JPH11267226A - Connector for catheter, and balloon catheter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve portability and operability during usage within a clean area by forming a recessed housing for freely attachably and detachably mounting a part of a catheter and/or a part of a catheter attachment. SOLUTION: One semicircular wing part of a disk-like hub 54 of a connector 50 is formed elastically deformable, and for example, about three lines of the recessed housings 58 are formed as pleat-like projections 56 along the longitudinal direction A of a connector body 52. The apexes of the projections 56 are made thick and the nearly center parts 57 of the direction A are formed thicker. Swelling parts 59 are formed at a hub 54 at positions corresponding to the parts 57. Thus, in a state where external force is not operated, housing grooves 58 on both sides of the projections 56 are set to increase their groove widths towards their bottoms, to be wider than the outside diameter of a guide wire 42 and to be larger than the outside diameter of the protection tube of a balloon catheter. Thus, the wire 42 at the time of usage can temporarily be fixed and before using, the protection tube is held by curving spirally to facilitate carrying.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector for a catheter and a balloon catheter, and more particularly, to improve portability by accommodating a part of the catheter in a receiving recess of the connector in a detachable manner. The present invention relates to a catheter connector and a balloon catheter, which can enhance operability during use by removably housing a proximal end portion of a guide wire used for a so-called monorail type balloon catheter.

[0002]

2. Description of the Related Art In recent years, medical technology has tended to move toward minimally invasive treatment. For example, stenosis of the coronary arteries is increasingly being treated with a vasodilating balloon catheter, replacing previous coronary artery bypass surgery. This method of treatment is becoming increasingly applicable in order to greatly reduce the burden on the patient, together with its economic advantages.
At the same time, there is a need for a more efficient and simple structure of a balloon catheter used for simple dilation of coronary stenosis.

[0003] In order to treat a stenosis in a blood vessel, the stenosis is inserted into the blood vessel, the balloon is inflated to expand the stenosis, and the blood flow on the peripheral side of the stenosis is improved.
As a so-called PTCA balloon catheter, there are an over-the-wire balloon catheter and a monorail balloon catheter. In any of these types of balloon catheters, a guide wire is first passed through the stenosis in the blood vessel, and then the balloon catheter is sent to the stenosis along the guide wire, and the balloon is inflated to inflate the stenosis. To expand. At that time, the dilation of the stenosis needs to be performed stepwise so as not to damage the blood vessel, and at first, insert a balloon catheter with a balloon part with a small outer diameter along the guide wire,
The balloon catheter is sequentially replaced with a balloon catheter having a larger outer diameter balloon portion.

In an over-the-wire balloon catheter, a guide wire lumen is formed over the entire length of a catheter tube, a guide wire is inserted through the lumen, and a balloon portion is formed along the guide wire. Guide to the stenosis. Then, after performing a blood vessel dilation with a balloon catheter having a balloon portion having a smaller outer diameter, the balloon catheter is replaced with a balloon catheter having a balloon portion having a larger outer diameter. At this time, since the balloon catheter is withdrawn along the guide wire, it is necessary that the proximal end of the guide wire extends outside the body for more than the entire length of the catheter tube. Otherwise, the balloon catheter cannot be replaced while leaving the distal end of the guidewire in the stenosis.

On the other hand, for example, Japanese Patent Application Laid-Open No. Sho 63-28
In the monorail type balloon catheter disclosed in Japanese Patent No. 8167, an opening is formed in the middle of the catheter tube, and the opening is guided to a distal end of the balloon through a guide wire insertion lumen. Therefore, in this type of balloon catheter, the length of the guide wire extending outside the body for replacement of the balloon catheter may be slightly longer than the length corresponding to the length from the opening to the distal end of the balloon. , Compared to other systems. Therefore, the operability is excellent.

[0006]

However, in such a monorail type balloon catheter, at the proximal end side of the balloon catheter which is exposed outside the body during use, a guide wire is provided separately from the connector of the balloon catheter. The distal end extends outside the patient's body, and the proximal end of the guidewire fluctuates, which poses a problem that it is difficult to operate the balloon catheter satisfactorily.

Before using a balloon catheter,
An elongated catheter tube is difficult to carry due to wobbling, and has a problem in carrying characteristics.

[0008] The latter problem is particularly encountered in balloon catheters and other catheters other than the monorail type.
As well.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and has improved portability by accommodating a part of a catheter in a receiving recess of a connector in a detachable manner, and is used for a so-called monorail type balloon catheter. It is an object of the present invention to provide a catheter connector and a balloon catheter that can enhance operability during use in a clean area by removably accommodating a proximal end portion of a guide wire to be used.

[0010]

In order to achieve the above object, a catheter connector according to the present invention is a catheter connector provided at a proximal end of a catheter to be inserted into a body, the catheter connector comprising: It is characterized in that a receiving recess is formed in which a part of the catheter and / or a part of the accessory of the catheter is detachably mounted.

In the present invention, it is preferable that the catheter connector has a disk shape as a whole.

It is preferable that the accommodating recess is a plurality of rows of accommodating grooves substantially parallel to each other along a longitudinal direction of the connector body.

The housing groove is formed in an elastically deformable portion of the catheter connector, and the elastically deformable portion is elastically deformed by an external force, so that the groove width of the housing groove is widened. Preferably, there is.

Alternatively, the accommodating groove constituting the accommodating recess is formed between a plurality of flexibly deformable flexible pieces integrally formed with a hub constituting the catheter connector. In order to integrally mold the hub,
Preferably, a cast hole is formed.

Alternatively, in the catheter connector,
The fastening member is movably and / or detachably mounted, and the accommodation groove is formed in an elastically deformable portion of the catheter connector, and the elastically deformable portion is elastically deformed by the fastening member. Thus, the groove width of the housing groove may be reduced.

In the present invention, the accommodating recesses include:
The storage space is not limited to the above-described groove, and may be an openable and closable storage space that penetrates in a substantially parallel direction along the longitudinal direction of the connector main body. Such an openable / closable storage space is preferably formed between at least a pair of gripping pieces formed integrally with the catheter connector. It is preferable that the gripping pieces are elastically deformed so as to bend and open in a direction in which the gripping pieces are separated from each other in a state where the gripping pieces are disengaged from the hook members, so that the accommodation space is opened.
It is preferable that the hook member is rotatably and / or detachably attached to the catheter connector.

[0017] A plurality of the accommodating spaces may be formed for a single catheter connector. Further, the gripping piece is elastically deformed at its base end, and is configured to open in a direction in which the gripping pieces are separated from each other in a state in which the gripping piece is disengaged from the insertion member or the cover member, thereby opening the housing space. Is also good. The insertion member or the cover member is slidably movable and / or relative to the catheter connector.
Alternatively, it is preferable to be detachably mounted.

