Shaping instrument

Abstract

To provide a shaping instrument which enables an operator to easily make a medical instrument into a desired shape.SOLUTION: The shaping instrument used to shape a distal end of a medical instrument has a hollow shaft in which at least the distal end of the medical instrument is housed. The bending rigidity of a distal end side of the shaft is smaller than that of a rear end side of the shaft, and shaping of the distal end of the medical instrument is performed when the distal end side of the shaft is bent in a state of housing the medical instrument.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a shaping instrument used for shaping medical instruments such as guidewires. [Background technology]

[0002] Conventionally, there has been known a shaping instrument for changing the tip portion of a medical instrument into a shape of an operator's choice. Patent Document 1 describes a shaping instrument for a guidewire. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2014-68965 A Summary of the Invention [Problem to be solved by the invention]

[0004] When a medical instrument is shaped using a conventional shaping tool, the surgeon estimates the area of ​​the medical instrument to be shaped by eye and directly bends the medical instrument along the shaping tool to shape it. When shaping is performed in this way, it is sometimes difficult for the surgeon to deform the medical instrument into the shape he or she desires. In addition, the medical instrument may be damaged by being pressed against the shaping tool.

[0005] An object of the present invention is to provide a shaping tool that enables an operator to easily shape a medical instrument into a desired shape. [Means for solving the problem]

[0006] The present invention has been made to solve at least part of the above-mentioned problems, and can be realized in the following forms.

[0007] (1) One form of the present invention is a shaping instrument used to shape the tip of a medical instrument, the shaping instrument having a hollow shaft in which at least the tip of the medical instrument is housed, the bending stiffness at the tip end of the shaft being less than the bending stiffness at the rear end of the shaft, and the tip end of the shaft is bent while the medical instrument is housed therein to shape the tip of the medical instrument.

[0008] According to this configuration, the bending rigidity of the tip end side of the shaft is smaller than the bending rigidity of the rear end side of the shaft, so that the medical instrument inserted inside the shaft can be easily shaped.

[0009] (2) In the shaping tool of the above embodiment, the tip side of the shaft may have a slit provided along the outer periphery of the shaft.

[0010] According to this configuration, by providing a slit on the tip side of the shaft, the tip side of the shaft becomes flexible, and the medical instrument inserted inside the shaft can be more easily shaped.

[0011] (3) In the shaping tool of the above embodiment, the shaft may have a marker on its outer periphery.

[0012] According to this configuration, by providing a marker on the shaft, it becomes easier for the surgeon to shape the medical instrument into a shape suitable for treatment.

[0013] (4) In the shaping instrument of the above aspect, at least the tip side of the shaft may be formed of a coil.

[0014] According to this configuration, since the tip side of the shaft is formed from a coil, the tip side of the shaft becomes flexible, and the medical instrument inserted inside the shaft can be more easily shaped.

[0015] (5) One form of the present invention is a shaping instrument used to shape the tip of a medical instrument, the shaping instrument having a hollow shaft in which at least the tip of the medical instrument is housed, the shaft having a marker on its outer periphery, and the tip of the medical instrument is shaped by bending the tip side of the shaft while the medical instrument is housed therein.

[0016] According to this configuration, by providing a marker on the shaft, it becomes easier for the surgeon to shape the medical instrument into a shape suitable for treatment.

[0017] (6) One form of the present invention is a shaping instrument used to shape the tip of a medical instrument, the shaping instrument having a hollow shaft in which at least the tip of the medical instrument is housed, at least the tip side of the shaft being formed by a coil, and the tip side of the shaft is bent while the medical instrument is housed therein to shape the tip of the medical instrument.

[0018] According to this configuration, since the tip side of the shaft is formed from a coil, the tip side of the shaft becomes flexible, and the medical instrument inserted inside the shaft can be more easily shaped.

