JPS6050464B2 - multi-tube catheter - Google Patents

Description

[Detailed Description of the Invention] Conventionally, catheters shown in Fig. 1A are used for cleaning internal organs of the body or injecting medicine while draining body fluids.
Double-lumen (two 40 mm) or triple-lumen (one 40 mm) catheters as shown in , B, C, and D have been used.

As can be easily seen from the figure, the location of the outlet and discharge port is determined by the catheter and is immovable, so the type of organ, its size, the location of the affected area in the organ, Depending on the type of catheter, catheters of different sizes and shapes must be used, and if the caliber is also taken into consideration, an extremely large number of catheters must be prepared. Furthermore, if the relationship between the organ opening into which the catheter is inserted, or the position of the stoma, and the affected area is poor, it may be difficult to reach the end of the catheter no matter how you try. In order to avoid the above disadvantages, or if it is difficult to use the catheters mentioned above, it is recommended to first insert a thin tube with a tip that is easy to bend, and after reaching the affected area in the organ, insert the thin tube into the body of the thin tube. A method of inserting a wood tube into the body that can accommodate this thin tube while securing the outside, and using the wood tube for drainage, or vice versa, a method of inserting the wood tube first and inserting the thin tube later. etc. can be mentioned.

The problem in this case is that in order to prevent the drainage from the wood pipes from dripping, a double pipe joint as shown in Figure 2 is connected to separate the drainage; In this case, the connection could not be made without shifting either the wood tube or the thin tube, which often resulted in the catheter being positioned at the affected area being displaced or giving unnecessary stimulation to the affected area. Furthermore, the inside of this double pipe joint is likely to be unsanitary and difficult to clean. An object of the present invention is to make the relative positions of the plurality of 40 in-body openings variable in the existing catheter, which are fixed, and to eliminate the need for a double tube joint.

The gist of this invention is a multi-tube catheter in which one or several inner tubes are built into an outer tube, in which both ends of the inner tube pass through the ends of the outer tube or through openings drilled in the wall of the outer tube, and The elastic lip-like piece provided along the inner periphery of one or both of the passage ports is brought into close contact with the outer wall of the inner tube.

Embodiments of the present invention will be described based on the drawings.

In FIGS. 3A and 3B, a through hole 4 is bored through the tube wall 3 of the outer tube 1 obliquely. The through hole 4 of the outer tube is larger than the outer diameter of the inner tube, and is closed so as not to obstruct passage of the inner tube. A highly elastic lip-like piece 5 is provided on the inner periphery of this through-hole, and the outer wall of the inner tube is in close contact with this lip-like piece. The elastic lip is made of the same material as the outer tube of the catheter, or of a different material, flexible rubber, or soft plastic, and its shape is such that the inner tube crosses the outer wall of the catheter so that it is in close contact with the outer wall of the inner tube. The opening has a similar shape that is equal to or smaller than the actual cross section.

The lip-shaped piece can be provided on the outside, inside, or from the inside to the outside of the outer tube wall opening, as shown in FIGS. 4A, B, C, D, E, F, and G. In Figure 5, the outer tube is T-shaped.
A lip-like piece is provided at the end of a horizontal tube.

FIG. 6 shows a device in which lip-like pieces are provided at the openings provided in the inner tube end of the outer tube and the outer tube wall. As other embodiments of the present invention, an outer tube having one or two additional ports is used (FIG. 7), a plurality of inner tubes are used (FIG. 8),
There are cases where an inner tube with a special structure is used (FIG. 9A, B, and C). Since the present invention has the above-described structure, the liquid flowing in the outer tube does not leak out from the opening of the inner tube because of the watertightness due to the elasticity of the lip.

Therefore, while preventing the liquid inside the tube from leaking into the body, it is possible to easily slide the inner tube using the elasticity of the lip-like piece and adjust the relative position of the inner and outer tubes, as shown in FIG. It is also possible to separate the liquid inlet and drain port in this way. In addition, in normal use, if several types of outer tubes and several types of inner tubes are prepared, catheters of many shapes can be obtained by combining them, and multiple catheters can be used inside the body. The relative positions of the openings can be freely adjusted according to the shape and size of the affected organ;
In fact, it corresponds to dozens of different types of catheters, and its economical effects are significant.

In addition, it can be combined with shapes that cannot be obtained with conventional catheters, and can be inserted into the body to suit the affected area, and its position can be changed internally depending on the symptoms after insertion. In this case, it is more preferable to make the inner and outer tubes from X-ray projecting materials), which has great therapeutic and medical effects.

Furthermore, if the catheter of the present invention is used when a conventional double tube is used in combination with a joint, the inner tube can be prevented from slipping inside the body, or pain caused to the patient can be prevented, and the catheter can be easily and quickly removed. If the inner tube can be attached and the opening position of the inner tube inside the body is to be changed later, according to the conventional method, if the mutual positions of the inner and outer tubes are different, the inner tube is removed once and another inner tube is inserted. However, the catheter of the present invention had to be jointed to match the length, which took a long time.
(as is) can be easily operated from the outside.

In particular, when bending the inner tube inside the body, a metal or hard plastic wire called a stylet is inserted into the inner tube. Although operation is extremely difficult, in the catheter of the present invention, the stylet can be easily inserted and operated in both the inner tube and the outer tube.

[Brief explanation of the drawing]

Figures 1A to D are sectional views of main parts showing the structure of a conventional catheter, Figure 2 is a conceptual diagram of a double tube joint, Figure 3 is a sectional view of main parts of an embodiment of the present invention, and Figure 4 is an external view. 5 to 9 are sectional views of main parts of other embodiments of the present invention, showing the appearance of a lip-like piece provided at an opening in a tube wall. 1...Outer tube, 2...Inner tube, 3...Outer tube wall, 4.
... Perforation, 5... Lip-shaped piece, 6... Balloon.

Claims (1)

[Claims] 1 Consisting of an outer tube and an inner tube that is inserted into this tube and has a hole bored in the tube end of the outer tube or the tube wall of the outer tube as a passage port, and an elastic tube provided on the inner periphery of the passage port in one or both of the passage ports. A multi-tube catheter characterized by close contact between the lip-like piece and the outer wall of the inner tube.