JP2000237319A - Production of endoscope treatment implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mount radiation impermeable markers to a tube without damaging the tube and without making a projecting part. SOLUTION: Two or more pieces of the radiation impermeable markers 2 are mounted to the outer periphery of the tube 1 having a lumen. This process has a stage for using the tubular radiation impermeable markers 2 slightly larger than the outside diameter of the tube 1, disposing >=2 pieces of the radiation impermeable markers 2 on the outer side of the tube 1 and temporally fixing the radiation impermeable markers 2 to the outer periphery of the tube 1 and a stage for embedding and fixing the radiation impermeable markers 2 into the outer periphery of the tube 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing an endoscope treatment instrument by fixing two or more radiopaque markers on the outer periphery of a tube having a lumen.

[0002]

2. Description of the Related Art A tube to which a radiopaque marker is fixed is used as an endoscopic treatment tool, and its use will be described. In FIG. 9, two or more radiopaque markers 102 made of a metal ring or the like are attached to the outer periphery of a tube 101 having a lumen 110. The pitch distance of the radiopaque markers 102 is set to a fixed value. Therefore, by providing two or more radiopaque markers 102, the markers can be used as a scale.

[0003] The tube 101 is inserted into the body through an endoscope. For insertion into the bile duct, etc., the tube 1
A tube guide wire is inserted into the bile duct or the like from the inside of 01, and then the tube 101 is inserted into the bile duct or the like. Then, in a state of being inserted into a bile duct or the like, X-rays are emitted from outside the body.
At this time, since the radiopaque marker 102 does not transmit X-rays, the length of the bile duct and the like can be accurately measured even from outside the body.

FIG. 10 shows a method disclosed in Japanese Patent Application Laid-Open No. Hei 6-197974 for manufacturing such an endoscope treatment tool. In this method, as shown in (a), the diameter of a tube 101 having a lumen 110 is first expanded, and a ring 102 serving as a radiopaque marker is inserted into the expanded portion 106. Tube 1 in this case
The expansion means 01 is performed by heating the tube 101 to such an extent that the tube 101 does not melt, or by mechanically expanding using various tools.

[0005] Next, as shown at 103 in FIG.
The insertion part of the ring 102 in the tube 101 is contracted. This shrinking means is performed by cooling the expansion portion 106 expanded by heating and shrinking the expansion portion 106 to return to the original size, or by returning to the original size by natural elasticity of the tube 101. The expansion portion 106 is for contracting the inner diameter of the radiopaque marker 102 to have an inner diameter equal to or larger than the outer diameter of the radiopaque marker 102.

[0006] Due to this contraction, the convex portion 107 remains in the portion of the tube 101 where the ring 102 is inserted. For this reason, as shown in (c), the convex part 107 is crushed using a mold iron, a clipper, a heating die, or the like, and the tube 101 is crushed.
Flatten the outer surface of the

FIG. 11 shows another endoscopic treatment tool disclosed in Japanese Patent Application Laid-Open No. 8-47538. In this endoscopic treatment instrument, a slide tube 108 is inserted into a catheter tube 109 inserted into a body cavity. The slide tube 108 is axially movable inside the catheter tube 109, and an X-ray opaque mark foil 107 is attached to the outer surface of the slide tube 108 by attaching or winding. If the thickness of the mark foil 107 is too small, the contrast under X-ray transmission becomes poor.
This has an adverse effect on the insertability of the slide tube or the slide movement of the slide tube 108. Therefore, the thickness of the mark foil 107 is 1
It is 0 to 200 μm, preferably 10 to 50 μm.

[0008]

Problems to be Solved by the Invention
In the endoscope treatment tool disclosed in Japanese Patent Application Publication No. 4 (1999) -1995, when a plurality of radiopaque markers 102 are inserted into the inside of the extension portion 106, the extension portion 106 is made longer as shown in FIG. 106, the radiopaque marker 10
2 must be inserted all the way inside the tube 101. Further, the tube 101 used is somewhat bent.