[0019] The present invention can be realized in various aspects, for example, as an instrument for shaping medical instruments such as a guidewire, a catheter, or a dilator. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is an explanatory diagram illustrating an example of the overall configuration of a shaping tool according to a first embodiment. [Diagram 2] FIG. 13 is an explanatory diagram illustrating the tip of the shaping tool. [Diagram 3] 11A to 11C are explanatory diagrams illustrating a method of using the shaping tool. [Figure 4] 13A and 13B are explanatory diagrams illustrating a method of using a conventional shaping tool. [Diagram 5]FIG. 11 is an explanatory diagram illustrating the overall configuration of a shaping tool according to a second embodiment. [Figure 6] FIG. 11 is an explanatory diagram illustrating the tip portion of a shaping tool according to a second embodiment. [Figure 7] FIG. 13 is an explanatory diagram illustrating the overall configuration of a shaping tool according to a third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] First Embodiment FIG. 1 is an explanatory diagram illustrating an example of the overall configuration of a shaping tool 1 of the first embodiment. The shaping tool 1 will be described with reference to FIGS. 1 to 3. The sizes of the components of the shaping tool 1 shown in FIGS. 1 to 3 are illustrative and may be expressed on a scale different from the actual size. In the following, the end portion of each component of the shaping tool 1 located on the tip side will be referred to as the "tip", and the portion including the "tip" and extending from the tip to the middle toward the rear end will be referred to as the "tip portion". Similarly, the end portion of each component located on the rear end side will be referred to as the "rear end", and the portion including the "rear end" and extending from the rear end to the middle toward the tip side will be referred to as the "rear portion".

[0022] The shaping instrument 1 is an instrument used to change a medical instrument such as a guidewire into a shape desired by an operator. For example, the shaping instrument 1 is used by an operator to give a shape (shape) to the tip of the guidewire 200 (FIG. 3) before the guidewire is inserted into a blood vessel, a digestive organ, or the like. By shaping, the tip of the guidewire 200 is curved at a predetermined angle over a predetermined range from the tip. In this way, the shaping instrument 1 is used to change the tip of the guidewire 200 into a shape suitable for the shape of a blood vessel or a digestive organ.

[0023] The shaping tool 1 is configured so that a guidewire 200 can be inserted inside. The surgeon can bend the tip of the guidewire 200 by aligning the tip 201 (FIG. 3) of the guidewire 200 inserted inside the shaping tool 1 with the tip 11 of the shaft 10 and bending the tip of the shaping tool 1.

[0024] As shown in FIG. 1, the shaping tool 1 has a shaft 10 and a grip portion 100 .

[0025] The shaft 10 is a hollow member extending in the longitudinal direction of the shaping tool 1. The shaft 10 is cylindrical and has an internal space 12 therein. By making the diameter of the internal space 12 larger than a 0.014 inch guide wire, a 0.035 inch guide wire, or the like, it is possible to insert a general guide wire into the inside of the shaping tool 1.

[0026] The shaft 10 has a slit 30 and a marker 50 on the tip side. The slit 30 is a linear opening that communicates between the internal space 12 of the shaft 10 and the outside of the shaft 10. The slit 30 is provided on the outer periphery of the shaft 10 along the circumferential direction of the shaft 10. A plurality of slits 30 are provided along the longitudinal direction of the shaft 10. The marker 50 is a mark for indicating the distance from the tip 11 of the shaft 10. The marker 50 is provided on the outer periphery of the shaft 10 along the circumferential direction of the shaft 10. A plurality of markers 50 are provided along the longitudinal direction of the shaft 10. The slits 30 and the markers 50 will be described in detail later.

[0027] The material of the shaft 10 is not particularly limited, but examples of usable materials include stainless steel (SUS302, SUS304, SUS316, etc.), superelastic alloys such as Ni-Ti alloys, piano wire, nickel-chromium alloys, cobalt alloys, platinum, gold, tungsten, etc.

[0028] The gripping portion 100 is a cylindrical member located on the rear end side of the shaft 10 in the longitudinal direction of the shaping tool 1. The tip end of the gripping portion 100 is fixed to the rear end of the shaft 10. The outer diameter of the rear end of the gripping portion 100 is larger than the outer diameter of the shaft 10, and the surgeon can operate the shaping tool 1 by gripping the rear end of the gripping portion 100. The gripping portion 100 has an internal space 112 on the inside, and the internal space 112 is connected to the internal space 12 of the shaft 10. The surgeon can insert a guidewire 200 (FIG. 3) from the rear end side of the gripping portion 100 into the internal space 112 and advance the guidewire 200 into the internal space 12 of the shaft 10.

[0029] <Details of Slit 30> 2 is an explanatory diagram illustrating the tip of the shaping tool 1. As described above, a plurality of slits 30 are provided along the longitudinal direction of the shaft 10. A part of the shaft 10 located between adjacent slits 30 in the longitudinal direction of the shaft 10 is called the "main body 13." As described above, the slits 30 are linear openings along the circumferential direction of the outer periphery of the shaft 10. In other words, the length of the slits 30 along the circumferential direction of the shaft 10 is greater than the length of the slits 30 along the longitudinal direction of the shaft 10 (the width of the slits 30).

[0030] The length of each slit 30 along the circumferential direction of the shaft 10 is approximately half the length of the outer circumference of the shaft 10 in the circumferential direction. Two slits 30 are provided at the same position in the longitudinal direction of the shaft 10. For example, FIG. 2 shows a slit 31 and a slit 32 provided at the same position in the longitudinal direction of the shaft 10. Between the slit 31 and the slit 32, a connecting portion 14 of the shaft 10 is provided. The connecting portion 14 is a part of the shaft 10 that is provided between the adjacent main body portions 13 with the slit 30 therebetween and connects the adjacent main body portions 13 to each other. The connecting portion 14 is also provided between two slits 30 provided at the same position in the longitudinal direction of the shaft 10 other than the slit 31 and the slit 32. That is, at the tip portion of the shaft 10, the main body portions 13 and the slits 30 are alternately formed along the longitudinal direction of the shaft 10, and the adjacent main body portions 13 are connected by the connecting portion 14. Due to the slit 30, the bending rigidity of the tip side of the shaft 10 is smaller than the bending rigidity of the rear end side of the shaft 10. This allows the distal end side of the shaft 10 to be easily bent by the surgeon.

[0031] In this embodiment, the slits 30 penetrate the shaft 10, but the slits 30 do not have to penetrate the shaft 10. For example, the slits 30 may be recesses provided along the circumferential direction of the outer periphery of the shaft 10 and having a depth smaller than the thickness of the shaft 10. The recesses locally reduce the thickness of the shaft 10, so that the bending rigidity of the tip end side of the shaft 10 can be made smaller than the bending rigidity of the rear end side of the shaft 10.

[0032] <Details of Marker 50> The marker 50 is a mark for indicating the distance from the tip 11 of the shaft 10 in the longitudinal direction of the shaft 10. The appearance (color and gloss) of the marker 50 is different from the appearance (color and gloss) of the outer periphery of the shaft 10, allowing the surgeon to easily visually recognize the position of the marker 50 on the outer periphery of the shaft 10. The marker 50 is a linear member extending circumferentially around the outer periphery of the shaft 10.

[0033] A plurality of markers 50 are provided on the outer circumference of the main body 13 of the shaft 10 along the longitudinal direction of the shaft 10. The distance between the marker 50 closest to the tip 11 of the shaft 10 and the tip 11 of the shaft 10 is called "distance L1". The distance between adjacent markers 50 in the longitudinal direction of the shaft 10 is called "distance L2". The distances L1 and L2 can be set to distances suitable for shaping the medical device. For example, the distances L1 and L2 can be in the range of 0.1 mm to 10 mm. Also, for example, by setting the distances L1 and L2 to 0.5 mm, the surgeon can easily determine the range of shaping using the markers 50 as a guide, and the guidewire 200 (FIG. 3) can be easily deformed into a shape suitable for treatment.

[0034] The marker 50 can be formed, for example, by fixing a linear resin or the like to the outer periphery of the shaft 10. Alternatively, the marker 50 can be formed by irradiating a laser or the like along the outer periphery of the shaft 10 to make the appearance of a part of the outer periphery of the shaft 10 different from the appearance of the other parts.

[0035] In this embodiment, the marker 50 is provided on the outer periphery of the main body portion 13 of the shaft 10, and the marker 50 and the slit 30 are provided at different positions in the longitudinal direction of the shaft 10. However, the marker 50 and the slit 30 may be provided at the same position in the longitudinal direction of the shaft 10. For example, by providing the marker 50 on the outer periphery of the connecting portion 14 of the shaft 10, the marker 50 and the slit 30 are provided at the same position in the longitudinal direction of the shaft 10.

[0036] FIG. 3 is an explanatory diagram illustrating a method of using the shaping tool 1. The method of using the shaping tool 1 will be described using a method of shaping the guidewire 200 as an example. The surgeon inserts the guidewire 200 into the internal space 112 of the gripping part 100 from the rear end side of the gripping part 100, and advances the guidewire 200 into the internal space 12 of the shaft 10. The surgeon aligns the position of the tip 201 of the guidewire 200 with the tip 11 of the shaft 10, and bends the tip of the guidewire 200 together with the shaft 10. At this time, the surgeon can adjust the range of the guidewire 200 to be shaped using the marker 50 as a guide. For example, if the surgeon wants to shape the range of the guidewire 200 from the tip 201 of the guidewire 200 to the rear end side by 5 mm, the surgeon aligns the position of the tip 201 of the guidewire 200 with the tip 11 of the shaft 10, and bends the shaft 10 using the marker 50 located 5 mm from the tip 11 of the shaft 10 as a guide. This allows the guidewire 200 to be deformed into any shape within a range of up to 5 mm from the tip 201 of the guidewire 200 toward the rear end. After confirming that the guidewire 200 has been deformed into the desired shape, the surgeon can pull out the guidewire 200 from the tip side of the shaft 10, and use the guidewire 200 for treatment.

[0037] According to the shaping instrument 1 of the present embodiment described above, the bending stiffness of the tip end side of the shaft 10 is smaller than the bending stiffness of the rear end side. Because the tip end side of the shaft 10 is flexible, the shaft 10 can be bent with the medical instrument inserted therethrough to give a shape to the tip of the medical instrument. This allows the surgeon to easily give a shape to the medical instrument.

[0038] 4 is an explanatory diagram illustrating a method of using a conventional shaping tool 1Z. The shaping tool 1Z differs from the shaping tool 1 of this embodiment in that the bending rigidity of the tip end side of the shaft 10Z is not smaller than the bending rigidity of the rear end side. Among the configurations of the conventional shaping tool 1Z, the description of the configurations common to the configuration of the shaping tool 1 of this embodiment will be omitted.

[0039] The conventional shaping tool 1Z does not have a slit 30 (FIG. 2) at the tip of the shaft 10Z, so that the tip is not flexible, and it is difficult for the surgeon to bend the shaft 10Z. This makes it difficult to bend the shaft 10Z and shape the guidewire 200 in a state where a medical instrument is inserted inside the shaft 10Z, as with the shaping tool 1 of the present embodiment. When shaping the guidewire 200 using the conventional shaping tool 1Z, the surgeon protrudes the tip 201 of the guidewire 200 toward the tip side beyond the tip 11Z of the shaft 10Z, and bends the tip of the guidewire 200 with the tip 11Z of the shaft 10Z as a support. In this case, a strong load is applied to the portion 202 of the guidewire 200 that strongly contacts the tip 11Z of the shaft 10Z due to bending deformation. This may cause the guidewire 200 to break. For example, if the outer periphery of the guidewire 200 is covered with a coil or the like, the pitch of the wire of the coil may become disturbed. On the other hand, the shaping device 1 of this embodiment can reduce the possibility of the guidewire 200 being damaged by shaping by bending the shaft 10 with the guidewire 200 inserted inside the shaft 10.