The housing space is formed between a fixed plate portion (preferably integrally formed with the connector) fixed to the catheter connector and a movable plate portion rotatable with respect to the catheter connector. The housing space may be opened and closed by rotating the movable plate portion with respect to the fixed plate portion. A groove substantially parallel to the longitudinal direction of the connector main body may be formed on the opposed surface of the fixed plate portion and / or the movable plate portion.

The openable and closable storage space is provided between a fixed portion (preferably integrally formed with the connector) fixed to the catheter connector and a movable portion rotatable with respect to the catheter connector. The housing space may be made openable and closable by rotating the movable part with respect to the fixed part. A groove may be formed in a part of the fixed part and / or the movable part.

The catheter connector may be formed integrally with the tubular member constituting the proximal end of the catheter, or may be formed separately and mounted on the outer periphery of the tubular molded body. Is also good.

In the present invention, the part of the catheter detachably mounted in the accommodation recess is, for example, an axial part of a spirally bent catheter. In addition, the part of the accessory part of the catheter that is detachably attached to the accommodation recess is, for example, an axial part of a protective tube that covers the outer periphery of the spirally bent catheter. Or, for example, at the proximal end of a guidewire used in the use of a catheter.

A balloon catheter according to the present invention is inserted into a body cavity such as a blood vessel, and has a catheter tube in which at least two first and second lumens are formed along a longitudinal direction, and a distal end of the catheter tube. A balloon portion connected to the outer periphery of the distal end portion, which communicates with a second lumen formed in the catheter tube and which can be inflated outward by a fluid sent through the second lumen; An opening communicating with the first lumen is formed on the outer periphery of the catheter tube at a predetermined distance from the portion where the proximal end of the balloon portion is joined to the outer periphery of the catheter tube toward the proximal end side, A balloon catheter having a distal end of a guidewire inserted into the first lumen through the opening, the catheter being provided at a proximal end of the catheter tube. The connector, characterized in that the housing recess proximal end of the guide wire is protruding the proximal end side from the opening portion is detachably mounted is is formed.

[0023]

In the catheter connector according to the present invention, when the elongated catheter attached to the connector is not used before packing or carrying the catheter, the elongated catheter is, for example, spirally wound. At the position where the connector is bent and overlapped with the connector, a part of the catheter in the axial direction is detachably mounted in the receiving recess of the connector. As a result, the elongated catheter is spirally bent and temporarily fixed to the connector, so that the catheter does not come loose. Therefore, the portability of the catheter is reduced, the amount of packaging material for the catheter is reduced, and the packaging is facilitated.

Prior to use of the elongated catheter, the outer periphery of the catheter is preferably covered with a protective tube, and a storage solution such as saline is sealed inside the protective tube immediately before use. Preferably. In such a case, for example, a protective tube that covers the outer periphery of the elongated catheter that is bent several times in a spiral shape is detachably mounted in the receiving recess of the connector at a position overlapping the connector.

In the balloon catheter according to the present invention, during use, the guide wire protrudes from the opening (located in the body) formed at the distal end side of the catheter tube to the proximal end side. Can be removably mounted and temporarily fixed in a receiving recess formed in the catheter connector located outside the body. Therefore, in the balloon catheter according to the present invention, the proximal end of the guide wire extending outside the patient separately from the connector of the balloon catheter does not fluctuate, and the operability of the balloon catheter is improved.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments shown in the drawings.

First Embodiment FIG. 1 is a perspective view of a main part of a catheter connector according to an embodiment of the present invention, FIG. 2A is a plan view of the catheter connector shown in FIG. 1, and FIG. IIB in FIG.
3A and 3B are cross-sectional views showing a use state of the catheter connector according to the embodiment, and FIG. 3C is a cross-sectional view showing a modified example of the catheter connector. FIG. 4 is a perspective view showing a state before use of the balloon catheter according to one embodiment of the present invention, FIG. 5A is a sectional view of a main part of the balloon catheter according to the embodiment, and FIG. FIG. 6 is a sectional view of an essential part taken along line VB-VB in FIG.
FIG. 7 is a schematic view showing a use state of a balloon catheter, and FIG.
(A)-(C) is principal part sectional drawing which shows the use condition of a balloon catheter.

The catheter connector 50 according to one embodiment of the present invention shown in FIG. 1 is a proximal end portion of the balloon catheter 2 shown in FIG. 5A (a proximal end portion arranged outside the patient's body). It is attached to.

The balloon catheter 2 according to the present embodiment shown in FIG. 5A is, for example, a percutaneous coronary angioplasty (PT).
CA), dilation of blood vessels such as limbs, dilation of the upper ureter, renal vasodilation, and the like, and are used to dilate a stenosis formed in a blood vessel or other body cavity. In the following description, a case where the balloon catheter 2 of the present embodiment is used for PTCA will be described as an example.

The balloon catheter 2 for expansion according to the present embodiment
Is a so-called monorail type balloon catheter, which includes a balloon section 4, a catheter tube 6, and a connector 50.
And The proximal end 5 and the distal end 7 of the balloon portion 4 are connected to the outer periphery of the distal end of the catheter tube 6,
The internal space of the balloon part 4 is a sealed space. A connector 50 is connected to the proximal end of the catheter tube 6.

The connection between the proximal end portion 5 and the distal end portion 7 of the balloon portion 4 and the outer periphery of the distal end portion of the catheter tube 6 and the connection between the catheter tube 6 and the connector 50 are performed by heat sealing or bonding. Is performed by the joining means.

The balloon portion 4 is formed of a cylindrical film having both ends reduced in diameter, and the thickness thereof is not particularly limited.
It is 5 to 500 μm, preferably 10 to 60 μm. The balloon portion 4 is not particularly limited as long as it is cylindrical, and may have a cylindrical or polygonal cylindrical shape. In addition, the balloon portion 4 when inflated
Is determined by factors such as the inner diameter of a blood vessel, and is usually about 1.5 to 10.0 mm, preferably 2 to 5 mm.
Is preferred. The axial length of the balloon portion 4 is determined by factors such as the size of the intravascular stenosis, and is not particularly limited, but is 15 to 50 mm, preferably 20 to 40 m.
m. Before inflation, the balloon portion 4 is folded and wrapped around the distal end of the catheter tube 6 so that the outer diameter is as small as possible.

The material constituting the balloon portion 4 is preferably a material having a certain degree of flexibility. For example, ethylene and other α-olefins such as polyethylene, polyethylene terephthalate, polypropylene and ethylene-propylene copolymer can be used. Copolymer, ethylene-vinyl acetate copolymer, polyvinyl chloride (PVC), cross-linked ethylene-vinyl acetate copolymer, polyurethane, polyamide,
Polyamide elastomer, polyimide, polyimide elastomer, silicone rubber, latex rubber, and the like can be used, and preferred are polyethylene, polyethylene terephthalate, and polyamide.

