JPS6253673A - Multilument tube - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a multi-lumen tube used for an insertion section of an endoscope, a medical catheter, etc.

[Conventional]

Recently, in endoscope insertion sections, medical catheters, and the like, a plurality of lumens extending in the axial direction are formed within the tube body. A so-called multi-lumen tube has been provided (Japanese Utility Model Publication No. 53-111591).

By the way, when this multi-lumen tube is connected and fixed to the hand-held operating section, a metal connecting ring is inserted between the two and fixed by adhesive.

In addition, the connection between each lumen and the vibe member on the operating section side is made by cutting out a cutout on the side of the tube body of the multi-lumen tube.
This is done by press-fitting a vibrator into this.

[Problems to be Solved by the Invention] However, the above-mentioned conventional system has a complicated connection structure and assembly method, and also has problems in terms of connection strength. In addition, since the connection between each lumen and the pipe member on the operating section side is done by press-fitting the pipe into a notch in the side of the tube body, a sharp bend inevitably occurs in this part. It has been reported that it is difficult to insert light guides and image guides into these, sometimes breaking, and even making it difficult to smoothly insert treatment tools and the like.

The present invention has been made in view of the above-mentioned problems, and aims to simplify and facilitate the connection structure and assembly method, improve the connection strength, and improve the connection between each lumen and the operating section. The purpose of this invention is to smoothly connect the pipe member to the pipe member, to prevent easy and difficult insertion of a light guide or image guide into the pipe member, and to prevent damage thereto, and to enable smooth insertion of a treatment instrument, etc.

[Means and actions for solving the problems] A multi-lumen tube in which a plurality of lumens extending in the axial direction of the tube body are formed within the tube body. @A connecting taper member having a tapered outer circumferential surface that fits into the connecting opening on the operation unit side is provided at the end that connects to the connecting part, and the mutual spacing of each lumen in this tapered member is on the distal end side. The distance between each lumen was widened.

[Embodiment] FIGS. 1 to 3 show a first embodiment of the present invention. FIG. 2 shows a blood vessel endoscope 1.

FIG. 3 shows a medical catheter 2. FIG.

The vascular endoscope 1 shown in FIG. 2 consists of an operating section 3 and an insertion section 4, and the operating section 3 is provided with an eyepiece section 5 and a forceps port 6. Further, a distal end portion 7 is attached to the distal end of the insertion portion 4.

The medical catheter 2 shown in FIG.
and an insertion section 4, and a plurality of pipes 8 are connected to the operation section 3. Further, the tip portion 7 is attached to the tip of the insertion N4 of this medical catheter 2 in the same manner as described above.

Each of the insertion sections 4 is a multi-lumen tube.
11. This multi-lumen tube 11 has a plurality of lumens 13 extending in the axial direction within a flexible tube body 12, and each of the lumens 13 can be used for various purposes. .

For example, it is used for air supply, water supply, insertion of treatment tools, image guides, light guides, etc., balloon air supply, contrast agent injection, etc.

Further, each of the insertion sections 4 constituted by a multi-lumen tube 11 is attached to the operating section 3, respectively, as specifically shown in FIG.

Specifically, what is shown in FIG. 1 is the case of a blood vessel endoscope 1. That is, each lumen 13 shown in FIG. 2 has a treatment instrument insertion channel 14. This is the insertion hole 16 for the image guide 15. Further, the other inner cavity 13 (not shown) is used for supplying air or water, or for inserting a light guide.

Further, at the end of the multi-lumen tube 11 on the operation part 3 side shown in FIG. A member 19 is provided. This tapered member 19 is made of plastic or metal, and has a hole 21 formed in its small diameter end portion into which the proximal end portion of the multi-lumen tube 11 is tightly fitted. Further, as shown in FIG. 1, this tapered member 19 also has a
A plurality of lumens 13 corresponding to the lumens 13 and communicating with each other are formed so as to be integrated and continuous.

Further, the mutual spacing between the lumens 13 of the tapered member 19 is wider than the spacing between the lumens 13 on the distal end portion, and the lumens 13 are formed to expand radially toward the operating portion 3 side.

Further, each lumen 13 of the tube body 12 and each lumen 13 on the side of the tapered member 19 communicating therewith are connected via connection pipes 22, respectively.

That is, the connecting pipe 22 is fixed in advance to the tapered member 19 side, for example. Before assembling the tube body 12, each of the connecting vibes 22 protrudes toward the hole 21, respectively. When assembling the tapered member 19 to the tube body 12, the end of the tube body 12 is inserted into the hole 21 of the tapered member 1g so that each connecting pipe 22 is aligned with each inner cavity 13 of the tube body 12, and the end surface Bring them into close contact. Further, this joint portion is fixed with an adhesive.

Further, a male thread 23 is formed on the outer periphery of the outermost end of the tapered member 19 on the small diameter side. A fixed ring 24 is fitted onto the external thread 23 of this tapered member 19, and
By pressing against the wall portion 25 of the operating portion 3, the outer periphery 18 of the tapered member 19 is pressed and fixed in close contact with the tapered inner surface of the connection opening 17.

Furthermore, a pipe member 26 is connected to the end of each inner cavity 13 of the tapered member 19 on the operating section side. The vibrator member 26 connected to the treatment instrument insertion channel 14 side is connected via another connecting vibrator 27 . Also, a pipe member 26 connected to the insertion hole 16 side of the image guide 15
is partially fitted into the inner cavity 13 and is connected by being supported. In addition.

In the case of the endoscope 1, the treatment instrument 28 may be inserted or removed directly from the inner cavity 13 thereof.

In the vicinity of the tapered member 19, the inner cavities 13 mutually widen toward the operating section 3, making it easy to insert the treatment instrument 28 and the like. The same applies to fluids such as air and water. Furthermore, since each lumen 13 extends radially, it is easy to connect members such as a vibrator to the lumen 13 and to perform piping work. In addition, it is possible to prevent the image guide 15 from coming into contact with other members and breaking as much as possible.

Further, since the tapered outer circumferential surface 18 of the tapered member 19 and the tapered inner surface of the connection opening 17 are fitted in a state of engagement and close contact, relative positioning of the two is easy, and the operation portion 3. Taper member 19 is difficult to fall off. Moreover, since there is no need to perform any special processing on the multi-lumen tube 11 when assembling one tube, two assemblies can be easily and inexpensively manufactured.

FIG. 4 shows a second embodiment of the invention. This embodiment differs in the means for fixing the tapered member 19 to the wall 25 of the operating section 3, and the fixing plate 3 is screwed to the wall 25.
1, the tapered member 19 is pressed from the operating section 3 side.

FIG. 5 shows a third embodiment of the invention. In this embodiment, a vibrator-like protrusion 32 is integrally provided in the hole 21 of the tapered member 19 from the end of each inner cavity 13, or a protrusion 34 is provided by embedding another pipe material 33. be. The protrusion 34 made of this pipe material 33 has a longer protrusion length than the other protrusions 32. and,
When joining the multi-lumen tube 11 to the tapered member 19, the protrusion 34 is first inserted into the lumen 13 on the multi-lumen tube side corresponding to the lumen 13 where the protrusion 34 is located, and assembled by fitting. In other words,
When the multi-lumen tube 11 is assembled into the tapered member 19, its longest protrusion 34 serves as a guide, making positioning and assembly extremely easy.

Note that the longest protrusion 34 may also be formed integrally with the tapered member 19 like the other protrusions 32.

FIG. 6 shows a fourth embodiment of the present invention. In this embodiment, a cross-shaped wedge-shaped partition wall 35 is provided on the end surface of the taper member 19 in the hole 21 to separate the respective inner cavities 13 from each other.

This partition wall 35 is inserted into a notch 36 provided on the end face of the multi-lumen tube 11 and is engaged therewith.

Note that the notch 36 is not necessarily required.

Conversely, the partition wall 35 may be provided on the tapered member 19 side.

Furthermore, the fixing method may be integral molding, adhesive fixing, or the like.