However, the radiopaque marker 1
02 is greater than or equal to the inner diameter of the extension 106, so the radiopaque marker 102 is
When the tube 101 is inserted into the inside, the mouth portion of the radiopaque marker 102 comes into contact with the inner surface of the lumen 110 of the bent tube 101, and the inner surface of the tube 101 is damaged by this contact. Further, when the wire for guiding the tube 101 is inserted through the lumen 110, a problem occurs in which the wire is caught by the wound. Further, although the endoscope treatment tool is washed and used again, there is a disadvantage that it is difficult to remove stains on the scratches on the inner surface of the tube 101 during this washing.

In the treatment tool for an endoscope disclosed in JP-A-8-47538 shown in FIG. 11, a mark foil 107 having a thickness of 10 μm or more is attached to the outer periphery of the slide tube 108. A step occurs with the foil 107. The step thus generated causes a problem that the endoscopic treatment tool is damaged when the endoscopic treatment tool is inserted into the body cavity, or the endoscope treatment tool itself is damaged when the endoscope treatment tool is inserted through the body cavity. I do.

The present invention has been made in view of such a conventional problem, and does not damage a tube having a lumen. Further, the present invention provides two or more radiopaque markers on the tube. An object of the present invention is to provide a method of manufacturing a treatment tool for an endoscope that can be attached without the endoscope.

[0012]

In order to achieve the above object, the invention of claim 1 provides an endoscopic treatment tool having two or more radiopaque markers attached to the outer periphery of a tube having a lumen. A method of manufacturing, comprising using a tubular radiopaque marker having an inner diameter somewhat larger than the outer diameter of the tube, and arranging at least two of the radiopaque markers outside the tube. A step of temporarily fixing the permeable marker to the outer periphery of the tube, and a step of embedding and fixing the radiopaque marker to the outer periphery of the tube,
It is characterized by having.

[0013] In the present invention, the two or more radiopaque markers are temporarily fixed to the outer periphery of the tube in a state of being arranged outside the tube, and then the radiopaque markers are embedded in the outer periphery of the tube. The radiopaque marker can be fixed to the tube without protruding from the tube. Also, the use of a radiopaque marker having an inner diameter slightly larger than the outer diameter of the tube does not damage the tube.

According to a second aspect of the present invention, there is provided a method of manufacturing an endoscope treatment tool in which two or more radiopaque markers are attached to the outer periphery of a tube having a lumen, wherein the outer diameter of the tube is smaller than the outer diameter of the tube. Using a tubular radiopaque marker with a somewhat larger inner diameter, arranging two or more of the radiopaque markers outside the tube and temporarily fixing the radiopaque marker to the outer periphery of the tube; A step of fixing the radiopaque marker by embedding the radiopaque marker in the outer periphery of the tube while rounding the outer peripheral surface of both ends in the longitudinal direction of the radiopaque marker and covering the rounded portion with a part of the tube. , Is provided.

In the present invention, the radiopaque marker is rounded on the outer peripheral surface side, and the radiopaque marker is embedded in the outer periphery of the tube while covering the rounded portion with the tube. A permeable marker can be immobilized on the tube.

[0016]

FIG. 1 shows a radiopaque marker 2;
FIGS. 4 and 5 show a device for temporarily fixing the outer periphery of the
Shows a punching device for embedding the radiopaque marker 2 in the outer periphery of the tube 1, all of which are used in the embodiment of the present invention. The tube 1 has a lumen 1a in the axial direction, and its outer diameter is 1.2 mm and its inner diameter is 1.0 mm. The radiopaque marker 2 is made of a radiopaque metal such as platinum, gold, silver, tantalum, or palladium. This radiopaque marker 2
Has an outer diameter of 1.3 mm, an inner diameter of 1.26 mm, and a thickness of 20
It is formed into a 1.5 μm-wide tube having a width of μm. Therefore,
The radiopaque marker 2 has an inner diameter slightly larger than the outer diameter of the tube 1.

As shown in FIG. 1, the temporary fixing device has a temporary fixing die 4, and a groove-shaped tube guide 5 is formed at the center of the upper surface of the temporary fixing die 4. A groove-shaped temporary fixing punch guide 6 is formed in a direction orthogonal to the tube guide 5, and the temporary fixing punch 3 is slidably inserted into the temporary fixing punch guide 6.