The catheter tube 6 is, for example, a balloon section 4.
And may be made of polyethylene, polyamide, or polyimide. In the present embodiment, the outer cross-sectional shape of the catheter tube 6 is shown in FIG.
As shown in (B), the cross-section of the catheter tube 6 has an elliptical shape elongated in the Y-axis direction, the maximum cross-sectional width xm of the catheter tube in the X-axis direction perpendicular to the Y-axis, and the maximum cross-section in the Y-axis direction. The ratio (xm / ym) to the width ym is in the range of 0.8 to 0.1 and the two first lumens 12 and the second
The lumen 14 is formed separately along the Y-axis direction.

In this embodiment, in the cross section of the catheter tube 6, the maximum cross section width ym in the Y axis direction is 0.6 to 1.2.
mm is preferable. The first lumen 12 formed along the longitudinal direction of the catheter tube 6 is shown in FIG.
As shown in (B), this is a portion through which the guide wire 42 is inserted, and the inner diameter thereof is not particularly limited as long as the guide wire 42 can be inserted.
mm, preferably 0.25 to 0.6 mm. Also, the second
As shown in FIG. 5A, the lumen 14 passes through a communication hole 18 formed on the outer periphery of the distal end of the catheter tube 6.
The pressure fluid is sent to the inside of the balloon portion 4 to inflate the balloon portion 4. The inside diameter of the portion is the first lumen 1
It is almost the same as the inside diameter of the second. Note that the outer cross-sectional shape of the catheter tube 6 does not change along the longitudinal direction of the catheter tube 6, and has substantially the same flexibility along the longitudinal direction.

As shown in FIG. 5A, the catheter tube 6
A first lumen 12 formed along the longitudinal direction of the balloon portion 4 communicates with the outside through the opening 10 at a position separated from the proximal end portion 5 of the balloon portion 4 by a predetermined distance z, and the guide wire 42 therefrom. Can be inserted through the distal end side of the first lumen 12. The predetermined distance z is not particularly limited, but is preferably 0 to 500 mm, preferably 50 to 350 mm. If this distance z is too large, by using a monorail balloon catheter,
The effect of reducing the length of the guide wire 42 extending outside the body is reduced.

The first lumen 12 located on the proximal side of the opening 10 is filled with a plug material 11, and a guide wire lumen 15 formed on the distal end side of the first lumen 12 is provided with a first lumen 12. It does not communicate with a sealed lumen 17 formed on the proximal end side of the one lumen 12. A reinforcing member such as a reinforcing wire may be inserted into the sealing lumen 17, in which case the pushability of the proximal end side of the catheter tube is improved. The distal end 20 of the guidewire lumen 15 is open to the outside so that a guidewire 42 can be inserted therethrough.

As shown in FIG. 5A, the proximal end of the sealed lumen 17 on the proximal end side of the first lumen is closed by a connector 50. In contrast, the proximal end of the second lumen 14 communicates with an expansion port 16 formed in the connector 50 from which pressure fluid is introduced and folded around the distal end of the catheter tube 6. The balloon section 4 is inflated. A luer portion 62 for connecting to another tube or device is formed on the outer periphery of the expansion port 16. In addition, the communication hole 18 formed in the outer periphery of the distal end portion of the catheter tube 6 may be plural or single.

The second lumen 14 through the expansion port 16
The pressure fluid introduced into the inside is not particularly limited, but may be, for example, 50% of a radiopaque medium and saline.
/ 50 mixed aqueous solution or the like is used. The inclusion of the radiopaque medium during the use of the balloon catheter 2
This is for imaging the positions of the balloon portion 4 and the catheter tube 6 using radiation. The pressure of the pressure fluid for inflating the balloon portion 4 is not particularly limited, but may be 3 in absolute pressure.
-30 atm, preferably about 4-8 atm. Second
The distal end of the second lumen is filled with a plug 13 to prevent fluid delivered through the lumen 14 from leaking into the blood vessel. Plugs 11 and 13 shown in FIG. 5 are made of, for example, strands made of synthetic resin or an adhesive.

In this embodiment, as shown in FIG. 1, the connector 50 shown in FIG. 5A is attached to a tubular connector main body 52 and an outer periphery of the connector main body 52 at a substantially central portion in the axial direction. And a disc-shaped hub 54. As shown in FIG. 5A, a flow path communicating with the second lumen 14 of the catheter tube 6 is formed inside the connector main body 52, and the device is connected to the luer portion 62 through the expansion port 16. The fluid pressure can be introduced from. The connector body 52 is made of, for example, polycarbonate, polyamide,
It is suitably molded with a thermoplastic resin such as polysulfone, polyacrylate, methacrylate-butylene-styrene copolymer. The outer diameter of the tubular connector body 52 is not particularly limited, but is preferably about 3 to 20 mm, and more preferably about 5 to 15 mm at the maximum outer diameter portion.

The outer diameter of the disk of the hub 54 is not particularly limited, but is preferably 10 to 100 mm, particularly preferably 1 to 100 mm.
It is about 5 to 50 mm. The dimensions are determined in consideration of the ease of holding with one hand. In the present embodiment, the hub 5
4 is provided on the outer periphery of a substantially central portion of the connector body 52 in the axial direction,
It is fixed by means such as adhesion or heat fusion. Alternatively, the hub 54 may be detachably attached to the outer periphery of the substantially central portion in the axial direction of the connector main body 52 along the axial direction. Alternatively, the hub 54 may be formed integrally with the connector body 52.

When the hub 54 is formed integrally with the connector 52, the material of the hub 54 is the same as the material of the connector 52. However, when the hub 54 is formed separately, a material different from the material of the connector body 52 is used. Can also be configured. As will be described later, at least a part of the hub 54 needs to be elastically deformed. Therefore, it is preferable that the hub 54 be made of a material having higher elasticity than the connector main body 52. A preferable material for the hub 54 is not particularly limited, and examples thereof include polyethylene, polypropylene, polycarbonate, nylon, and ABS resin.

In this embodiment, as shown in FIGS. 1 and 2, one semicircular wing of the disc-shaped hub 54 is formed so as to be elastically deformable, and three rows are formed on both sides of the fold-shaped projection 56. Are formed substantially parallel to each other along the longitudinal direction A of the connector body 52. As shown in FIGS. 1 to 3, the cross-section of the fold-like projection 56 is formed thick at the top of the ridge-like projection. Molded to be meat.
A substantially central portion 57 in the longitudinal direction A of these fold-shaped projections 56 is provided.
A bulge 59 is formed in the hub 54 at a position corresponding to.

