Catheter system, catheter anchoring system, body to be fixed, and fixture

Abstract

To provide a catheter system capable of matching distal side wire projection length with target length with a high degree of precision.SOLUTION: A catheter system 1 comprises a catheter device 10 and a fixture 20. The catheter device comprises: a tube part 11 having a first passage; a connection 12 having a second passage extending along a liner line; and a wire 13 running inside the first passage and the second passage. With the connection detachably fixed at a fixing position so that the second passage extends in an extending direction, the fixture has a mark at a position separated by a separation distance from the fixing position in the extending direction. The separation distance is a distance obtained by subtracting the sum of target length, which is the target value for distal side wire projection length (the length of a wire from the tube distal end till the wire distal end), and the length of the first passage and the second passage from the tube distal end to the fixing position, from the entire length of the wire, with the connection fixed to the fixture.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a catheter system, a catheter fixing system, a fixed body, and a fixing device. [Background technology]

[0002] A catheter system including a catheter device and a fixture is known. For example, in the catheter system described in Patent Document 1, the catheter device includes a tube portion having a first passage, a connecting portion having a second passage that communicates with the first passage at a proximal end that is the end on the proximal side of the tube portion and extends along a straight line, and a wire that passes through the inside of the first passage and the second passage. Furthermore, the connecting portion is fixed to the fixture. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5124057 Summary of the Invention [Problem to be solved by the invention]

[0004] However, if the distal wire protrusion length, which is the length of the wire from the tubular distal end, which is the distal end of the tubular portion, to the wire distal end, which is the distal end of the wire, does not match the target length with high accuracy, it is difficult for the user to properly operate the tubular distal end. Therefore, during use of the catheter device, the distal wire protrusion length is measured by taking an X-ray of the area including the tubular distal end and the wire distal end.

[0005] However, for example, when the distal end of the tube is considerably thin, it is often difficult to measure the distal wire protrusion length by imaging, and therefore there is a problem in that the distal wire protrusion length cannot be matched to the target length with high accuracy.

[0006] One object of the present invention is to match the distal wire extension length to a target length with high accuracy. [Means for solving the problem]

[0007] In one aspect of the present invention, a catheter system includes a catheter device and a fixture. The catheter device comprises a tubular portion having a first passage, a connecting portion having a second passage that communicates with the first passage at a proximal end that is the proximal end of the tubular portion and extends along a straight line, and a wire that passes through the inside of the first passage and the second passage. The fastener has a connection portion removably fixed at a fixed position such that the second passage extends in the extension direction, and has a mark at a position spaced a distance from the fixed position in the extension direction.

[0008] The separation distance is the total length of the wire minus the sum of the target length, which is the target value of the distal wire protrusion length, which is the length of the wire from the distal end of the tube portion, which is the distal end of the tube portion, to the distal end of the wire, which is the distal end of the wire, when the connection portion is fixed to the fixing device, and the length of the first and second passages from the distal end of the tube portion to the fixed position.

[0009] In another aspect of the present invention, a catheter fixing system includes a fixable body and a fixing device. The fixed body constitutes at least a part of the connection portion of a catheter device which includes a tubular portion having a first passage, a connection portion having a second passage which communicates with the first passage at a proximal end which is the proximal end of the tubular portion and extends along a straight line, and a wire which passes through the inside of the first passage and the second passage.

[0010] The fixing device removably fixes the fixed body at a fixed position such that the second passage extends in the extension direction, and has a mark at a position spaced a distance from the fixed position in the extension direction.

[0011] The separation distance is the total length of the wire minus the sum of the target length, which is the target value of the distal wire protrusion length, which is the length of the wire from the distal end of the tubular portion, which is the distal end of the tubular portion, to the distal end of the wire, which is the distal end of the wire, when the fixed body is fixed to the fixing device, and the length of the first and second passages from the distal end of the tubular portion to the fixing position.

[0012] In another aspect of the present invention, the fixed body constitutes at least a part of a connection portion of a catheter device including a tubular portion having a first passage, a connection portion having a second passage that communicates with the first passage at a proximal end that is the proximal end of the tubular portion and extends along a straight line, and a wire that passes through the inside of the first passage and the second passage.

[0013] The fixed body is removably fixed to the fixing tool at a fixed position such that the second passage extends in the extension direction. The fixture has a mark at a position spaced a distance from the fixing position in the extension direction. The separation distance is the total length of the wire minus the sum of the target length, which is the target value of the distal wire protrusion length, which is the length of the wire from the distal end of the tubular portion, which is the distal end of the tubular portion, to the distal end of the wire, which is the distal end of the wire, when the fixed body is fixed to the fixing device, and the length of the first and second passages from the distal end of the tubular portion to the fixing position. The fixed body has a protrusion that protrudes in a direction perpendicular to the second passage. The fixture has a recess into which at least a portion of the protrusion fits.

[0014] In another aspect of the present invention, the fixing device fixes the connection portion of a catheter device including a tubular portion having a first passage, a connecting portion having a second passage communicating with the first passage at a proximal end that is the proximal end of the tubular portion and extending along a straight line, and a wire passing through the inside of the first passage and the second passage.

[0015] The fastener has a connection portion removably fixed at a fixed position such that the second passage extends in the extension direction, and has a mark at a position spaced a distance from the fixed position in the extension direction. The separation distance is the total length of the wire minus the sum of the target length, which is the target value of the distal wire protrusion length, which is the length of the wire from the distal end of the tube portion, which is the distal end of the tube portion, to the distal end of the wire, which is the distal end of the wire, when the connection portion is fixed to the fixing device, and the length of the first and second passages from the distal end of the tube portion to the fixed position. Effect of the Invention

[0016] The distal wire extension length can be matched to a target length with high precision. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a perspective view of a catheter system according to a first embodiment. [Diagram 2] FIG. 1 is a plan view of a catheter system according to a first embodiment. [Diagram 3] FIG. 1 is a side view of a catheter system according to a first embodiment. [Figure 4] FIG. 2 is a partially enlarged cross-sectional view of the catheter system according to the first embodiment. [Diagram 5] FIG. 1 is a perspective view of a catheter system according to a first embodiment. [Figure 6] FIG. 1 is a perspective view of a catheter system according to a first embodiment. [Figure 7] FIG. 2 is a plan view of a catheter system according to a first modified example of the first embodiment. [Figure 8] FIG. 2 is a partially enlarged cross-sectional view of a catheter system according to a first modified example of the first embodiment. [Figure 9] FIG. 2 is a perspective view of a catheter system according to a first modified example of the first embodiment. [Figure 10] FIG. 2 is a perspective view of a catheter system according to a first modified example of the first embodiment. [Figure 11] FIG. 11 is a perspective view of a catheter system according to a second embodiment. [Figure 12] FIG. 11 is a plan view of a catheter system according to a second embodiment. [Figure 13]FIG. 11 is a side view of a catheter system according to a second embodiment. [Figure 14] FIG. 11 is a perspective view of a catheter system according to a second embodiment. [Figure 15] FIG. 11 is a perspective view of a catheter system according to a second embodiment. [Figure 16] FIG. 11 is a perspective view of a catheter system according to a second embodiment. [Figure 17] FIG. 11 is a plan view of a catheter system according to a first modified example of the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, embodiments of a catheter system, a catheter fixing system, a fixed body, and a fixing tool of the present invention will be described with reference to Figs.

[0019] First Embodiment (overview) The catheter system of the first embodiment includes a catheter device and a fixture. The catheter device comprises a tubular portion having a first passage, a connecting portion having a second passage that communicates with the first passage at a proximal end that is the proximal end of the tubular portion and extends along a straight line, and a wire that passes through the inside of the first passage and the second passage.

[0020] The fastener has a connection portion removably fixed at a fixed position such that the second passage extends in the extension direction, and has a mark at a position spaced a distance from the fixed position in the extension direction.

[0021] The separation distance is the total length of the wire minus the sum of the target length, which is the target value of the distal wire protrusion length, which is the length of the wire from the distal end of the tube portion, which is the distal end of the tube portion, to the distal end of the wire, which is the distal end of the wire, when the connection portion is fixed to the fixing device, and the length of the first and second passages from the distal end of the tube portion to the fixed position.

[0022] According to this, by fixing the connection portion to the fixing device and matching the position of the proximal end of the wire, which is the proximal end of the wire, with the position of the mark in the extension direction, the distal wire protrusion length can be matched to the target length with high accuracy. Next, the catheter system of the first embodiment will be described in more detail.

