connector 90 moves in the longitudinal direction.

  In the present embodiment, when the position adjustment mechanism 80 is screwed with respect to the operation main body member 72, the position adjustment mechanism 80 screwed into the operation main body member 72 moves to at least one of the base end side or the distal end side. That means.

  In the case of the present embodiment, the sheath 16 moves rearward together with the connector 90 fitted in the through hole 83 by screwing the male screw member 82 to the proximal end side with respect to the operation main body member 72.

  FIG. 7 is a side view showing the operation of the position adjusting mechanism. Compared with the position adjusting mechanism and the connector (shown by a broken line) in FIG. 6, the catheter 10 screws the position adjusting mechanism 80 and the connector 90 backward from the operation main body member 72 (to the right in the figure) as indicated by arrows. It is in a state of letting.

  Here, the dial portion 74 is restricted from moving back and forth in the longitudinal direction with respect to the operation main body member 72. Therefore, as shown in the figure, when the male screw member 82 of the position adjusting mechanism 80 is screwed backward with respect to the operation main body member 72, the proximal end portion PE (see FIG. 6) of the sheath 16 through the connector 90. Is pulled backwards. As a result, the dial portion 74 and the sheath 16 are relatively moved in the longitudinal direction.

  Then, as shown by the arrow in FIG. 5, the sheath 16 moves backward as a whole. Further, the operation wire tubules 30a and 30b branched from the sheath 16 and guided to the dial part 74 by the guide rollers 77a to 77d also approach the dial part 74 as a whole.

  On the other hand, the base ends 44 of the slide operation lines 40 a and 40 b are fixed to an operation line fixing portion 79 of the dial portion 74. Therefore, when the distal end portion 15 (see FIG. 1) of the sheath 16 is retracted, the winding tension on the dial portion 74 of the slide operation lines 40a and 40b is reduced or slackened.

  In the present embodiment, the tension of the slide operation lines 40a and 40b is adjusted to increase or decrease by the position adjustment mechanism 80 when a predetermined reference is given to one or more of the pair of slide operation lines 40a and 40b. It means that the tension can be increased or decreased at least from the state.

  In the catheter 10 of the present embodiment, the position adjustment mechanism 80 is screwed relative to the operation main body member 72 to increase or decrease the tension of the slide operation lines 40a and 40b. Can be finely adjusted.

  In the catheter 10 of the present embodiment, it is possible to increase the tension with respect to the slide operation lines 40 a and 40 b in which the base end 44 is fixed to the dial portion 74. Compared with the position adjustment mechanism and connector (not shown) in FIG. 6, the catheter 10 screws the position adjustment mechanism 80 and the connector 90 forward from the operation main body member 72 (to the left in the figure).

  When the male screw member 82 of the position adjusting mechanism 80 is screwed forward with respect to the operation main body member 72, the connector 90 fitted and fixed to the male screw member 82 advances together with the male screw member 82. Then, the sheath 16 to which the proximal end portion PE (see FIG. 6) is fixed with respect to the connector 90 and the operation wire tubule 30 (a, b) branched from the sheath 16 are entirely on the distal end side of the catheter 10. Move forward.

  On the other hand, since the base end 44 of the slide operation line 40 a is fixed to the operation line fixing portion 79 of the dial portion 74, the distal end portion 15 (see FIG. 1) of the sheath 16 advances, so that the slide operation line 40 a slides. The operation lines 40a and 40b generate winding tension around the dial portion 74 or increase the tension.

  As described above, in the catheter 10 of the present embodiment, the tension of the slide operation lines 40a and 40b is adjusted to increase and decrease by the operation of the position adjusting mechanism 80. For this reason, it becomes possible to adjust the slide operation lines 40a and 40b in a state where there is no slack and no tension, and “play” during the bending operation of the sheath 16 is suppressed, and the occurrence of unexpected bending of the sheath 16 is suppressed. .