For this reason, as shown in FIG. 3A, the groove width of the accommodation groove 58 formed on both sides of the fold-shaped projection 56 becomes wider toward the bottom when no external force is applied. The groove width of the accommodation groove 58 is wider than the outer diameter of the guide wire 42 at the widest part (bottom part), and preferably, the outer diameter of the protective tube 64 shown in FIG. 4 that covers the outer periphery of the balloon catheter 2 shown in FIG. The groove width is about the same as or larger. At the bottom of the accommodation groove 58,
When using the balloon catheter 2 shown in FIG.
As shown in FIG. 3, the proximal end of the guide wire 42 is removably inserted along the longitudinal direction A of the groove and temporarily fixed. In the state before use of the balloon catheter 2 shown in FIG. 5, as shown in FIG. 4, a part of the protection tube 64 covering the outer periphery of the spirally bent balloon catheter 2 is removably inserted. Is temporarily fixed.

As shown in FIGS. 1 and 3A and 3B, the end of the wing piece of the disc-shaped hub 54 on the side where the accommodation groove 58 and the fold-shaped projection 57 are formed is provided. A substantially parallel flange 60 is formed on the upper surface.
By applying a pressing force P1 downward with a finger or the like, the wings of the disc-shaped hub 54 are elastically deformed, the groove width of the upper opening of the accommodation groove 58 is widened, and the guide wire 42 and the protection tube 64 shown in FIG. It is easily removable.

Note that, without forming the flange 60 at the end of the wing piece of the disc-shaped hub 54a, as shown in FIG. 3C, the connector 50 is attached to the end of both wing pieces of the disc-shaped hub 54a.
The grip pieces 60a protruding in a direction substantially perpendicular to the back surface of the hub 54a may be integrally formed. The two gripping pieces 60
When the pressing force P2 is applied from both sides with fingers, the wings of the disc-shaped hub 54 are elastically deformed, the groove width of the upper opening of the accommodation groove 58 is widened, and the guide wire 42 and the protection tube 64 shown in FIG. It can be easily attached and detached. FIG.
In the connector 50a shown in FIG.
Is formed integrally with the disc-shaped hub 54a. Further, in the above-described embodiment, the accommodation grooves 58 are formed in three rows, but from the viewpoint of operability, usually two rows are preferable.

Next, a method of performing PTCA treatment using the balloon catheter 2 of the embodiment shown in FIG. 5 will be described.

In a state before use, the balloon section 4 of the balloon catheter 2 shown in FIG. 5 is contracted and folded around the catheter tube 6. In addition, guide wire 4
2 is not inserted in the guide wire lumen 15 and is packaged separately from the balloon catheter 2. Moreover, the catheter tube 6 in which the balloon portion 4 is folded,
As shown in FIG. 4, the protective tube 64 is inserted into a protective tube 64, and the protective tube 64 is filled with a protective solution such as saline to protect the balloon catheter 2 from dirt and dust. ing. Particularly, in this embodiment, the connector 50 attached to the proximal end of the balloon catheter 2
On one wing of the disc-shaped hub 54, three rows of accommodation grooves 58 are formed. Therefore, a part of the protection tube 64 wound spirally in the housing groove 58 in the axial direction can be detachably inserted and temporarily fixed at a position overlapping the housing groove 58 of the connector 50. . As a result, the protection tube 64 into which the elongated catheter 2 is inserted is bent in a spiral shape and temporarily fixed to the connector, so that the protection tube 64 is not separated. Therefore, while being easy to carry, the packaging material of the balloon catheter 2 can be reduced, and packaging becomes easy.

When using the balloon catheter 2,
First, the balloon catheter 2 is taken out of the protection tube 64, and air in the balloon catheter 2 is removed as much as possible. Therefore, suction / injection means such as a syringe is attached to the expansion port 16 of the connector 50 shown in FIG.
A liquid such as a blood contrast agent (for example, containing iodine) is put into the syringe, and suction and injection are repeated to replace the air in the second lumen 14 and the balloon 4 with the liquid.

In order to insert the balloon catheter 2 into an arterial blood vessel, first, a guide wire for a guide catheter (not shown) is inserted into the blood vessel by the Seldinger method or the like so that the distal end thereof reaches, for example, near the heart. I do. Then, along the guide wire for the guide catheter, FIG.
Is inserted into the arterial blood vessel 34 and the distal end thereof is positioned at the coronary artery entrance 40 of the heart 38 having the stenosis 36. The stenosis part 36 is formed by, for example, thrombus or arteriosclerosis.

Next, only the guide wire for the guide catheter is pulled out, a guide wire 42 for the balloon catheter thinner than that is inserted along the guide catheter 32, and the distal end thereof is inserted to a position where it passes through the stenosis portion 36.

Thereafter, the distal end of the guide wire 42 is inserted into the distal open end 20 of the balloon catheter 2 shown in FIG. 5, and passed through the guide wire lumen 15 on the distal end side of the first lumen 12, Pull out from the opening 10. Then, with the balloon section 4 folded, the balloon catheter 2 is passed through the guide catheter 32 shown in FIG. Then, as shown in FIG. 6, the balloon portion 4 of the balloon catheter 2 is inserted to a position just before the stenosis portion 36.

Thereafter, as shown in FIGS. 7A and 7B, the folded balloon portion 4 of the balloon catheter 2 is inserted between the narrowed portions 36 along the guide wire 42.

Next, as shown in FIG. 7C, the balloon portion 4 is accurately positioned at the center of the stenosis portion 36 while observing the position of the balloon portion 4 with an X-ray fluoroscope or the like. By inflating the balloon portion 4 at that position, the stenotic portion 36 of the blood vessel 32 can be widened, and good treatment can be performed. The balloon section 4 is inflated by injecting a liquid into the balloon section 4 from the inflation port 16 shown in FIG.

The expansion time is not particularly limited, but is, for example, about 1 minute. Thereafter, the liquid is quickly drained from the balloon portion 4 to deflate the balloon portion, thereby securing the blood flow on the peripheral side of the dilated stenosis portion 36. The expansion of the stenosis part 36 must be performed stepwise so as not to damage the blood vessel 34. First, the balloon catheter 2 having the balloon part 4 with a small outer diameter is inserted along the guide wire 42, and then the balloon catheter 2 is sequentially enlarged. The balloon catheter 2 having a balloon portion 4 having a diameter is exchanged. At this time, since the balloon catheter 2 according to the present embodiment is a monorail type balloon catheter, the proximal end portion of the guide wire 42 is slightly longer than a portion corresponding to the length of the guide wire lumen 15. The balloon catheter can be replaced simply by extending the outside of the body.