[0023] (composition) Hereinafter, the catheter system 1 of the first embodiment will be described using a right-handed Cartesian coordinate system having an x-axis, a y-axis, and a z-axis as shown in Figures 1 to 6. Note that in this specification, a similar coordinate system is also used in Figures 7 to 17 described later.

[0024] In this example, the x-axis direction, the y-axis direction, and the z-axis direction may be respectively expressed as the left-right direction of the catheter system 1, the front-rear direction of the catheter system 1, and the up-down direction of the catheter system 1. Also, in this example, the positive direction of the x-axis, the negative direction of the x-axis, the positive direction of the y-axis, the negative direction of the y-axis, the positive direction of the z-axis, and the negative direction of the z-axis may be respectively expressed as the rightward direction of the catheter system 1, the leftward direction of the catheter system 1, the forward direction of the catheter system 1, the rearward direction of the catheter system 1, the upward direction of the catheter system 1, and the downward direction of the catheter system 1. In this example, the positive direction of the z axis and the negative direction of the z axis correspond to the vertically upward direction and the vertically downward direction, respectively.

[0025] As shown in FIGS. 1 to 6 , the catheter system 1 includes a catheter device 10 and a fixture 20. In this example, the catheter device 10 is used for intravascular surgery by being introduced into the blood vessels of a living body. For example, the catheter device 10 is used for injecting a contrast agent or a drug, transporting a coil for embolizing a blood vessel or an aneurysm, or transporting a treatment device for removing a thrombus or dilating a stenosis. For example, the catheter device 10 is used for treatment of blood vessels in the brain. Note that the catheter device 10 may also be used for treatment of blood vessels in a living body other than blood vessels in the brain.

[0026] Fig. 1 is a view of the catheter system 1 as viewed from a position to the right, rear, and above the catheter system 1 (in other words, a right rear upper perspective view). Fig. 2 is a view of the catheter system 1 as viewed from above the catheter system 1 (in other words, a plan view). Fig. 3 is a view of the catheter system 1 as viewed from the right of the catheter system 1 (in other words, a right side view).

[0027] Fig. 4 is a diagram showing a part of a cross section of the catheter system 1 cut along a plane represented by line IV-IV in Fig. 2, viewed in the positive direction of the y axis. Fig. 5 is a right rear upper perspective view of the catheter system 1 in a state in which the catheter device 10 has been separated from the fixture 20. Fig. 6 is a diagram showing the catheter system 1 as viewed from a position to the right of, behind, and below the catheter system 1 (in other words, a right rear lower perspective view) in a state in which the catheter device 10 has been separated from the fixture 20.

[0028] The catheter device 10 comprises a tube portion 11 , a connection portion 12 , and a wire 13 . The tube portion 11 is a tubular body. Therefore, the tube portion 11 has a first passage inside the tube portion 11 over the entire length of the tube portion 11. The first passage may be expressed as a lumen. The tube portion 11 is flexible. In this example, a cross section of the tube portion 11 cut by a plane perpendicular to the longitudinal direction of the tube portion 11 is annular.

[0029] In this example, the length of the tube 11 is 1.50 m, 1.53 m, 1.56 m, 1.57 m, 1.60 m, or 1.65 m. The length of the tube 11 may be 0.50 m to 2.0 m. For example, the length of the tube 11 used for blood vessels in the head is often 1.50 m to 1.65 m. The length of the tube 11 used for blood vessels in the abdomen is often 1.10 m to 1.50 m. In this example, the outer diameter of the cross section of the tube portion 11 is 0.3 mm to 1 mm. The outer diameter of the cross section of the tube portion 11 may be 1 mm to 5 mm. In this example, the inner diameter of the cross section of the pipe portion 11 (in other words, the diameter of the first passage) is 0.2 mm to 0.9 mm. The inner diameter of the cross section of the pipe portion 11 may be 0.9 mm to 4.5 mm.

[0030] 1 to 6 show the proximal end portion of the tubular portion 11, and omit the depiction of the portion of the tubular portion 11 that is distal to the proximal end portion. Similarly, in Figs. 7 to 17 described below, the depiction of the portion of the tubular portion 11 that is distal to the proximal end portion is omitted.

[0031] In this specification, the distal side corresponds to the side closer to the tip of the catheter device 10 (in this example, the tip of the tube portion 11 or wire 13 which is the head of the catheter device 10 when introduced into a blood vessel). Also, in this specification, the proximal side corresponds to the side farther from the tip of the catheter device 10.

[0032] The connecting portion 12 has a second passage inside the connecting portion 12. The second passage communicates with the first passage of the tubular portion 11 at a proximal end, which is the end on the proximal side of the tubular portion 11, and extends along a straight line. In this example, the second passage is cylindrical and extends along a straight line. In this example, the diameter of the second passage is equal to the diameter of the first passage. Note that the diameter of the second passage may be different from the diameter of the first passage.

[0033] The connection portion 12 includes a distal portion 121 adjacent to the tube portion 11 , an intermediate portion 122 adjacent to the distal portion 121 , and a proximal portion 123 adjacent to the intermediate portion 122 .

[0034] Each of the distal portion 121, the intermediate portion 122, and the proximal portion 123 has a passage therein that constitutes the second passage. The distal portion 121 is connected to the tube portion 11 at the proximal end of the tube portion 11. In this example, the distal portion 121 is integrally formed with the tube portion 11. The distal portion 121 may be referred to as a hub.

[0035] The intermediate portion 122 is connected to the distal portion 121 at a proximal end of the distal portion 121. In this example, the intermediate portion 122 is cylindrical with a central axis extending along the second passageway. The intermediate portion 122 is removably fixed to the distal portion 121 by threadingly engaging with the distal portion 121.

[0036] The middle portion 122 has a protruding portion 122a protruding in a direction perpendicular to the second passage. The protruding portion 122a is an annular body having a central axis extending along the second passage. In this example, the annular body is a circular annular body. The protruding portion 122a may have rounded corners or filleted corners.

[0037] In this example, the protrusion 122a has a ferromagnetic material (for example, iron, cobalt, or nickel). For example, the protrusion 122a may have a plate-shaped ferromagnetic material only on the outer circumferential surface or in the vicinity of the outer circumferential surface. Alternatively, the entire protrusion 122a may be made of a ferromagnetic material. Alternatively, the protrusion 122a may be made of a material containing a powdered ferromagnetic material. In this example, the intermediate portion 122 corresponds to the fixed body.

[0038] The proximal portion 123 connects to the intermediate portion 122 at a proximal end of the intermediate portion 122. The proximal portion 123 is removably fixed to the intermediate portion 122 by being threadedly engaged with the intermediate portion 122. In this example, the proximal portion 123 is a Y-shaped connector (in other words, a Y connector).

[0039] The proximal portion 123 has a large diameter portion 123a. The large diameter portion 123a constitutes the proximal end of the proximal portion 123 and is cylindrical with a central axis extending along the second passage. The diameter of the large diameter portion 123a is longer than the diameter of the portion of the intermediate portion 122 other than the convex portion 122a. In this example, the large diameter portion 123a is a hemostatic valve.

[0040] The wire 13 is a thin wire. The wire 13 passes through the inside of the first passage of the tube portion 11 and the inside of the second passage of the connection portion 12.

[0041] The length of the wire 13 is longer than the sum of the length of the first passage of the tube portion 11 and the length of the second passage of the connection portion 12. In this example, the length of the wire 13 is 2.0 m. The length of the wire 13 may be selected depending on the sum of the length of the first passage and the length of the second passage, and may be, for example, 0.50 m to 3 m. The diameter of the wire 13 is slightly smaller than the diameter of the first passage. In this example, the diameter of the wire 13 is 0.2 mm to 0.5 mm. Alternatively, the diameter of the wire 13 may be 0.5 mm to 1 mm.

[0042] 1 to 6, a portion of the wire 13 that is proximal to the tubular portion 11 is shown, and a portion of the wire 13 that is distal to the tubular portion 11 is omitted. Similarly, in Figs. 7 to 17 described below, a portion of the wire 13 that is distal to the tubular portion 11 is omitted.

[0043] The fixture 20 includes a base portion 21 and a plurality of legs 22 (four legs in this example). The base portion 21 has a flat plate shape extending along a plane perpendicular to the z-axis. In this example, the base portion 21 has a rectangular shape having a short side extending in the x-axis direction and a long side extending in the y-axis direction.

