Retainer

Abstract

To provide a retainer used by being attached to an introduction aid used when a plurality of introduction members are introduced to a living body, which makes some of the plurality of introduction members movable, and makes the remainder immovable.SOLUTION: A retainer 1A is used by being attached to a penetration part of an introduction aid. The retainer 1A includes a base part 2. The base part 2 is formed with a lumen 2H extending from a second tip part 20D to a second base end part 20P for movably holding a first introduction member of the plurality of introduction members introduced to a living body, and a slit 2S provided in a part of a side face 28 facing the penetration part in the state that the retainer 1A is attached to the penetration part of the introduction aid. The slit 2S holds a second introduction member different from the first introduction member of the plurality of introduction members between the penetration part and itself, and makes it immovable.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a holder that is attached to and used with an introduction aid used when introducing an introduction member including a catheter, a guide wire, or the like into the body.

Background Art

[0002] When performing intravascular treatment using an introduction member including a catheter, a guide wire, or the like, an introduction aid for suppressing bleeding from a blood vessel is known. Patent Document 1 discloses a Y-connector having a hemostatic valve and a fixing valve. A slit is formed in the hemostatic valve. The hemostatic valve suppresses the outflow of blood from the gap between the slit and the hemostatic valve by closely adhering to the introduction member inserted through the slit. A fixing hole is formed in the fixing valve. When the user screws the cap member onto the main pipe member of the Y-connector, the fixing hole of the fixing valve expands inward. The introduction member is compressed by the fixing valve and becomes immovable in the stretching direction. Thereby, the introduction member is fixed to the Y-connector.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In some cases, intravascular treatment is performed using a plurality of introduction members. Here, when the Y-connector described in Patent Document 1 is used, all of the plurality of introduction members become immovable by the fixing valve. On the other hand, there is a demand to perform intravascular treatment using a plurality of introduction members in a state where a part of the plurality of introduction members is movable and the rest is immovable.

[0005] An object of the present invention is to provide a holder that is attached to and used with an introduction assist device used when introducing a plurality of introduction members into the body, and that makes a part of the plurality of introduction members movable and the rest immovable.

Means for Solving the Problems

[0006] The holder according to the present invention is a holder that is attached to and used from the side of the first base end portion to the through-hole of an introduction assist device having a through-hole that penetrates in a first extending direction between a first tip end portion and a first base end portion, and has a base portion that extends in a second extending direction between a second tip end portion and a second base end portion. In a state where the base portion is attached to the through-hole of the introduction assist device, the second extending direction extends along the first extending direction, and the distance between the first tip end portion and the second tip end portion is shorter than the distance between the first tip end portion and the second base end portion. The base portion has a lumen that extends from the second tip end portion toward the second base end portion along the second extending direction and holds a first introduction member among a plurality of introduction members to be introduced into the living body movably in the second extending direction, and a fixing portion provided on a part of a side surface opposite to the through-hole in a state where the holder is attached to the through-hole of the introduction assist device. The fixing portion sandwiches and immobilizes a second introduction member different from the first introduction member among the plurality of introduction members between the fixing portion and the through-hole.

[0007] According to the present invention, the holder makes the first introduction member movable in the second extending direction along the lumen, while the fixing portion holds the second introduction member immovably. Therefore, the user can perform treatment using the first introduction member and the second introduction member in a state where the first introduction member is movable and the second introduction member is immovable.

[0008] In the present invention, the base portion may have a communication portion that communicates the space inside the lumen and the space outside the side surface over the entire region of the second extending direction of the lumen. In this case, the user can attach the first introduction member to the lumen through the communication portion.

[0009] In the present invention, the base portion is elastically deformable, and the shape of the communication portion may be deformed by the elastic deformation of the base portion. In this case, the holder can facilitate the operation of the user to attach the first introduction member to the inner cavity.

[0010] In the present invention, the communication portion may be a slit extending along the second extending direction. In this case, the holder can maintain the strength of the base portion while facilitating the operation of the user to attach the first introduction member to the inner cavity.

[0011] In the present invention, the width of the slit may be smaller than the diameter of the inner cavity. In this case, the holder can suppress the detachment of the first introduction member attached to the inner cavity through the slit.

[0012] In the present invention, it may be provided on at least one of a pair of wall portions forming the slit and have a protruding portion protruding toward the inner side in the width direction of the slit. In this case, the holder can suppress the detachment of the first introduction member attached to the inner cavity through the slit by the protruding portion.

[0013] In the present invention, the fixing portion has one or a plurality of ribs extending in the circumferential direction around a virtual axis extending along the second extending direction through the center of the base portion, the one or a plurality of ribs have a rib surface on the outer side in the radial direction around the axis, and the radial distance between the rib surface and the axis may be larger than the radial distance between the side surface and the axis. In this case, the one or a plurality of ribs can stably maintain the second introduction member sandwiched between them and the through portion of the introduction assist tool in a non-movable state.

[0014] In the present invention, the distance between the axis and the rib surface may gradually increase from the side of the second tip portion toward the side of the second base portion. In this case, the holder can enhance the movement restraining effect on the second introduction member by the one or a plurality of ribs.

[0015] In the present invention, the fixing portion has a plurality of ribs, and the plurality of ribs may be arranged along the second extending direction. In this case, the holder can enhance the movement restraining effect of the second introducing member by the plurality of ribs.

[0016] In the present invention, the radial distance between the rib surface of the rib closest to the second distal end among the plurality of ribs and the axis may be smaller than the radial distance between the rib surface of the rib closest to the second proximal end among the plurality of ribs and the axis. In this case, the holder can enhance the movement restraining effect of the second introducing member by the plurality of ribs. Further, the holder can increase the angle formed between the first introducing member disposed in the inner cavity and the second introducing member held by the ribs. Therefore, the holder can prevent the second introducing member from getting in the way when the user operates the first introducing member at hand. For this reason, the holder can improve the operability of the first introducing member by the user.

[0017] In the present invention, the width of the rib closest to the second distal end among the plurality of ribs in the second extending direction may be larger than the width of the rib closest to the second distal end among the plurality of ribs in the second extending direction. In this case, the holder can enhance the movement restraining effect of the second introducing member by the plurality of ribs.

[0018] In the present invention, the base portion has a groove through which the second introducing member is inserted, and the distance in the radial direction centered on the axis between the virtual axis extending along the second extending direction through the center of the base portion and the groove may become smaller as it approaches the second distal end. In this case, the holder can guide the second introducing member toward the center of the base portion.

[0019] In the present invention, the end portion of the inner cavity on the side of the second distal end may open at the second distal end of the base portion, and the end portion of the inner cavity on the side of the second proximal end may open on the side surface of the base portion. In this case, the holding tool can increase the angle formed by the first introduction member disposed in the inner cavity and the second introduction member held by the fixing portion. Therefore, the holding tool can prevent the second introduction member from getting in the way when the user operates the first introduction member at hand. For this reason, the holding tool can improve the operability of the first introduction member by the user.

[0020] In the present invention, a rod-shaped extension portion provided at the second proximal end of the base portion and extending from the second proximal end to the side opposite to the second distal end may be further provided. In this case, the user can operate the holding tool by gripping the extension portion or the gripping portion provided at the proximal end of the extension portion. Therefore, the holding tool can improve the operability by the user.

[0021] In the present invention, the area of the portion surrounded by the outer edge in the cross section perpendicular to the second extending direction of the base portion may be larger than the area of the portion surrounded by the outer edge in the cross section perpendicular to the second extending direction of the extension portion. By relatively reducing the cross-sectional area of the extension portion, the holding tool can suppress the outflow of blood from the gap between the through portion of the introduction assist tool and the extension portion.

[0022] In the present invention, the first projection region obtained by projecting the inner cavity onto a plane perpendicular to the second extending direction and the second projection region obtained by projecting the extension portion onto a plane perpendicular to the second extending direction may be separated from each other in a direction perpendicular to the second extending direction. In this case, the holding tool can suppress the contact between the first introduction member inserted into the inner cavity and the extension portion.