In such an operation, the catheter tube 6
The proximal end (located outside the body) of the guide wire 42 protruding to the proximal end side from the opening 10 (located inside the body) formed on the distal end side as shown in FIG. It can be removably mounted in any of the receiving grooves 58 formed in the catheter connector 50 located outside the body and temporarily fixed. In this case, the proximal end of the guide wire 42 is freely movable along the longitudinal direction of the accommodation groove 58. Accordingly, in the balloon catheter 2 according to the present embodiment, the proximal end of the guide wire 42 extending outside the patient separately from the connector 50 of the balloon catheter 2 does not fluctuate, and the balloon catheter 2
Operability is improved.

In the balloon catheter 2 having the catheter tube 6 according to the present embodiment, the cross-sectional outer shape of the catheter tube 6 has an elongated shape in the Y-axis direction as shown in FIG. Since the two lumens 12 and 14 are formed along the axial direction, the outer diameter in the X-axis direction perpendicular to the Y-axis can be reduced, and the wasted thick portion in the X-axis direction in the cross section of the catheter tube. Can be eliminated.
For this reason, the flexibility of the catheter tube is significantly improved, especially in the X-axis direction.

Furthermore, in the present embodiment, the flexibility is not increased by using an extremely flexible material, but the flexibility is increased by devising the cross-sectional shape of the catheter tube 6. A certain degree of axial rigidity can be maintained. As a result, the pushability (strength of the waist /
The pushability of the catheter tube 6 is small, and the insertability and followability of the catheter tube 6 into a bent blood vessel or the like are improved. Further, in the present embodiment, the sealed lumen 1 located at the proximal end side of the first lumen 12 formed in the catheter tube.
Since a reinforcing member such as a reinforcing wire can be inserted into the inside of the catheter tube 7, the pushability of the proximal end side of the catheter tube 6 is further improved.

Since the catheter tube 6 of the present embodiment has uniform flexibility in the axial direction and does not connect different kinds of materials, a sudden change in the hardness of the catheter tube 6 along the longitudinal direction thereof is prevented. No operability. In addition, since a connecting step is not required for manufacturing the catheter tube 6, the catheter tube 6 can be manufactured extremely easily by extrusion molding or the like.

Further, the balloon catheter 2 according to the present embodiment is inserted into the guiding catheter 32 shown in FIG. 6 and guided to a target position. In this case, the following operation is achieved. That is, since the cross section of the catheter tube 6 according to the present embodiment is non-circular, the gap between the inside of the guiding catheter 32 and the inner wall of the guiding catheter 32 can be increased. As a result, when the X-ray contrast agent is injected through the gap, the flow path resistance is reduced, and the effect of facilitating the injection of the contrast agent is also exerted.

Second Embodiment FIG. 8 (A) is a perspective view of a balloon catheter connector according to another embodiment of the present invention, and FIGS. 8 (B) and 8 (C) are cross-sectional views of main parts of the connector. The connector 50b of the present embodiment shown in FIG. 8A is a modified example of the connector 50 of the first embodiment. Only the configuration of the hub 54b is different, and the configuration of the other parts is the same. Description of overlapping parts will be omitted, and only different parts will be described.

The hub 54b of this embodiment has a disk shape as a whole, has a fixing piece 65 and a fastening piece 66, and only the fixing piece 65 is fixed to the outer periphery of the tubular connector body 52. is there. The fastening piece 66 is rotatably mounted on the outer periphery of the connector main body 52 in a direction r around the axis, and the fixing piece 65 is elastically deformable inside an opening 67 formed in the fastening piece 66. The wing pieces are detachably housed.

Three rows of receiving grooves 58 and two rows of fold-like projections 5
6 is integrally formed on one side of the elastically deformable wing of the fixed piece 65, and in a state where no external force is applied, as shown in FIG. It has been molded. An engagement groove 68 is formed in the end wall of the fixed piece 65 where the accommodation groove 58 is formed. An inner convex portion 70 formed on the inner wall surface of the opening 67 of the fastening piece 66 is detachably engaged with the engagement groove 68.

At the rotation position where the upper surface of the fastening piece 66 is substantially parallel to the upper surface of the fixing piece 65, as shown in FIG.
The inwardly protruding portion 70 of the fastening piece 66 engages with the engagement groove 68 to elastically deform the wing of the fixed piece 65, thereby reducing the width of the upper opening of the accommodation groove 58.

The balloon catheter connector 50b according to this embodiment has a mechanism for increasing the width of the upper opening of the accommodation groove 58 when the guide wire 42 (see FIG. 1) and the like are attached to and detached from the accommodation groove 58. However, only the connector 50 is different from the connector 50 of the first embodiment, and other structures and operations are the same. In the connector 50b of the present embodiment, the housing groove 58 formed in the hub 54b is formed by injection molding or another molding method in a state where the upper opening is wide open (FIG. 8C). Therefore, the die removing operation at the time of molding is easy.

Third Embodiment FIG. 9A is a perspective view of a balloon catheter connector according to another embodiment of the present invention, and FIGS. 9B and 9C are cross-sectional views of a main part of the connector. The connector 50c of the present embodiment shown in FIG. 9A is a modified example of the connector 50 of the first embodiment. Only the configuration of the hub 54c is different, and the configuration of the other parts is the same. Description of overlapping parts will be omitted, and only different parts will be described.

The hub 54c of the present embodiment has a disk shape as a whole, and the fixed wing piece 71 constituting one semicircular portion is formed.
And a pair of gripping wing pieces 72 constituting the other semicircular portion, which are integrally formed. A pair of gripping wing pieces 72
9B branches off from the fixed wing piece 71 so as to sandwich the outer periphery of the connector body 52, and is elastically deformed to bend as shown in FIG. 72 open in the direction in which they are separated from each other to accommodate
58c is opened.

The hook member 74 is rotatably mounted on the wing end of one gripping wing piece 72 via a rotation shaft 75.
An engagement groove 78 formed at the wing end of the other gripping wing piece 72.
It has an engagement projection 76 which detachably engages with. On the wing end portion facing surfaces of the pair of gripping wing pieces 72 facing each other,
In the state where the inner protrusion 77 is formed and the engaging protrusion 76 of the hook member 74 is engaged with the engaging groove 78, the gripping wing pieces 72 are bent and elastically deformed, and as shown in FIG. As described above, the protrusions 77 approach each other to the maximum, and the width of the housing space 58c is reduced.

The housing space 58c formed between the gripping wing pieces 72, 72 penetrates in a direction substantially parallel to the longitudinal direction of the connector body 52, and
In the state where the engaging projections 76 of FIG. 4 are engaged with the engaging grooves 78, the gripping wing pieces 72 are bent and elastically deformed, and FIG.
As shown in FIG.
Etc. can be temporarily fixed.

In the balloon catheter connector 50c according to the present embodiment, a portion for temporarily fixing the guide wire 42 (see FIG. 1), the protection tube 64, and the like is formed not between the accommodation grooves but between the gripping wing pieces 72, 72. Storage space 58
The point c is only different from the connector 50 of the first embodiment, and the other structures and operations are the same.
The hub 54c of the connector 50c of the present embodiment has a simple shape, and is easily formed by injection molding or another molding method.

Fourth Embodiment FIG. 10A is a perspective view of a balloon catheter connector according to another embodiment of the present invention, and FIGS. 10B and 10C.
FIG. 2 is a sectional view of a main part of the connector. The connector 50d of the present embodiment shown in FIG. 10A is a modified example of the connector 50c of the third embodiment. Only the configuration of the hub 54d is different, and the configuration of the other parts is the same. Description of overlapping parts will be omitted, and only different parts will be described.

The hub 54d of this embodiment has a disk shape as a whole, and one semicircular wing of the hub 54d has
Three gripping blade pieces 72d are formed in the stacking direction, and two accommodation spaces 58d are formed between them. The accommodation space 58d penetrates along the longitudinal direction of the connector main body 52.

On the other semicircular wing portion of the hub 54d, two wing pieces 83, 83 are integrally formed so as to sandwich the outer periphery of the connector 52. Notches 81 are formed in these wing pieces 83, 83, and cylindrical insertion members 8 are provided here.
0 is detachably mounted, and a gap 8 between the wing pieces 83, 83 is provided.
4, a projection 82 formed on the peripheral wall surface of the insertion member 80 can be removably inserted.

The projection 82 of the insertion member 80 is
In the state inserted into the gap 84 between
0 (B), the wing pieces 8 extend in the direction in which the gap 84 widens.
3,83 are elastically deformed, so that these wing pieces 83,83
The plurality of gripping wing pieces 72d integrally formed with 83 are also elastically deformed, and narrow the width of the accommodation space 58d. Note that a stopper projection 77d is formed at the tip of the wing portion of each gripping wing piece 72d so that the width of each accommodation space 58d is not excessively reduced. The guide wire 42 shown in FIG. 1 and the protective tube 64 shown in FIG. 4 are inserted into these accommodation spaces 58d.

The guide wire 42 and the protective tube 6
When attaching and detaching 4, as shown in FIG. 10C, the insertion member 80 may be taken out from the notch 81 of the wing piece 83.

The balloon catheter connector 50d according to the present embodiment is different from the third embodiment in that a plurality of accommodation spaces 58d for temporarily fixing the guide wire 42 (see FIG. 1) and the protective tube 64 are formed. Only the structure is different from that of the connector 50c, and other structures and operations are the same. Note that the hub 54d of the connector 50d of the present embodiment.
Has a simple shape and is easily molded by injection molding or other molding methods.

Fifth Embodiment FIG. 11 (A) is a perspective view of a balloon catheter connector according to another embodiment of the present invention, and FIGS. 11 (B) and (C).
FIG. 2 is a sectional view of a main part of the connector. The connector 50e of the present embodiment shown in FIG. 11A is a modified example of the connector 50d of the fourth embodiment, only the configuration of the hub 54e is different, and the configuration of the other parts is the same. Description of overlapping parts will be omitted, and only different parts will be described.

The hub 54e of this embodiment has a disk shape as a whole, and one semicircular wing of the hub 54e has
Two gripping blade pieces 72e are formed in the stacking direction, and a single accommodating space 58e is formed therebetween. The accommodation space 58e penetrates along the longitudinal direction of the connector main body 52.

On the other semicircular wing portion of the hub 54e, two wing pieces 83e, 83e are integrally formed so as to sandwich the outer periphery of the connector 52. As shown in FIGS. 11A and 11B, a cap-shaped cover member 80e is detachably attached to the outer periphery of the wing pieces 83. The cover member 80e is integrally formed with a pair of pressing pieces 82e, 82e extending to the base end of the gripping wing piece 72e.

The cover member 80e is connected to the wing pieces 83e, 83
FIG. 11 shows a state in which e is sandwiched from outside.
As shown in (B), the base ends of the gripping wing pieces 72e, 72e are sandwiched between a pair of pressing pieces 82e, 82e extending to the base ends of the gripping wing pieces 72e, 72e.
Is elastically deformed. As a result, the width of the storage space 58e is reduced. Note that a stopper projection 77e is formed at the tip of the wing portion of each gripping wing piece 72e so that the width of each accommodation space 58e is not excessively reduced. These accommodation spaces 5
The guide wire 42 shown in FIG. 1 and the protective tube 64 shown in FIG. 4 are inserted into 8e.

The guide wire 42 and the protective tube 6
When attaching and detaching the cover 4, the cover member 80e may be removed from the wing pieces 83e, 83e as shown in FIG. By doing so, the gripping wing pieces 72e, 72e return to their original shapes and open the accommodation space 58e.

The balloon catheter connector 50e according to the present embodiment has a mechanism for opening and closing a storage space 58e for temporarily fixing the guide wire 42 (see FIG. 1), the protective tube 64, and the like, according to the connector of the fourth embodiment. It is different from 50d only, and the other structures and operations are the same. Note that the hub 54e of the connector 50e of the present embodiment.
Has a simple shape and is easily molded by injection molding or other molding methods.

Sixth Embodiment FIG. 12A is a perspective view of a balloon catheter connector according to another embodiment of the present invention, and FIGS.
FIG. 2 is a sectional view of a main part of the connector. The connector 50f of the present embodiment shown in FIG. 12A is a modified example of the connector 50e of the fifth embodiment. Only the configuration of the hub 54f is different, and the configuration of the other parts is the same. For the common members, the common member numbers are shown in the drawings, their description is partially omitted, and only different portions will be described.

In the hub 54f of the present embodiment, a pair of recesses 8 are formed on the inner wall surface facing the insertion hole of the cover member 80f.
8 are formed, and the wing pieces 83 are respectively formed in these depressions 88.
bulging portion 8 formed on the outer surface of the wing tip portion of f, 83f
6 are fitted. With this configuration, the wing piece 83f is completely inserted into the insertion hole of the cover member 80f, and the wing piece 83f is completely inserted.
The bulging portions 86 of f and 83f fit into the depressions 88 and 88, and the operator can feel a click feeling in his hand.

Seventh Embodiment FIG. 13A is a perspective view of a balloon catheter connector according to another embodiment of the present invention, and FIG. 13B is an exploded perspective view of the connector. The connector 50g of the present embodiment shown in FIG.
e, only the configuration of the hub 54g is different, and the configuration of the other parts is the same. For the common members, the common member numbers are shown in the drawings, and the description thereof is partially omitted. Only the differences will be described.

[0086] In the hub 54g of this embodiment, the hub 54g
The wings 83g, 83g formed on one side are shaped like a fan, and the upper surfaces of the wings 83g, 83g have different angles from each other. Further, projections 90, 90 are respectively formed inside the distal ends of the pair of pressing pieces 82g, 82g formed on the cover member 80g. Hub 54
On the other side of g, gripping wing pieces 72g, 72g are formed, and an accommodation space 58g is formed therebetween.

With the cover member 80g attached to the wing pieces 83g, 83g, the protrusions 9g of the pressing pieces 82g, 82g are formed.
0, 90 are inclined surfaces 92, formed on the outer surface of the gripping wing pieces 72g, 72g formed on the other side of the hub 54g.
92 is pressed. As a result, the width of the accommodation space 58g is reduced, and a part of the guide wire 42 shown in FIG. 1 and a part of the protection tube 64 shown in FIG. 4 are temporarily fixed thereto.

Eighth Embodiment FIG. 14A is a perspective view of a balloon catheter connector according to another embodiment of the present invention, FIG. 14B is a perspective view of the connector viewed from the back, and FIG. 3 is a perspective view showing a state in which a housing space formed in a hub of the connector is opened, FIG. 4D is a sectional view thereof, and FIG. 4E is a sectional view of a main part showing a state of operation.

The connector 50h of the present embodiment shown in FIG. 14A is a modification of the connector 50 of the first embodiment, except for the configuration of the hub 54h, and the other components are the same. Therefore, description of overlapping parts will be omitted, and only different parts will be described.

The hub 54h of the present embodiment has a disk shape as a whole, and is a semi-disk-shaped movable plate rotatably mounted on the disk-shaped fixed plate portion 71 and the fixed plate portion 94. And a plate portion 96, which are formed separately. The movable plate portion 96 is rotatable about the connector main body 52, and the fixed plate portion 94 is fixed to the connector main body 52, and a housing space 58h is provided between the plate portions 94 and 96. Is formed.

As shown in FIGS. 14A and 14C, three rows of mounting grooves 98 substantially parallel to the longitudinal direction of the connector body 52 are formed on the surface of the fixing plate 94 on the housing space side. The guide wire 4 shown in FIG.
2 and a part of the protective tube 64 shown in FIG. FIG. 14B,
As shown in (C), the fixed plate portion 94 has slits 100 that are substantially perpendicular to the three rows of mounting grooves 98.

When the housing space 58h is opened, the space shown in FIG.
As shown in FIG. 14E, the finger touches the distal end of the movable plate portion 96, and as shown in FIGS. 14C and 14D, the fixed plate portion 94.
May be rotated with respect to. When closing the housing space 58h, the reverse operation may be performed. At the base end of the movable plate 96, as shown in FIG. 14 (D), a protrusion 102 for stopper is formed to restrict the rotational movement of the movable plate 96 and open the housing space 58h. It is configured not to be too much.

Ninth Embodiment FIG. 15A is a perspective view of a balloon catheter connector according to another embodiment of the present invention, FIG. 15B is a plan view of the connector, and FIG. It is a top view showing the state where the space was opened.

The connector 50i of the present embodiment shown in FIG. 15A is a modification of the connector 50 of the first embodiment. Only the configuration of the hub 54i is different, and the configuration of the other parts is the same. Therefore, description of overlapping parts will be omitted, and only different parts will be described.

The hub 54i of the present embodiment is generally
A grip portion (fixing portion) 103 having a shape that can be easily gripped by one hand of an operator is provided. The grip portion 103 is fixed to the connector main body 52. A fixed plate portion (fixed portion) 94i is integrally formed with the grip portion 103,
A rotary knob (movable part) 96i is eccentrically and rotatably mounted on the fixed plate part 94i via a rotary shaft 106.

In this embodiment, an accommodation space 58i is formed between the rotary knob 96i and the side wall of the grip 103, and the rotary knob 96i, which rotates eccentrically, is fixed to the fixed plate 9
By rotating the housing space 58i with respect to the housing space 58i, the width of the housing space 58i is increased or decreased. That is, the rotary knob 96i has a projection 10
8 is formed, and an operation uneven portion 104 is formed at an outer peripheral position opposite to the projection 108, and a rotary knob 96i is rotatable with respect to the fixed plate portion 94i by a rotating shaft 106 near the operation uneven portion 104. Installing. With this configuration,
As shown in FIGS. 15A and 15B, the width of the housing space 58i is the smallest at the rotational position where the projection 108 faces the grip portion 103. In this state, the proximal end of the guide wire 42 shown in FIG. 1 can be temporarily fixed, or a part of the protective tube 64 shown in FIG. 4 can be temporarily fixed.

Further, the concave / convex portion 10 for operation of the rotary knob 96i is provided.
15 by rotating the rotary knob 96i with a finger.
As shown in (C), the width of the accommodation space 58i increases. In this state, the proximal end of the guide wire 42 shown in FIG. 1 can be attached or detached, or a part of the protective tube 64 shown in FIG. 4 can be attached or detached.

In the present embodiment, the guide wire 42 shown in FIG.
For example, a groove 98i may be formed for guiding the guide. Further, a groove 110 for guiding the guide wire 42 and the like shown in FIG.

Tenth Embodiment FIG. 16 is a perspective view of a balloon catheter connector according to another embodiment of the present invention, and FIG. 17 is an XVII-XV shown in FIG.
FIG. 18 is a plan view of a main part of the connector, and FIG. 19 is a perspective view showing an example of use of the connector.

A connector 50j of the present embodiment shown in FIG.
Is a modified example of the connector 50 of the first embodiment,
Only the configuration of the hub 54j is different, and the configuration of the other portions is the same. Therefore, description of overlapping portions will be omitted, and only different portions will be described.

The hub 54j of the present embodiment has a disk shape as a whole, and one semi-circular wing portion of the disk-shaped hub 54j is provided with one central flexible piece 56j as shown in FIGS. And 2 side flexible pieces 56j 'are formed,
Between these, two rows of accommodation grooves (recesses) 58j are formed. At least approximately the center 5 of the flexible pieces 56j, 56j '
7j, the bulging portion 12 which becomes thick at its top
6,126 'is molded. Side flexible piece 56j'56
Outside the j ′, a slit 128 that allows these flexible pieces 56j ′, 56j ′ to bend outward is formed in the accommodation groove 58j.
It is formed to contact.