[0044] In this example, the length of the long side of the base portion 21 is 520 mm. However, the length of the long side of the base portion 21 may be 300 mm to 600 mm. In this example, the length of the short side of the base portion 21 is 120 mm. The length of the short side of the base portion 21 may be 60 mm to 240 mm. The base portion 21 may have a shape other than a rectangle (for example, a trapezoid, a triangle, a semi-ellipse, or a rectangle with rounded corners).

[0045] The base portion 21 has a first recess 21a, a scale portion 21b, and a second recess 21c. The first recess 21a forms a bottomed hole in the end face in the positive direction of the z-axis of the base portion 21. When the connection portion 12 is fixed to the fixture 20, the first recess 21a is located vertically below the connection portion proximal end portion (in this example, the large diameter portion 123a), which is the proximal end portion of the connection portion 12.

[0046] In this example, the first recess 21a extends over an area including the large diameter portion 123a when the catheter system 1 is viewed in the negative direction of the z axis with the connecting portion 12 fixed to the fixture 20. In other words, the first recess 21a extends in the y axis direction from a position further in the negative direction of the y axis than the large diameter portion 123a to a position further in the positive direction of the y axis than the large diameter portion 123a, and in the x axis direction from a position further in the negative direction of the x axis than the large diameter portion 123a to a position further in the positive direction of the x axis than the large diameter portion 123a.

[0047] In this example, the length of the first recess 21a in the y-axis direction is 40 mm. However, the length of the first recess 21a in the y-axis direction may be 20 mm to 60 mm.

[0048] The first recess 21a has a shape such that, when a liquid is introduced into the first recess 21a, at least a part of the liquid is discharged from the first recess 21a. For example, the first recess 21a may have a shape such that, when a liquid is introduced into the first recess 21a, the liquid is not stored in the first recess 21a.

[0049] In this example, the first recess 21a extends in the x-axis direction from an end face of the base part 21 in the negative direction of the x-axis to an end face of the base part 21 in the positive direction of the x-axis. In this example, the bottom surface of the hole formed by the first recess 21a is a horizontal plane.

[0050] The bottom surface of the hole formed by the first recess 21a may be inclined with respect to the horizontal plane. For example, the bottom surface of the hole formed by the first recess 21a may be inclined with respect to the horizontal plane so that one of both ends in the x-axis direction is higher than the other. Also, the bottom surface of the hole formed by the first recess 21a may be inclined with respect to the horizontal plane so that the center in the x-axis direction is higher than both ends in the x-axis direction. Furthermore, the first recess 21a may have a hole penetrating the base portion 21 in the z-axis direction at the bottom surface of the hole formed by the first recess 21a.

[0051] The scale portion 21b has a plurality of scale lines on an end face of the base portion 21 in the positive direction of the z axis. The scale portion 21b extends in the y axis direction from an end of the base portion 21 in the negative direction of the y axis to a position further in the negative direction of the y axis than the first recess 21a. In this example, the scale portion 21b is located in the center of the base portion 21 in the x axis direction. Note that the scale portion 21b may be located at an end portion of the base portion 21 in the x axis direction.

[0052] Each scale line is a straight line extending along the x-axis direction and having a predetermined length. The multiple scale lines have a predetermined first unit distance between adjacent scale lines in the y-axis direction. In other words, the multiple scale lines are equally spaced in the y-axis direction. In this example, the first unit distance is 1 mm. The first unit distance may be 0.5 mm, 2 mm, etc. Also, the multiple scale lines may have a length longer than the other scale lines for each second unit distance longer than the first unit distance in the y-axis direction. For example, the second unit distance is 5 mm or 10 mm.

[0053] In this example, the scale line located at the end in the negative y-axis direction of the plurality of scale lines is located on the end side in the negative y-axis direction of the base portion 21. In this example, the scale line located at the end in the negative y-axis direction of the plurality of scale lines has a position spaced apart from the fixed position in the y-axis direction by a separation distance. In this example, the y-axis direction corresponds to the extension direction.

[0054] In addition to the scale lines, the scale portion 21b may have numbers indicating distances in the y-axis direction. In addition to the scale lines, or instead of the scale lines, the scale portion 21b may have figures such as arrows, triangles, or diamonds. In this case, the figures also correspond to marks.

[0055] The fixed position is a position where the connection portion 12 is fixed to the fixture 20. In this example, the fixed position is the position of the second recess 21c. The separation distance is the length obtained by subtracting the sum of the target length, which is a target value for the distal wire protrusion length, and the lengths of the first and second passages from the distal end of the tubular portion to the fixed position, from the entire length of the wire 13 (in other words, the entire length) when the connection portion 12 is fixed to the fixture 20. The distal end of the tubular portion is the distal end of the tubular portion 11. The distal wire protrusion length is the length of the wire 13 from the distal end of the tubular portion to the distal end of the wire 13, which is the distal end of the wire 13. In this example, the target length is 5 mm, but the target length may be a length between 0 mm and 60 mm.

[0056] In this example, of the multiple scale lines, the scale line located at the end in the negative y-axis direction corresponds to the mark. In this example, the end side of base portion 21 in the negative y-axis direction corresponds to an edge extending in the x-axis direction perpendicular to the y-axis direction. In this example, the end side of base portion 21 in the negative y-axis direction (in other words, the edge) also constitutes the mark. Note that in this example, since the end side of base portion 21 in the negative y-axis direction constitutes the mark, base portion 21 does not need to have scale portion 21b.

[0057] Incidentally, which of the multiple graduation lines is the one having a position separated by the separation distance from the fixed position in the y-axis direction may vary depending on the target length, the lengths of the first and second passages from the distal end of the tube portion to the fixed position, and the overall length of the wire 13. Therefore, of the multiple graduation lines, the graduation line having a position separated by the separation distance from the fixed position in the y-axis direction may correspond to the mark. Note that the graduation portion 21b may only have a graduation line having a position separated by the separation distance from the fixed position in the y-axis direction.

[0058] The second recess 21c forms a bottomed hole in the end face of the base portion 21 in the positive direction of the z-axis. The hole formed by the second recess 21c has a shape into which a part of the protrusion 122a is removably fitted so that the second passage of the connection portion 12 extends in the y-axis direction when the connection portion 12 is fixed to the fixture 20. In this example, the part of the protrusion 122a that fits into the hole formed by the second recess 21c is the end of the protrusion 122a in the vertically downward direction.

[0059] In this example, the second recess 21c is located at the center of the base portion 21 in the x-axis direction, and is located further in the positive y-axis direction than the first recess 21a.

[0060] In this example, the second recess 21c has a magnet 21c1. In this example, the magnet 21c1 is located at or near the bottom surface of the hole formed by the second recess 21c. In this example, the magnet 21c1 is located at the center of the bottom surface of the hole formed by the second recess 21c.

[0061] With this configuration, a portion of the protrusion 122a fits into the second recess 21c so that the second passage of the connection portion 12 extends in the y-axis direction. At this time, a force that attracts the protrusion 122a from the magnet 21c1 in the second recess 21c acts due to the magnetic force of the magnet 21c1. This makes it easier for the portion of the protrusion 122a to fit into the second recess 21c, and makes it less likely for the portion of the protrusion 122a to accidentally come off the second recess 21c. In this manner, the connection portion 12 is removably secured to the fastener 20 in a fixed position such that the second passage of the connection portion 12 extends in the y-axis direction.

[0062] In this example, the second recess 21c has a magnet 21c1, and the protrusion 122a has a ferromagnetic material. Alternatively, the second recess 21c may have a ferromagnetic material, and the protrusion 122a may have a magnet.

[0063] The multiple legs 22 protrude in the negative direction of the z axis from an end face of the base portion 21 in the negative direction of the z axis. In this example, each leg 22 is in the shape of a truncated cone having a central axis extending in the z axis direction. Note that each leg 22 may have a shape other than a truncated cone (for example, a cylindrical shape, a hemispherical shape, or a polygonal prism shape). In this example, the position of each leg 22 relative to the base portion 21 in the z axis direction is adjustable. Note that the position of each leg 22 relative to the base portion 21 in the z axis direction may not be adjustable.