As shown in FIG. 4 and FIG.
A table 7 having a through hole 12 formed in a central portion thereof and rotating by driving a rotation motor (not shown);
A molding unit 15 provided on the table 7. In this embodiment, three molding units 15 are radially arranged at 120 ° intervals around the through hole 12.

Each forming unit 15 includes a servomotor 11, a ball screw 9, and a punch 8. The servo motor 11 is fixed on the table 7, and the ball screw 9 is connected to the servo motor 11 via a coupling 10. The ball screw 9 is rotatably held by a pair of holding plates 16 erected on the table 7.

The punch 8 is mounted on a block 14 mounted on a ball screw 9. The block 14 advances and retreats in the direction of the through hole 12 by the rotation of the ball screw 9,
Thereby, the punch 8 moves forward and backward integrally. This movement is controlled by the servomotor 11, and for example, it can be finely moved forward and backward by 1/1000 mm. A punch surface 8a at the tip end of the punch 8 is formed into a concave curved surface for pressing the radiopaque marker 2.

The thickness of the punch 8 (corresponding to the length of the radiopaque marker 2) is larger than the length of the radiopaque marker 2. Therefore, when the radiopaque marker 2 is crushed and embedded in the tube 1, the radiopaque marker 2 is set so as not to come off the outer peripheral surface of the marker 2 at all times. When the radiopaque marker 2 is embedded in the tube 1, the protruding tube 1 is pressed by the punch 8, whereby a part of the protruding tube 1 is moved to the end of the radiopaque marker 2. Will be covered.

Next, a procedure for manufacturing an endoscope treatment tool according to this embodiment will be described. In this embodiment, the step of temporarily fixing the radiopaque marker 2 to the tube 1 and the step of attaching the temporarily fixed radiopaque marker 2 to the tube 1
And a step of fixing the same.

In the step of temporarily fixing, the core 13 is inserted into the tube 1 as shown in FIGS. Then, a plurality of radiopaque markers 2 having a diameter larger than that of the tube 1 are arranged at predetermined positions on the outer periphery of the tube 1 in which the core bar 13 is inserted. This arrangement is performed, for example, so as to have an interval of 4 mm. The tube 1 is set on the tube guide 5 with the radiopaque marker 2 provided. This setting is performed such that the radiopaque marker 2 coincides with the temporarily fixed punch 3 as shown in FIG.

As shown by arrows in FIGS. 1 and 2, the temporarily fixed punch 3 is formed by a cylinder or the like (not shown).
Is moved forward in the direction of the tube 1, the tip end surface thereof is brought into contact with the outer periphery of the radiopaque marker 2, and the temporary fixing punch 3 is further advanced. Thereby, as shown in FIG. 3, the outer periphery of the radiopaque marker 2 is crushed into an elliptical shape. At this time, since the crushed inner surface portion of the radiopaque marker 2 and the outer surface of the tube 1 come into contact with each other, the radiopaque marker 2 is temporarily fixed at a predetermined position on the outer periphery of the tube 1.

By repeating the above steps sequentially for the other radiopaque markers 2, a plurality of radiopaque markers 2 are temporarily fixed to the outer periphery of the tube 1. After the temporary fixing, the tube 1 is taken out from the temporary fixing die 4 and transported to the next step.

In the step of fixing the radiopaque marker 2 to the outer periphery of the tube 1, as shown in FIG. 5, the temporarily fixed radiopaque marker 2 is set at a position where it is to be molded. This setting is performed with the cored bar 13 inserted through the tube 1.

Next, by driving all the molding units 15 at the same time, as shown by arrows in FIG.
To make the punch surface 8a contact the outer periphery of the radiopaque marker 2. After this contact, the punch 8 is further advanced slightly as shown in FIG. By this advance, the radiopaque marker 2 is embedded inside the wall of the tube 1. At this time, the thickness of the radiopaque marker 2 is slightly crushed by the pressing force of the punch 8, and the thickness is reduced. Thereafter, the punch 8 is retracted.