  The stopper portion 84 of the position adjusting mechanism 80 is screwed into the screw groove 86 of the male screw member 82 and is screwed together with the male screw member 82 with respect to the female screw portion 81 (see FIG. 6). Here, when the male screw member 82 is moved forward with respect to the operation main body member 72 to increase the tension of the slide operation lines 40a and 40b, the stopper portion is formed by screwing the male screw member 82 with a predetermined advance length or more. 84 abuts against the proximal end portion of the operation main body member 72. Thereby, the male screw member 82 is not accidentally screwed excessively and the slide operation lines 40a and 40b are not broken.

  Further, when the operator mistakenly rotates the male screw member 82 when the sheath 16 is inserted into the body cavity, the advancement of the male screw member 82 is restricted by the stopper portion 84, so that the slide operation line is controlled. Unexpected tension does not occur in 40a and 40b. For this reason, the unexpected bending | flexion does not arise in the distal end part 15 (refer FIG. 4 and FIG. 1) of the sheath 16. FIG.

<Method for producing catheter>
Here, the manufacturing method of the catheter 10 of this Embodiment is demonstrated easily below with reference to FIG. 9 and FIG. In the method for manufacturing the catheter 10 of the present embodiment, the core wire support member 100 is prepared in which at least one through-hole 110 is formed through which the large-diameter resin tube 20 and the operation wire thin tube 30 (a, b) are inserted. .

  More specifically, as shown in FIG. 9, a small-diameter hole portion 111 through which the operation wire thin tubes 30 (a, b) are inserted into the outer peripheral portion of the large-diameter through hole 110 through which the large-diameter resin tube 20 is inserted. A core wire support member 100 is prepared.

  Then, as shown in FIGS. 9B and 10, the large-diameter resin tube 20 through which the core wire 120 is inserted is inserted into the through hole 110 of the core wire support member 100 together with the operation wire thin tubes 30 (a, b). The holding resin member 51 is wound around the large-diameter resin tube 20 inserted through the through hole 110 of the core wire support member 100 and the operation wire thin tube 30 (a, b).

  For example, eight of the holding resin members 51 are wound around the large-diameter resin tube 20 and the operation wire thin tubes 30 (a, b) simultaneously from the radial direction. As described above, as shown in FIG. 1, the semi-molten resin layer 50 is formed by winding the holding resin member 51 at intervals in order to facilitate bending at the distal end portion of the sheath 16 or the like. The holding resin member 51 is tightly wound around the proximal end portion of 16 to restrict bending.

  This is realized by reducing the winding speed of the holding resin member 51 at the distal end portion of the sheath 16 and increasing the winding speed of the holding resin member 51 at the proximal end portion of the sheath 16. Further, the eight holding resin members 51 are wound at the distal end portion of the sheath 16 as described above, and the sixteen holding resin members 51 are wound at the proximal end portion of the sheath 16. (Not shown).

  For example, when the holding resin member 51 is made of polyamide elastomer, the sheath 16 wound in a coil shape is heated at about 180 ° C. for about 15 to 30 seconds, so that at least the outer peripheral surface of the holding resin member 51 is formed. It is melted and fused to the large-diameter resin tube 20 and the operation wire thin tube 30 (a, b).

  The semi-molten resin layer 50 composed of the holding resin member 51 that has melted and solidified on the outer peripheral surface thereby securely fixes the operation wire tubes 30 (a, b) at predetermined positions on the outer peripheral surface of the large-diameter resin tube 20. The

  Further, in the catheter 10 of the present embodiment, the coiled semi-molten resin layer 50 has an elliptical shape because the operation wire capillaries 30 (a, b) are disposed on both sides of the outer peripheral surface of the cylindrical core wire 120. Will be wound on. For this reason, the catheter 10 of the present embodiment is easy to bend flexibly in the left-right direction in FIG. 2 and has good followability to blood vessels.

  On the other hand, although the flexibility in the vertical direction in FIG. 2 is lower than that in the horizontal direction, the vertical direction is actively bent by the operation of the slide operation line 40 (a, b). Insertion into is not obstructed.

  The present invention is not limited to the above-described embodiment, and includes various modifications and improvements as long as the object of the present invention is achieved. For example, in the above embodiment, only the holding resin member 51 is wound around the large-diameter resin tube 20 and the operation wire thin tube 30.