Further, a notch 37 is formed on the outer periphery of the fitting end of the multi-lumen tube 11, and a recess 38 is formed in the inner wall of the hole 21 of the tapered member 19 corresponding to the notch 37 so as to engage them. This allows the tapered member 19 to perform a positioning action when the multi-lumen tube 11 is assembled. In other words, two-position assembly becomes extremely easy.

According to this embodiment, each partition wall 35 isolates fluids and components from each lumen 13 from each other. Moreover, since each of the partition walls 35 extends in the radial direction of the multi-lumen tube 11, the durability against twisting applied to the multi-lumen tube 11 is increased. Also.

There is no need to use pipe material for connection as in the above embodiment. Therefore, the pore diameter of the inner cavity 13 can be effectively utilized.

FIG. 7 shows a fifth embodiment of the present invention. This embodiment has a tapered member 19 and a multi-lumen tube 11.
The end faces of the two are directly fixed to each other. As for the fixing means, both of the above members are made of the same material and fixed by welding. Alternatively, there is a method of fixing with adhesive or other means.

This method requires fewer parts to connect.

It is also easy to assemble the two.

FIGS. 8 and 9 show a sixth embodiment of the present invention. In this embodiment, the end of the multi-lumen tube 11 is press-fitted into the heated molding die 40 shown in FIG. 8 to form the shape of the tapered member 19. Therefore, the multi-lumen tube 11 and the tapered member 19 can be integrated (single body). Therefore, there is no need for a process of connecting the two, which saves time and effort for one assembly. Further, when passing a treatment instrument or the like through the inner cavity 13, it can be easily inserted.

FIG. 10 shows a seventh embodiment of the present invention. In this embodiment, the tapered member 19 is constructed by press-fitting hollow pins 42 each having a tapered outer peripheral surface into the inner cavity 13 at the end of the multi-lumen tube 11. According to this embodiment, the same effects as those of the sixth embodiment described above are achieved, and the tapered member 19 can be easily made and manufactured at low cost.

〔Effect of the invention〕

As explained above, according to the present invention 1, the structure for connecting the multi-lumen tube to the operating section can be simplified,
Moreover, the assembly work can be facilitated. Furthermore, since a tapered member is used, the connection strength can be improved. In addition, each lumen expands toward the operating section, so
It can be smoothly connected to the operating part side member, and light guides and image guides can be easily inserted into this inner cavity, preventing damage to them, and allowing smooth insertion of treatment instruments, etc. be able to.

[Brief explanation of drawings]

FIG. 1 is an enlarged cross-sectional view of the connecting portion of the first embodiment. FIG. 2 is a side view of an endoscope using the first embodiment, FIG. 3 is a side view of a catheter also using the first embodiment, and FIG. 4 is a side view of the endoscope using the first embodiment. FIG. 5 is an exploded sectional view of the connection portion of the third embodiment, FIG. 6 is an exploded perspective view of the connection portion of the fourth embodiment, and FIG. 7 is an exploded sectional view of the connection portion of the fourth embodiment. FIG. 8 is an explanatory diagram of forming the connecting end of the multi-lumen tube of the sixth embodiment, and FIG. 9 is an enlarged cross-sectional view of the connecting section of the sixth embodiment. , FIG. 10 is an enlarged sectional view of the connection portion of the seventh embodiment. DESCRIPTION OF SYMBOLS 1...Multi-lumen tube, 12...Tube body, 13...Inner cavity, 19...Tapered member, 19...
...Outer surface. Representative Patent Attorney Jun Tsuboi Figure 1 @ Figure 2 Figure 3 Figure 4 Figure 7 Figure 8 Figure 9 Figure 10

Claims (1)

[Claims] In a multi-lumen tube formed by forming a plurality of lumens extending in the axial direction within the tube body, the end connected to the operating section has a tapered outer peripheral surface that fits into the connection opening on the operating section side. 1. A multi-lumen tube characterized in that a connection taper member is provided, and the distance between the lumens in the tapered member is wider than the distance between the lumens on the distal end side.