JP2002143317A - Insertion tube and catheter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insertion tube capable of easily inserting a guide wire into a shaft without collapsing a tip of the shaft by a tip of the guide wire when the guide wire is inserted into the tip of the shaft of a catheter. SOLUTION: This cylindrical insertion tube 1, 11, 21 capable of being mounted on the tip of the shaft 33 of the catheter 30, has a guide wire insertion port 3 at its front part and a catheter mounting port on its rear part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insertion tube used for inserting a guide wire (hereinafter abbreviated as "GW") from a tip of a shaft such as a catheter, and a catheter equipped with the insertion tube.

[0002]

2. Description of the Related Art The present invention relates to a catheter used in, for example, percutaneous angioplasty (hereinafter abbreviated as "PTCA"), for example, a GW from a distal end of a shaft such as a monorail balloon catheter. When the shaft is inserted, the diameter of the tip of the shaft is 1 mm or less, and it is difficult to insert the GW, and the tip of the shaft may be crushed by the tip of the GW. The inventor of the present invention has made intensive studies in order to solve the above problems, and as a result, has arrived at the next invention.

[0003]

Means for Solving the Problems [1] The present invention relates to a tubular insertion tube which can be attached to the tip of a shaft 33 of a catheter 30. Provided insertion tubes 1, 11, 21 provided. [2] The present invention provides the insertion tubes 1, 11 according to the above [1], wherein the grooves 5 are formed in the length direction of the cylindrical body 2. [3] The present invention provides the insertion tube 11 according to the above [1] or [2], wherein the insertion tube 11 is provided with the wings 6 on the outer periphery opposite to the groove 5. [4] The present invention provides the insertion tube 21 according to [1], wherein cut grooves 7 are formed on upper and lower sides of the cylindrical body 2 and wings 6a are provided on left and right sides of the cylindrical body 2. [5] The present invention relates to a method of
The insertion tubes 1, 11, 21 according to the above [1] to [4], provided with the mark 8 indicating the direction of the insertion tube. [6] The present invention provides a catheter 30 having the insertion tubes 1, 11, 21 described in the above [1] to [5] at the tip of a shaft 33.

[0004]

FIG. 1 is a schematic view of a catheter 30 when an insertion tube 1 is attached to the tip of a shaft 33. FIG.
FIG. 3 is an enlarged view of the insertion tube 1 when the groove 5 faces the front. The insertion tube 1 is composed of a cylindrical body 2, an insertion port 3 for inserting a GW 31 is formed in front of the cylindrical body 2, and a mounting port 4 for mounting on a shaft 33 such as a catheter (balloon catheter) is formed on the rear side. ing. The inner circumference of the insertion slot 3 is G
A taper T is formed to facilitate insertion of the tip of W31. The mounting opening 4 is formed in accordance with a shape in which the tip of the shaft 33 can be easily mounted. A groove 5 for removing the insertion tube 1 from the GW 31 in the longitudinal direction of the cylinder 2
Is formed, and the width of the groove 5 is formed to a width at which the GW 31 deviates. Also, when removing the insertion tube from the GW 31, the groove 5 is so secured that the GW 31 is not caught in the groove 5.
Are formed at the corners at both ends of the.

[0005] A method of using the insertion tube 1 of the present invention will be described. The mounting port 4 of the insertion tube 1 is pressed into the distal end of the shaft 33 of the catheter 30. In order to easily remove the GW 31 from the groove 5, it is preferable that the groove 3 be seen by an operator (the groove 5 is directed to the front as shown in FIGS. 1 and 2). The tip of the GW 31 is inserted from the insertion port 3. After the completion of the insertion of the GW 31, the insertion tube 1 is connected to the shaft 33.
From the end of the GW31 to the middle of the GW31. The GW 31 is applied to the groove 5 of the insertion tube 1 and the insertion tube 1 is pulled off.

FIG. 3 is a perspective view of an insertion tube 11 showing another embodiment of the insertion tube 1. Two blades 6 are provided in parallel on the outer periphery on the opposite side of the groove 5. In the usage method of the paragraph number [0005], when there are two wings 6, the wings 6 are picked up from both sides with fingers, and the grooves 5 are opened by sandwiching the wings 6 from the outside to the inside. The GW 31 can be easily removed. Further, one wing 6 may be provided on the opposite side of the groove 5 by 180 degrees. In this case, the wing 6 can be pinched and pulled to the opposite side of the groove 5 to be detached from the GW 31. Insertion tube 1
The other shapes (inner shape and the like) of 1 are substantially the same as those of the insertion tube 1, and thus detailed description is omitted.