The central flexible piece 56j having such a shape is used.
In order to form the side flexible pieces 56j 'of the first and second parts integrally with the hub 54j by injection molding or the like, cast holes 120, 120 are formed in the rear surface of the hub 54j. Further, on the back surface of the hub 54j, an uneven portion 122 is formed so as to be easily held by an operator's hand. The space indicated by reference numeral 124 in FIG. 17 is a hole for facilitating molding of the hub 54j.

The connector 50j for a balloon catheter according to the present embodiment, when a protective tube 64 or the like covering the outer periphery of the catheter 6 is attached to or detached from the accommodation groove 58j as shown in FIG. Unlike the connector 50 of the first embodiment, the mechanism for expanding the groove width does not require the hub 54j itself to be pressed and elastically deformed. That is, only by pushing the protection tube 64 shown in FIG. 19 or the guide wire 42 shown in FIG. 1 along the accommodation groove 58j, the flexible pieces 56j and 56j 'are bent and deformed and enter the accommodation groove 58j. At the top of the flexible pieces 56j, 56j 'at the central portion 57j of the flexible piece, the bulges 126, 1
Since the protective tube 26 'is formed, once the protective tube 64 shown in FIG. 19 and the guide wire 42 shown in FIG. 1 are inserted into the accommodation groove 58j, they do not come off unless intentionally removed. Other structures and operations are the same as those of the first embodiment.

The present invention is not limited to the above-described embodiments, but can be variously modified within the scope of the present invention.

For example, the catheter to which the catheter connector according to the present invention is connected is not limited to the monorail type PTCA catheter described above, but may be an over-the-wire type PTCA balloon catheter. Alternatively, another catheter may be used.

[0106]

As described above, according to the catheter connector of the present invention, it is easy to carry, the packaging material for the catheter can be reduced, and the packaging becomes easy.

Further, according to the catheter connector and the balloon catheter according to the present invention, the proximal end of the guide wire extending outside the body of the patient separately from the connector of the balloon catheter does not fluctuate, and the operation of the balloon catheter is prevented. The performance is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a catheter connector according to one embodiment of the present invention.

2 (A) is a plan view of the catheter connector shown in FIG. 1, and FIG. 2 (B) is IIB-II in FIG. 2 (A).
It is sectional drawing which follows the B line.

FIGS. 3A and 3B are cross-sectional views showing a usage state of the catheter connector according to the embodiment, and FIGS.
FIG. 4 is a cross-sectional view showing a modified example of the catheter connector.

FIG. 4 is a perspective view showing a state before use of the balloon catheter according to one embodiment of the present invention.

FIG. 5A is a cross-sectional view of a main part of the balloon catheter according to the embodiment, and FIG. 5B is VB-VB of FIG. 5A.
It is principal part sectional drawing along a line.

FIG. 6 is a schematic view showing a use state of the balloon catheter.

FIGS. 7A to 7C are main-portion cross-sectional views showing a use state of the balloon catheter.

FIG. 8A is a perspective view of a balloon catheter connector according to another embodiment of the present invention, and FIGS. 8B and 8C are cross-sectional views of a main part of the connector.

FIG. 9 (A) is a perspective view of a balloon catheter connector according to another embodiment of the present invention, and FIGS. 9 (B) and 9 (C) are cross-sectional views of main parts of the connector.

FIG. 10A is a perspective view of a balloon catheter connector according to another embodiment of the present invention, and FIG.
And (C) is a sectional view of a main part of the connector.

FIG. 11 (A) is a perspective view of a balloon catheter connector according to another embodiment of the present invention, and FIG. 11 (B).
And (C) is a sectional view of a main part of the connector.

FIG. 12A is a perspective view of a balloon catheter connector according to another embodiment of the present invention, and FIG.
And (C) is a sectional view of a main part of the connector.

FIG. 13 (A) is a perspective view of a balloon catheter connector according to another embodiment of the present invention, and FIG. 13 (B).
Is an exploded perspective view of the connector.

FIG. 14 (A) is a perspective view of a balloon catheter connector according to another embodiment of the present invention, and FIG. 14 (B).
Is a perspective view from the back of the connector, FIG. (C) is a perspective view showing a state where an accommodation space formed in the hub of the connector is opened, FIG. (D) is a cross-sectional view thereof, and FIG. FIG. 4 is a sectional view of a main part showing a state of operation.

FIG. 15A is a perspective view of a balloon catheter connector according to another embodiment of the present invention, and FIG.
FIG. 2 is a plan view of the connector, and FIG. 2C is a plan view showing a state where a housing space of the connector is opened.

FIG. 16 is a perspective view of a balloon catheter connector according to another embodiment of the present invention.

FIG. 17 is a cross-sectional view of a principal part along the line XVII-XVII shown in FIG. 16;

FIG. 18 is a plan view of a main part of the connector.

FIG. 19 is a perspective view showing an example of use of the connector.

[Explanation of symbols]

 2 Balloon catheter 4 Balloon section 6 Catheter tube 8 Connector 10 Opening 11, 13 Plug 12 First lumen 14 Second lumen 15 Guide lumen 17 Sealed lumen 32 Guide catheter 34 Blood vessel 36 stenosis 42 guide wire 50, 50a to 50j connector 52, 52a connector body 54, 54a to 54j hub 58 accommodation groove (accommodation recess) 58c, 58d to 58j accommodation space (accommodation recess) )

Claims (3)

[Claims] A catheter connector provided at a proximal end of a catheter to be inserted into a body, wherein a part of the catheter and / or a part of an accessory part of the catheter are detachably mounted. A connector for a catheter, wherein a receiving recess is formed. 2. The storage recess is formed between a plurality of flexibly deformable flexible pieces integrally formed on a hub constituting the catheter connector, and the flexible pieces are integrally formed. The catheter connector according to claim 1, wherein a cast hole is formed in the hub. 3. A catheter tube which is inserted into a body cavity such as a blood vessel and has at least two first and second lumens formed along a longitudinal direction, and a catheter tube having an outer periphery at a distal end of the catheter tube. A second lumen formed in the catheter tube, which is connected to the inside of the catheter tube, and has a balloon portion which can be inflated outward by a fluid sent through the second lumen; An opening communicating with the first lumen is formed on the outer periphery of the catheter tube at a predetermined distance from the portion where the proximal end is joined to the outer periphery of the catheter tube on the proximal end side, and the guide is passed through the opening. A balloon catheter having a distal end portion of a wire inserted into the first lumen, wherein a catheter connector provided at a proximal end portion of the catheter tube is close to the catheter connector; A balloon catheter having a receiving recess in which a proximal end of a guide wire protruding toward a proximal end is detachably mounted.