JPH0341716Y2 - - Google Patents

Description

[Detailed explanation of the invention] <Industrial application field> This invention is useful for collecting fluid accumulated in body cavities,
Conversely, when treating by injecting liquid into a body cavity from outside the body or applying stimulation from outside the body, when diagnosing organs such as the urethra or bladder, or when monitoring physical and chemical internal information. The present invention relates to a balloon-equipped catheter that has a balloon added to the distal end of the catheter used for such purposes, and particularly facilitates insertion work.

<Prior art> Conventionally, when a catheter is inserted into a small-diameter and curved tubular tissue such as a blood vessel or bile duct in a body cavity, the tip portion 1 of the catheter digs into the tubular tissue 20, as shown in FIG. It became impossible to continue insertion.

Therefore, as shown in FIG. 13, the distal end portion 1 of the catheter is formed into a round shape to prevent the catheter from digging into the curved portion of the tubular tissue.

<Problems to be solved by the invention> Catheter tip 1 at the curved part of the tubular tissue
The cutting into the tubular tissue 20 can be prevented by making the catheter tip 1 rounded. but,
Depending on the type of catheter, the tip cannot be made round, and in that case, it is not possible to prevent the catheter from digging into the catheter.

In addition, if the tubular tissue is branched, for example, the 15th
As shown in the figure, when the direction of movement of the catheter is bifurcated, when the catheter is inserted into the tubular tissue 21, the catheter tip 1 tends to move straight, so that it is inserted in the direction of arrow B in the figure. If it is desired to insert the catheter tip 1 in the direction of arrow A, the catheter tip 1 inserted in the direction of arrow B is moved back and then advanced. This process of retreating and moving forward was repeated until the catheter tip 1 was luckily inserted in the direction of arrow A, or the catheter could not be inserted in the direction of arrow A and there was no choice but to give up.

In addition, since the actual tubular tissue is branched, in order to insert the catheter tip 1 into the desired tissue, it is necessary to insert the catheter tip 1 into the desired tissue at multiple locations, or at multiple locations as shown in FIG. It must be inserted in the appropriate direction within the multi-branched tubular tissue. As mentioned above, if the catheter tip 1 was inserted by repeatedly moving forward and backward at the bifurcation of the tubular tissue, this operation would be required many times, and it would take a long time to insert it into the desired tissue. It was.

This device eliminates the above-mentioned drawbacks of conventional catheters by attaching a balloon that can be inflated and deflated in one direction to the side near the tip of the catheter, making it easier to insert the catheter into the desired tubular tissue. The purpose of the present invention is to provide a catheter with a balloon.

<Means for solving the problems> The configuration of the present invention to achieve the above object is as follows.

A balloon-equipped catheter characterized in that it has a balloon that expands to the side of the distal end portion of the catheter, and the balloon has a cylindrical rubber-elastic membrane that has a membrane thickness on the operating hole side of the balloon. It is made thinner than the film thickness of the cylindrical part, and is formed by gluing both ends of the cylinder.

<Operation> With this configuration, the tip of the catheter can be directed in a desired direction by expanding and contracting the balloon.

<Example> An example of this invention will be described in detail with reference to the drawings. Fig. 1 is a configuration diagram of a catheter with a balloon according to an embodiment when the balloon is contracted, Fig. 2 is a sectional view along A ₁ - A ₂ of Fig. 1, and Fig. 3 is a diagram of the balloon of the embodiment of Fig. 1. It is a block diagram when expanded. The balloons of the embodiments shown in FIGS. 1 to 3 are made of a rubber-elastic membrane. FIGS. 4, 5, and 6 are explanatory views of the catheter of the present invention being inserted into a tubular tissue.

1 is the tip of the catheter, 2 is the catheter hole, 3
is a catheter hole connector, 4 is a balloon, 5 is a balloon operation hole, 6 is a balloon operation connector,
7 is a cylindrical rubber elastic membrane with uniform thickness;
8 is an adhesive part, 9 is a cylindrical rubber-elastic membrane with uneven thickness, 10 is a cylindrical rubber-elastic membrane, 11 is a fiber, 20 is a curved tubular structure, 21
is a branched tubular tissue.