[0023] In the present invention, the first projection region obtained by projecting the inner cavity onto a plane perpendicular to the second extending direction and the second projection region obtained by projecting the extension portion onto a plane perpendicular to the second extending direction may be in contact with each other in a direction perpendicular to the second extending direction. In this case, the holding tool can suppress the outflow of blood from the gap between the first introduction member and the extension portion inserted into the inner cavity and the through portion of the introduction assist tool.

Brief Description of the Drawings

[0024]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Figure 18

Figure 19

Figure 20

DETAILED DESCRIPTION OF THE INVENTION

[0025] Hereinafter, the holder 1 according to an embodiment of the present invention will be described with reference to the drawings. The drawings referred to are used to explain the technical features that can be adopted by the present invention. The configuration of the described device and the like is not intended to be limited thereto, but is merely an illustrative example. In the following description, the vertical direction in FIG. 1 is referred to as the "first extension direction" of the Y connector 9. The upper side of FIG. 1 is referred to as the "first proximal end side" of the Y connector 9, and the lower side is referred to as the "first distal end side" of the Y connector 9. The left-right direction in each of FIGS. 5, 11, 14, and 18 is referred to as the "second extension direction" of the holder 1. The right side in each of FIGS. 5, 11, 14, and 18 is referred to as the "second proximal end side" of the holder 1, and the left side is referred to as the "second distal end side" of the holder 1.

[0026] The Y connector 9 is an introduction assistive device used when performing intravascular treatment using a catheter, a guide wire, or the like (hereinafter referred to as an "introduction member"). The Y connector 9 assists in the introduction of the introduction member by fixing the introduction member and suppressing bleeding from the blood vessel during treatment using the introduction member. The holder 1 is used by being attached to the Y connector 9.

[0027] <Y connector 9> As shown in FIGS. 1 to 3, the Y connector 9 mainly includes a main tube member 9A, a cap member 9B, a fixed valve 9C (see FIGS. 2 and 3), a hemostatic valve 9D (see FIGS. 2 and 3), a valve holding member 9E (see FIGS. 2 and 3), an opener 9F, and a rotator 9G.

[0028] The main pipe member 9A has a substantially Y shape. The main pipe member 9A has a main branch 91 and a sub-branch 92. The main branch 91 extends linearly along the first extension direction. The sub-branch 92 is connected to the main branch 91 and extends in a direction inclined toward the first proximal end side with respect to the direction orthogonal to the first extension direction. The main branch 91 and the sub-branch 92 are each a tubular member having a circular cross-sectional shape. As shown in FIGS. 2 and 3, the main branch 91 has a through hole 91H. The sub-branch 92 has a through hole 92H. The through holes 91H and 92H communicate with each other at the connection portion between the main branch 91 and the sub-branch 92.

[0029] The cap member 9B is connected to the end portion on the first proximal end side of the main branch 91. As shown in FIG. 2, the cap member 9B houses a hemostatic valve 9D and a valve holding member 9E, which will be described later. The cap member 9B has a bottomed cylindrical shape. As shown in FIG. 3, the cap member 9B has a peripheral wall portion 93A and a bottom portion 93B. The peripheral wall portion 93A is a cylindrical member having a circular cross-sectional shape. Threads are formed on the inner peripheral surface of the peripheral wall portion 93A. The cap member 9B is assembled to the main pipe member 9A by being screwed to the end portion on the first proximal end side of the main branch 91. The bottom portion 93B covers the end portion on the first proximal end side of the peripheral wall portion 93A. A through hole 93H extending along the first extension direction is provided in the bottom portion 93B.

[0030] As shown in FIG. 2, the valve holding member 9E is housed in the cap member 9B. As shown in FIG. 3, the valve holding member 9E has a cylindrical main body portion 94. The main body portion 94 has a through hole 94H. The valve holding member 9E houses a hemostatic valve 9D, which will be described later, inside.

[0031] The fixed valve 9C is formed of an elastic synthetic resin. The fixed valve 9C has a cylindrical main body portion 95. The main body portion 95 has a through hole 95H. The through hole 95H penetrates the main body portion 95 in the first extension direction. The fixed valve 9C is assembled to the main pipe member 9A and the cap member 9B by screwing the cap member 9B to the main pipe member 9A with the fixed valve 9C accommodated in the main pipe member 9A. The fixed valve 9C is sandwiched and compressed from both sides in the first extension direction by the valve holding member 9E in a state of being accommodated in the cap member 9B and the main pipe member 9A. The through hole 95H of the fixed valve 9C communicates with the through hole 91H of the main pipe member 9A and the through hole 94H of the valve holding member 9E.

[0032] As shown in FIG. 2, the hemostatic valve 9D is held by the valve holding member 9E. As shown in FIG. 3, the hemostatic valve 9D has a circular plate-shaped base portion 96. The base portion 96 is formed of an elastic material. The base portion 96 has a slit 96S. The slit 96S penetrates the center of the base portion 96 in the first extension direction. The hemostatic valve 9D is assembled to the cap member 9B and the valve holding member 9E. The hemostatic valve 9D is sandwiched and compressed from both sides in the first extension direction by the cap member 9B and the valve holding member 9E in the assembled state.

[0033] As shown in FIGS. 2 and 3, the opener 9F has a cylindrical portion 97 and a flange portion 98. The cylindrical portion 97 has a cylindrical shape. The cylindrical portion 97 extends in the extension direction. The cylindrical portion 97 is inserted into the through hole 93H of the cap member 9B. The cylindrical portion 97 is held movably in the first extension direction with respect to the cap member 9B. The flange portion 98 is provided at the end portion on the first proximal end side of the cylindrical portion 97. The flange portion 98 has a circular plate shape. When the opener 9F moves to the first distal end side, the end portion on the first distal end side of the cylindrical portion 97 opens the slit 96S of the hemostatic valve 9D. A through hole 97H is formed in the opener 9F. The through hole 97H penetrates the centers of the cylindrical portion 97 and the flange portion 98 in the first extension direction.

[0034] As shown in FIG. 2, the rotor 9G is attached to the end portion on the first tip side of the main branch 91 of the main pipe member 9A. The rotor 9G is a member for connecting the Y connector 9 to a guiding catheter (not shown). As shown in FIG. 3, the rotor 9G has a cylindrical portion 99. The cylindrical portion 99 has a through hole 99H penetrating in the first extending direction.

[0035] The end portion on the first tip side of the rotor 9G corresponds to the end portion on the first tip side of the entire Y connector 9. The end portion on the first proximal side of the opener 9F corresponds to the end portion on the first proximal side of the entire Y connector 9. Hereinafter, the end portion on the first tip side of the rotor 9G is referred to as the "first tip portion 90D". The end portion on the first proximal side of the opener 9F is referred to as the "first proximal portion 90P". The through holes 91H, 93H, 94H, 95H, 97H, 99H, and the slit 96S that communicate integrally in the state where the main pipe member 9A, the cap member 9B, the fixed valve 9C, the valve holding member 9E, the opener 9F, and the rotor 9G are assembled are referred to as the "through portion 9H". The through portion 9H penetrates in the first extending direction from the first tip portion 90D to the first proximal portion 90P of the Y connector 9. A virtual axis extending along the first extending direction through the centers of the through holes 91H, 93H, 94H, 95H, 97H, 99H, and the slit 96S is referred to as the "axis C1".

[0036] With the introduction member introduced into the through-hole 9H, the slit 96S of the hemostatic valve 9D is in close contact with the introduction member. This suppresses the leakage of blood or the like from the first distal end side to the first proximal end side of the hemostatic valve 9D through the through-hole 9H. Also, when the introduction member is fixed to the Y-connector 9 for use, the user screws the cap member 9B onto the main pipe member 9A. As a result, the main pipe member 9A moves toward the first proximal end side with respect to the cap member 9B. The fixed valve 9C is strongly sandwiched between the valve holding member 9E and the main pipe member 9A from both sides in the first extending direction. The through-hole 95H of the fixed valve 9C expands inward as the main body portion 95 is compressed from both sides in the extending direction. The diameter of the through-hole 95H decreases. The introduction member inserted through the through-hole 95H is compressed as the diameter of the through-hole 95H decreases, and becomes immovable in the first extending direction. Thereby, the user can fix the introduction member to the Y-connector 9.

[0037] With the introduction member reaching the position of the treatment target, a device such as a liquid agent supply device is connected to the sub-branch 92 of the main pipe member 9A, and a liquid agent such as a contrast agent is supplied. The supplied liquid agent enters the guiding catheter through the through-hole 91H of the main branch 91 and is administered to the position of the treatment target.

[0038] When air is mixed in on the first distal end side of the hemostatic valve 9D, or when a complicated operation of the introduction member is performed, the user performs an operation of moving the opener 9F toward the first distal end side. As a result, the cylindrical portion 97 of the opener 9F is inserted into the slit 96S of the hemostatic valve 9D. The slit 96S opens. In this state, the air mixed in on the first distal end side of the hemostatic valve 9D is removed. Also, since the movement of the introduction member is not inhibited by the hemostatic valve 9D, a complicated operation of the introduction member by the user becomes possible.

[0039] <Holder 1> The holders 1A (see FIGS. 4 to 10), 1B (see FIGS. 11 and 12), 1C (see FIGS. 13 to 15), and 1D (see FIGS. 16 to 20) are mounted and used on the side of the first base end portion 90P with respect to the Y connector 9. The holders 1A to 1D are collectively referred to as the "holder 1". The holder 1 is preferably used when a plurality of introduction members are introduced into the body using the Y connector 9. Hereinafter, as an example, the case where two introduction members (the first introduction member D1 and the second introduction member D2) are introduced into the body will be described. The first introduction member D1 is, for example, a rapid exchange (RX) type catheter for percutaneous transluminal coronary angioplasty (PTCA). The second introduction member D2 is, for example, a guide wire.

[0040] <First Embodiment (Holder 1A)> Referring to FIGS. 4 to 8, the holder 1A according to the first embodiment of the present invention will be described. The holder 1A has a base portion 2 extending along the second extending direction. The end portion on the second distal end side of the base portion 2 is referred to as the "second distal end portion 20D". The end portion on the second base end side of the base portion 2 is referred to as the "second base end portion 20P".

[0041] The base portion 2 has a columnar first portion 2A and a second portion 2B. The first portion 2A extends from the second distal end portion 20D toward the second base end side. The second portion 2B extends between the end portion on the second base end side of the first portion 2A and the second base end portion 20P. The length of the first portion 2A in the second extending direction is longer than the length of the second portion 2B in the second extending direction. The virtual axis passing through the centers of the first portion 2A and the second portion 2B is referred to as the "axis C2". The respective diameters of the first portion 2A and the second portion 2B correspond to the radial widths centered on the axis C2. The diameter of the second portion 2B is larger than the diameter of the first portion 2A.

[0042] A notch 22 is formed in the side surface 28 of the first part 2A. The notch 22 extends in a direction away from the axis C2 from the second tip 20D toward the second proximal side. A virtual plane extending along the notch 22 intersects the second extending direction. Notches 23 and 24 are formed in the side surface 29 of the second part 2B. The notch 23 extends parallel to the axis C2 from the end on the second tip side of the second part 2B toward the second proximal side. A virtual plane extending along the notch 23 is in contact with the side surface 28 of the first part 2A. The notch 24 extends in a direction approaching the axis C2 from the end on the second proximal side of the notch 23 toward the second base end 20P.

[0043] An inner cavity 2H and a slit 2S are formed in the base 2. The inner cavity 2H has a circular cross-sectional shape and penetrates the base 2 between the second tip 20D and the second base end 20P. The inner cavity 2H extends along the second extending direction. The slit 2S extends along the second extending direction between the second tip 20D and the second base end 20P. The space inside the inner cavity 2H and the space outside the side surface 28 of the first part 2A and the side surface 29 of the second part 2B are communicated by the slit 2S over the entire region of the second extending direction of the inner cavity 2H.

[0044] As shown in FIG. 6, a pair of wall portions 201 forming the slit 2S face each other. The interval between the pair of wall portions 201 of the slit 2S corresponds to the width L22 of the slit 2S. The width L22 of the slit 2S is smaller than the diameter L21 of the inner cavity 2H.

[0045] As shown in FIGS. 4 and 5, a pair of protrusions 27 are provided on a pair of wall portions 201 (see FIG. 6) forming the slit 2S formed in the second part 2B. The pair of protrusions 27 protrude from each of the pair of wall portions 201 toward the inside in the width direction of the slit 2S. The width of the slit 2S is smaller in the portion where the pair of protrusions 27 are provided than in other portions. Hereinafter, the "width of the slit 2S" refers to the width of the portion of the slit 2S where the pair of protrusions 27 are not provided. The width of the portion of the slit 2S where the pair of protrusions 27 are provided is referred to as the "width of the pair of protrusions 27".

[0046] On the side surface 28 of the first part 2A of the base 2, ribs 25 and 26 are provided. The ribs 25 and 26 each extend in the circumferential direction centered on the axis C2. The ribs 25 and 26 are arranged in the second extension direction. The rib 25 is located on the second tip side with respect to the rib 26. The lengths of the ribs 25 and 26 in the second extension direction are equal.

[0047] The radially outer surface of the rib 25 centered on the axis C2 is referred to as the "rib surface 25A". The radially outer surface of the rib 26 centered on the axis C2 is referred to as the "rib surface 26A". The radial distance between the axis C2 and the rib surface 25A corresponds to the radius of the rib 25. The radial distance between the axis C2 and the rib surface 26A corresponds to the radius of the rib 26. The respective radii of the ribs 25 and 26 do not change over the second extension direction. The respective radii of the ribs 25 and 26 are the same. The radii of the ribs 25 and 26 are larger than the radial distance between the side surface 28 of the first part 2A and the axis C2.

[0048] A notch 25B is formed in the rib surface 25A of the rib 25. A notch 26B is formed in the rib surface 26A of the rib 26. The virtual planes extending along the notches 25B and 26B are common and are in contact with the side surface 28 of the first part 2A. The virtual plane extending along the notches 25B and 26B and the virtual plane extending along the notch 23 of the second part 2B are common.

[0049] Referring to FIGS. 7 and 8, a first example of the usage method of the holder 1A will be described. First, the user passes the first introduction member D1 through the slit 2S of the holder 1A and places the first introduction member D1 in the inner cavity 2H. Note that the diameter of the first introduction member D1 is smaller than the diameter of the inner cavity 2H and the width of the slit 2S, and is larger than the width of the pair of protrusions 27. For this reason, the user pushes the first introduction member D1 against the portion of the slit 2S where the pair of protrusions 27 are provided and widens the width of the portion where the pair of protrusions 27 are provided, thereby placing the first introduction member D1 in the inner cavity 2H. Thereby, the first introduction member D1 is supported so as to be movable in the second extension direction within the inner cavity 2H, and is in a state where it cannot be detached from the inner cavity 2H by the pair of protrusions 27.

[0050] Next, the user inserts the second introduction member D2 into the through-hole 97H of the opener 9F of the Y-connector 9 and feeds it into the through-section 9H. The slit 96S of the hemostatic valve 9D adheres closely to the second introduction member D2 within the Y-connector 9. The second introduction member D2 is introduced into the guiding catheter attached to the rotator 9G and is introduced into the body through the guiding catheter. The first introduction member D1 reaches the position of the treatment target.

[0051] Next, as shown in FIG. 7, the user grips the second part 2B of the holder 1A while holding the first introduction member D1 and inserts it in order from the second tip 20D into the through-hole 97H of the opener 9F of the Y-connector 9 (arrow Y1). The second extension direction of the holder 1A extends along the first extension direction of the Y-connector 9. The axis C2 of the holder 1A and the axis C1 of the Y-connector 9 are aligned in a straight line. At this time, the second introduction member D2 is disposed between the through-hole 97H of the Y-connector 9 and the holder 1A. The through-hole 97H of the Y-connector 9 and the side surface 28 of the first part 2A of the holder 1A face each other. The user adjusts the position of the second introduction member D2 with respect to the holder 1A so that the notches 25B, 26B of the ribs 25, 26 and the notch 23 of the second part 2B of the holder 1A do not face the second introduction member D2. Thereby, the second introduction member D2 is sandwiched between the through-hole 97H of the Y-connector 9 and the ribs 25, 26 of the holder 1A.

[0052] As shown in FIG. 8, when the second tip 20D of the holder 1A is positioned slightly on the first proximal end side with respect to the hemostatic valve 9D of the Y-connector 9, the insertion of the holder 1A is stopped. Thereby, the holder 1A is attached to the Y-connector 9. The distance in the extension direction between the first tip 90D (see FIG. 1) of the Y-connector 9 and the second tip 20D of the holder 1A is shorter than the distance in the extension direction between the first tip 90D of the Y-connector 9 and the second proximal end 20P of the holder 1A. The second introduction member D2 is sandwiched between the through-hole 97H of the Y-connector 9 and the ribs 25, 26 of the holder 1A and becomes immovable in the second extension direction.

[0053] Next, the user sends the first introduction member D1 toward the second tip side. The end portion on the second tip side of the first introduction member D1 passes through the hemostatic valve 9D and the fixing valve 9C (see FIG. 2) of the Y connector 9. Next, the user screws the cap member 9B (see FIG. 1) onto the main pipe member 9A (see FIG. 1) of the Y connector 9. The through hole 95H of the fixing valve 9C expands inward and its diameter shrinks. The user adjusts the screwing strength of the cap member 9B with respect to the main pipe member 9A of the Y connector 9 so that the movement along the second extension direction of the first introduction member D1 is maintained.

[0054] The user further sends the first introduction member D1 toward the second tip side. The first introduction member D1 is inserted into the body along the second introduction member D2 through the inner cavity 2H of the holder 1A and the through portion 9H of the Y connector 9. The end portion on the second tip side of the first introduction member D1 moves to the second tip side from the tip portion of the guiding catheter and reaches the position of the treatment target.

[0055] Next, the user further screws the cap member 9B onto the main pipe member 9A of the Y connector 9. The through hole 95H of the fixing valve 9C expands inward and its diameter shrinks. The first introduction member D1 and the second introduction member D2 inserted through the through hole 95H of the fixing valve 9C (see FIG. 2) are compressed as the diameter of the through hole 95H shrinks and become immovable in the extension direction. The first introduction member D1 and the second introduction member D2 are fixed to the Y connector 9. In this state, the user treats the treatment target with the first introduction member D1.

[0056] Note that instead of the first example of the usage method described above, the holder 1A may be used according to the second example of the usage method shown below. First, the user inserts the first introduction member D1 and the second introduction member D2 into the through hole 97H of the opener 9F of the Y connector 9 and feeds them into the through portion 9H respectively. The first introduction member D1 and the second introduction member D2 are introduced into the guiding catheter attached to the rotator 9G and introduced into the body through the guiding catheter.

[0057] Next, the user passes the first introduction member D1 through the slit 2S of the holder 1A. The first introduction member D1 is supported so as to be movable in the second extending direction within the inner cavity 2H of the holder 1A. Next, as shown in FIG. 7, the user grips the second portion 2B of the holder 1A while supporting the first introduction member D1, and inserts it in order from the second tip portion 20D into the through hole 97H of the opener 9F of the Y connector 9 (arrow Y1). Since the subsequent usage method is the same as that of the first example of the usage method, the description thereof is omitted.

[0058] <Actions and effects of the first embodiment> The holder 1A allows the first introduction member D1 to move along the inner cavity 2H in the second extending direction, and holds the second introduction member D2 immovable in the second extending direction by the ribs 25 and 26. Therefore, the user can move the first introduction member D1 to the treatment target and perform treatment in a state where the first introduction member D1 is movable and the second introduction member D2 is immovable.

[0059] The base 2 of the holder 1A has a slit 2S. The slit 2S communicates the space inside the inner cavity 2H with the space outside the side surfaces 28 and 29 over the entire region in the second extending direction of the inner cavity 2H. For this reason, the user can attach the first introduction member D1 to the inner cavity 2H via the slit 2S. In particular, the slit 2S functions effectively when the holder 1A is attached to the first introduction member D1 in a state where it has been introduced into the body, as in the second example of the usage method.

[0060] The holder 1A communicates the space inside the inner cavity 2H with the space outside the side surfaces 28 and 29 by the slit 2S. Thereby, the holder 1A can facilitate the operation of the user to attach the first introduction member D1 to the inner cavity 2H while maintaining the strength of the base 2. Also, the width L22 of the slit 2S is smaller than the diameter L21 of the inner cavity 2H. Thereby, the holder 1A can suppress the first introduction member D1 attached to the inner cavity 2H from detaching through the slit 2S.

[0061] The holding tool 1A has a pair of protrusions 27 on a part of a pair of wall portions 201 that form the slit 2S. The width of the pair of protrusions 27 is smaller than the width of the slit 2S. Therefore, the holding tool 1A can suppress the detachment of the first introduction member D1 attached to the inner cavity 2H through the slit 2S by the pair of protrusions 27.

[0062] The ribs 25 and 26 extend in the circumferential direction centered on the axis C2. The radius of each of the ribs 25 and 26 is larger than the radial distance between the side surface 28 of the first part 2A and the axis C2. The ribs 25 and 26 can stably maintain the second introduction member D2 sandwiched between them and the through-hole 97H of the Y-connector 9 in a state where it cannot move in the second extension direction.

[0063] The ribs 25 and 26 are arranged side by side in the second extension direction, and the second introduction member D2 can be sandwiched between them and the through-hole 97H of the Y-connector 9 at a plurality of positions in the second extension direction. Therefore, the holding tool 1A can enhance the movement restraining effect of the second introduction member D2 by the ribs 25 and 26.

[0064] A notch 22 is provided in the second tip portion 20D of the first part 2A of the first introduction member D1, and the diameter becomes smaller toward the second tip side. Therefore, the user can easily perform the operation of inserting the holding tool 1A from the second tip portion 20D into the through-hole 97H of the opener 9F of the Y-connector 9. Also, a notch 24 is provided in the second base end portion 20P of the second part 2B of the first introduction member D1. The user can easily perform the operation of applying a force toward the second tip side to the holding tool 1A by applying a force to the notch 24. Therefore, the user can easily perform the operation of inserting the holding tool 1A from the second tip portion 20D into the through-hole 97H of the opener 9F of the Y-connector 9.

[0065] <Special features of the first embodiment> The slit 2S may extend while curving along the second extending direction, or may extend in a spiral shape. The base 2 of the holder 1A may be elastically deformable. The width of the slit 2S may change when a user applies an external force. For example, when the user attaches the first introduction member D1 with a large diameter to the inner cavity 2H, the user may elastically deform the base 2 so that the width of the slit 2S expands. Thereby, the holder 1A can facilitate the operation of the user attaching the first introduction member D1 to the inner cavity 2H.

[0066] The slit 2S does not necessarily need to be constantly formed in the base 2. For example, as shown in FIG. 9, instead of the slit 2S, a notch 21S may be formed in the base 2. The notch 21S may extend from the inner cavity 2H across the side surfaces 28 and 29. The base 2 may be elastically deformable. In a state where no external force is acting on the base 2, the pair of wall portions 202 forming the notch 21S may be in proximity to and in contact with each other by elastic force (arrow Y2). For example, the user may apply an external force in a direction in which the pair of wall portions 202 are separated from each other. In this case, the base 2 may be elastically deformed, and the pair of wall portions 202 may be separated from each other to form the slit 2S (arrow Y3).

[0067] The number of ribs is not limited to one, and may be one or three or more. The distance between the rib surface of the rib and the axis C2 does not necessarily need to be the same throughout the entire second extending direction. For example, as shown in FIG. 10, instead of the ribs 25 and 26, one rib 85 may be provided on the holder 1A. The radial distance between the rib surface 85A of the rib 85 and the axis C2, that is, the radius of the rib 85, may gradually increase from the second tip side toward the second base end side. In this case, the holder 1A can enhance the effect of restraining the movement of the second introduction member D2 by the rib 85 compared to the case where the radius of the rib is uniform.

[0068] The inner ends of the pair of protrusions 27 provided on the slit 2S may be in contact with each other. Instead of the pair of protrusions 27, a protrusion may be provided only on one side of the pair of wall portions 201 forming the slit 2S.

[0069] The internal cavities provided in the base 2 are not limited to one, and two or more may be provided. The slit 2S may not be provided in the internal cavity 2H. The base 2 may have only the first part 2A, and the second part 2B may not be provided.

[0070] For example, when the user attaches the holder 1A to the Y connector 9, the user may adjust the position of the second introduction member D2 with respect to the holder 1A such that the notches 25B, 26B of the ribs 25, 26 and the notch 23 of the second part 2B face the second introduction member D2. In this case, the second introduction member D2 is not sandwiched between the through hole 97H of the Y connector 9 and the ribs 25, 26 of the holder 1A, and is movable in the second extending direction. Thus, the user can switch between a state where the second introduction member D2 is movable in the second extending direction and a state where it is immovable according to the situation by adjusting the position of the second introduction member D2 with respect to the holder 1A.

[0071] The user may insert the holder 1A into the Y connector 9 until the second part 2B of the holder 1A closes the through hole 97H of the Y connector 9. In this case, the holder 1A may make the second introduction member D2 immovable in the second extending direction by sandwiching the second introduction member D2 between the through hole 97H and the second part 2B. In this case, in addition to the function of being gripped by the user, the second part 2B also functions as a rib for sandwiching the second introduction member D2.

[0072] <Second Embodiment (Holder 1B)> Referring to FIGS. 11 and 12, the holder 1B according to the second embodiment of the present invention will be described. The holder 1B is different from the holder 1A in that it has ribs 31, 32, 33 instead of the ribs 25, 26 (see FIGS. 4 to 8) of the holder 1A, and newly has a groove 34. For the configurations common to the holder 1A, the same reference numerals as those of the holder 1A are given, and the description thereof is omitted.

[0073] In the holding tool 1B, ribs 31, 32, and 33 are provided on the side surface 28 of the first part 2A of the base 2. The ribs 31, 32, and 33 each extend in the circumferential direction centered on the axis C2. The ribs 31, 32, and 33 are arranged in the second extending direction from the second tip side toward the second base end side in this order. The width L31 of the rib 31 in the second extending direction is equal to the width L32 of the rib 32 in the second extending direction, and the width L33 of the rib 33 in the second extending direction is larger than the widths L31 and L32.

[0074] The radially outer surface of the rib 31 centered on the axis C2 is referred to as the "rib surface 31A". The radially outer surface of the rib 32 centered on the axis C2 is referred to as the "rib surface 32A". The radially outer surface of the rib 33 centered on the axis C2 is referred to as the "rib surface 33A". The radial distance between the axis C2 and the rib surface 31A corresponds to the radius of the rib 31. The radial distance between the axis C2 and the rib surface 32A corresponds to the radius of the rib 32. The radial distance between the axis C2 and the rib surface 33A corresponds to the radius of the rib 33.

[0075] The radius of each of the ribs 31, 32, and 33 does not change along the second extending direction. The radius of each of the ribs 31 and 32 is equal. The radius of the rib 33 is larger than the radius of each of the ribs 31 and 32.

[0076] A notch 31B is formed in the rib surface 31A of the rib 31. A notch 32B is formed in the rib surface 32A of the rib 32. A notch 33B is formed in the rib surface 33A of the rib 33. The virtual planes extending along the notches 31B, 32B, and 33B are common and in contact with the side surface 28 of the first part 2A.

[0077] A groove 34 is formed in the vicinity of the second tip portion 20D of the first part 2A of the base 2. The groove 34 extends from a portion of the side surface 28 of the first part 2A of the base 2 that is on the second tip side of the rib 31 toward the second tip portion 20D. The groove 34 is connected to the inner cavity 2H at the second tip portion 20D. The radial distance between the groove 34 and the axis C2 becomes smaller as it approaches the second tip portion 20D.

[0078] In the groove 34, in addition to the second introduction member D2, a third introduction member D3 is inserted. The third introduction member D3 is, for example, a guide extension shaft.

[0079] The usage method of the holder 1B when the third introduction member D3 is used is as follows. First, the user inserts the second introduction member D2 and the third introduction member D3 into the through-hole 97H of the opener 9F of the Y-connector 9 and feeds them into the through-section 9H. The second introduction member D2 and the third introduction member D3 are introduced into the guiding catheter attached to the rotator 9G and introduced into the body through the guiding catheter. The second introduction member D2 and the third introduction member D3 move to the second tip side rather than the tip of the guiding catheter.

[0080] Next, the user passes the second introduction member D2 and the third introduction member D3 through the groove 34 of the holder 1B while holding the first introduction member D1. Next, the user inserts the holder 1B holding the first introduction member D1, the second introduction member D2, and the third introduction member D3 into the through-hole 97H of the opener 9F of the Y-connector 9. The second introduction member D2 and the third introduction member D3 are clamped between the through-hole 97H of the Y-connector 9 and the ribs 31 to 33 of the holder 1B. When the second tip portion 20D of the holder 1B is positioned slightly on the first proximal side rather than the hemostatic valve 9D of the Y-connector 9, the insertion of the holder 1B is stopped. Thereby, the holder 1B is attached to the Y-connector 9. The second introduction member D2 and the third introduction member D3 are clamped between the through-hole 97H of the Y-connector 9 and the ribs 31 to 33 of the holder 1B and become immovable in the extending direction.

[0081] Next, the user sends out the first introduction member D1 to the tip side, and then screws the cap member 9B onto the main pipe member 9A of the Y-connector 9. The user adjusts the screwing strength of the cap member 9B with respect to the main pipe member 9A of the Y-connector 9 so that the state where movement along the extending direction of the first introduction member D1 is possible is maintained. The user further sends out the first introduction member D1 to the second tip side. The first introduction member D1 is inserted into the body along the second introduction member D2 through the inner cavity 2H of the holder 1B and the through-hole 9H of the Y-connector 9. The end portion on the tip side of the second introduction member D2 moves to the tip side of the tip portion of the third introduction member D3 and reaches the position of the treatment target.

[0082] Next, the user further screws the cap member 9B onto the main pipe member 9A of the Y-connector 9. The first introduction member D1, the second introduction member D2, and the third introduction member D3 in the state of being inserted through the through-hole 95H of the fixed valve 9C are compressed by the reduction of the diameter of the through-hole 95H and become immovable in the extending direction. The first introduction member D1, the second introduction member D2, and the third introduction member D3 are fixed to the Y-connector 9. In this state, the user treats the treatment target with the first introduction member D1.

[0083] Note that the above usage method corresponds to the first example of the usage method in the holder 1A, but the holder 1B may be used in a method corresponding to the second example of the usage method in the holder 1A. That is, first, the first introduction member D1, the second introduction member D2, and the third introduction member D3 may be inserted into the through-hole 97H of the opener 9F of the Y-connector 9. Next, the first introduction member D1 may be passed through the slit 2S of the holder 1B and held in the inner cavity 2H. Next, the second introduction member D2 and the third introduction member D3 may be passed through the groove 34 of the holder 1B.

[0084] <Actions and Effects of the Second Embodiment> In the holder 1B, the radius of the rib 33 closest to the second base end portion 20P is larger than the radius of the rib 31 closest to the second tip end portion 20D among the ribs 31 to 33. In this case, the holder 1B can enhance the effect of restraining the movement of the second introduction member D2 and the third introduction member D3 by the ribs 31 to 33. Further, the second introduction member D2 and the third introduction member D3 sandwiched by the ribs 31 to 33 extend in a direction inclined with respect to the axis C2. For this reason, the angle formed by the first introduction member D1 held in the inner cavity 2H of the holder 1B and the second introduction member D2 and the third introduction member D3 can be increased. In this case, the holder 1B can prevent the second introduction member D2 and the third introduction member D3 from getting in the way when the user operates the first introduction member D1 at hand, so that the operability of the user can be improved.

[0085] In the holder 1B, the width L33 in the second extension direction of the rib 33 closest to the second base end portion 20P is larger than the width L31 in the second extension direction of the rib 31 closest to the second tip end portion 20D among the ribs 31 to 33. In this case, the second introduction member D2 and the third introduction member D3 are more strongly sandwiched between the through hole 97H of the Y connector 9 and the ribs 31 to 33 toward the second base end side portion. Thereby, the holder 1B can enhance the effect of restraining the movement of the second introduction member D2 and the third introduction member D3 by the ribs 31 to 33.

[0086] A groove 34 is provided near the second tip end portion 20D of the first portion 2A of the base portion 2. The radial distance between the groove 34 and the axis C2 becomes smaller as it approaches the second tip end portion 20D. Thereby, the second introduction member D2 and the third introduction member D3 held by the groove 34 of the holder 1B are guided toward the axis C2. In this case, the second introduction member D2 and the third introduction member D3 can be arranged near the center portion of the hemostatic valve 9D of the Y connector 9. Note that the slit 96S of the hemostatic valve 9D is provided at the center of the base 96 of the hemostatic valve 9D. Therefore, the holder 1B can insert the second introduction member D2 and the third introduction member D3 into the slit 96S of the hemostatic valve 9D without bending them, so that it is possible to suppress the outflow of blood from the gap between the second introduction member D2 and the third introduction member D3 and the slit 96S.

[0087] <Features of the Second Embodiment> The width L31 of the rib 32 in the second extending direction and the width L33 of the rib 33 in the second extending direction may be equal. The widths L32 and L33 may be larger than the width L31 of the rib 31 in the second extending direction. The widths L31, L32, and L33 may gradually increase in this order.

[0088] The respective radii of the ribs 32 and 33 may be equal. The respective radii of the ribs 32 and 33 may be larger than the radius of the rib 31. The respective radii of the ribs 31, 32, and 33 may gradually increase in this order. The respective radii of the ribs 31, 32, and 33 may increase from the second tip side toward the second base end side. That is, the rib surfaces 31A of the rib 31, the rib surfaces 32A of the rib 32, and the rib surfaces 33A of the rib 33 may be inclined with respect to the axis C2. In this case, the maximum value of the radius of the rib 33 may be larger than the maximum value of the radius of the rib 31. Virtual straight lines extending in the second extending direction along the rib surfaces 31A of the rib 31, the rib surfaces 32A of the rib 32, and the rib surfaces 33A of the rib 33 may be arranged in a straight line.

[0089] The holder 1B may have a plurality of grooves in the vicinity of the second tip portion 20D. The second introduction member D2 and the third introduction member D3 may be held by different grooves, respectively.

[0090] <Third Embodiment (Holder 1C)> With reference to FIGS. 13 to 15, the holder 1C according to the third embodiment of the present invention will be described. The holder 1C has a base portion 5 extending along the second extending direction. The end portion on the second tip side of the base portion 5 is referred to as the "second tip portion 50D". The end portion on the second base end side of the base portion 5 is referred to as the "second base end portion 50P".

[0091] The base 5 has a first part 5A and a gripping part 5B. The first part 5A has a cylindrical shape and extends from the second tip part 50D toward the second base end side. The gripping part 5B has a rectangular parallelepiped shape and extends between the end part on the second base end side of the first part 5A and the second base part 50P. A virtual axis passing through the center of the first part 5A is referred to as "axis C5". The diameter of the first part 5A corresponds to the radial width centered on the axis C5.

[0092] An inner cavity 50H (see FIG. 14) and a slit 5S are formed in the base 5. The inner cavity 50H has a circular cross-sectional shape and penetrates the base 5 between the second tip part 50D and the second base part 50P. The inner cavity 50H extends along the second extension direction. The slit 5S extends along the second extension direction between the second tip part 50D and the second base part 50P. The width of the slit 5S is smaller than the diameter of the inner cavity 50H.

[0093] As shown in FIG. 14, a cylinder 55 is fitted into the part of the inner cavity 50H from the substantially central part in the second extension direction to the second base part 50P. The end face 55A on the second tip side of the cylinder 55 is inclined with respect to the plane orthogonal to the axis C5. A part of the side face of the inner cavity 50H, which is located on the opposite side across the axis C5 from the part where the slit 5S is formed, is referred to as the "bottom side part". The direction from the second tip side toward the second base end side along the end face 55A is inclined from the bottom side part toward the slit 5S. The inner space of the inner cavity 50H is formed only in the part from the second tip part 50D to the end face 55A of the cylinder 55.

[0094] Hereinafter, the part of the inner cavity 50H from the second tip part 50D to the end face 55A of the cylinder 55 is referred to as "inner cavity 5H". The end on the second tip side of the inner cavity 5H opens at the second tip part 50D. The end on the second base end side of the inner cavity 5H opens via the slit 5S at the same position as the end face 55A in the second extension direction on the side face 58 of the first part 5A. The inner cavity 5H extends from the second tip part 50D toward the second base end side to the substantially central part in the second extension direction of the first part 5A of the base 5. The inner space of the inner cavity 5H and the outer space of the side face 58 of the first part 5A are communicated by the slit 5S over the entire region in the second extension direction of the inner cavity 5H.

[0095] Referring to FIG. 15, the usage method of the holder 1C will be described. First, the user passes the first introduction member D1 through the slit 5S of the holder 1C and places the first introduction member D1 in the inner cavity 5H. The first introduction member D1 extends in the second extension direction within the inner cavity 5H from the second tip portion 50D toward the second proximal end side, bends at the portion of the end face 55A, extends obliquely toward the side face 58 of the first portion 5A through the slit 5S, and is discharged from the slit 5S to the outside of the inner cavity 5H.

[0096] Next, the user inserts the second introduction member D2 into the through hole 97H of the opener 9F of the Y-connector 9 and feeds it into the through portion 9H. The second introduction member D2 is introduced into the guiding catheter attached to the rotator 9G and introduced into the body through the guiding catheter. Next, as shown in FIG. 15, the user sequentially inserts the holder 1C holding the first introduction member D1 into the through hole 97H of the opener 9F of the Y-connector 9 from the second tip portion 50D. The second introduction member D2 is disposed between the through hole 97H of the Y-connector 9 and the holder 1C.

[0097] The first portion 5A of the holder 1C moves to the first tip side through the slit 96S of the hemostatic valve 9D and the through hole 95H of the fixing valve 9C. When the second tip portion 50D of the holder 1C is positioned on the first tip side of the fixing valve 9C of the Y-connector 9, the insertion of the holder 1C is stopped. Thereby, the holder 1C is attached to the Y-connector 9. The second introduction member D2 is clamped between the through hole 95H of the fixing valve 9C of the Y-connector 9 and the side face 58 of the first portion 5A of the holder 1C. In this way, in the state where the holder 1C is attached to the Y-connector 9 and the state where the holders 1A and 1B are attached to the Y-connector 9, the positions of the second tip portions 20D and 50D in the second extension direction with respect to the Y-connector 9 are different.

[0098] Next, the user screws the cap member 9B onto the main pipe member 9A of the Y connector 9. The through hole 95H of the fixed valve 9C expands inward and its diameter shrinks. The second introduction member D2 held between the side surface 58 of the first part 5A of the holder 1C and the through hole 95H is compressed as the diameter of the through hole 95H shrinks, and becomes immovable in the extending direction. The second introduction member D2 is fixed to the Y connector 9. Since the first introduction member D1 is disposed in the inner cavity 5H, the first introduction member D1 is maintained in a state where it can move in the second extending direction.

[0099] Next, the user sends out the first introduction member D1 toward the tip side. The tip of the first introduction member D1 passes through the through hole 91H of the main pipe member 9A of the Y connector 9 and is inserted into the body along the second introduction member D2. The end on the tip side of the first introduction member D1 moves to the tip side of the tip of the guiding catheter and reaches the position of the treatment target. In this state, the user treats the treatment target with the second introduction member D2.

[0100] Note that the above usage method corresponds to the first example of the usage method of the holder 1A, but the holder 1C may be used in a method corresponding to the second example of the usage method of the holder 1A. That is, first, the first introduction member D1 and the second introduction member D2 may be inserted into the through hole 97H of the opener 9F of the Y connector 9. Thereafter, the first introduction member D1 may be passed through the slit 5S of the holder 1C and held in the inner cavity 5H.

[0101] <Actions and Effects of the Third Embodiment> In the holder 1C, the first introduction member D1 attached to the inner cavity 5H is maintained in a state where it can move in the second extending direction even when the diameter of the through hole 95H of the fixed valve 9C of the Y connector 9 shrinks. Therefore, the holder 1C can improve the operability of the first introduction member D1 by the user in a state where the second introduction member D2 is immovable.

[0102] Further, the first introduction member D1 extending along the inner cavity 5H toward the second proximal end side extends in a direction away from the axis C5 along the end face 55A inclined with respect to the axis C5. Therefore, the first introduction member D1 and the second introduction member D2 are spaced apart from each other, particularly on the second proximal end side. Therefore, the user can easily operate the first introduction member D1 and the second introduction member D2 respectively, as compared with the case where the first introduction member D1 and the second introduction member D2 are arranged close to each other.

[0103] <Special matters of the third embodiment> The holder 1C may not have the slit 5S. The inner cavity 5H may be provided across the openings provided in the second tip portion 50D of the first portion 5A of the base portion 5 and a part of the side surface 58 respectively. Ribs may be provided on the side surface 58. The holder 1C may be used in a state where the second tip portion 50D is located slightly on the first proximal end side of the hemostatic valve 9D of the Y connector 9, similar to the cases of the holders 1A and 1B. The second introduction member D2 may be sandwiched between the through hole 97H of the Y connector 9 and the rib of the holder 1C and may be immovable in the extending direction.

[0104] <Fourth embodiment (holder 1D)> Referring to FIGS. 16 to 19, the holder 1D according to the fourth embodiment of the present invention will be described. The holder 1D has a base portion 6A, an extension portion 6B, and a gripping portion 6C.

[0105] The base portion 6A is a columnar body with an elliptical cross-section and extends in the second extending direction. The end portion on the second tip side of the base portion 6A is referred to as the "second tip portion 60D". The end portion on the second proximal end side of the base portion 6A is referred to as the "second proximal end portion 60P". The base portion 6A is provided with inner cavities 61H and 62H. The inner cavities 61H and 62H each have a circular cross-sectional shape and penetrate the base portion 6A between the second tip portion 60D and the second proximal end portion 60P. The inner cavities 61H and 62H extend parallel to each other along the second extending direction. The inner cavities 61H and 62H are spaced apart in a direction perpendicular to the second extending direction.

[0106] A slit 61S is further provided in the base portion 6A. The slit 61S extends along the second extending direction across between the second tip portion 20D and the second base portion 20P. The space inside the inner cavity 61H and the space outside the side surface 68 of the base portion 6A are communicated with each other by the slit 61S across the entire region in the second extending direction of the inner cavity 61H. The width of the slit 61S is smaller than the diameter of the inner cavity 61H.

[0107] The extension portion 6B has a bar shape with a circular cross section and extends along the second extending direction. A part including the end portion on the second tip side of the extension portion 6B is inserted into the inner cavity 62H of the base portion 6A. The extension portion 6B is fixed to the base portion 6A in a state of closing the inner cavity 62H. The extension portion 6B extends along the second extending direction from the second base portion 60P of the base portion 6A toward the second base side.

[0108] The gripping portion 6C is a columnar body with a substantially square cross section and extends in the second extending direction. The end portion on the second tip side of the gripping portion 6C is referred to as the "second tip portion 64D". The end portion on the second base side of the gripping portion 6C is referred to as the "second base portion 64P". Inner cavities 66H and 67H are provided in the gripping portion 6C. The inner cavities 66H and 67H each have a circular cross-sectional shape and penetrate the gripping portion 6C across between the second tip portion 64D and the second base portion 64P. The inner cavities 66H and 67H extend parallel to each other along the second extending direction. The inner cavities 66H and 67H are separated from each other in a direction orthogonal to the second extending direction.

[0109] A slit 66S is further provided in the gripping portion 6C. The slit 66S extends along the second extending direction across between the second tip portion 64D and the second base portion 64P. The space inside the inner cavity 66H and the space outside the side surface 69 of the gripping portion 6C are communicated with each other by the slit 66S across the entire region in the second extending direction of the inner cavity 66H. The width of the slit 66S is smaller than the diameter of the inner cavity 66H.

[0110] A part including the end portion on the second base side of the extension portion 6B is inserted into the inner cavity 67H. The extension portion 6B is fixed to the gripping portion 6C in a state of closing the inner cavity 67H. The gripping portion 6C is separated from the base portion 6A toward the second base side. The gripping portion 6C is connected to the base portion 6A by the extension portion 6B.

[0111] As shown in FIG. 17, in the state where the holder 1D is viewed from the second tip side, the slits 61S, 66S, the inner cavities 61H, 66H, and the inner cavities 62H, 67H overlap each other. As shown in FIGS. 16 and 18, a virtual axis extending in the second extension direction passing through the centers of the inner cavities 61H, 66H is referred to as "axis C6". The area of the portion including the inner cavities 61H, 62H in the cross-section of the base portion 6A orthogonal to the axis C6 corresponds to the area of the portion surrounded by the outer edge in the cross-section of the base portion 6A orthogonal to the axis C6. This area is larger than the area of the cross-section of the extension portion 6B orthogonal to the axis C6. Since no inner cavity is provided in the extension portion 6B, the area of the cross-section of the extension portion 6B orthogonal to the axis C6 is equal to the area of the portion surrounded by the outer edge in the cross-section of the extension portion 6B orthogonal to the axis C6.

[0112] The area of the portion including the inner cavities 66H, 67H in the cross-section of the gripping portion 6C orthogonal to the axis C6 corresponds to the area of the portion surrounded by the outer edge in the cross-section of the gripping portion 6C orthogonal to the axis C6. This area is larger than the area of the portion including the inner cavities 61H, 62H in the cross-section of the base portion 6A orthogonal to the axis C6.

[0113] As shown in FIG. 18, the inner cavity 61H of the base portion 6A and the portion of the extension portion 6B that is inserted into the inner cavity 62H of the base portion 6A are separated in a direction orthogonal to the second extension direction. Here, the projection region obtained by projecting the inner cavity 61H onto a plane orthogonal to the second extension direction is defined as the "first projection region". The projection region obtained by projecting the portion of the extension portion 6B that protrudes from the base portion 6A toward the second proximal end side onto a plane orthogonal to the second extension direction is referred to as the "second projection region". In this case, the first projection region and the second projection region are separated in a direction orthogonal to the second extension direction.

[0114] The usage method of the retainer 1D is the same as that of the retainer 1C. The differences from the case of the retainer 1C are as follows. The first introduction member D1 is passed through the slits 61S and 66S of the retainer 1D, and the first introduction member D1 is disposed in the inner cavities 61H and 66H. Thereby, the first introduction member D1 is retained not only by the base portion 6A but also by the gripping portion 6C. Also, the user grips and operates the gripping portion 6C of the retainer 1D. For this reason, the user can easily perform the operation of inserting the base portion 6A into the Y connector 9 in order from the second tip portion 60D. Also, with the retainer 1D attached to the Y connector 9, the base portion 6A is inserted through the through hole 95H of the fixed valve 9C, and the extension portion 6B and the first introduction member D1 are inserted through the slit 96S of the hemostatic valve 9D. In this case, compared with the state where the base portion 6A is inserted through the slit 96S of the hemostatic valve 9D, the gap between the slit 96S of the hemostatic valve 9D and the extension portion 6B and the first introduction member D1 is suppressed.

[0115] Note that the above usage method corresponds to the first example of the usage method of the retainer 1A, but the retainer 1D may be used in a method corresponding to the second example of the usage method of the retainer 1A. That is, first, the first introduction member D1 and the second introduction member D2 may be inserted into the through hole 97H of the opener 9F of the Y connector 9, and then the first introduction member D1 may be passed through the slits 61S and 66S of the retainer 1D.

[0116] <Actions and effects of the fourth embodiment> The retainer 1D has an extension portion 6B and a gripping portion 6C in addition to the base portion 6A. The user can grip the gripping portion 6C to operate the retainer 1D and attach the retainer 1D to the Y connector 9. Therefore, the retainer 1D can improve the operability by the user.

[0117] The area of the portion surrounded by the outer edge in the cross section orthogonal to the second extension direction of the extension portion 6B is smaller than the area of the portion surrounded by the outer edge in the cross section orthogonal to the second extension direction of the base portion 6A. Thereby, the holder 1D can make the gap formed between the slit 96S of the hemostatic valve 9D of the Y-connector 9 and the extension portion 6B smaller than when the extension portion 6B is not provided. Therefore, the holder 1D can suppress the outflow of blood from the gap between the slit 96S of the hemostatic valve 9D of the Y-connector 9 and the extension portion 6B.

[0118] The inner cavity 61H of the base portion 6A and the extension portion 6B are separated in a direction orthogonal to the second extension direction. The inner cavity 66H of the base portion 6A and the extension portion 6B are separated in a direction orthogonal to the second extension direction. In this case, contact between the first introduction member D1 inserted into the inner cavities 61H, 66H and the extension portion 6B is suppressed in the holder 1D. Therefore, the holder 1D can prevent the movement of the first introduction member D1 from being hindered by friction with the extension portion 6B.

[0119] <Special matters of the fourth embodiment> The inner cavity 66H and the slit 66S may not be provided in the gripping portion 6C. The gripping portion 6C may not be provided in the holder 1D. The user may operate the holder 1D by gripping the end portion on the second proximal end side of the extension portion 6B. The extension portion 6B may be connected to the second proximal end portion 60P of the base portion 6A and extend from the second proximal end portion 60P toward the second proximal end side. In this case, the inner cavity 62H may not be provided in the base portion 6A.

[0120] As shown in FIG. 20, the inner cavities 61H and 62H may be in contact with each other. In this case, the inner cavity 61H and the extending portion 6B inserted into the inner cavity 62H may be in contact with each other. That is, the first projection region and the second projection region may be in contact with each other in a direction orthogonal to the second extending direction. In this case, the first introducing member D1 inserted into the inner cavity 61H and the extending portion 6B can be brought close to each other. Therefore, the holder 1D can make the gap between the slit 96S of the hemostatic valve 9D of the Y-connector 9 and the extending portion 6B and the first introducing member D1 smaller than when the inner cavities 61H and 62H are separated. For this reason, the holder 1D can suppress blood from flowing out from the gap between the slit 96S of the hemostatic valve 9D and the extending portion 6B and the first introducing member D1.

[0121] <Modification Example> The present invention is not limited to the above-described embodiments, and various modifications are possible. The specific matters described in each of the first to fourth embodiments can be appropriately applied to other embodiments. For example, instead of the ribs 25, 26, 85 of the holder 1A in the first embodiment, the ribs 31 to 33 of the holder 1B in the second embodiment may be used. Alternatively, for example, instead of the ribs 31 to 33 of the holder 1B in the second embodiment, the ribs 25, 26, 85 of the holder 1A in the first embodiment may be used. The groove 34 in the second embodiment may be provided in the holder 1A in the first embodiment.

[0122] The introduction assisting tool to which the holders 1A to 1D are applied is not limited to the Y-connector 9, and can also be applied to various well-known sheaths. The catheter, guide wire, and guide extension shaft cited as specific examples of the introducing member are just examples, and the holders 1A to 1D may be used to introduce other introducing members.

[0123] <Others> The ribs 25, 26, 85, 31 to 33, and the side surfaces 58, 68 are examples of the "fixing portion" of the present invention. The slits 2S, 5S, 61S are examples of the "communication portion" of the present invention.

Explanation of Reference Numerals

[0124] 1, 1A, 1B, 1C, 1D: Hold the tool 2, 5, 6A: Base 2H, 5H, 50H, 61H: Inner cavity 2S, 5S, 61S: Slit 6B: Extension 9: Y Connector 20D, 50D, 60D, 90D: First tip 20P, 50P, 60P, 90P: First base end 25, 26, 31, 32, 33: Rib 27: Protrusion 34: Groove

Claims

1. A holder that is attached and used from the side of the first base end portion to the through portion of an introduction assist tool having a through portion that penetrates in a first extending direction between a first tip end portion and a first base end portion, having a base portion that extends in a second extending direction between a second tip end portion and a second base end portion, with the base portion attached to the through portion of the introduction assist tool, wherein the second extending direction extends along the first extending direction, the distance between the first tip end portion and the second tip end portion is shorter than the distance between the first tip end portion and the second base end portion, the base portion has, a lumen that extends from the second tip end portion along the second extending direction toward the second base end portion and movably holds a first introduction member among a plurality of introduction members to be introduced into a living body in the second extending direction, and a fixing portion provided on a part of a side surface opposite to the through portion in a state where the holder is attached to the through portion of the introduction assist tool, is formed, the fixing portion, clamps and immobilizes a second introduction member different from the first introduction member among the plurality of introduction members between the through portion, characterized in that it is a holder.

2. The base portion, characterized in that it has a communication portion that communicates the space inside the lumen and the space outside the side surface over the entire area in the second extending direction of the lumen, as described in Claim 1.

3. The base portion is elastically deformable, characterized in that the shape of the communication portion deforms when the base portion elastically deforms, as described in Claim 2.

4. The communication portion is a slit extending along the second extending direction, characterized in that it is a holder as described in Claim 2.

5. The width of the slit is smaller than the diameter of the lumen, characterized in that it is a holder as described in Claim 4.

6. Characterized in that it is provided on at least one of a pair of wall portions forming the slit and has a protruding portion protruding toward the inside in the width direction of the slit, as described in Claim 4.

7. The fixing portion, has one or a plurality of ribs extending in a circumferential direction centered on an imaginary axis extending along the second extending direction through the center of the base portion, the one or a plurality of ribs have rib surfaces on the outer side in the radial direction centered on the axis, characterized in that the radial distance between the rib surface and the axis is larger than the radial distance between the side surface and the axis, as described in Claim 1.

8. The retainer according to claim 7, characterized in that the distance between the shaft and the rib surface gradually increases from the side of the second distal end portion toward the side of the second proximal end portion.

9. The fixing portion has a plurality of ribs, The retainer according to claim 7, characterized in that the plurality of ribs are arranged in the second extending direction.

10. The retainer according to claim 9, characterized in that the radial distance between the rib surface of the rib closest to the second distal end portion among the plurality of ribs and the shaft is smaller than the radial distance between the rib surface of the rib closest to the second proximal end portion among the plurality of ribs and the shaft.

11. The retainer according to claim 9, characterized in that the width of the rib closest to the second distal end portion among the plurality of ribs in the second extending direction is smaller than the width of the rib closest to the second distal end portion among the plurality of ribs in the second extending direction.

12. The base portion, has a groove through which the second introduction member is inserted, The retainer according to claim 1, characterized in that the radial distance between the virtual axis extending along the second extending direction through the center of the base portion and the groove gradually decreases as it approaches the second distal end portion.

13. The end portion on the side of the second distal end portion of the inner cavity opens at the second distal end portion of the base portion, The end portion on the side of the second proximal end portion of the inner cavity opens at the side surface of the base portion The retainer according to claim 1, characterized in that.

14. The retainer according to claim 1, further comprising a rod-shaped extension portion provided at the second proximal end portion of the base portion and extending from the second proximal end portion to the side opposite to the second distal end portion.

15. The retainer according to claim 14, characterized in that the area of the portion surrounded by the outer edge in the cross section of the base portion orthogonal to the second extending direction is larger than the area of the portion surrounded by the outer edge in the cross section of the extension portion orthogonal to the second extending direction.

16. The retainer according to claim 14, characterized in that the first projection region obtained by projecting the inner cavity onto a plane orthogonal to the second extending direction and the second projection region obtained by projecting the extension portion onto a plane orthogonal to the second extending direction are separated in a direction orthogonal to the second extending direction.

17. The first projection area obtained by projecting the inner cavity onto a plane orthogonal to the second extending direction and the second projection area obtained by projecting the extending portion onto a plane orthogonal to the second extending direction are in contact with each other in a direction orthogonal to the second extending direction. The holder according to claim 14, characterized in that.

Images