JPH0889583A - Method for guiding catheter for medical treatment - Google Patents

Abstract

PURPOSE: To provide a method for guiding a catheter for medical treatment capable of surely and rapidly guiding the catheter to the prescribed position of the organs in a living body CONSTITUTION: The catheter 1 is guided to the required position by injecting magnetic fluid into a balloon 3 of the catheter inserted into the organs 11 in the living body 10 to inflate the balloon, then utilizing the magnetic force generated between the magnetic fluid in the inflated balloon and the magnet arranged on the front surface of the living body at the time of inserting the catheter 1 for medical treatment having the balloon 3 at the front end of a catheter tube body into the organs and allowing the catheter to guide in the prescribed position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for guiding a medical catheter.

[0002]

2. Description of the Related Art Conventionally, a medical catheter as disclosed in, for example, Japanese Utility Model Publication No. 3-16681, has been used for intestinal aspiration and injection of a drug solution in patients with ileus. Since this catheter has a very long length of 2.5 to 3.0 m and is entirely flexible, it is guided by a guide wire to a predetermined position of an organ in a living body in most cases.

[0003]

However, even in the above-mentioned catheter, the catheter is inverted at the upper part of the stomach and it is difficult to insert it into the anus, and the pyloric region between the stomach and the duodenum is not easily removed. I couldn't go through, and it remained as a problem to be solved. Further, in the catheter, since the peristaltic movement of the intestine was the force to advance only after reaching the duodenum to the affected part of the small intestine, the time to reach the affected part is, even if it can pass through the pylorus part at one time. It took a long time, and in case of emergency, he had to open the abdomen and need surgery. Furthermore, when inserting the guide wire for guiding, there are often accidents in which the stomach wall and the intestinal wall are damaged or pierced to get out.

Therefore, the present invention has been made to solve the above-mentioned conventional problems and to provide a method for guiding a medical catheter that can reliably guide a predetermined position of an organ in a living body in a short time. And

[0005]

In order to achieve the above object, the method for guiding a medical catheter according to the invention of claim 1 comprises:
When inserting a medical catheter having a balloon at the tip of the catheter tube body into an organ in a living body and leaving it in place, injecting a magnetic fluid into the balloon of the inserted catheter to inflate the balloon, and then inflating the balloon It is characterized in that the catheter is guided to a required position by utilizing the magnetic force generated between the magnetic fluid in the inside and the magnet arranged on the surface of the living body. A medical catheter guiding method according to a second aspect of the present invention is the medical catheter guiding method according to the first aspect, wherein the magnet is a permanent magnet, an electromagnet, or a superconducting magnet.

[0006]

As described above, the medical catheter having a balloon is inserted into an organ in a living body and then a predetermined force is generated by the magnetic force generated between the magnetic fluid injected into the balloon and the magnet on the surface of the living body. It is guided to the position and placed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a front obstruction type medical catheter showing an embodiment of the present invention, in which (A) is a partially cutaway front view of the distal end portion, and (B) is a front view of the rear end portion thereof. (C) is C-of (A)
It is a vertical side view of the C line. Reference numeral 1 is a medical catheter, 2 is a catheter tube main body made of silicone rubber or the like and having a predetermined length, and a balloon 3 is provided at the tip thereof. Reference numeral 4 denotes a balloon lumen, which is formed parallel to the inner lumen (main lumen) 5 of the catheter tube main body 2 in the axial direction of the main body. Reference numeral 6 denotes a thin branch tube communicating with the lumen 4 for the balloon, and is equipped with an injector (not shown) for injecting liquid such as sterilized water or physiological saline or air into the lumen 4 for the balloon in order to inflate the balloon 3 of the tube 6. A one-way valve (not shown) is provided at the end portion 7 to be opened. Reference numeral 8 is a side hole formed in communication with the inner lumen 5 of the catheter tube body 2.