  However, the catheter may also have a wire having a melting point higher than that of the holding resin member 51, and the wire may be wound around the large-diameter resin tube 20 and the operation wire thin tube 30 together with the holding resin member 51 in a coil shape (not shown). ).

  In this case, the operation wire tubule 30 can be reliably fixed at a desired position by the holding resin member 51 as described above while securing the torque transmission property and kink resistance of the catheter by the wire. Nevertheless, since the wire and the holding resin member 51 are located in the same layer, the catheter does not become unnecessarily large in diameter.

  In the catheter as described above, a plurality of wires may be wound around the large-diameter resin tube 20 and the operation wire tubule 30 with respect to one holding resin member 51. In this case, the above-described wire characteristics can be amplified.

  Furthermore, the resin outer layer may be formed outside the holding resin member 51 and the wire, and the holding resin member 51 and the resin outer layer may be formed of the same material (not shown). In this case, the holding resin member 51 and the resin outer layer can be fused.

  Further, the holding resin member 51 and the wire may be wound at intervals at least at the position of the distal end portion of the large-diameter resin tube 20 and tightly wound at least at the position of the proximal end portion. Good (not shown).

  Further, at least a part of the distal end side of the operation wire tubule 30 is made of a thin tube coil and at least a part of the proximal end side is made of a hard resin tube, and the holding resin member 51 and the wire are made of the operation wire tubule 30 of a thin tube coil. It may be wound around at least a part of the position with a gap and tightly wound at least a part of the position made of the hard resin tube (not shown).

  Further, as shown in FIG. 1, in the above embodiment, the holding resin member 51 is wound around the large-diameter resin tube 20 and the operation wire thin tube 30 in a coil shape. However, the mesh-shaped holding resin member may be wound around the large-diameter resin tube 20 and the operation wire thin tube 30 and fused (not shown).

  Moreover, in the said form, it illustrated that the operation wire thin tube 30 (a, b) was formed with resin. However, the operation wire tubule may be formed of a tubule coil in which a fine holding resin member is wound (not shown).

  Since the operation wire tubule made of such a thin tube coil has high pressure resistance, it is difficult to be compressed when the holding resin member 51 of the semi-molten resin layer 50 is wound. Further, since the area of contact with the slide operation line 40 (a, b) is extremely reduced, the frictional force of the slide movement of the slide operation line 40 (a, b) can also be reduced.

  Further, in the above embodiment, the slide operation line 40 (a, b) protruding forward from the operation line thin tube 30 (a, b) is embedded in the resin of the outer layer 60 and connected to the distal end portion of the large diameter resin tube 20. Exemplified that However, like the catheter 130 illustrated in FIG. 11, at least a part of the distal end side of the operation wire tubule 30 (a, b) may be formed of the tubule coil 131.

  Such a thin tube coil 131 has a structure in which the ultrafine holding resin member 132 is wound to have the same diameter as the resin portion of the operation wire thin tube 30 (a, b), and is formed to have a total length of 20 to 200 mm, for example (see FIG. 11 is extremely shortened for simplicity of illustration). In such a catheter 130, since the sheath 16 is easily bent at the portion of the thin tube coil 131, the flexibility of the distal end portion of the sheath 16 can be improved.

  Further, as described above, the distal end side of the operation wire tubule 30 (a, b) is made of the thin tube coil 131 and the proximal end side is made of a hard resin tube harder than the large-diameter resin tube 20. The wire thin tubes 30 (a, b) may be wound at intervals at positions where the thin tube coils 131 are formed, and may be tightly wound at positions where they are formed of hard resin tubes (not shown).

  The semi-molten resin layer 50 may be wound from the tip of the position where the operation wire tubule 30 (a, b) is formed by the thin tube coil 131 or may be wound from the middle of the thin tube coil 131. In such a catheter 130, the flexibility of the distal end portion is extremely good, and the rigidity of the proximal end portion can be appropriately ensured.

  Further, in the catheters 10 and 130 described above, it is assumed that the marker 66 is disposed outside the position where the distal end portion of the operation wire tubule 30 (a, b) is embedded in the outer layer 60. However, the distal end portion of the operation wire capillary 30 (a, b) may be embedded in the outer layer 60 behind the position of the marker 66 (not shown).