FIG. 4 is a perspective view of an insertion tube 21 showing another embodiment of the insertion tubes 1 and 11. As shown in FIG. The insertion tube 21 is
Are formed above and below, and two wings 6a are provided horizontally on the left and right sides of the cylindrical body 2. The wing 6a is provided to cut the cylindrical body 2 from the upper and lower cut grooves 7 to the left and right. The “cut groove 7” is a form in which the tubular body 2 can be cut right and left. For example, all forms such as "perforated" and "thin groove" are included. The wing 6a may be provided either in front of or behind the tubular body 2 as long as it can cut the tubular body 2 right and left. Other shapes (the inner shape and the like) of the insertion tube 21 are substantially the same as those of the insertion tube 1, and thus detailed description is omitted.

In order to distinguish the insertion port 3 and the mounting port 4 of the insertion tubes 1, 11, 21 from each other, a projection serving as a mark 8 can be formed on the outer periphery of the insertion port 3, for example. The “mark” can distinguish between the insertion port 3 and the mounting port 4. For example, the shape of the protrusion 8 and the coloration thereof, and the form and the position of the cylindrical body 2 include all forms that can distinguish the insertion port 3 from the mounting port 4. The insertion tubes 1, 11, 21 are preferably formed of a flexible material such as polyvinyl chloride or polyethylene.

As described above, the insertion tubes 1, 11, and 21 are provided as GWs on the distal end of the shaft 33 as separate components of the catheter.
31 can be used when inserting. Further, the insertion tubes 1, 11, and 21 can be attached to the distal end of the shaft 33 at the time of assembling the catheter in advance. As described above, the insertion tubes 1, 11, and 21 can be assembled as components of the catheter, and can be made detachable at the tip of the shaft as a separate component.

[0010]

The insertion tubes 1, 11, and 21 of the present invention are:
When inserting the GW 31 into the distal end of the shaft 33 of the catheter 30, the GW 31 can be easily inserted into the shaft 33 without crushing the distal end of the shaft 33 with the distal end of the GW 31. The insertion tube 11 picks the wing 6 from both sides with fingers,
The groove 5 is opened by being sandwiched from the outside to the inside, and the GW is opened.
31 can be easily removed from the opened groove 5, and even when there is only one wing 6, the wing 6 can be pinched and pulled to the opposite side of the groove 5 to remove it from the GW 31. Insertion tube 21
Then, by pulling the two wings 6a left and right, the cylindrical body 2 is cut off from the cut groove 7 at the same time, and the insertion tube 21 can be easily removed from the GW 31. Insertion tube 1, 1
By forming the mark 8 on the outer periphery of the insertion ports 3 of the first and the second 21, it is possible to distinguish the direction of the insertion port 3 of the GW 31 and the direction of the mounting port 4 of the catheter.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a catheter 30 when an insertion tube 1 is attached to a tip of a shaft 33.

FIG. 2 is an enlarged view of the insertion tube 1 of the present invention.

FIG. 3 is a perspective view of an insertion tube 11 showing another embodiment of the insertion tube 1.

FIG. 4 is a perspective view of an insertion tube 21 showing another embodiment of the insertion tube 1.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 11, 21 Insertion pipe 2 Cylindrical body 3 (Guide wire) insertion port 4 (Shaft tip) mounting port 5 Groove 6, 6a Wing 7 Cut groove 8 Mark (projection) 30 Catheter 31 Guide wire (GW) 32 Balloon 33 Shaft T Taper R Roundness

Claims (6)

[Claims] 1. A tubular insertion tube that can be attached to the distal end of a shaft 33 of a catheter 30. The insertion tube 1 has a guide wire insertion port 3 at the front and a catheter attachment port 4 at the rear. 11, 21. 2. The insertion tubes 1, 11 according to claim 1, wherein grooves 5 are formed in the length direction of the cylindrical body 2. 3. The insertion tube 11 according to claim 1, wherein a wing 6 is provided on the outer periphery opposite to the groove 5. 4. The insertion tube 21 according to claim 1, wherein cut grooves 7 are formed on upper and lower sides of the cylindrical body 2, and wings 6a are provided on left and right sides of the cylindrical body 2. 5. The apparatus according to claim 1, further comprising a mark on the outer periphery of the insertion opening of the cylindrical body for indicating a direction of the cylindrical body.
Insertion tubes 1, 11, 21 according to any one of Items 1 to 4, 6. A catheter 30 comprising the insertion tube 1, 11, 21 according to claim 1 provided at the tip of a shaft 33.