[0040] The shaft 10 has a slit 30 on the tip side. The slit 30 makes the tip side of the shaft 10 flexible, and the tip side of the shaft 10 can be bent more easily. This makes it easier to shape the medical instrument inserted inside the shaft 10.

[0041] The shaft 10 has a marker 50 which serves as a guide for the distance from the tip 11 of the shaft 10. The surgeon can easily shape the medical instrument inserted inside the shaft 10 to a desired range by bending the shaft 10 using the marker 50 as a guide. This allows the surgeon to easily shape the medical instrument to a shape suitable for treatment.

[0042] <Second embodiment> 5 is an explanatory diagram illustrating the overall configuration of a shaping device 1B of the second embodiment. The shaping device 1B is different in that a shaft 10B is formed of a coil. Among the configuration of the shaping device 1B, the description of the configuration common to the configuration of the shaping device 1 will be omitted.

[0043] The shaft 10B is a coil formed of a wire 60B wound in a spiral shape in the longitudinal direction of the shaping tool 1B. A marker 50B is formed on the outer periphery of a portion of the wire 60B at the tip side of the shaft 10B. The shaft 10B has an internal space 12B on the inside.

[0044] 6 is an explanatory diagram illustrating the tip of a shaping tool 1B of the second embodiment. A plurality of markers 50B are provided on the outer periphery of the wire 60B along the longitudinal direction of the shaft 10B. In this embodiment, the markers 50B have a width substantially equal to the outer diameter of the wire 60B. A spiral slit 30B is formed between adjacent wires 60B. The slit 30B allows the shaft 10B to be easily bent by the surgeon.

[0045] The material of the wire 60B is not particularly limited, but examples of usable materials include stainless steel (SUS302, SUS304, SUS316, etc.), superelastic alloys such as Ni-Ti alloys, piano wire, nickel-chromium alloys, cobalt alloys, platinum, gold, tungsten, etc.

[0046] In the shaping tool 1B of the second embodiment, the bending rigidity of the tip side of the shaft 10B may be smaller than the bending rigidity of the rear end side of the shaft 10B. For example, by making the outer diameter of the wire 60B on the tip side of the shaft 10B smaller than the outer diameter of the wire 60B on the rear end side of the shaft 10B, the bending rigidity of the tip side of the shaft 10B can be made smaller than the bending rigidity of the rear end side of the shaft 10B. Alternatively, by making the pitch of the wire 60B on the tip side of the shaft 10B larger than the pitch of the wire 60B on the rear end side of the shaft 10B, the bending rigidity of the tip side of the shaft 10B can be made smaller than the bending rigidity of the rear end side of the shaft 10B. In addition, in the shaping tool 1B of the second embodiment, the bending rigidity of the shaft 10B may be constant in the longitudinal direction of the shaft 10B. If the shaft 10B is configured to have a bending rigidity that allows the surgeon to bend it, the shaft 10B and the medical instrument inserted inside the shaft 10B can be bent. The shaping tool 1B also enables the surgeon to easily shape the medical tool.

[0047] <Third embodiment> 7 is an explanatory diagram illustrating the overall configuration of a shaping device 1C of the third embodiment. The shaping device 1C differs from the shaping device 1 of the first embodiment in that a shaft 10C is formed of a coil portion 70C and a pipe portion 80C. Among the configurations of the shaping device 1C, the description of the configurations common to the shaping device 1 will be omitted.

[0048] The tip side of the shaft 10C is formed by a coil section 70C formed by wire 71C wound in a spiral shape in the longitudinal direction of the shaping tool 1C. The rear end side of the shaft 10C is formed by a cylindrical pipe section 80C. The rear end of the coil section 70C and the tip end of the pipe section 80C are connected. A marker 50C is formed on the outer periphery of a part of the wire 71C at the tip side of the coil section 70C. An internal space 12C is provided inside the coil section 70C and the pipe section 80C, and a medical instrument can be inserted therethrough. A spiral slit 30C is formed between adjacent wires 71C. This slit 30C allows the tip side of the shaft 10C to be easily bent by the surgeon.

[0049] Since the bending rigidity of the coil portion 70C is smaller than the bending rigidity of the pipe portion 80C, the surgeon can easily bend the coil portion 70C. The shaping instrument 1C also allows the surgeon to shape the medical instrument while the medical instrument is inserted inside the shaft 10C. This allows the surgeon to easily shape the medical instrument.

[0050] <Modification> The present invention is not limited to the above-described embodiment, and can be embodied in various forms without departing from the spirit and scope of the invention. For example, the following modifications are also possible.

[0051] <Variation 1> In the shaping device 1 of the first embodiment, the slits 30 are provided only on the tip side of the shaft 10. However, the slits 30 may be provided on the rear end side of the shaft 10. For example, the slits 30 may be provided from the tip side to the rear end side of the shaft 10. In this case, for example, by increasing the width of the slits 30 from the rear end side to the tip side, the bending rigidity of the tip side of the shaft 10 can be made smaller than the bending rigidity of the rear end side of the shaft 10.

[0052] <Variation 2> In the shaping tool 1C of the third embodiment, the pipe portion 80C of the shaft 10C does not have a slit 30 (FIG. 2). However, the pipe portion 80C of the shaft 10C may have a slit 30. Also, in the shaping tool 1C of the third embodiment, the coil portion 70C is provided at the tip end of the shaft 10C, and the pipe portion 80C is provided at the rear end of the shaft 10C. However, the pipe portion 80C may be provided at the tip end of the shaft 10C, and the coil portion 70C may be provided at the rear end of the shaft 10C.

[0053] <Modification 3> In the shaping device (1, 1B, 1C) of the first to third embodiments, the markers (50, 50B, 50C) are linear members that run along the circumferential direction of the outer periphery of the shaft (10, 10B, 10C). However, the markers (50, 50B, 50C) may be formed in a dotted or circular shape, or may be a pattern of projections and recesses formed on the outer periphery of the shaft (10, 10B, 10C).

[0054] <Modification 4> In the shaping instruments (1, 1B, 1C) of the first to third embodiments, the shafts (10, 10B, 10C) are directly connected to the grip portion 100. However, the shafts (10, 10B, 10C) may be indirectly connected to the grip portion 100. [Explanation of symbols]

[0055] 1…Shaping tool 10…Shaft 11...Shaft tip 12…Interior space 13...Main body 14...Connection part 30…Slit 50…Marker 60B…Element wire 70C…Coil section 71C…Element wire 80C…Pipe section 100...Gripping part 112…Interior space L1: Distance from the tip of the shaft to the marker L2: Distance between adjacent markers 200…Guidewire 201...Guide wire tip

Claims

1. A shaping tool used to shape the tip of a medical instrument, a hollow shaft in which at least the tip portion of the medical instrument is housed; the bending rigidity of the tip end side of the shaft is smaller than the bending rigidity of the rear end side of the shaft, A shaping tool that shapes the distal end of the medical device by bending the distal end side of the shaft while the medical device is housed therein.

2. The shaping tool according to claim 1, A shaping tool, wherein the tip side of the shaft has a slit provided along the outer periphery of the shaft.

3. The shaping tool according to claim 1 or 2, A shaping tool, wherein the shaft has markers on its outer periphery.

4. The shaping tool according to claim 1 or 2, A shaping tool, wherein at least the distal end side of the shaft is formed by a coil.

5. A shaping tool used to shape the tip of a medical instrument, a hollow shaft in which at least the tip portion of the medical instrument is housed; the shaft has markers on its outer periphery; A shaping tool that shapes the distal end of the medical device by bending the distal end side of the shaft while the medical device is housed therein.

6. A shaping tool used to shape the tip of a medical instrument, a hollow shaft in which at least the tip portion of the medical instrument is housed; At least a distal end side of the shaft is formed by a coil, A shaping tool that shapes the distal end of the medical device by bending the distal end side of the shaft while the medical device is housed therein.

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