JPH0451805Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a medical indwelling tube, and more specifically, to a medical indwelling tube that is inserted endoscopically into the body and left in a desired position. It is.

[Prior Art] A medical indwelling tube is also called a drainage tube and is well known. Conventional medical indwelling tubes of this type include, for example, the insertion end of a flexible tube consisting of a main lumen and a sub-lumen that communicate with each other at the distal end, as shown in Japanese Unexamined Patent Publication No. 59-151969. The portion is formed as a curved portion, and at least one opening is provided inside the portion, and the tip thereof is completely closed by a sealing stopper.

When using the tube, when inserting it into the body, insert a straight stylet etc. into the main lumen and insert it to the indwelling position with the curved part at the tip of the tube in a straight line, then pull out the stylet etc. and bend the tube. The curved section is restored and placed in that position to prevent it from slipping out, and the fluid inside the body is discharged from the body through an opening provided on the inner surface of the curved section through a side lumen.

[Problem to be solved by the invention] However, in the conventional indwelling tube as described above, the curved part is stretched into a straight line by a stylet etc. when inserted into the body, but at this time, the opening provided inside the curved part is Since the tube will be stretched in the longitudinal direction, not only will the hole be cut, which may cause buckling, but the stretching of the hole will create an uneven surface on its circumferential surface, making it difficult to insert the tube into the body. There was also the fear that it would cause a catch. In addition, when the indwelling tube is inserted into the body, the curved part is once stretched with a stylet, etc.
Although the shape will be restored as soon as the stylet is removed, it will not completely return to its original shape, and the shape of the opening will not be the perfect circle as it was when it was initially set, and the opening area will become smaller, which will impede the drainage effect. Ta.

The present invention has been developed in order to eliminate the drawbacks of conventional indwelling tubes of this type as described above, and to prevent the curling part (curved part) from temporarily becoming straight due to a stylet etc. when inserted into the body. The object of the present invention is to provide a medical indwelling tube that does not cause buckling or the like due to cuts in the openings provided in the curling portion, and ensures a drainage effect. do.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a medical indwelling tube that is endoscopically inserted into the body and indwelled at a desired position. In each curling part provided in a circle,
It is characterized in that one or more openings are formed in a direction perpendicular to the plane of the circle forming the curling.

[Function] By providing the holes in the curling part in this way, even if the indwelling tube is temporarily straightened by a stylet, guide wire, etc. when inserted into the body, each hole can be stretched in the direction in which it is stretched. On the contrary, the deformation occurs in the direction of compression, so the apertures are no longer forced to be pulled as in the conventional case, and there is no risk of cuts or unevenness occurring in the apertures.

[Example] Hereinafter, the present invention will be explained based on the illustrated example.

FIG. 1 is a plan view of a medical indwelling tube showing a first embodiment of the present invention. This medical indwelling tube 1 has circular curling parts 2 symmetrically formed on both left and right ends, and has elasticity and flexibility, and allows its position to be confirmed by X-ray when inserted into the body. The tube is made of polyethylene resin containing a contrast agent. In the curling part 2, one or more openings 3 are bored on one side (the front surface in the figure) of the tube in a direction perpendicular to the plane of the circle forming the curl. The diameter of this opening 3 is equal to or smaller than the inner diameter of the tube 1 . Further, each distal end of the curling part 2 is provided with a tapered part 4 to improve insertion into the body.

When the medical indwelling tube 1 of this embodiment formed in this manner is used, the guide wire 6 is inserted through the distal opening 5 as shown in FIG.
is inserted, and the curling portion 2 is stretched into a straight line and inserted into the body. When the curling portion 2 is stretched linearly in this way, a force is applied to each opening 3 in the direction of compressing it toward the center, as shown in FIG. Therefore, the fear of tube breakage or the like occurring due to the opening being forcibly pulled and expanded to both sides as in conventional indwelling tubes is completely eliminated, and the drawbacks caused by this are completely eliminated.

Then, the curling portion 2 is stretched linearly in this way, and the indwelling tube 1 is inserted endoscopically into a target site (such as a stenotic site) in the body, as shown in FIG. 4, for example. That is, the guide wire 6 is inserted into the treatment instrument insertion channel 8 of the endoscope 7, and the distal end of the guide wire 6 is passed through the stenosis 10 at the target site in the body, and then the indwelling tube 1 is inserted using this as a guide. It is pushed into the narrowed part 10 by the pusher tube 9. Next, when only the guide wire 6 is pulled out to the proximal side, the curling part 2 of the indwelling tube 1 returns to the state shown in FIG. can be fully achieved.

It should be noted that the opening 3 in the above-mentioned indwelling tube 1 is not limited to a round hole, and may of course be made into any shape such as a triangle, square, or star shape, and even if this is done, tube breakage etc. may occur. Never.

FIG. 5 is a plan view of a medical indwelling tube showing a second embodiment of the present invention. This medical indwelling tube 1A also has curling portions 2A symmetrically on both left and right ends like the indwelling tube 1 shown in FIG. The only difference is that every other aperture 3 is provided alternately on the front and back surfaces in the figure. By providing the openings 3 on both the front and back surfaces of the indwelling tube 1A in this manner, the strength of the curling portion 2A is not weakened, and the fluid inside the body can be more efficiently discharged to the outside of the body.
The drainage effect can be improved accordingly.

[Effects of the invention] As explained above, according to the invention, even if a medical indwelling tube having a curling part temporarily becomes straight when inserted into the body, the opening provided in the curling part remains intact. There is no risk of buckling or the like occurring due to cuts, etc., and furthermore, when the curled portion is restored, the original shape of the opening can be ensured, and a good drainage effect is exhibited. Therefore, it is possible to provide a medical indwelling tube that completely eliminates the drawbacks of conventional indwelling tubes of this type.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a medical indwelling tube showing a first embodiment of the present invention, and FIG. 2 is a plan view showing the medical indwelling tube of FIG. 1 before being inserted into the body. FIG. 3 is a plan view for explaining the compressive force applied to the aperture portion when the curling portion of the medical indwelling tube shown in FIG. 1 is stretched linearly when inserted into the body; The diagram is
FIG. 5 is a schematic diagram showing an example of the procedure for inserting the medical indwelling tube into the body in this embodiment. FIG. 5 is a plan view of the medical indwelling tube showing the second embodiment of the present invention. 1 , 1A ... Medical indwelling tube, 2... Curling part, 3... Hole opening.

Claims (1)

[Scope of Claim for Utility Model Registration] A medical indwelling tube that is endoscopically inserted into the body and indwelled at a desired position, which has a plurality of openings arranged in parallel near the ends, at both ends of the tube. 1. A medical indwelling tube, characterized in that curling portions each having a circular shape are provided, and the plurality of openings are perforated in a direction perpendicular to the plane of the circle forming the curling.