JPH0385179A - Medical balloon catheter - Google Patents

Abstract

PURPOSE:To reduce the invasion properties to a patient by making the size of a catheter tube fine by providing a main lumen having an inflatable balloon at the leading end part thereof, reduced in the inner diameter of the leading end part thereof and having a side hole in the vicinity of the rear end part of the balloon and a lumen opened to the balloon on the leading end side thereof and having a fine tube provided with a check valve connected to the rear end thereof. CONSTITUTION:A catheter tube 1 has a main lumen 9 injecting a contrast medium or a liquid medicine and a lumen 8 for inflating a balloon. A guide wire is inserted in an objective region and the rear end of the guide wire is inserted in the main lumen 9 of the catheter tube 1 and the catheter tube 1 is guided to the objective region to be inserted and stayed. The guide wire is drawn out of the catheter tube 1 and a stiletto 3 is inserted in the tube 1 and the leading end part of the main lumen 9. A fluid is injected from a check valve 6 through the lumen 8 to inflate the balloon 1 to block blood and, thereafter, the contrast medium is injected in the main lumen 9 from the side hole 12 thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention mainly relates to a balloon catheter that is placed in a blood vessel and injects a contrast medium, a liquid medicine, etc.

[Conventional technology]

2. Description of the Related Art Conventionally, catheters for angiography or injection of various drugs have been frequently used for the purpose of diagnosis and treatment. for example,
When an abnormality such as stenosis of a blood vessel occurs due to some reason, a contrast agent can be injected from the upstream side of the blood flow and the degree of stenosis can be diagnosed using an X-ray monitor etc. Normally, this type of application is used. For this purpose, many types of catheter tubes each having a single lumen are commercially available.

On the other hand, there are cases where an abnormality occurs in one side of the branched blood vessel, and this portion is selectively imaged.

In such cases, a catheter with a balloon is used to temporarily block blood flow to the other branched blood vessel.
A method of injecting a contrast medium is used. Therefore, for this purpose, as shown in Figure 3, two internal lumens are used: a lumen (8) for inflating the balloon and a main lumen (9) for injecting the contrast medium. A balloon catheter (L) with a lumen is required. Here, the main lumen (9) through which the contrast medium is injected is also used to pass a guide wire for guiding the balloon catheter from outside the body into the blood vessel.

However, in some cases, it may be necessary to inject the contrast medium to the rear end of the balloon.
In addition to the main lumen (9) for inserting the guide wire, three lumens are required, including the lumen (10) used for contrast agent injection.

On the other hand, when inserting and indwelling a catheter into the body, a catheter as thin as possible is desired in order to reduce invasion to the patient. However, as mentioned above, the number of lumens is required depending on the purpose of use, and there is a limit to reducing the number of lumens.If the catheter were simply made thinner, the lumen would become thinner, and as a result, the contrast agent There were problems such as increased resistance during injection and difficulty in inserting the guide wire.

[Problem to be solved by the invention]

The present invention attempts to solve these problems with catheters, and its purpose is to provide a catheter while retaining its original functionality.

[Means to solve the problem]

That is, the present invention has a telescopic balloon at the tip, an opening that communicates with the tip and the rear end, the inner diameter of the tip is small, and a side hole that opens near the rear end of the balloon. a catheter tube having a main lumen with a female luer connector attached to its rear end, and a lumen opening into the balloon at its distal end and connected to a thin tube having a check valve at its rear end; This medical balloon catheter is characterized in that it is comprised of a stylet that has a male luer connector attached to its rear end and is used by being inserted into the main lumen.

Hereinafter, a more detailed explanation will be given using FIG. 1, which also serves as an embodiment of the present invention.

The catheter tube (1) in the present invention is made of a soft resin such as polyvinyl chloride or polyurethane, but is not particularly limited to these materials. (9) and a lumen (8) for balloon inflation, and other lumens can be set as necessary.

The tip of the main lumen (9) has its inner diameter reduced by appropriate means as shown in Figure 1, and the stylet (3)
The passage can be easily occluded with its tip by inserting it. On the other hand, there is a female luer connector (7
) are glued and attached.

The stylet (3) to be inserted into the main lumen (9) may be made of resin such as polyvinyl chloride, fluororesin, or metal wire such as stainless steel, but is not particularly limited thereto.

It is also possible to make the tip (4) of the stylet (3) into a knob-like shape as shown in Figure 1. In this case, the main body of the stylet (3) can be made thinner, so that it can resist the injection of contrast media, etc. This is very suitable as it reduces the amount of Furthermore, by forming the distal end (4) of the stylet (3) from a rubber-like soft material, the occlusion of the distal opening of the catheter tube (1) can be improved. Stylet (3) has 2 points at the rear end.
A male luer connector (5) such as a stopcock is attached and attached, so that liquid can be injected from the other injection port of the stopcock.

Next, a method of using the medical balloon catheter according to the present invention will be explained. A percutaneous or incisional method is used to insert the catheter into the desired site within the body. In either method, first insert the guide wire to the target site, then insert the rear end of the guide wire into the main lumen (9) of the catheter tube (1), and insert the catheter tube (1) along the guide wire. Guide it to the target site, insert it, and leave it in place. Therefore, at this time, the stylet (
3) has not been inserted yet. Next, the guide wire is pulled out from the rear end of the catheter tube (1), and the stylet (3) is inserted in its place to occlude the distal end of the main lumen (9) as shown in FIG. Here, fluid such as physiological saline is injected from the check valve (6) through the inner cavity (8) to inflate the balloon (2) and block the blood flow, and then The side hole (9) of the main lumen (9) provided in
12) Inject a contrast agent, etc.

[Effects of the Invention] According to the present invention, the number of lumens can be reduced without impairing the original function of the catheter, making it possible to keep the outer diameter of the catheter tube small, thereby reducing invasiveness to the patient. It is extremely useful in the medical industry.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the entire catheter tube according to an embodiment of the present invention, and FIG. 2 is a sectional view showing the distal end portion of the catheter tube shown in FIG. 1 in use. Furthermore, FIGS. 3 and 4 are cross-sectional views of conventional catheters.

Claims (1)

[Claims] (1) It has a telescopic balloon at its tip, is open in communication with the tip and rear end, has a small inner diameter at the tip, and has a side hole opened near the rear end of the balloon;
a catheter tube having a main lumen equipped with a female luer connector at its rear end, a lumen opening into the balloon at its distal end and connected to a thin tube having a check valve at its distal end; A medical balloon catheter comprising a stylet having a male luer connector attached to the end and used by being inserted into the main lumen.