  Further, in the above embodiment, the holding resin member 51 of the semi-molten resin layer 50 of the sheath 16 is tightly wound at the proximal end portion and wound one by one through the gap at the distal end portion. However, like the catheter 130 illustrated in FIG. 11, at the distal end of the sheath 16, the holding resin members 51 that are closely arranged by a predetermined number such as four are wound through a predetermined gap such as four. The semi-molten resin layer 50 may be formed by turning. In this case, the holding resin members 51 that are closely arranged by a predetermined number such as four may be wound around the large-diameter resin tube 20 in a ribbon shape, so that the productivity can be improved.

  Moreover, in the said form, it illustrated that the inside of the large diameter resin pipe 20 opened directly. However, an inner layer such as fluorine coat (PTFE) may be formed on the inner peripheral surface of such a large diameter resin tube 20 with a layer thickness of 15 μm or the like.

  When such an inner layer is formed, the above-described core wire 120 may be coated. Further, such an inner layer may be formed of a polyether block amide copolymer coat or the like (not shown).

  Furthermore, in the above embodiment, the distal end portion 15 of the sheath 16 can be deflected in two directions by adopting a structure in which the pair of slide operation lines 40 (a, b) is connected to one rotation operation member 70. Illustrated.

  However, the distal end portion 15 of the sheath 16 can be moved vertically and horizontally by connecting two pairs of slide operation lines 40 (a, b) to two rotation operation members 70 whose axial directions are orthogonal to each other. It can also be deflected in four directions (not shown).

  Furthermore, in the said form, it illustrated that the operation wire thin tube 30 (a, b) was located on the outer peripheral surface of the large diameter resin tube 20 whose cross-sectional shape is a perfect circle. However, like the catheters 140 and 150 illustrated in FIGS. 12 and 13, concave grooves 142 and 152 are formed on the outer peripheral surface of at least a part of the large diameter resin tubes 141 and 151, and the large diameter resin tubes 141 are formed. 151, at least a part of the operation wire tubule 30 (a, b) may be disposed in the concave grooves 142, 152.

  In the catheter 140 illustrated in FIG. 12, the operation wire tubules 30 (a, b) are arranged about halfway in the concave groove 142 of the large diameter resin tube 141. On the other hand, in the catheter 150 illustrated in FIG. 13, all of the operation wire thin tubes 30 (a, b) are disposed in the concave groove 152 of the large diameter resin tube 151.

  In these catheters 140 and 150, the operation wire thin tubes 30 (a, b) are not displaced on the outer peripheral surfaces of the large-diameter resin tubes 141, 151, so that the winding operation of the holding resin member 51 is performed stably and at high speed. Can do.

  In addition, in the catheter 150, the holding resin member 51 can be wound in a coil shape with a perfect cross-sectional shape, so that the up / down / left / right bending anisotropy due to the elliptical cross-sectional shape of the semi-molten resin layer 50 is eliminated. can do.

  In such a catheter 150, as shown in FIG. 14, a concave groove 152 is formed in substantially the entire length of the large diameter resin tube 151, and the operation wire tubule is formed in the entire concave groove 152 of the large diameter resin tube 151. 30 (a, b) may be arranged.

  When manufacturing such a catheter 150, as shown in FIGS. 15 and 16, a core wire 200 having a pair of concave grooves 210 formed on the outer peripheral surface is prepared. A large-diameter resin tube 151 made of a fluorine coat layer or the like is disposed on the outer peripheral surface, and the operation wire tubule 30 (a, b) is press-fitted into the position of the concave groove 210.

  In such a state, the large-diameter resin tube 151 into which the core wire 200 is inserted is inserted into the circular through hole 221 of the core wire support member 220 together with the operation wire thin tubes 30 (a, b), and the through hole of the core wire support member 220 is inserted. The semi-molten resin layer 50 may be formed by winding the holding resin member 51 around the large-diameter resin tube 151 and the operation wire thin tube 30 (a, b) inserted through the 221.

  In the above embodiment, the holding resin member 51 is wound in a state where only the operation wire tubes 30 (a, b) are arranged on the outer peripheral surface of the large-diameter resin tube 151. However, as shown in FIG. 17, the operation wire thin tubes 30 (a, b) and a large number of dummy resin wires 161 are closely arranged on the outer peripheral surface of the large-diameter resin tube 20, and the holding resin member 51 is placed thereon. May be wound.

  Also in this case, the operation wire thin tubes 30 (a, b) are not displaced on the outer peripheral surface of the large diameter resin tube 20. In addition, since the holding resin member 51 can be wound in a coil shape with a perfect cross-sectional shape, the anisotropy of bending in the vertical and horizontal directions due to the cross-sectional shape of the semi-molten resin layer 50 being elliptical can be eliminated. .

  Note that the dummy resin wire 161 is formed of a resin having a melting point sufficiently lower than that of the operation wire capillary 30 (a, b) and equivalent to that of the outer layer 60, so that the dummy resin wire 161 is melted when the outer layer 60 is formed. The operation wire tubule 30 (a, b) can be securely fixed.

  Similarly, as shown in FIG. 18, a dummy resin member 162 having a plate thickness equivalent to the diameter of the operation wire tubule 30 (a, b) and an arc-shaped cross section is formed, and this is formed on the outer periphery of the large diameter resin tube 20. The holding resin member 51 may be wound on both sides of the operation wire capillary 30 (a, b) on the surface.

  Moreover, in the said form, it illustrated that the operation wire thin tube 30 (a, b) was arrange | positioned on the outer peripheral surface of the large diameter resin tube 20. As shown in FIG. However, like the catheters 170 and 180 illustrated in FIG. 19 and FIG. 20, the operation wire tubule 30 (a, b) may be located in the lumen in at least a part of the large diameter resin tube 20.

  In this case, since the holding resin member 51 is directly wound around the large-diameter resin tube 20 at the portion where the operation wire thin tube 30 (a, b) is located in the lumen, the cross-sectional shape of the coiled semi-molten resin layer 50 Becomes a perfect circle, and the bending anisotropy in the vertical and horizontal directions due to the elliptical cross-sectional shape of the semi-molten resin layer 50 can be eliminated.

  In the catheter 170 illustrated in FIG. 19, the holding resin member 51 is wound around the outer side of the operation wire capillary 30 (a, b) located on the outer peripheral surface of the large-diameter resin tube 20 at the distal end. . On the other hand, in the catheter 180 illustrated in FIG. 20, the holding resin member 51 is wound on the outer peripheral surface of the large-diameter resin tube 20 at the distal end, and the operation wire tubule 30 (a, b) is wound on the outer peripheral surface. ) Is located.

  Further, as described above, the operation wire thin tubes 30 (a, b) are arranged on the outer peripheral surface of the large-diameter resin tube 20, and the whole is coated with a resin whose outer cross-sectional shape is a perfect circle. It is also possible to form a layer and to wind the holding resin member 51 on the outer peripheral surface of the intermediate layer so that the cross-sectional shape of the coiled semi-molten resin layer 50 is a perfect circle (not shown).

  Further, the operation wire tubules 30 (a, b) are directly arranged on the outer peripheral surface of the core wire 120 described above, and the whole is coated with a resin whose outer cross-sectional shape is a perfect circle to form a large-diameter resin tube. The holding resin member 51 can be wound on the outer peripheral surface of the diameter resin tube so that the cross-sectional shape of the coiled semi-molten resin layer 50 can be a perfect circle (not shown). Furthermore, a part or all of the operation wire thin tubes 30 (a, b) may be exposed to the lumen at the intermediate portion of the large diameter resin tube 20 and may be positioned up to the proximal end portion (not shown).

  Needless to say, the above-described embodiment and a plurality of modifications can be combined within a range in which the contents do not conflict with each other. Further, in the above-described embodiments and modifications, the structure of each part has been specifically described, but the structure and the like can be changed in various ways within a range that satisfies the present invention.