The operation of this embodiment will be described with reference to FIG.
In FIG. 2, 10 is a living body, 11 is an organ, and 12 is a permanent magnet arranged on the surface of the living body 10. In order to leave the catheter 1 in place in the organ 11, as shown in the figure, an injector is attached to the end 7 of the branch tube 6 of the catheter 1 inserted in the organ 11, and a magnetic fluid is injected into the lumen 4 for the balloon. Then, the balloon 3 is inflated. As the magnetic fluid, for example, about 5 cc of fine iron powder dispersed in physiological saline using a dispersant is used. After the balloon 3 is inflated to some extent,
The attraction force (magnetic force) of the magnet 12 is applied from the surface of the living body 10 through the abdominal wall to the balloon 3 which is made magnetic by the injection of the magnetic fluid. As a result, the balloon 3 of the catheter 1 is attracted by the magnet 12 as shown in the figure. In this state, the magnet 12 is adjusted to the shape of the organ such as the stomach or intestine, or the blood vessel, for example, the left side as shown in the figure. When moved to, the sucked balloon 3 follows the moving magnet 12 and moves as shown by the arrow, and is guided to a predetermined position. The position of the balloon 3 of the catheter 1 in the living body 10 during this guidance can be confirmed and grasped easily by an X-ray device (not shown) or the like because the balloon 3 made of a magnetic material also has contrast properties for X-rays. In addition, it can be confirmed by MRI and ultrasonic waves. When the magnet 12 reaches the predetermined position, the magnet 12 is removed from the surface of the living body 10 to release the suction force on the balloon 3.

Next, the magnetic fluid is removed from the balloon 3 by the above-mentioned injector, and after the removal, the liquid or air is quickly injected to inflate the balloon 3 again. In this case, the amount of liquid or the like is larger than that of the magnetic fluid, and the balloon 3
Is the fixed amount. As a result, the catheter 1 is fixed and placed at a predetermined position.

A magnet for guiding the balloon 3 of the catheter 1.
An electromagnet or a superconducting magnet other than the above-mentioned permanent magnet may be used as the magnet 12, and instead of moving the magnet 12 each time in order to induce the magnet, a plurality of magnets are sequentially magnetized to induce the magnet. Needless to say, it is okay.

[0011]

The invention of claim 1 is as described above,
When inserting a medical catheter having a balloon at the tip of the catheter tube body into an organ in a living body and leaving it in place, injecting a magnetic fluid into the balloon of the inserted catheter to inflate the balloon, and then inflating the balloon Since the catheter is guided to the required position by utilizing the magnetic force generated between the magnetic fluid inside the body and the magnet arranged on the surface of the living body, various catheters can be used for organs inside the living body without the conventional guide wire. It is possible to reliably guide the vehicle to a predetermined position in a short time. In addition, existing catheters with balloons can be easily guided as long as magnetic fluid and a magnet are prepared, so they are easy to carry out and have extremely high practical value. The invention of claim 2 has an excellent effect that the guide of the catheter can be performed from outside the body by an arbitrary magnet.

[Brief description of drawings]

FIG. 1 is a front-closed medical catheter showing an embodiment of the present invention, in which (A) is a partially cutaway front view of the distal end portion, (B) is a front view of the rear end portion thereof, and (C). [Fig. 3] is a vertical sectional side view taken along line CC of Fig. 7A.

FIG. 2 is an explanatory diagram of an operation of the above.

[Explanation of symbols]

 1 Medical Catheter 2 Catheter Tube Main Body 3 Balloon 4 Balloon Lumen 5 Lumen 6 Branch Tube 7 End 8 Side Hole 10 Living Body 11 Organ 12 Permanent Magnet

Front Page Continuation (72) Inventor Atsushi Koiso 2-14-16 Nakata, Chikusa-ku, Nagoya-shi, Aichi Fuji Systems Co., Ltd. Nagoya Branch

Claims (2)

[Claims] 1. When a medical catheter having a balloon at the distal end of a catheter tube body is inserted into an organ in a living body and left in place at a predetermined position, a magnetic fluid is injected into the balloon of the inserted catheter to inflate it. A method for guiding a medical catheter, characterized in that the catheter is guided to a required position by utilizing a magnetic force generated between the magnetic fluid in the expanded balloon and a magnet arranged on the surface of the living body. 2. The method for guiding a medical catheter according to claim 1, wherein the magnet is a permanent magnet, an electromagnet, or a superconducting magnet.