[0064] The multiple legs 22 are located at the four corners of the base portion 21. The number of legs 22 included in the fixing device 20 may be three. In this case, the multiple legs 22 may be located near both ends of the end side of the base portion 21 in the negative direction of the y axis and near the midpoint of the end side in the positive direction of the y axis. In this example, the anchor 20 and intermediate section 122 correspond to a catheter anchoring system.

[0065] (Example of use) Next, an example of how the catheter system 1 is used will be described. First, the user fits a part of the protrusion 122a into the second recess 21c, whereby the connection portion 12 is removably fixed to the fixture 20 at the fixed position such that the second passage of the connection portion 12 extends in the y-axis direction.

[0066] Next, the user aligns the position of the proximal end of the wire 13 with the position of the marks (in this example, the scale line located at the end in the negative y-axis direction of the multiple scale lines and the end side of the base portion 21 in the negative y-axis direction). Next, the user checks that the distal wire protrusion length matches the target length.

[0067] Thereafter, the user removes the connection portion 12 from the fixing device 20 so that the convex portion 122a is separated from the second concave portion 21c. Next, the user operates the connection portion 12 and the wire 13 to alternately advance the tip of the wire 13 and the tip of the tube portion 11 within the blood vessel of the living body. Note that the user may operate the connection portion 12 and the wire 13 without removing the connection portion 12 from the fixing device 20.

[0068] Thereafter, when the user checks the difference between the distal wire protrusion length and the target length, he or she fits a part of the protrusion 122a into the second recess 21c, whereby the connection portion 12 is removably fixed to the fixture 20 at the fixed position such that the second passage of the connection portion 12 extends in the y-axis direction.

[0069] Next, the user checks the distance in the y-axis direction between the position of the proximal end of the wire and the position of the mark. This allows the user to check the difference between the distal wire extension length and the target length. If the user wants to match the distal wire extension length to the target length, the user operates the connection portion 12 and the wire 13 to match the position of the proximal end of the wire to the position of the mark.

[0070] As described above, the catheter system 1 of the first embodiment includes the catheter device 10 and the fixture 20. The catheter device 10 comprises a tubular portion 11 having a first passage, a connecting portion 12 having a second passage that communicates with the first passage at the proximal end, which is the proximal end of the tubular portion 11, and extends along a straight line, and a wire 13 that passes through the inside of the first passage and the second passage.

[0071] The fastener 20 has the connecting portion 12 removably fixed at a fixed position such that the second passage extends in the extension direction, and has a mark at a position spaced a distance from the fixed position in the extension direction.

[0072] The separation distance is the total length of wire 13 minus the sum of the target length, which is the target value of the distal wire protrusion length, which is the length of wire 13 from the distal end of tube portion 11 to the distal end of wire 13 when connection portion 12 is fixed to fixing device 20, and the lengths of the first and second passages from the distal end of tube portion to the fixed position.

[0073] According to this, by fixing the connection portion 12 to the fixing device 20 and matching the position of the proximal end of the wire, which is the proximal end of the wire 13, with the position of the mark in the extension direction, the distal wire protrusion length can be matched to the target length with high accuracy.

[0074] Furthermore, in the catheter system 1 of the first embodiment, the fixing device 20 has a first recess 21a vertically below the proximal end of the connection portion, which is the proximal end of the connection portion 12, when the connection portion 12 is fixed to the fixing device 20.

[0075] However, the proximal end of the connection part may be operated by the user's hand, and therefore, when the proximal end of the connection part is operated while the connection part is fixed to the fixture, there is a risk that the fixture may prevent the user from operating the proximal end of the connection part by the user's hand.

[0076] In contrast, according to the catheter system 1, the fixture 20 has a first recess 21a vertically below the proximal end of the connection part when the connection part 12 is fixed to the fixture 20. This makes it possible to prevent the fixture 20 from interfering with the operation of the proximal end of the connection part by the user's hand when the proximal end of the connection part is operated with the connection part 12 fixed to the fixture 20.

[0077] Fixture 20 does not have to have first recess 21a. In this case, for example, the diameter of intermediate portion 122 may be longer than the diameter of large diameter portion 123a so that a sufficient gap is formed between the proximal end of connection portion 12 and base portion 21 when connection portion 12 is fixed to fixture 20.

[0078] Furthermore, in the catheter system 1 of the first embodiment, the first recess 21a has a shape that allows at least a part of the liquid to be discharged when the liquid is introduced into the first recess 21a.

[0079] However, liquid may leak from the proximal end of the connection part, and in this case, there is a risk that the liquid may be accumulated in the first recess 21a. In contrast, the catheter system 1 can prevent liquid from being accumulated in the first recess 21a.

[0080] Furthermore, for example, when the total amount of leaking liquid is small compared to the volume of the first recess 21a, the first recess 21a may have a shape that allows the liquid to be stored when the liquid is introduced into the first recess 21a.

[0081] Furthermore, in the catheter system 1 of the first embodiment, the connection part 12 has a protrusion 122a that protrudes in a direction perpendicular to the second passage. The fixture 20 has a second recess 21c into which at least a part of the protrusion 122a fits.

[0082] This allows the position at which connection portion 12 is fixed to fixture 20 to be set accurately at a predetermined position.

[0083] Furthermore, in the catheter system 1 of the first embodiment, the convex portion 122a has one of a ferromagnetic material and a magnet (in this example, a ferromagnetic material), and the second concave portion 21c has the other of a ferromagnetic material and a magnet (in this example, a magnet 21c1).

[0084] This makes it possible to easily fix the connection portion 12 to the fixing device 20, and also prevents the connection portion 12 from being accidentally detached from the fixing device 20. In addition, the connection portion 12 can be easily removed from the fixing device 20.

[0085] The protrusion 122a and the second recess 21c do not necessarily have to include a ferromagnetic material and a magnet.

[0086] Furthermore, in the catheter system 1 of the first embodiment, the connection section 12 includes a distal section 121 adjacent to the tube section 11, an intermediate section 122 adjacent to the distal section 121, and a proximal section 123 adjacent to the intermediate section 122. The distal section 121, the intermediate section 122, and the proximal section 123 each have a passage that constitutes the second passage. The intermediate section 122 includes a convex section 122a, and is removably fixed to the distal section 121 by being screwed into the distal section 121, and is removably fixed to the proximal section 123 by being screwed into the proximal section 123.

[0087] Incidentally, the connection part is often composed of multiple parts that are removably fixed by screwing together. Therefore, according to the catheter system 1, the configuration of the connection part 12 can be easily changed between a configuration without the intermediate part 122 and a configuration with the intermediate part 122.

[0088] The connecting portion 12 may not include the intermediate portion 122. In this case, the connecting portion 12 is removably fixed to the distal portion 121 by screwing the proximal portion 123 into the distal portion 121, and the distal portion 121 or the proximal portion 123 may have the convex portion 122a. Furthermore, the distal portion 121 may be configured by a plurality of parts. In this case, the plurality of parts may be removably fixed to each other by screwing them together. Furthermore, the proximal portion 123 may be configured by a plurality of parts. In this case, the plurality of parts may be removably fixed to each other by screwing them together.

[0089] Furthermore, in the catheter system 1 of the first embodiment, the protruding portion 122a is an annular body having a central axis extending along the second passage. A part of the protruding portion 122a fits into the second recess 21c when the connection portion 12 is fixed to the fixture 20.

[0090] Incidentally, the connection part may be operated so as to rotate about a rotation axis extending along the second passage. In this case, if the connection part can be fixed to the fixture only when the connection part is rotated to a specific position, it may be difficult to fix the connection part to the fixture.

[0091] In contrast, according to the catheter system 1, the convex portion 122a of the connection portion 12 is annular. Therefore, regardless of the rotational position of the base portion 21, the connection portion 12 can be fixed to the fixture 20 by fitting the convex portion 122a into the second recess portion 21c. As a result, the connection portion 12 can be easily fixed to the fixture 20. The protrusion 122a may be a ring-shaped body with a portion thereof missing. Also, the protrusion 122a does not have to be a ring-shaped body.

[0092] Furthermore, in the catheter system 1 of the first embodiment, the fixture 20 has an edge that constitutes a mark and extends in a direction perpendicular to the extension direction.

[0093] This allows the user to easily confirm the position of the proximal end of the wire and the position of the mark by touching the edge of the fixture 20 and the proximal end of the wire. It is not necessary for the edge of the fixture 20 to form the mark. In this case, any one of the multiple scale lines of the scale portion 21b may form the mark. Furthermore, fastener 20 does not necessarily have to have an edge extending in a direction perpendicular to the extending direction. In this case, any one of the multiple scale lines of scale portion 21b may constitute a mark.

[0094] <First Modification of First Embodiment> Next, a catheter system according to a first modified example of the first embodiment will be described. The catheter system according to the first modified example of the first embodiment differs from the catheter system according to the first embodiment mainly in that the connection section does not include an intermediate section. The following mainly describes the differences. In the description of the first modified example of the first embodiment, the same reference numerals as those used in the first embodiment denote the same or substantially similar components.

[0095] (composition) As shown in Figs. 7 to 10, a catheter system 1A according to a first modified example of the first embodiment includes a catheter device 10A and a fixture 20A.

[0096] Fig. 7 is a plan view of the catheter system 1A. Fig. 8 is a view showing a part of a cross section of the catheter system 1A cut along a plane represented by line VIII-VIII in Fig. 7, viewed in the positive direction of the y-axis. Fig. 9 is a right rear upper perspective view of the catheter system 1A in a state in which the catheter device 10A is separated from the fixture 20A. Fig. 10 is a right rear lower perspective view of the catheter system 1A in a state in which the catheter device 10A is separated from the fixture 20A.

[0097] The catheter device 10A differs from the catheter device 10 of the first embodiment in that the catheter device 10A includes a connection part 12A instead of the connection part 12. The connection portion 12A includes a distal portion 121 adjacent to the tube portion 11, a proximal portion 123 adjacent to the distal portion 121, and an outer periphery portion 124A surrounding the outer periphery of the proximal portion 123.

[0098] Each of the distal portion 121 and the proximal portion 123 has a passage therein that constitutes the second passage. The distal portion 121 is connected to the tube portion 11 at the proximal end of the tube portion 11. In this example, the distal portion 121 is integrally formed with the tube portion 11. The distal portion 121 may be referred to as a hub.

[0099] The proximal portion 123 connects to the distal portion 121 at a proximal end of the distal portion 121. The proximal portion 123 is removably fixed to the distal portion 121 by being screwed to the distal portion 121. In this example, the proximal portion 123 is a Y-shaped connector (in other words, a Y connector).

[0100] The proximal portion 123 has a large diameter portion 123a and a small diameter portion 123b. The large diameter portion 123a constitutes the proximal end of the proximal portion 123 and has a cylindrical shape with a central axis extending along the second passage. In this example, the large diameter portion 123a is a hemostatic valve. The small diameter portion 123b constitutes the distal end of the proximal portion 123 and is cylindrical with a central axis extending along the second passage. The diameter of the small diameter portion 123b is smaller than the diameter of the large diameter portion 123a. In this example, the distal portion 121 and the proximal portion 123 correspond to a body portion.

[0101] The outer peripheral portion 124A surrounds the outer periphery of the small diameter portion 123b so that the small diameter portion 123b can rotate around a rotation axis extending along the second passage. In this example, the cross section of the outer peripheral portion 124A taken along a plane perpendicular to the second passage is C-shaped, and the outer peripheral portion 124A has a predetermined thickness in the direction along the second passage.

[0102] In this example, the outer circumferential portion 124A is made of an elastic body (for example, rubber, resin, or metal, etc.) The outer circumferential portion 124A is removably attached to the small diameter portion 123b by elastic deformation.

[0103] The outer peripheral portion 124A has a protruding portion 124aA that protrudes in a direction perpendicular to the second passage. In this example, the protruding portion 124aA protrudes vertically downward. In this example, a cross section of the protruding portion 124aA cut by a horizontal plane is a rectangle having a short side extending in the y-axis direction and a long side extending in the x-axis direction. The protruding portion 124aA may have rounded corners or a filleted surface.

[0104] In this example, the protrusion 124aA has a ferromagnetic material (for example, iron or nickel). For example, the protrusion 124aA may have a plate-shaped ferromagnetic material only on the outer wall surface or in the vicinity of the outer wall surface. Alternatively, the entire protrusion 124aA may be made of a ferromagnetic material. Alternatively, the protrusion 124aA may be made of a material containing a powdered ferromagnetic material. In this example, the outer periphery 124A corresponds to the object to be fixed.

[0105] In addition, outer circumferential portion 124A may have a member that engages with proximal portion 123 so as to prohibit outer circumferential portion 124A from moving relative to small diameter portion 123b in the direction along the second passage. For example, outer circumferential portion 124A and small diameter portion 123b may have a protrusion extending along a plane perpendicular to the second passage and a groove into which the protrusion fits, on the surface where outer circumferential portion 124A and small diameter portion 123b contact each other. Additionally, outer circumferential portion 124A may be configured so that proximal portion 123 is non-rotatable.

[0106] Fixture 20A differs from fixture 20 of the first embodiment in that fixture 20A includes base portion 21A instead of base portion 21. The base portion 21A differs from the base portion 21 of the first embodiment in that it includes a second recess 21cA instead of the second recess 21c.

[0107] The second recess 21cA forms a bottomed hole on the end face of the base portion 21A in the positive direction of the z axis. The hole formed by the second recess 21cA has a shape into which the protrusion 124aA can be removably fitted so that the second passage of the connection portion 12A extends in the y axis direction when the connection portion 12A is fixed to the fixture 20A.

[0108] In this example, the second recess 21cA is located at the center of the base portion 21A in the x-axis direction, and is located further in the positive y-axis direction than the first recess 21a.

[0109] In this example, the second recess 21cA has a magnet 21c1A. In this example, the magnet 21c1A is located at or near the bottom surface of the hole formed by the second recess 21cA. In this example, the magnet 21c1A extends over the entire bottom surface of the hole formed by the second recess 21cA.

[0110] With this configuration, the protrusion 124aA fits into the second recess 21cA so that the second passage of the connection portion 12A extends in the y-axis direction. At this time, a force that attracts the protrusion 124aA from the magnet 21c1A works due to the magnetic force of the magnet 21c1A in the second recess 21cA. This makes it easier for the protrusion 124aA to fit into the second recess 21cA and makes it less likely for the protrusion 124aA to accidentally come off the second recess 21cA.

[0111] In this manner, the connecting portion 12A is removably secured to the fastener 20A at a fixed position such that the second passage of the connecting portion 12A extends in the y-axis direction. In this example, anchor 20A and outer periphery 124A correspond to a catheter anchoring system.

[0112] As described above, according to the catheter system 1A of the first modified example of the first embodiment, the same actions and effects as those of the catheter system 1 of the first embodiment are achieved. Furthermore, in the catheter system 1A of the first modified example of the first embodiment, the connection portion 12A includes a main body portion (in this example, a distal portion 121 and a proximal portion 123) having a second passage, and an outer circumferential portion 124A having a convex portion 124aA and surrounding the outer periphery of the main body portion so that the main body portion can rotate around a rotation axis extending along the second passage.

[0113] Incidentally, the connection part may be operated so as to rotate about a rotation axis extending along the second passage. In this case, if the connection part can be fixed to the fixture only when the connection part is rotated to a specific position, it may be difficult to fix the connection part to the fixture.

[0114] In contrast, according to the catheter system 1A, the main body of the connection part 12A is rotatable with respect to the outer circumferential part 124A having the convex part 124aA. Therefore, regardless of the rotational position of the main body, the outer circumferential part 124A can be fixed to the fixing device 20A. As a result, the connection part 12A can be easily fixed to the fixing device 20A.

[0115] <Second embodiment> Next, a catheter system according to a second embodiment will be described. The catheter system according to the second embodiment differs from the catheter system according to the first embodiment mainly in that the fixing device is configured to be able to change the position of the mark. The following mainly describes the differences. In the description of the second embodiment, the same reference numerals as those used in the first embodiment denote the same or substantially similar parts.

[0116] (composition) As shown in FIGS. 11 to 16, a catheter system 1B of the second embodiment differs from the catheter system 1 of the first embodiment in that a fixture 20B is provided instead of the fixture 20.

[0117] Fig. 11 is a right rear upper perspective view of the catheter system 1B. Fig. 12 is a plan view of the catheter system 1B. Fig. 13 is a right side view of the catheter system 1B. Fig. 14 is a right rear upper perspective view of the catheter system 1B in a state in which the catheter device 10 is separated from the fixture 20B. Fig. 15 is a right rear lower perspective view of the catheter system 1B in a state in which the catheter device 10 is separated from the fixture 20B. Fig. 16 is a right rear upper perspective view of the catheter system 1B in a contracted state of the fixture 20B.

[0118] Fixture 20B includes a fixing portion 23B, a mark portion 24B, a pair of bolts 25B, a pair of nuts 26B, and a plurality of (four in this example) legs 27B. The fixed portion 23B is a flat plate extending along a plane perpendicular to the z-axis. In this example, the fixed portion 23B is a rectangle having a short side extending in the x-axis direction and a long side extending in the y-axis direction.

[0119] In this example, the length of the long side of the fixed portion 23B is 300 mm. However, the length of the long side of the fixed portion 23B may be 100 mm to 500 mm. In this example, the length of the short side of the fixed portion 23B is 120 mm. The length of the short side of the fixed portion 23B may be 60 mm to 240 mm. The fixing portion 23B may have a shape other than a rectangle (for example, a trapezoid, a triangle, a semi-ellipse, or a rectangle with rounded corners).

[0120] The fixed portion 23B has a first recess 23aB, a notch 23bB, a downward protrusion 23cB, and a second recess 23dB. The first recess 23aB has a similar configuration to the first recess 21a of the first embodiment.

[0121] The cutout portion 23bB forms a cutout at an end of the fixed portion 23B in the negative direction of the y axis. The cutout portion 23bB is located at the center of the fixed portion 23B in the x axis direction. In this example, the cutout formed by the cutout portion 23bB is a square having end sides extending in the x axis direction and the y axis direction when the fixed portion 23B is viewed in the negative direction of the z axis.

[0122] In this example, the length of the edge of the notch formed by the cutout portion 23bB is 40 mm. The length of the edge of the notch formed by the cutout portion 23bB may be 20 mm to 60 mm. Furthermore, the cutout formed by the cutout portion 23bB may be rectangular.

[0123] The downward protrusion 23cB protrudes in the negative direction of the z axis from an end face of the fixed portion 23B in the negative direction of the z axis. In other words, the downward protrusion 23cB is a portion of the fixed portion 23B that is longer in length in the z axis direction (in other words, thicker) than the portions of the fixed portion 23B other than the downward protrusion 23cB.

[0124] When the fixed portion 23B is viewed in the positive direction of the z-axis, the downward protrusion 23cB has a rectangular shape having a long side that coincides with the short side of the fixed portion 23B and a short side that extends in the y-axis direction. The downward protrusion 23cB is located at the end of the fixed portion 23B in the positive direction of the y-axis and extends over the entire fixed portion 23B in the x-axis direction.

[0125] The second recess 23dB has a configuration similar to that of the second recess 21c of the first embodiment. Therefore, in this example, the second recess 23dB has a magnet (not shown). Note that the second recess 23dB does not necessarily have to have a magnet.

[0126] The mark portion 24B is a flat plate extending along a plane perpendicular to the z-axis. In this example, the mark portion 24B is a rectangle having a short side extending in the x-axis direction and a long side extending in the y-axis direction.

[0127] In this example, the length of the long side of the mark portion 24B is 260 mm. However, the length of the long side of the mark portion 24B may be 150 mm to 400 mm. In this example, the length of the short side of the mark portion 24B is equal to the length of the short side of the fixed portion 23B. Note that the length of the short side of the mark portion 24B may be different from the length of the short side of the fixed portion 23B. The mark portion 24B may have a shape other than a rectangle (for example, a trapezoid, a triangle, a semi-ellipse, or a rectangle with rounded corners).

[0128] The mark portion 24B has a pair of guide holes 24aB, an upward protrusion 24bB, and a scale portion 24cB.

[0129] Each guide hole 24aB is a linear elongated hole extending in the y-axis direction. Each guide hole 24aB penetrates the mark portion 24B in the z-axis direction. A pair of guide holes 24aB are spaced apart from each other in the x-axis direction. In other words, the pair of guide holes 24aB are parallel to each other. In this example, the pair of guide holes 24aB are located at both ends of the mark portion 24B in the x-axis direction.

[0130] The bolt 25B and the nut 26B are fastened to each other through the guide hole 24aB so as to sandwich the fixed portion 23B and the mark portion 24B in the z-axis direction. With this configuration, when the bolt 25B and the nut 26B are fastened to each other, the mark portion 24B cannot move relative to the fixed portion 23B. Furthermore, when the bolt 25B and the nut 26B are loosened, the mark portion 24B can move relative to the fixed portion 23B in the direction in which the guide hole 24aB extends (in this example, the y-axis direction). Therefore, the mark portion 24B is fixed to the fixed portion 23B so that its position in the extension direction (in this example, the y-axis direction) can be changed.

[0131] 11 to 15 show a state in which the mark portion 24B is located at the most negative position on the y axis relative to the fixed portion 23B (in other words, the scale portion 24cB is farthest from the fixed position) (in other words, the extended state). Fig. 16 shows a state in which the mark portion 24B is located at the most positive position on the y axis relative to the fixed portion 23B (in other words, the scale portion 24cB is closest to the fixed position) (in other words, the contracted state).

[0132] The upward protrusion 24bB protrudes in the positive direction of the z axis from an end face of the mark portion 24B in the positive direction of the z axis. In other words, the upward protrusion 24bB is a portion of the mark portion 24B that is longer in length in the z axis direction (in other words, thicker) than the portions of the mark portion 24B other than the upward protrusion 24bB.

[0133] The upward protrusion 24bB is located at the end of the mark portion 24B in the negative direction of the y axis and at the center of the mark portion 24B in the x axis direction. In this example, the upward protrusion 24bB has a shape that matches the notch formed by the notch portion 23bB. Therefore, in this example, the upward protrusion 24bB is a square having sides that extend in the x axis direction and the y axis direction, when the mark portion 24B is viewed in the negative direction of the z axis.

[0134] The scale portion 24cB has a plurality of scale lines on an end surface of the upward protrusion 24bB in the positive direction of the z-axis. The scale portion 24cB extends over the entire upward protrusion 24bB in the y-axis direction. In this example, the scale portion 24cB is located in the center of the upward protrusion 24bB in the x-axis direction. The scale portion 24cB may be located at an end of the upward protrusion 24bB in the x-axis direction.

[0135] Each scale line is a straight line extending along the x-axis direction and having a predetermined length. The interval between adjacent scale lines in the y-axis direction is a predetermined third unit distance. In other words, the scale lines are equally spaced in the y-axis direction. In this example, the third unit distance is 1 mm. The third unit distance may be 0.5 mm, 2 mm, or the like. In addition, the length of the scale lines in the y-axis direction may be longer than the other scale lines for each fourth unit distance that is longer than the third unit distance. For example, the fourth unit distance is 5 mm or 10 mm.

[0136] In this example, the scale line located at the end in the negative y-axis direction of the plurality of scale lines is located on the end side of the upward protrusion 24bB in the negative y-axis direction. In this example, the scale line located at the end in the negative y-axis direction of the plurality of scale lines is located at a distance from the fixed position in the y-axis direction. In this example, the y-axis direction corresponds to the extension direction.

[0137] The scale portion 24cB may have numbers indicating distances in the y-axis direction in addition to the scale lines. The scale portion 24cB may have figures such as arrows, triangles, or diamonds in addition to or instead of the scale lines. In this case, the figures also correspond to marks.

[0138] The fixed position is a position where the connection portion 12 is fixed to the fixed portion 23B. In this example, the fixed position is the position of the second recess 23dB. The separation distance is the sum of the target length, which is the target value of the distal wire protrusion length, and the lengths of the first and second passages from the distal end of the tube portion to the fixed position when the connection portion 12 is fixed to the fixed portion 23B, subtracted from the entire length of the wire 13 (in other words, the entire length). The distal end of the tube portion is the distal end of the tube portion 11. The distal wire protrusion length is the length of the wire 13 from the distal end of the tube portion to the distal end of the wire 13, which is the distal end of the wire 13. In this example, the target length is 5 mm, but the target length may be a length between 0 mm and 60 mm.

[0139] In this example, the scale line located at the end in the negative direction of the y-axis of the multiple scale lines corresponds to the mark. In this example, the end side of the mark portion 24B in the negative direction of the y-axis corresponds to an edge extending in the x-axis direction perpendicular to the y-axis direction. In this example, the end side (in other words, the edge) of the mark portion 24B in the negative direction of the y-axis also constitutes a mark. Note that in this example, since the end side of the mark portion 24B in the negative direction of the y-axis constitutes a mark, the mark portion 24B does not need to have the scale portion 24cB.

[0140] Incidentally, which of the multiple graduation lines is the graduation line having a position separated by the separation distance from the fixed position in the y-axis direction can vary depending on the target length, the lengths of the first and second passages from the distal end of the tube portion to the fixed position, and the overall length of the wire 13. Therefore, of the multiple graduation lines, the graduation line having a position separated by the separation distance from the fixed position in the y-axis direction may correspond to the mark.

[0141] One pair of legs 27B of the multiple legs 27B protrude in the negative direction of the z axis from an end face of fixed portion 23B facing the negative direction of the z axis. Another pair of legs 27B of the multiple legs 27B protrude in the negative direction of the z axis from an end face of mark portion 24B facing the negative direction of the z axis.

[0142] In this example, each leg 27B is in the shape of a truncated cone having a central axis extending in the z-axis direction. Note that each leg 27B may have a shape other than a truncated cone (for example, a hemisphere, a cylinder, a polygonal column, etc.). In this example, the position of each leg 27B is adjustable in the z-axis direction relative to the fixed part 23B or the mark part 24B. Note that the position of each leg 27B may not be adjustable in the z-axis direction relative to the fixed part 23B or the mark part 24B.

[0143] Of the multiple legs 27B, a pair of legs 27B located on fixed portion 23B are located near both ends of an end side of fixed portion 23B in the positive direction of the y axis. Of the multiple legs 27B, a pair of legs 27B located on mark portion 24B are located near both ends of an end side of mark portion 24B in the negative direction of the y axis.

[0144] The number of legs 27B included in fixing device 20B may be 3. In this case, the multiple legs 27B may be located near both ends of the end side of mark portion 24B in the negative direction of the y axis and near the midpoint of the end side of fixing portion 23B in the positive direction of the y axis. In this example, the anchor 20B and intermediate section 122 correspond to a catheter anchoring system.

[0145] (Example of use) Next, an example of use of the catheter system 1B will be described. First, the user fits a part of the protrusion 122a into the second recess 23dB, whereby the connection portion 12 is removably fixed to the fixture 20B at the fixed position such that the second passage of the connection portion 12 extends in the y-axis direction.

[0146] Next, the user confirms that the distal wire protrusion length matches the target length. Next, the user loosens the fastening of bolt 25B and nut 26B. This allows mark portion 24B to move relative to fixed portion 23B.

[0147] Next, the user adjusts the position of the marked portion 24B relative to the fixed portion 23B by moving the marked portion 24B in the y-axis direction relative to the fixed portion 23B so that the position of the proximal end of the wire coincides with the position of the marks (in this example, the scale line located at the end in the negative y-axis direction of the multiple scale lines and the end side of the upward protrusion 24bB in the negative y-axis direction). Next, the user tightens the bolt 25B and the nut 26B. This makes the marked portion 24B immovable relative to the fixed portion 23B.

[0148] Thereafter, the user removes connecting portion 12 from fixing device 20B so that convex portion 122a is separated from second concave portion 23dB. Next, the user manipulates connecting portion 12 and wire 13 to alternately advance the tip of wire 13 and the tip of tube portion 11 within the blood vessel of the living body. Note that the user may manipulate connecting portion 12 and wire 13 without removing connecting portion 12 from fixing device 20B.

[0149] Thereafter, when the user checks the difference between the distal wire protrusion length and the target length, he or she fits a part of the protrusion 122a into the second recess 23dB, whereby the connection portion 12 is removably fixed to the fixture 20B at the fixed position such that the second passage of the connection portion 12 extends in the y-axis direction.

[0150] Next, the user checks the distance in the y-axis direction between the position of the proximal end of the wire and the position of the mark. This allows the user to check the difference between the distal wire extension length and the target length. If the user wants to match the distal wire extension length to the target length, the user operates the connection portion 12 and the wire 13 to match the position of the proximal end of the wire to the position of the mark.

[0151] As described above, according to the catheter system 1B of the second embodiment, the same actions and effects as those of the catheter system 1 of the first embodiment are achieved. Furthermore, in the catheter system 1B of the second embodiment, the fixing tool 20B includes a fixing portion 23B and a mark portion 24B.

[0152] The fixing portion 23B is removably fixed to the connecting portion 12 at a fixed position such that the second passage extends in the extension direction. The mark portion 24B has a mark, and is fixed to the fixing portion 23B so that the position in the extension direction is changeable.

[0153] However, a connection part is often formed by connecting a plurality of parts selected from a plurality of parts each having a plurality of functions. For this reason, there are many different total lengths of the connection part. In addition, there are also many different total lengths of the wire.

[0154] Therefore, it is difficult for a user to accurately recognize the overall length of the connection part and wire in use and to quickly estimate the distal wire protrusion length with high accuracy based on the proximal wire protrusion length, which is the length of the wire from the fixed position to the proximal end of the wire, and therefore there is a risk that the user will not be able to quickly confirm that the distal wire protrusion length matches the target length with high accuracy.

[0155] In contrast, according to the catheter system 1B, when the position of the proximal end of the wire coincides with the position of the mark in the extension direction with the connection portion 12 fixed to the fixed portion 23B, the position of the mark portion 24B can be changed relative to the fixed portion 23B so that the distal wire projection length coincides with the target length. This allows the user to quickly confirm that the distal wire projection length coincides with the target length with high accuracy by checking the positions of the proximal end of the wire and the mark in the extension direction.

[0156] Fixture 20B may use another slide mechanism (for example, a slide mechanism using a rail, or a slide mechanism using a ball screw, etc.) as the slide mechanism for moving mark portion 24B relative to fixed portion 23B.

[0157] <First Modification of Second Embodiment> Next, a catheter system according to a first modified example of the second embodiment will be described. The catheter system according to the first modified example of the second embodiment differs from the catheter system according to the second embodiment mainly in that it has a scale line capable of measuring the position of the mark portion relative to the fixed portion. The following mainly describes the differences. In the description of the first modified example of the second embodiment, the same reference numerals as those used in the second embodiment are used to denote the same or substantially similar items.

[0158] (composition) As shown in FIG. 17, a catheter system 1C of a first modified example of the second embodiment differs from the catheter system 1B of the second embodiment in that a fixture 20C is provided instead of the fixture 20B. FIG. 17 is a plan view of the catheter system 1C.

[0159] Fixture 20C differs from fixture 20B of the second embodiment in that fixture 20C includes mark portion 24C instead of mark portion 24B. The mark portion 24C has a scale portion 24eC in addition to the configuration of the mark portion 24B of the second embodiment.

[0160] The scale portion 24eC has multiple scale lines on an end face of the mark portion 24C in the positive direction of the z axis, except for the upward protrusion 24bB. The scale portion 24eC extends over the entire portion of the mark portion 24C, except for the upward protrusion 24bB, in the y axis direction. The scale portion 24eC is located in the center of the mark portion 24C in the x axis direction.

[0161] Each graduation line of the graduated portion 24eC is a straight line extending along the x-axis direction and having a predetermined length. The graduation lines of the graduated portion 24eC have a predetermined fifth unit distance between adjacent graduation lines in the y-axis direction. In other words, the graduation lines of the graduated portion 24eC are equally spaced in the y-axis direction. In this example, the fifth unit distance is 1 mm. The fifth unit distance may be 0.5 mm, 2 mm, or the like. In addition, the graduation lines of the graduated portion 24eC may be longer than the other graduation lines for every sixth unit distance that is longer than the fifth unit distance in the y-axis direction. For example, the sixth unit distance is 5 mm or 10 mm.

[0162] The scale portion 24eC may have numbers indicating distances in the y-axis direction in addition to the scale lines. The scale portion 24eC may have figures such as arrows, triangles, or diamonds in addition to or instead of the scale lines. For example, the scale portion 24eC may have figures such as arrows, triangles, or diamonds in addition to the scale lines at every seventh unit distance in the y-axis direction, which is longer than the fifth unit distance. For example, the seventh unit distance is 50 mm.

[0163] With this configuration, among the multiple graduation lines of the graduated portion 24eC, the graduation line coinciding with the position of the end side of the fixed portion 23B in the negative direction of the y axis changes with the change in the position of the mark portion 24C in the y axis direction relative to the fixed portion 23B. Therefore, the user can measure the position of the mark portion 24C in the y axis direction relative to the fixed portion 23B by using the graduation lines of the graduated portion 24eC.

[0164] As described above, according to the catheter system 1C of the first modified example of the second embodiment, the same actions and effects as those of the catheter system 1B of the second embodiment are achieved. Furthermore, in the catheter system 1C of the first modified example of the second embodiment, the fixing device 20C has a scale line (in this example, the scale line of the scale portion 24eC) that allows the position of the mark portion 24C in the extension direction (in this example, the y-axis direction) relative to the fixing portion 23B to be measured.

[0165] However, when the tube portion is placed in the patient's body, only the wire may be replaced. In this case, the length of the wire before replacement may differ from the length of the wire after replacement. In such a case, it may be impossible to adjust the position of the mark portion relative to the fixed portion so that the distal wire protrusion length of the replaced wire coincides with the target length.

[0166] In contrast, according to the catheter system 1C, it is possible to measure in advance the position of the marked portion 24C relative to the fixed portion 23B so that the distal wire protrusion length coincides with the target length for each of the multiple wires 13. As a result, even when only the wire 13 is replaced while the tube portion 11 is indwelled inside the patient's body, it is possible to easily adjust the position of the marked portion 24C relative to the fixed portion 23B for the replaced wire 13 so that the distal wire protrusion length coincides with the target length.

[0167] In addition, a scale line capable of measuring the position of mark portion 24C in the extension direction relative to fixed portion 23B may be provided on an end face (in other words, a side face) of mark portion 24C in the x-axis direction, or an end face (in other words, a side face) of fixed portion 23B in the x-axis direction.

[0168] The present invention is not limited to the above-described embodiment. For example, various modifications that can be understood by a person skilled in the art may be made to the above-described embodiment without departing from the spirit of the present invention. [Explanation of symbols]

[0169] 1,1A,1B,1C Catheter System 10,10A Catheter device 11 Pipe section 12,12A Connection 121 Distal 122 Middle section 122a Convex 123 Proximal 123a Large diameter section 123b Small diameter section 124A outer periphery 124aA Convex 13 Wire 20,20A,20B,20C Fixtures 21,21A Base part 21a First recess 21b Scale 21c Second recess 21c1, 21c1A Magnet 21cA Second recess 22 Legs 23B Fixed part 23aB First recess 23bB Notch 23cB downward protrusion 23dB 2nd recess 24B, 24C Mark section 24aB Guide hole 24bB Upper protrusion 24cB scale 24eC scale 25B Bolt 26B Nut 27B Legs

Claims

1. a catheter device including: a tubular portion having a first passageway; a connecting portion having a second passageway extending along a straight line and communicating with the first passageway at a proximal end of the tubular portion; and a wire passing through the first passageway and the second passageway; a fastener for removably fastening the connection portion at a fastening position such that the second passage extends in an extension direction, and the fastener has a mark at a position spaced a distance from the fastening position in the extension direction; Equipped with A catheter system in which the separation distance is a length obtained by subtracting the sum of a target length, which is a target value of a distal wire protrusion length, which is the length of the wire from the distal end of the tube portion, which is the distal end of the tube portion, to the distal end of the wire, which is the distal end of the wire, when the connection portion is fixed to the fixing device, and the length of the first passage and the second passage from the distal end of the tube portion to the fixed position, from the total length of the wire.

2. 2. The catheter system of claim 1, A catheter system, wherein the fixing device has a first recess vertically below a proximal end of the connection portion, which is the proximal end of the connection portion, when the connection portion is fixed to the fixing device.

3. 3. The catheter system of claim 2, A catheter system, wherein the first recess has a shape that allows at least a portion of a liquid to be discharged when the liquid is introduced into the first recess.

4. The catheter system according to claim 1 or 2, The connection portion has a protrusion protruding in a direction perpendicular to the second passage, A catheter system, wherein the fixing device has a second recess into which at least a portion of the protrusion fits.

5. 5. The catheter system of claim 4, the protrusion has one of a ferromagnetic material and a magnet, The second recess includes the other of the ferromagnetic material and the magnet.

6. The catheter system according to claim 4 or 5, The connection portion includes a main body portion having the second passage, and an outer periphery portion surrounding the outer periphery of the main body portion so that the main body portion is rotatable around a rotation axis extending along the second passage, and the outer periphery portion has the convex portion.

7. The catheter system according to claim 4 or 5, the connecting portion includes a distal portion adjacent to the tube portion, an intermediate portion adjacent to the distal portion, and a proximal portion adjacent to the intermediate portion; each of the distal portion, the intermediate portion, and the proximal portion has a passageway that constitutes the second passageway; A catheter system, wherein the intermediate portion includes the convex portion, and is removably fixed to the distal portion by screwing it onto the distal portion, and is removably fixed to the proximal portion by screwing it onto the proximal portion.

8. The catheter system according to claim 4 or 5, The protrusion is an annular body having a central axis extending along the second passage, A catheter system, wherein a portion of the protrusion fits into the second recess when the connection portion is fixed to the fixing device.

9. The catheter system according to claim 1 or 2, The fixing device is a fixing portion to which the connection portion is removably fixed at the fixed position such that the second passage extends in the extension direction; and a mark portion having the mark and fixed to the fixing portion so as to be changeable in position in the extension direction; A catheter system comprising:

10. 10. The catheter system of claim 9, A catheter system, wherein the fixing device has a scale line that allows the position of the mark portion relative to the fixing portion in the extension direction to be measured.

11. The catheter system according to claim 1 or 2, A catheter system, wherein the fixing device has an edge that constitutes the mark and extends in a direction perpendicular to the extension direction.

12. a catheter device including a tubular portion having a first passageway, a connecting portion having a second passageway that is in communication with the first passageway at a proximal end that is a proximal end of the tubular portion and that extends along a straight line, and a wire that passes through the insides of the first passageway and the second passageway, the catheter device including a fixed body that constitutes at least a part of the connecting portion; a fixture that removably fixes the fixed body at a fixed position such that the second passage extends in an extension direction, and that has a mark at a position spaced a distance from the fixed position in the extension direction; Equipped with A catheter fixing system in which the separation distance is the total length of the wire minus the sum of a target length, which is a target value of the distal wire protrusion length, which is the length of the wire from the distal end of the tubular portion, which is the distal end of the tubular portion, to the distal end of the wire, which is the distal end of the wire, when the fixed body is fixed to the fixing device, and the length of the first passage and the second passage from the distal end of the tubular portion to the fixing position.

13. A catheter device including a tubular portion having a first passage, a connecting portion having a second passage that communicates with the first passage at a proximal end that is a proximal end of the tubular portion and extends along a straight line, and a wire passing through inside the first passage and the second passage, the catheter device comprising: a fixed body that constitutes at least a part of the connecting portion, the fixed body is removably fixed to a fixing tool at a fixed position such that the second passage extends in an extension direction; the fixing device has a mark at a position spaced a distance from the fixing position in the extension direction, the separation distance is a length obtained by subtracting from the total length of the wire the sum of a target length, which is a target value of a distal wire protrusion length, which is the length of the wire from the distal end of the tube portion, which is the distal end of the tube portion, to the distal end of the wire, which is the distal end of the wire, and the length of the first passage and the second passage from the distal end of the tube portion to the fixing position, when the fixed body is fixed to the fixing device; the fixed body has a protrusion protruding in a direction perpendicular to the second passage, The fixing device has a recess into which at least a portion of the protrusion fits.

14. A fixture for fixing a connecting portion of a catheter device including a tubular portion having a first passage, a connecting portion having a second passage that communicates with the first passage at a proximal end that is an end on a proximal side of the tubular portion and extends along a straight line, and a wire passing through an interior of the first passage and the second passage, The connection portion is removably fixed at a fixed position such that the second passage extends in an extension direction, and has a mark at a position spaced a distance from the fixed position in the extension direction; The separation distance is the sum of a target length, which is a target value of the distal wire protrusion length, which is the length of the wire from the distal end of the tube portion, which is the distal end of the tube portion, to the distal end of the wire, which is the distal end of the wire, when the connection portion is fixed to the fixing device, and the length of the first passage and the second passage from the distal end of the tube portion to the fixed position, from the total length of the wire, the fixing device.

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