DESCRIPTION OF SYMBOLS 10 Catheter 15 Distal end part 16 Sheath 17 Proximal end part 20 Large diameter resin tube 30 (a, b) Operation wire thin tube 32 Base end part 40 (a, b) Slide operation line 41 Tip part 43 Base end part 44 End 50 Semi-molten resin layer 51 Holding resin member 60 Outer layer 64 Coat layer 66 Marker 70 Rotating operation member 72 Operation main body member 74 Dial part 75 Index part 76 Mark 77 (ad) Guide roller 78 Folding tube 79 (a, b) Operation line fixing portion 80 Position adjustment mechanism 81 Female screw portion 82 Male screw member 83 Through hole 84 Stopper portion 86 Screw groove 90 Connector 91 Tapered portion 92 Opening portion 100 Core wire support member 110 Through hole 111 Hole portion 120 Core wire 130 Catheter 131 Thin tube coil 132 Extra-fine holding resin member 140 Catheter 141 Large diameter resin tube 142 Concave groove 150 Catheter 151 Large diameter resin tube 152 Groove 161 dummy resin line 162 dummy resin member 170 catheter 180 the catheter 200 core 210 groove 220 core supporting member 221 through holes 741 shaft 742 drum portion DE distal end portion PE proximal end portion

Claims (13)

A large diameter resin tube in which a large diameter lumen is formed;
At least one small-diameter operating wire tubule located outside at least at the distal end of the large-diameter resin tube;
A slide operation line that is slidably inserted into the operation line thin tube and has a tip connected to at least the distal end of the large-diameter resin tube;
A holding resin member wound integrally with the large-diameter resin tube and the operation wire thin tube;
A catheter in which the holding resin member is fused to the operation wire tubule and the large-diameter resin tube.   The catheter according to claim 1, wherein a melting point of the holding resin member is lower than melting points of the large-diameter resin tube and the operation wire tubule. The elongated holding resin member is wound around the large diameter resin tube and the operation wire thin tube in a coil shape,
The catheter according to claim 1 or 2, wherein the holding resin member in a coil shape is fused to the operation line tubule and the large diameter resin tube. The wire further has a melting point higher than that of the holding resin member,
The catheter according to claim 3, wherein the wire is wound in a coil shape together with the holding resin member on the large-diameter resin tube and the operation wire tubule.   The catheter according to claim 4, wherein the wire is wound around the large-diameter resin tube and the operation wire tubule at a ratio of a plurality of wires to one holding resin member.   The catheter according to claim 4 or 5, wherein a resin outer layer is formed outside the holding resin member and the wire.   The catheter according to claim 6, wherein the holding resin member and the resin outer layer are formed of the same material.   The holding resin member and the wire are wound at intervals at least at the position of the distal end portion of the large-diameter resin tube and tightly wound at least at the position of the proximal end portion. Item 7. The catheter according to any one of Items 4 to 6. At least a part of the distal end side of the operation wire tubule is made of a thin tube coil and at least a part of the proximal end side is made of a hard resin pipe,
The holding resin member and the wire are wound tightly at least at a part of the hard resin tube and at least a part of the position of the hard resin tube. The catheter according to any one of claims 4 to 6, wherein the catheter is rotated. The holding resin member is formed in a mesh shape and wound around the large-diameter resin tube and the operation wire thin tube,
The catheter according to claim 1 or 2, wherein the mesh-shaped holding resin member is fused to the operation line tubule and the large-diameter resin tube. A concave groove is formed on the outer peripheral surface in at least a part of the longitudinal direction of the large-diameter resin tube,
The catheter according to any one of claims 1 to 10, wherein at least a part of the operation wire tubule is disposed in the concave groove of the large diameter resin tube.   The catheter according to any one of claims 1 to 11, wherein a spacer member is disposed on the outer peripheral surface of the large-diameter resin tube at a position where the operation wire tubule is not located. A method for manufacturing a catheter according to any one of claims 1 to 12,
Preparing a core wire support member in which at least one through-hole through which the large-diameter resin tube and the operation wire thin tube are inserted is prepared;
The large diameter resin tube through which the core wire is inserted is inserted into the through hole of the core wire support member together with the operation wire thin tube,
Winding the holding resin member integrally with the large diameter resin tube inserted through the through-hole of the core wire support member and the operation wire capillary tube,
A method for manufacturing a catheter in which the holding resin member is fused to the operation wire tubule and the large diameter resin tube.

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