The structure of the balloon that expands greatly in only one direction according to the present invention will be described below.

The embodiments shown in FIGS. 1, 2, and 3 are examples in which a cylindrical rubber-elastic membrane 9 with an uneven thickness is attached to the catheter distal end 1 with adhesive portions 8 at both ends thereof. In this case, it is desirable that the membrane has only one thin portion and that this portion coincides with the opening of the balloon operation hole. When fluid is injected into such a balloon through the balloon operation hole 5, the balloon has a different film thickness, which causes a difference in extensibility of the balloon, causing it to expand significantly in only one direction.

Next, the operation of the balloon-equipped catheter of this embodiment will be explained.

When a catheter is inserted into a small-diameter, curved tubular tissue, the catheter tip 1 becomes wedged into the tubular tissue 20, as shown in FIGS. 4 and 8. In this case, the catheter is moved back a little, then the catheter is rotated so that the balloon 4 faces in the direction in which the catheter tip 1 bites, and then the balloon 4 is inflated. FIG. 5 shows the inserted state of the catheter at this time. In this state, the catheter tip 1 does not bite into the curved tubular tissue, so the catheter can be advanced.

Next, the case where a catheter is inserted into the bifurcated tubular tissue 21 shown in FIG. 9 will be described. That is, as shown in FIG. 6, the catheter is rotated so that the balloon 4 faces in the opposite direction to the desired insertion direction, and then the balloon 4 is inflated. If the catheter is advanced in this state, it can be advanced in the desired direction of arrow A in the figure. In this way, the direction of movement of the catheter can be changed by inflating the balloon 4, so even in a tubular tissue that is branched into more than two branches, the catheter can be inserted in a desired direction by controlling the inflation of the balloon 4.

Furthermore, although not shown in the drawings, there is a catheter incorporating a fiberscope in order to provide the catheter with the function of observing the inside of a tubular tissue. Even if such a catheter is inserted into the curved tubular tissue 20 shown in FIG. 4, unless a balloon is incorporated, the field of view is only the wall immediately in front. However, the fifth
As shown in the figure, by incorporating a balloon and controlling the expansion of the balloon, the field of view can be changed to a desired direction, thereby expanding the ability to observe the inside of the tubular tissue.

<Effect of the idea> The present invention has the following effects.

1. A catheter can be easily and quickly inserted into a desired location within a small-diameter tubular tissue, especially a branched tubular tissue.

2. When inserting a catheter into a small-diameter, curved tubular tissue, the catheter can be easily inserted into a curved tubular tissue without having to make the tip of the catheter round.

3 By incorporating a fiberscope into the catheter, it is possible to change the direction of the field of view within the tubular tissue.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of a balloon-equipped catheter according to an embodiment of the present invention when the balloon is contracted, Fig. 2 is a sectional view taken along A ₁ - A ₂ of Fig. 1, and Fig. 3 is an embodiment of Fig. 1. 4, 5, and 6 are illustrations of the catheter of the present invention being inserted into a tubular tissue, and FIGS. 7, 8, and 9 are diagrams showing the configuration when the balloon is inflated. 1 is an explanatory diagram of an insertion situation in which a conventional catheter is inserted into a tubular tissue. In the drawings, 1 is a catheter tip, 2 is a catheter hole, 4 is a balloon, 5 is a balloon operation hole, 8 is an adhesive part, 9 is a membrane, 20 is a curved tubular tissue, 21
1 is a branched tubular tissue, 1 is a direction in which the tip of the catheter enters, and 2 is a direction in which the tip of the catheter enters.

Claims (1)

[Scope of utility model registration request] In a catheter with a balloon, which has an inflatable balloon on the side of the tip of the catheter, the balloon is a cylindrical rubber-elastic membrane, and the thickness of the balloon on the operating hole side is equal to the thickness of other parts. 1. A catheter with a balloon, characterized in that it is made thinner than the cylindrical tube, and is formed by gluing both ends of the cylindrical tube.