Next, the table 7 is rotated about 10 degrees in the direction of arrow B in FIG. 4, and after this rotation, the punch 8 is moved forward and backward. By repeating the above steps and rotating the table 7 once, the punch 8 is fed slightly more than in the above-described steps. In this case, since the control is performed by the servomotor 11, the minute movement amount can be easily controlled.

By repeating the above steps, the thickness of the radiopaque marker 2 is reduced, and the thinner radiopaque marker 2 is embedded inside the thickness of the tube 1. As a result, as shown in FIG. 8, the radiopaque marker 2 can be formed into a shape in which the radiopaque marker 2 does not protrude from the outer periphery of the tube 1, that is, a shape having no protrusion.

In such a molding, when the radiopaque marker 2 is crushed and deformed by the punch 8, both ends in the length direction of the marker 2 are also crushed, and as shown in FIG. The outer peripheral surface side of the portion takes on a roundness 2a and is covered with a part 1b of the tube 1 so that there is no step.

The first radiopaque marker 2
After completion of the molding of the second marker and the third marker
, And all the markers 2 are formed.

In this embodiment, the radiopaque marker 2 having an inner diameter slightly larger than the outer diameter of the tube 1 is used. A permeable marker 2 can be attached. Further, the radiopaque marker 2 is embedded in the wall of the tube 1 by advancing the punch little by little, so that the radiopaque marker 2 can be attached without any protrusion on the outer periphery of the tube 1.

[0033]

As described above, according to the first aspect of the present invention, the radiopaque marker is temporarily fixed to the outer periphery of the tube, and then the radiopaque marker is embedded in the outer periphery of the tube. The radiopaque marker can be fixed without projecting from the radiopaque marker. Also, the use of a radiopaque marker having an inner diameter slightly larger than the outer diameter of the tube does not damage the tube.

According to the second aspect of the present invention, the radiopaque marker is rounded on the outer peripheral surface side, and the radiopaque marker is embedded in the outer circumference of the tube while covering the rounded portion with the tube. The radiopaque marker can be fixed to the tube without it.

[Brief description of the drawings]

FIG. 1 is a perspective view of an apparatus for temporarily fixing a radiopaque marker to a tube.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is an enlarged sectional view of a portion A in FIG. 2;

FIG. 4 is a plan view of a punch device for fixing a radiopaque marker to a tube.

FIG. 5 is a sectional view taken along line YY in FIG.

FIG. 6 is a cross-sectional view before fixing a radiopaque marker to a tube.

FIG. 7 is a cross-sectional view of a step of fixing a radiopaque marker to a tube.

8A and 8B show a state in which a radiopaque marker is fixed to a tube, wherein FIG. 8A is a cross-sectional view thereof, and FIG. 8B is a cross-sectional view taken along line ZZ in FIG.

FIG. 9 is a cross-sectional view of the endoscope treatment tool.

10 (a) to 10 (c) are cross-sectional views showing the conventional manufacturing of an endoscope treatment tool in the order of steps.

FIG. 11 is a perspective view of another endoscopic treatment tool.

FIG. 12 is a cross-sectional view illustrating a defect in FIG. 10;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tube 2 Radiopaque marker 2a Round part

Claims (2)

[Claims] 1. A method of manufacturing an endoscopic treatment tool having two or more radiopaque markers attached to an outer circumference of a tube having a lumen, wherein the inner diameter is somewhat larger than the outer diameter of the tube. A step of temporarily fixing the radiopaque marker to the outer periphery of the tube by disposing two or more of the radiopaque markers outside the tube using a tubular radiopaque marker, Fixing the marker by embedding the marker in the outer periphery of the tube. 2. A method of manufacturing an endoscopic treatment tool having two or more radiopaque markers attached to an outer circumference of a tube having a lumen, wherein the inner diameter is somewhat larger than the outer diameter of the tube. A step of temporarily fixing the radiopaque marker to the outer periphery of the tube by disposing two or more of the radiopaque markers outside the tube using a tubular radiopaque marker, Rounding the outer peripheral surfaces of both ends in the longitudinal direction of the marker, and embedding the radiopaque marker in the outer periphery of the tube while covering the rounded portion with a part of the tube, and fixing the same. A method for producing an endoscope treatment tool, characterized by comprising: