JP2000084089A - Guide wire introduction aid and catheter equipped with same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a guide wire introduction aid facilitating an introducing operation of a guide wire inserted in a living body and allowing the easy removal of the guide wire from an introduction line after the introduction operation, and a catheter equipped with the aid. SOLUTION: This guide wire introduction aid has lumens 3a, 4a and 5a, and the insertion end 100a of a catheter 100 or the insertion end of a stylet is detachably attached to each one end of the lumens 3a, 4a and 5a. Also, the guide wire 200 is introduced to a catheter lumen 101 or via the lumens 3a, 4a and 5a. The catheter 100 is equipped with a guide wire introduction aid A so formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used when a catheter is inserted into a living body by the Seldinger method or the like.
In particular, the other end of the guide wire, one end of which is inserted into the body, is guided to the end on the side where the catheter is inserted or the end of the stylet, and the guide wire is inserted into the catheter lumen or stylet lumen. The present invention relates to a guidewire introduction aid effective for introduction and a catheter including the same.

[0002]

2. Description of the Related Art Conventionally, when a therapeutic or inspection catheter is introduced to a target site in a human body and placed there using, for example, the Seldinger method or the like, a guide wire used has an outer diameter of 0 mm. It was relatively thick, about 0.028 inch to 0.038 inch. However, in order to use a thick guide wire, a thick puncture needle or the like must be used when inserted into the body, and the invasion to a human (living body) is large.

In order to solve such a problem, a relatively thin guide wire having an outer diameter of about 0.021 inch to 0.018 inch has been developed. At present, such a thin guide wire is widely used. ing. With the use of a thin guide wire, the puncture needle, the catheter, and the like also become thin, thereby minimizing the invasion to humans (living bodies).

[0004]

However, when introducing a catheter into the body, the other end of a thin guide wire having one end inserted into a human body is introduced into the lumen of the thin catheter. Is difficult, has extra time, and does not allow smooth treatment, which may hinder the operator's concentration. In such cases, there was no other choice but to rely on the skills of medical personnel such as doctors.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and makes it easy to introduce a guide wire inserted into a living body into a catheter, and to easily introduce the guide wire from an introduction line after the introduction operation. It is an object of the present invention to provide a guidewire introduction aid that can be removed and a catheter having the guidewire introduction aid.

[0006]

SUMMARY OF THE INVENTION A guidewire introduction aid according to the present invention has a lumen, and a stylet inserted into a catheter insertion end or a catheter lumen at one end of the lumen. Is removably attached to the insertion end, and introduces a guide wire into the catheter lumen or the stylet lumen via the lumen.

[0007] The guidewire introduction aid according to the present invention is a catheter insertion cavity in which a stylet inserted into a catheter insertion end or a stylet inserted in the catheter insertion opening is detachably fitted, or a catheter inner diameter or a catheter insertion opening. It has a lumen consisting of a guidewire insertion cavity into which the introduction end of the guidewire is inserted at a diameter larger than the stylet lumen diameter and a connection cavity communicating with both insertion spaces, and a catheter lumen or A guide wire is introduced into the stylet lumen.

[0008] The guidewire introduction aid according to the present invention is a catheter insertion cavity in which a stylet inserted into a catheter insertion end or a stylet inserted into the catheter insertion opening is removably fitted. It has a lumen consisting of a guidewire insertion cavity into which the introduction end of the guidewire is inserted at a diameter larger than the stylet lumen diameter and a connection cavity communicating with both insertion spaces, and a catheter lumen or A guide wire is introduced into the lumen of the stylet, and is separated from the insertion end of the catheter or the insertion end of the stylet.

[0009] The guidewire introduction aid according to the present invention is a catheter insertion cavity in which the insertion end of a stylet inserted into the insertion end of a catheter or a catheter lumen is removably fitted. It has a lumen consisting of a guidewire insertion cavity into which the introduction end of the guidewire is inserted at a diameter larger than the stylet lumen diameter and a connection cavity communicating with both insertion spaces, and a catheter lumen or A guide wire is introduced into the lumen of the stylet, and the main body is provided with a detaching means for detaching from the insertion end of the catheter or the insertion end of the stylet, and an operating means provided on the main body and operating the detaching means. It was done.

In the guidewire introduction aid according to the present invention, the detaching means is constituted by at least one fragile portion provided along the guidewire insertion direction on the outer peripheral surface of the main body.

The guide wire introduction aid according to the present invention is provided with a slit or a cut portion at one end of the fragile portion and at the start side when the main body portion is divided along the fragile portion. It is.

Further, in the guide wire introduction aid according to the present invention, the operating means is constituted by a pair of handles provided at positions facing the outer peripheral surface of the main body.

In the guide wire introduction aid according to the present invention, a spring member for urging one end side outward is interposed, and the other end projects inwardly and is matched by the urging force of the spring member. Operating portion having a pair of side plates provided with a holding portion, and when the holding portions match, the insertion end of the catheter or the insertion end of the stylet inserted in the catheter lumen is detachably fitted. Forming a lumen comprising a catheter insertion cavity, a guide wire insertion cavity having a diameter larger than the catheter lumen diameter or the stylet lumen diameter, into which the introduction end of the guide wire is inserted, and a connection cavity communicating with both insertion spaces, A guide wire is introduced into the catheter lumen or stylet lumen through this lumen, and when the holding section is opened, the insertion end of the catheter or the stylet is inserted. It is intended to detach from the part.

In the guidewire introduction aid according to the present invention, the connecting cavity is formed such that the cavity diameter is larger than the outer diameter of the guidewire and the length is 5 mm or less, preferably 1 mm to 3 mm. It was done.

Further, in the guide wire introduction aid according to the present invention, the connecting cavity has a cavity diameter of 0.4 mm to 0.9 mm.
It was formed so that it might become the range of.

Further, in the guide wire introduction aid according to the present invention, the guide wire insertion cavity is formed such that the average cavity diameter on the insertion port side is 1.5 to 20 times the cavity diameter of the connection cavity. Things.

[0017] The catheter according to the present invention is characterized in that:
A guide wire introduction aid described in any one of the above (1) to (11).

[0018] The catheter according to the present invention is characterized in that:
The guidewire introduction aid described in any one of Items 1 to 11 is formed integrally with the insertion end via a weak portion.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is an external view, a right side view, and an XX cross-sectional view of a first embodiment of the present invention. In the figure, reference numeral 1 denotes a guide wire introduction aid detachably attached to an end (hereinafter, referred to as an insertion end) 100a of the catheter 100 on the side to be inserted into a living body, and is made of, for example, a synthetic resin material such as polypropylene or polyethylene. , A catheter insertion portion 3, a guide wire insertion portion 4, a connection portion 5 for integrally connecting the two 3 and 4, and a cavity 3 a formed along the insertion direction of the guide wire 200 of each of the portions 3, 4 and 5. It comprises a main body 2 having a lumen composed of 4a and 5a, and a pair of handle portions 7 as operating means provided at opposing positions on the outer peripheral surface of the connecting portion 5 of the main body 2.

The catheter insertion section 3 of the main body 2 is formed in a tapered shape with a diameter substantially equal to or slightly larger than the insertion end 100a of the tapered catheter 100 whose outer diameter is reduced toward the distal end. Catheter insertion cavity 3
a, and the outer peripheral surface is reduced in diameter toward the insertion direction of the catheter 100. Then, the insertion end portion 100a of the catheter 100 is inserted into the catheter insertion cavity 3a.
The catheter 100 is connected by fitting.

The guide wire insertion portion 4 of the main body 2
Is the other end (hereinafter referred to as an introduction end) 200 of the guide wire 200 having one end inserted into the living body.
a is inserted, and the diameter B of the
A guide wire insertion cavity 4a having a diameter larger than the diameter A of the inner lumen 101 and having a tapered shape reduced in diameter in the insertion direction is provided. Therefore, the diameter is reduced.

The connecting portion 5 of the main body 2 is provided with the respective insertion cavities 3 of the catheter insertion portion 3 and the guide wire insertion portion 4.
The outer diameter of the outer peripheral surface is formed smaller than the outer diameters of the outer peripheral surfaces of the catheter insertion section 3 and the guide wire insertion section 4.

The main body 2 has a pair of slits 3b, 5b extending in a direction perpendicular to the handle 7 from the catheter insertion cavity 3a, the connection cavity 5a and the guide wire insertion cavity 4a.
b, 4b are provided, and a fragile portion 6 as a separating means is formed on the outer peripheral surface thereof. At each end of the fragile portion 6 on the side of the catheter insertion portion 3, a substantially V-shaped cut portion 6a is provided so that the main body 2 can be easily divided along the fragile portion 6. Have been.

The pair of handle portions 7 are integrally formed on the outer peripheral surface of the connecting portion 5 of the main body 2 in a substantially L-shape, and have a width of the connecting portion 5.
Is smaller than the width in the direction in which the slit portion 5b is provided,
The thickness of the base portion is the same as the axial length of the connecting portion 5, becomes thinner toward the distal end portion, and becomes substantially parallel to the axial direction of the main body 2 (the direction in which the guide wire 200 is inserted). The same thickness is formed from the part bent toward the insertion part 4 to the tip.

Here, the diameter B of the guide wire insertion portion 4 on the insertion opening side of the guide wire insertion cavity 4a is formed to be 1.5 to 20 times the diameter C of the connection cavity 5a.
This means that it is difficult to insert the thin guide wire 200 into the guide wire insertion portion 4 when the thickness is less than 1.5 times,
If it exceeds 20 times, only the volume of the guide wire introduction aid 1 itself becomes large and the operability is deteriorated.

The connecting portion 5 has a length D of 5 m in the axial direction of the connecting cavity 5a (in the insertion direction of the guide wire 200).
m, preferably in the range of 1 mm to 3 mm. The length D of the connection cavity 5a depends on the size of the gap between the outer periphery of the guide wire 200 inserted into the connection cavity 5a and the wall of the connection cavity 5a. The required length of the length D of the connection cavity 5a also increases as the length of the connection cavity 5a increases. Here, the catheter insertion portion 3
Catheter 100 fitted into the catheter insertion cavity 3a
When the distal end of the insertion end 100 is in contact with the end of the guide wire insertion portion 4 on the catheter insertion portion 3 side of the guide wire insertion portion 4, the length D of the connection cavity 5a of the connection portion 5 is 0 mm, That is, the connecting portion 5 may be omitted, but the catheter 100 is inserted by the introduction end 200a of the guide wire 200 inserted into the guide wire insertion portion 4.
There is a possibility that the tip of the insertion end portion 100a may be damaged, and the resistance at the time of insertion into the living tissue increases.

Therefore, the end of the guide wire insertion cavity 4a on the catheter insertion portion 3 side and the insertion end 100a of the catheter 100 are 0.5 mm to 5 mm, preferably 1 mm.
It is preferable that the guide wire 200 is separated from the guide wire 200 by approximately 5 mm to 3 mm. When the distance exceeds 5 mm, the introduction end 200a of the guide wire 200 inserted into the connection portion 5 is displaced from substantially the center of the connection cavity 5a in the axial direction. This may damage the tip of the insertion end 100a of the catheter 100. Thereby, the length D of the connection cavity 5a of the connection portion 5 is obtained.
Is 5 mm or less, and preferably in the range of 1 mm to 3 mm.

Further, the connecting portion 5 is formed so that the diameter C of the connecting cavity 5a is in the range of 0.4 mm to 0.9 mm.
This is because if the length is less than 0.4 mm, the usable guide wire 200 becomes thinner and bends easily, and the introduction operation to the catheter 100 may not be performed smoothly. The guide wire 200 has the same thickness as the conventional one, and can be directly introduced into the catheter 100.
This is because it is not possible to reduce the invasion of the living body due to the above.

In the first embodiment configured as described above, the guide wire 200 inserted into the living body using the guide wire introduction aid 1 is inserted into the catheter 10.
To introduce the catheter 100 into the catheter insertion tube 100, first, the insertion end portion 100a of the catheter 100 is fitted into the catheter insertion cavity 3a of the catheter insertion portion 3 of the guide wire introduction aid 1, and is firmly connected. Then, the guide wire 200, one end of which is inserted into the living body, is inserted into the guide wire insertion cavity 4a through the insertion opening of the guide wire insertion portion 4, and the guide wire introduction assisting tool 1 is inserted into the living body. To insert it into the connection cavity 5a of the connection part 5. At this time, since the guide wire insertion space 4a of the guide wire insertion portion 4 is formed in a tapered shape whose diameter is reduced toward the connection portion 5, the introduction end 200a of the guide wire 200 is connected to the connection space 5a of the connection portion 5. To be inserted smoothly.

Then, the guide wire introduction aid 1 is further pushed toward the living body, and as shown in FIG. 2, the introduction end 200a of the guide wire 200 inserted through the connection cavity 5a of the connection portion 5 is inserted into the lumen 101 of the catheter 100. And introduce the guide wire 200 to such a length that the guide wire 200 does not come out of the lumen 101 of the catheter 100. At this time, the introduction end 200a of the guide wire 200 passes through substantially the center of the connection cavity 5a in the axial direction, and is guided to the lumen 101 without damaging the insertion end 100a of the catheter 100.

After the introduction, as shown in FIG. 3, two fingers (for example, thumb and forefinger) F1 and F2 of one hand of the medical worker are held so as to sandwich the pair of handle portions 7 in the direction of the solid arrow m. The main body 2 is divided into two along a pair of fragile portions 6. At this time, the fragile portion 6 is gradually broken in the direction of the dashed arrow n triggered by the cut portion 6a provided at the end on the catheter insertion portion 3 side, and the main body 2 is divided. Then, the guidewire introduction aid 1 is detached from the insertion end 100a of the catheter 100, and is removed from the introduction line including the catheter 100 and the guidewire 200.

As described above, the thin guide wire 200 is introduced into the catheter 100 by using the guide wire introduction aid 1 connected to the insertion end 100a of the catheter 100.
The guide end 200a of the guide wire 200 is connected to the lumen of the main body 2 of the guide wire introduction assisting tool 1, that is, the guide wire insertion cavity 4a of the guide wire insertion unit 4 and the connecting portion 5 of the guide wire 200. The connection cavity 5a can guide the catheter 100 connected to the catheter insertion cavity 3a of the catheter insertion portion 3 to the catheter 100 without substantially deviating from the center of the lumen 101 in the insertion direction. Can be easily and reliably performed. Further, since the main body 2 is provided with the catheter insertion cavity 3a of the catheter insertion portion into which the insertion end 100a of the catheter 100 is fitted, the relative position between the catheter 100 and the guidewire introduction aid 1 is easily fixed, The guide wire 200 can be stably introduced. Thereby, even in an emergency, a treatment can be performed promptly without giving a large invasion to the living body, and the guidewire introduction aid 1 with high operability can be obtained.

The guide wire insertion space 4a of the guide wire insertion portion 4 in the main body 2 of the guide wire introduction aid 1 is formed in a tapered shape.
Since the length D is 5 mm or less, and preferably in the range of 1 mm to 3 mm, the introduction end 200a of the thin guide wire 200 can be easily inserted into the connection cavity 5a of the connection portion 5, and the catheter can be inserted by the introduction end 200a. Guide wire 20 without damaging the insertion end 100a of the guide wire 20.
0 can be introduced into the lumen 101 of the catheter 100, and the operability of the introduction operation can be improved.

Further, a pair of handle portions 7 are provided on the outer peripheral surface of the main body 2 of the guide wire introduction aid 1, and a pair of fragile portions 6 and notches 6a are provided in a direction orthogonal to the handle portion 7. One medical worker can easily divide the main body 2 with one hand and remove the unnecessary guidewire introduction aid 1 from the insertion end 100a of the catheter 100 after introducing the guidewire 200 into the catheter 100. , Catheter 100 and guide wire 2
00 can easily be removed from the introduction line. Accordingly, there is no inconvenience that the guidewire introduction auxiliary tool 1 cannot be removed when both hands are closed at the time of withdrawal, and it is possible to prevent the infection of living organisms by a plurality of medical workers in a living body in a procedure whose basic operation is aseptic operation. Thus, the guide wire introduction aid 1 that is easy to use can be obtained.

Embodiment 2 FIG. 4 is an external view, a right side view, and a YY sectional view of a second embodiment of the present invention.
In the figure, reference numeral 11 denotes a guide wire introduction assisting device substantially similar to the guide wire introduction assisting device 1 according to the first embodiment. A pair of handle portions 17 provided at positions
And is constituted by.

The main body portion 12 is connected to the insertion end portion 100a of the catheter 100 by being fitted thereinto, and has a taper-shaped catheter insertion cavity having a diameter substantially equal to or slightly larger than the outer diameter of the insertion end portion 100a of the catheter 100. 13 and the introduction end 200a of the guide wire 200 are inserted, and the diameter B1 of the insertion port side is larger than the diameter A of the lumen 101 of the catheter 100, and is reduced in diameter in the insertion direction to be tapered. Guide wire insertion cavity 14 formed
And a connection cavity 15 communicating with the catheter insertion space 13 and the guide wire insertion space 14. The main body 12 is provided with a pair of slits 13 a, 15 a, 14 a in a direction perpendicular to the handle 7 from the catheter insertion cavity 13, the connection cavity 15, and the guide wire insertion cavity 14. Each has a fragile portion 16 as a detaching means. At each end of the fragile portion 16 on the side of the catheter insertion cavity 13, a substantially V-shaped cut portion 16 a is provided so that the main body 12 can be easily divided along the fragile portion 16. Have been.

The pair of handle portions 17 are integrally formed substantially in an L-shape on the outer peripheral surface of the end portion of the main body portion 12 on the side of the catheter insertion cavity 13, have a width smaller than the width of the main body portion 12, and have a thickness at the tip. It becomes thinner toward the part, and is formed to have the same thickness from the part bent toward the catheter insertion cavity 13 on the way to the tip so as to be substantially parallel to the axial direction of the main body part 2 (the insertion direction of the guide wire 200). ing.

Here, the diameter B1 on the insertion port side of the guide wire insertion cavity 14 is 1.5 to 20 times the diameter C1 of the connection cavity 15.
It is formed so as to be doubled.
As in the case of (1), it is difficult to insert the thin guidewire 200 into the guidewire insertion cavity 14 if the magnification is less than 1.5 times, and if the magnification exceeds 20 times, only the volume of the guidewire introduction aid 11 itself becomes large. This is inferior in operability.

The length D1 of the connecting cavity 15 in the axial direction (the direction in which the guide wire 200 is inserted) is 5 mm or less, and preferably 1 mm to 3 mm. This is also less than 1 mm and 5 mm as in the first embodiment.
When the length exceeds mm, the introduction end portion 200a of the guide wire 200 cannot pass through substantially the center in the axial direction of the connection cavity 15, and the introduction end portion 200a damages the distal end of the insertion end portion 100a of the catheter 100. This is because there is a fear.

Further, the diameter C1 of the connection cavity 15 is 0.4 mm.
It is formed in a range of 0.9 mm. Also in this case, similarly to the case of Embodiment 1, if it is less than 0.4 mm, the usable guide wire 200 becomes thinner and easily bends, and there is a possibility that the introduction operation to the catheter 100 may not be performed smoothly, If it exceeds 0.9 mm, the guide wire 200 to be used has the same thickness as the conventional one, and it can be directly introduced into the catheter 100, and the invasion of the living body by the thick guide wire 200 cannot be reduced. is there.

With such a configuration, substantially the same operation and effect as those of the first embodiment can be obtained, and the inner cavity of the main body 12 of the guidewire introduction aid 1, that is, the guidewire insertion cavity 14 and the connection cavity 15 are formed. Through this, the introduction end 200a of the thin guide wire 200 can be easily and reliably guided to the lumen 101 of the catheter 100 connected to the catheter insertion cavity 13, and operability can be improved. In addition, the guide wire introduction aid 11 that is no longer needed can be easily removed from the introduction line by dividing the main body portion 12, and the user-friendly guide wire introduction aid 11 can be obtained.

Embodiment 3 FIG. 5 is an external view, a right side view, and a ZZ sectional view of a third embodiment of the present invention.
In the figure, 21 is the insertion end 100 of the catheter 100
A guide wire introduction aid in the form of clothespins which is detachably attached to the housing, and is made of, for example, a synthetic resin material such as polypropylene or polyethylene.

The guide wire introduction assisting tool 21 includes a pair of side plates 22a, 22a and a pair of side plates 22a, 22a via a shaft 25.
An operation unit 22 formed in a substantially H-shape plane by connecting plates 22b, 22b connecting the first and second side plates 22a, and having recesses 22c, 22c on outer surfaces near one ends of both side plates 22a, 22a.
Holding portions 23, 23 which are provided at the other ends of both side plates 22a, 22a so as to protrude inward from each other, and have a substantially semicircular planar shape.
, And are interposed between the side plates 22a, 22a and the shaft 25,
It is constituted by a spring member 24 which urges one end side of both side plates 22a, 22a outward.

The holding portions 23 provided at the other ends of the both side plates 22a, 22a are aligned with each other so that the insertion ends 10 of the catheter 100 are aligned.
0a is substantially equal to or slightly larger than the outer diameter and is tapered, and the diameter of the insertion port is increased toward the insertion port so that the insertion end 100a of the catheter 100 is fitted and connected thereto. The guide end 200a of the guide wire 200 is inserted, and the diameter B2 on the insertion port side is larger than the diameter A of the lumen 101 of the catheter 100, and is reduced in diameter in the insertion direction to form a taper. The formed guide wire insertion cavity 23b and the connection cavity 23c communicating with both the cavities 23a and 23b are formed.
Further, the holding portions 23, 23 are always matched by the urging force of the spring member 24, and are opened by pressing one ends of both side plates 22a, 22a inward each other.

Here, the diameter B2 of the insertion hole side of the guide wire insertion cavity 23b is 1.5 times or more the diameter C2 of the connection cavity 23c.
If it is less than 1.5 times, it is difficult to insert the thin guide wire 200 into the guide wire insertion cavity 23b, as in the case of the first embodiment. This is because, when it exceeds, the operability is inferior because only the volume of the guide wire introduction aid 21 itself becomes large.

The length D2 of the connecting cavity 23c in the axial direction (the direction in which the guide wire is inserted) is 5 mm or less, and preferably in the range of 1 mm to 3 mm. Also, as in the case of Embodiment 1, when the length is less than 1 mm and exceeds 5 mm, the introduction end 200 of the guide wire 200 is
a cannot pass through substantially the center of the connection cavity 23c in the axial direction, and the leading end 200a may damage the distal end of the insertion end 100a of the catheter 100.

Further, the diameter C2 of the connection cavity 23c is 0.4 m.
It is formed in a range of m to 0.9 mm. Also in this case, similarly to the case of Embodiment 1, if it is less than 0.4 mm, the usable guide wire 200 becomes thinner and easily bends, and there is a possibility that the introduction operation to the catheter 100 may not be performed smoothly, If it exceeds 0.9 mm, the guide wire 200 to be used has the same thickness as the conventional one, and it can be directly introduced into the catheter 100, and the invasion of the living body by the thick guide wire 200 cannot be reduced. is there.

In the third embodiment configured as described above, similarly to the case described in the first embodiment, the guide wire 200 inserted into the living body using the guide wire introduction aid 21 is catheterized. 100, first, the recesses 22 provided on both side plates 22a, 22a of the operation unit 22 of the guide wire introduction aid 21 are provided.
One of the hands of the medical worker is sandwiched between the c and 22c, for example, with two fingers, and one end of each of the side plates 22a, 22a is pressed inward to open the holding portions 23, 23. Then, the insertion end portion 100a of the catheter 100 is inserted into one of the opened catheter insertion cavities 23a of the holding portions 23, 23, the pressing of the side plates 22a, 22a is relaxed, and the catheter 100 is inserted into another catheter insertion cavity 23a. Insertion end 100a
The holding portions 23, 23 are closed and fitted to each other, and the insertion end 100a of the catheter 100 is firmly connected to the guide wire introduction aid 21.

Next, the guide wire 200, one end of which is inserted into the living body, is inserted through the insertion opening of the guide wire insertion cavity 23b of the matching holders 23, 23 so that the guide wire is introduced. The assisting tool 21 is pushed toward the living body and inserted into the connection cavity 23c. At this time, since the guide wire insertion cavity 23b is formed in a tapered shape whose diameter is reduced toward the connection cavity 23c, the introduction end 200a of the guide wire 200 is smoothly inserted into the connection cavity 23c.

Then, the guide wire introduction aid 21 is further pushed toward the living body, and as shown in FIG. 5C, the introduction end 200a of the guide wire 200 inserted through the connection cavity 23c is inserted into the lumen 101 of the catheter 100. The guide wire 200 is inserted and introduced to such a length that the guide wire 200 does not come out of the lumen 101 of the catheter 100. At this time, the introduction end 200a of the guide wire 200 passes through substantially the center in the axial direction of the connection cavity 23c, and the insertion end 100a of the catheter 100
Is guided to the lumen 101 without damaging the body.

After the introduction, the two side plates 22 of the operation unit 22 of the guide wire introduction aid 21 are inserted with two fingers of one hand of a medical worker.
a, 22a, and is pressed inward to open the holding portions 23, 23. Then, the insertion end 100 of the catheter 100
is removed from the catheter insertion cavity 23a, and the guide wire introduction aid 21 is removed from the introduction line including the catheter 100 and the guide wire 200.

As described above, the thin guide wire 200 is introduced into the catheter 100 by using the guide wire introduction aid 2 connected to the insertion end 100a of the catheter 100.
1 so that the guide wire 200
Can be reliably guided into the lumen 101 of the catheter 100, and the operation of introducing the guide wire 200 into the catheter 100 can be performed easily and reliably. The insertion end 100a of the catheter 100 is formed by aligning the holding portions 23, 23.
Is provided, the catheter 100 and the guide wire introduction assisting tool 21 are provided.
Relative position can be easily fixed, and a stable operation of introducing the guide wire 200 can be performed.

Also, both side plates 22a, 22a of the operation unit 22
Due to the urging force of the spring member 24 interposed between the shaft 22 and the shaft 25, the holding portions 23, 23 provided at the ends of the both side plates 22a, 22a are always matched, and the both side plates 22a, 22a are pressed inward. As a result, the holding portions 23 are opened so that the guide wire introduction aid 21 is
Can be easily attached to and detached from the catheter 100. In addition, since the attachment and detachment operation can be performed by a single medical attendant, the chance of bacterial infection of the living body can be significantly reduced, and the user-friendly guide wire introduction aid 21 can be obtained.

Embodiment 4 FIG. 6 is a side view of the fourth embodiment of the present invention as viewed from the base side. In the fourth embodiment, the guide wire introduction aid 1 according to the first embodiment includes the insertion end portion 100 a via the weak portion 31. This is a catheter 100A formed integrally with the catheter 100A. The catheter insertion portion 3 of the main body 2 of the guidewire introduction aid 1 has a taper-shaped catheter insertion cavity 32 having a diameter larger than the outer diameter of the insertion end 100a of the catheter 100A, and a catheter insertion portion 3. And a plurality of rib-shaped fragile portions 31 formed between the inner surface and the insertion end 100a. Further, the catheter 100A is divided by the weak portion 6 provided on the main body 2 by pressing the pair of handles 7 of the guide wire introduction aid 1 toward each other, whereby the main body 2 is divided. At the same time, the catheter insertion portion 3 and the insertion end portion 100a at the weakened portion 31 of the catheter insertion portion 3
Is divided so that the guide wire introduction assisting tool 1 is detached from the insertion end portion 100a.

With such a configuration, substantially the same operation and effect as those of the first embodiment can be obtained, and the thin guide wire 200 can be easily and reliably introduced into the lumen 101 of the catheter 100A. Withdrawal of the introduction assisting tool 1 from the catheter 100A,
This can be easily performed by dividing the catheter insertion portion 3 and the insertion end portion 100a at the same time as the division of the main body portion 2, and the catheter 100A provided with the guide wire introduction aid 1 having good operability can be obtained. The catheter 100A is provided with the guidewire introduction aid 1 and the catheter 10 at the beginning of the guidewire 200 introduction operation.
Since the operation of connecting 0A can be omitted, the chance of bacterial infection of the living body can be greatly reduced,
Catheter 1 with guide wire introduction aid 1 that can reduce invasion to the living body and is easy to use
00A can be obtained.

As described above, the embodiments of the present invention have been described. However, the present invention is not limited to the embodiments, and can be appropriately modified as follows, for example. (1) In the above-described first to fourth embodiments, the catheter insertion cavities 3a, 13, 23a, 32, and the guide wire insertion cavities 4
Although the case where the a, 14, 23b and the connection cavities 5a, 15, 23c are formed in a substantially circular shape in a plane is shown, the guide wire 200 is not limited to the single lumen catheter 100 but to the double lumen or triple lumen catheter.
May be introduced, and may be formed into, for example, a substantially elliptical planar shape, and the shape can be appropriately changed.

(2) The lumen 10 of the catheter 100
Although the case where the guidewire 200 is introduced is described as an example in FIG. 1, the case where the guidewire 200 is introduced into the lumen of the stylet inserted into the lumen 101 of the catheter 100 may be used. To play.

(3) In the first and second embodiments, the main body 2,
12 shows a case where two weak portions 6 and 16 are provided, and V-shaped cut portions 6a and 16a are provided at one end thereof, for example, one weak portion may be provided.
A slit or the like may be provided instead of a and 16a.

(4) In the fourth embodiment, the catheter 100A in which the guide wire introduction aid 1 according to the first embodiment is formed substantially integrally with the insertion end 100a has been described. The wire introduction assisting tool 11 may be formed substantially integrally, or without being formed almost integrally, the catheter 100 may be provided with the guide wire introducing aids 1, 11, 21 according to the first to third embodiments. .

[0060]

As described above, the guidewire introduction aid according to the present invention has a lumen, and a stylet inserted into the catheter insertion end or the catheter lumen at one end of the lumen. The insertion end is detachably attached, and the guide wire is introduced into the catheter lumen or the stylet lumen via the lumen, so that the operation of introducing a thin guide wire can be performed easily and reliably. This makes it possible to obtain an easy-to-operate guidewire introduction aid that can be promptly treated without causing a major invasion of the living body even in an emergency.

The guidewire introduction aid according to the present invention provides a catheter insertion cavity into which the insertion end of a catheter or a stylet inserted into the lumen of the catheter is removably fitted, the diameter of the catheter lumen or the diameter of the catheter lumen. It has a lumen consisting of a guidewire insertion cavity into which the introduction end of the guidewire is inserted at a diameter larger than the stylet lumen diameter and a connection cavity communicating with both insertion spaces, and a catheter lumen or Since the guidewire is introduced into the stylet lumen, the introduction end of the catheter can be reliably held by the catheter insertion cavity, and a stable guidewire introduction operation can be performed.

The guidewire introduction aid according to the present invention provides a catheter insertion cavity into which the insertion end of a catheter or a stylet inserted into the catheter lumen is removably fitted, or a catheter lumen or a catheter lumen. It has a lumen consisting of a guidewire insertion cavity into which the introduction end of the guidewire is inserted at a diameter larger than the stylet lumen diameter and a connection cavity communicating with both insertion spaces, and a catheter lumen or Since the guide wire is introduced into the stylet lumen and detached from the insertion end of the catheter or the insertion end of the stylet, the operation of introducing a thin guide wire can be performed easily and reliably, and the guide wire can be inserted into the catheter. The guide wire introduction aid that is no longer needed can be easily removed from the introduction line while it is in the introduced state, There can be obtained freely good guide wire introduction aid.

The guide wire introduction assisting device according to the present invention is a catheter insertion cavity in which the insertion end of a stylet inserted into the insertion end of a catheter or a catheter lumen is detachably fitted. It has a lumen consisting of a guidewire insertion cavity into which the introduction end of the guidewire is inserted at a diameter larger than the stylet lumen diameter and a connection cavity communicating with both insertion spaces, and a catheter lumen or A guide wire is introduced into the lumen of the stylet, and the main body is provided with a detaching means for detaching from the insertion end of the catheter or the insertion end of the stylet, and an operating means provided on the main body and operating the detaching means. And
The detaching means is constituted by at least one fragile portion provided along the guide wire insertion direction on the outer peripheral surface of the main body, and the main body is divided along the fragile portion at one end of the fragile portion. A slit or a notch is provided on the starting side when the operation is performed, and the operating means is constituted by a pair of handles provided at opposing positions on the outer peripheral surface of the main body. Thus, the guide wire can be easily detached from the insertion end of the catheter or the insertion end of the stylet, and a guide wire introduction aid with good operability can be obtained.

In the guide wire introduction aid according to the present invention, a spring member for urging one end side outward is interposed, and the other end projects inwardly and is matched by the urging force of the spring member. Operating portion having a pair of side plates provided with a holding portion, and when the holding portions match, the insertion end of the catheter or the insertion end of the stylet inserted in the catheter lumen is detachably fitted. Forming a lumen comprising a catheter insertion cavity, a guide wire insertion cavity having a diameter larger than the catheter lumen diameter or the stylet lumen diameter, into which the introduction end of the guide wire is inserted, and a connection cavity communicating with both insertion spaces, A guide wire is introduced into the catheter lumen or stylet lumen through this lumen, and when the holding section is opened, the insertion end of the catheter or the stylet is inserted. Since disengaging from parts, it is possible to easily perform attachment and detachment of the catheter or stylet, can significantly reduce the chance of infection in vivo, it is possible to obtain a user-friendly guide wire introduction aid.

In the guidewire introduction aid according to the present invention, the connecting cavity is formed so that the cavity diameter is larger than the outer diameter of the guidewire and the length is 5 mm or less, preferably 1 mm to 3 mm. Therefore, the thin guide wire can be introduced into the lumen of the catheter without damaging the insertion end of the catheter by the introduction end thereof, and the operability of the introduction operation can be improved.

In the guidewire introduction aid according to the present invention, the connecting cavity has a cavity diameter of 0.4 mm to 0.9 mm.
, The thin guide wire can be smoothly introduced into the lumen of the catheter without bending.

Further, in the guidewire introduction aid according to the present invention, the guidewire insertion cavity is formed such that the average cavity diameter on the insertion port side is 1.5 to 20 times the cavity diameter of the connection cavity. Therefore, the operation of introducing a thin guide wire that is frequently used can be performed easily and reliably.

The catheter according to the present invention is characterized in that:
Since the guide wire introduction assisting device described in any one of the above items 1 to 11 is provided, it is possible to obtain a catheter that can easily and reliably perform a thin guide wire introduction operation.

The catheter according to the present invention is characterized in that:
Since the guide wire introduction aid described in any one of Items 1 to 11 is formed integrally with the insertion end portion via the fragile portion, the guide wire can be easily and reliably introduced, and the guide wire introduction of the catheter can be performed. Since the operation of fitting into the assisting tool can be omitted, an easy-to-use catheter that can greatly reduce the chance of bacterial infection of the living body and reduce invasion to the living body can be obtained.

[Brief description of the drawings]

FIG. 1 is an external view, a right side view, and an XX cross-sectional view of a first embodiment of the present invention.

FIG. 2 is an operation explanatory diagram of the first embodiment of the present invention.

FIG. 3 is an operation explanatory view of the first embodiment of the present invention.

FIG. 4 is an external view, a right side view, and a YY sectional view of a second embodiment of the present invention.

FIG. 5 is an external view, a right side view, and a ZZ cross-sectional view of a third embodiment of the present invention.

FIG. 6 is a side view of a fourth embodiment of the present invention as viewed from a base side.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1, 11, 21 Guide wire introduction assistance tool 2, 12 Main body part 3 Catheter insertion part 4 Guide wire insertion part 5 Connecting part 3a, 13, 23a, 32 Catheter insertion space 4a, 14, 23b Guide wire insertion space 5a, 15, 23c Connection cavity 6,16,31 Fragile part 6a, 16a Cut part 7,17 Handle part 22 Operation part 22a Side plate 23 Holding part 24 Spring member 100,100A Catheter 100a Insertion end 101 Lumen 200 Guide wire 200a Introduction end A Catheter lumen diameter B, B1, B2 Lumen diameter of insertion port of guide wire insertion part C, C1, C2 Lumen diameter of coupling part D, D1, D2 Length of lumen of coupling part

Claims (13)

[Claims] 1. A catheter having an inner cavity, and an insertion end of a catheter or an insertion end of a stylet inserted into the inner cavity of the catheter is detachably attached to one end of the inner cavity. A guidewire introduction aid, wherein a guidewire is introduced into a catheter lumen or a stylet lumen via a guidewire. 2. A catheter insertion cavity into which an insertion end of a catheter or a stylet inserted into a lumen of the catheter is removably fitted, and has a diameter larger than the diameter of the catheter cavity or the diameter of the stylet. It has a guide wire insertion cavity into which the introduction end of the guide wire is inserted, and a lumen consisting of a connection cavity communicating with both insertion spaces, and introduces the guide wire into the catheter lumen or stylet lumen through the lumen. A guide wire introduction aid characterized by being made to be. 3. The catheter insertion cavity into which the insertion end of the catheter or the stylet inserted into the lumen of the catheter is removably fitted, the diameter of which is larger than the diameter of the catheter cavity or the diameter of the stylet lumen. It has a guide wire insertion cavity into which the introduction end of the guide wire is inserted, and a lumen consisting of a connection cavity communicating with both insertion spaces, and introduces the guide wire into the catheter lumen or stylet lumen through the lumen. A guidewire introduction aid, wherein the guidewire introduction aid is detached from the insertion end of the catheter or the insertion end of the stylet. 4. A catheter insertion cavity into which an insertion end of a catheter or a stylet inserted into a lumen of the catheter is removably fitted, the diameter of which is larger than the diameter of the catheter cavity or the diameter of the stylet lumen. It has a guide wire insertion cavity into which the introduction end of the guide wire is inserted, and a lumen consisting of a connection cavity communicating with both insertion spaces, and introduces the guide wire into the catheter lumen or stylet lumen through the lumen. And a main body having a detaching means for detaching from the insertion end of the catheter or the insertion end of the stylet, and operating means provided on the main body and operating the detaching means. Guide wire introduction aid. 5. The guidewire introduction aid according to claim 4, wherein the detaching means is constituted by at least one fragile portion provided along the guidewire insertion direction on the outer peripheral surface of the main body. . 6. The guide according to claim 5, wherein a slit or a notch is provided at one end of the fragile portion and at a start side when the main body is divided along the fragile portion. Wire introduction aid. 7. The guide wire introduction aid according to claim 4, wherein the operating means is constituted by a pair of handles provided at positions facing the outer peripheral surface of the main body. . 8. A pair of spring members each of which is provided with a spring member for urging one end side outward and a holding portion projecting inward from the other end and adapted to be matched by the urging force of the spring member. An operation portion having a side plate of a catheter insertion cavity into which the insertion end of the catheter or the insertion end of the stylet inserted into the catheter lumen is detachably fitted when the holding portion is aligned. Forming a lumen consisting of a guide wire insertion cavity into which the introduction end of the guide wire is inserted with a diameter larger than the cavity diameter or the stylet lumen diameter and a connection cavity communicating with both the insertion spaces, and a catheter through the lumen; The guide wire is introduced into the lumen or the stylet lumen, and is detached from the insertion end of the catheter or the insertion end of the stylet when the holding section is opened. Guide wire introduction aids. 9. The connecting cavity has a cavity diameter larger than the outer diameter of the guide wire and a length of 5 mm or less, preferably 1 mm.
The guidewire introduction aid according to any one of claims 2 to 8, wherein the guidewire introduction aid is formed so as to have a range of about 3 mm. 10. The connecting cavity having a cavity diameter of 0.4 mm or more.
The guidewire introduction aid according to any one of claims 2 to 9, wherein the guidewire introduction aid is formed to be in a range of 0.9 mm. 11. The guide wire insertion cavity is formed such that the average cavity diameter on the insertion port side is 1.5 to 20 times the cavity diameter of the connection cavity.
The guidewire introduction aid according to any one of the above. 12. A catheter comprising the guidewire introduction aid according to any one of claims 1 to 11. 13. A catheter, wherein the guidewire introduction aid according to any one of claims 1 to 11 is formed integrally with an insertion end via a weak portion.