JPH0417161Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a balloon catheter that is inserted into the rectum and used for intestinal examination, evacuation of intestinal contents, reconstruction surgery, etc. This invention relates to a balloon catheter suitable for people with weak contractions of the anal sphincter, such as those with lower body paralysis.

(Issues to be solved by conventional technology and ideas) In recent years, with the spread of Western-style eating habits, the incidence of colon cancer has been increasing, and as the population continues to age, enema imaging, along with colon fiberscope, has It has become an important test indispensable for discovery. The demand for contrast enema examinations continues to increase year by year, and the frequency of contrast enema examinations, especially for elderly people, is increasing. At the same time, various obstacles associated with testing are becoming a major problem in daily medical treatment.

As a balloon catheter used for this test,
There are two types of catheters, one with one cuff part and the other with two cuff parts (double type), but these conventional catheters can only send 30 c.c. (If the axial diameter of the cuff part is 13 mm, the inflated diameter of the cuff part is about 4 cm.) Therefore, in elderly patients with reduced contractile force of the anal sphincter muscle or patients with paralysis of the lower body, the catheter may not be inserted during imaging. They often fall off, and the contrast medium leaks out and contaminates the imaging table and examination clothes, and the contamination of the contrast medium causes considerable damage, requiring time and expense for overhaul. Furthermore, if the catheter falls out during imaging, the air injected into the large intestine and the contrast medium will leak, making it impossible to obtain a correct image and reducing the diagnostic value by half.
In particular, barium dries quickly, so even if the catheter is inserted again after it has fallen off and a contrast agent is injected, it is difficult to photograph the details of the mucous membrane of the large intestine. Furthermore, repeating radiographs over and over again increases radiation exposure and takes a long time.Especially for elderly patients who are unable to change their positions on their own, not only does it require a great deal of effort for assistance, but it is also extremely difficult for the patient. It becomes painful.

In addition, the above-mentioned contrast agent emits a foul odor when mixed with mucus and is difficult to remove even when wiped clean.If the contrast agent is found to have fallen off during imaging, the nurse must immediately remove the patient's examination clothes and clean the patient's dirty body and imaging table. In addition, to get rid of the smell in the photo studio, we open the entrance door and spray odor-eliminating spray. Furthermore, if a hospital does not have a shower for patients, patients are taken to a changing room after the test and the contrast agent stuck to their skin is wiped off with warm disinfectant, which can cause mental stress to the patient. It is giving a targeted blow.

(Means for Solving the Problems) The present invention was developed by making the cuff part of the balloon catheter approximately 4 cm in length, and by making the cuff part of the balloon catheter approximately 70 cm in length, based on a number of prototype studies based on medical evidence as a person involved in intestinal examinations. They came up with the idea that all they had to do was inflate the catheter by injecting air into it, which made it possible to prevent the catheter from being pulled out and also prevent the leakage of intestinal contents such as contrast media. .

(Example) The illustrated one shows an enema catheter used for examining the intestines. The catheter body 1 has a shaft portion 2 and a cuff portion 3, the shaft portion being made of a material with appropriate stiffness and softness such as silicone, polyvinyl chloride, polyethylene, polyurethane, etc., and the cuff portion being made of silicone rubber, It is made of an inflatable material such as soft polyvinyl chloride, polyvinyl acetate, latex rubber, etc. In the illustrated example, the shaft part is made of the silicone mentioned above, and the cuff part is made of silicone rubber.

The shaft part shown above is 1.3cm (Fr36)
The length of the tip 4 is about 1.5 cm,
A cuff portion having a length of about 4 cm is formed from this. The shaft portion may be formed to have various other diameters.

The catheter is inserted into the rectum 6 through the anus 5, and approximately 70 c.c. of air is injected through the air injection port 8 having the valve 7 using an air injection syringe 9, etc., and the air is passed through the air flow path in the shaft. Pass through 10 and enter the cuff section,
The diameter of the cuff expands to approximately 6 cm (Figure 1). As a result, the cuff portion adheres closely to the wall surface within the rectum and does not come off during use.

Next, a contrast agent and air are sent into the intestine from the injection port 11 in the shaft portion through the flow path 12, and the intestine is photographed. An outlet 13 is formed in the tip of the shaft, and in this case, a hole 14 is also provided on the side. The distal end of the tip, the outlet, and the circumferential surface of the side hole 14 are rounded to ensure smooth insertion and avoid damaging the intestinal wall.

After the examination, the contrast medium and air in the intestine are collected, the air in the cuff is discharged, and the rear catheter is removed.

The above-mentioned chip is formed integrally with the shaft of a material with a specific gravity higher than that of the material of the shaft, and has contrast properties.
This allows you to check the location of the chip when taking pictures. Further, a line 15 made of the same material as the tip is provided on the side surface of the shaft. The chips and lines are colored green or other appropriate color.

FIG. 3 shows a case where a metal is provided on the tip part, and the position of the tip is confirmed by this when taking pictures. In this case, the position may be confirmed by fitting a metal wire or a metal piece into the chip portion and the line, applying a metal liquid, or mixing metal powder. If the shaft is made transparent or translucent, blood, contents, etc. mixed with the contrast medium can be seen when collecting the contrast medium.

A scale 19 is appropriately provided on the side surface of the shaft portion.

When we tested 173 patients using the above catheter, not one of them fell out during imaging. In addition, 22 out of 173 patients had contrast agent leakage along the side wall of the catheter during catheter placement, and 17 of these had only a small amount of leakage from the side wall, and 3 had leakage from the examination clothes or imaging table. Contamination was confirmed.
Two of these three cases were of the same patient, who had difficulty moving and required full assistance, and was extremely thin and had a relaxed anal sphincter; the second case was also a patient who had become extremely thin due to decreased physical strength. .

(Effects of the invention) Since the present invention is constructed as described above, the catheter will not come out even in the elderly, paralyzed persons, and other persons whose anal sphincter muscles do not contract sufficiently during the examination, and the contrast medium will not be removed. There is almost no leakage of the contrast agent, therefore, there is no chance of staining the examination equipment or clothing with the leaked contrast agent, and this also reduces the mental pain of the patient. Moreover, since the structure is simplified, it is easy to use and can be manufactured economically. Furthermore, if the shaft of the catheter is made transparent or semi-transparent, the contents inside the intestine can be directly seen at the time of collection, and the state inside the intestine can be known. Furthermore, by changing the material of the tip of the catheter, the amount of X-rays transmitted can be changed, and the position of the tip in the intestine can be determined from the difference in the amount of X-rays transmitted.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, with FIG. 1 being a partially omitted cross-sectional view, FIG. 2 being an enlarged cross-sectional view of the shaft portion, and FIG. 3 being an enlarged cross-sectional view of the tip portion of another example. 2...Shaft part, 3...Cuff part, 4...Tip, 1
0... Air channel, 12... Channel.

Claims (1)

[Claims for Utility Model Registration] 1. A balloon catheter inserted into the rectum of the body, which has a length of approximately 4 cm and can be inflated to a state in which approximately 70 c.c. of air is introduced during use. A balloon catheter characterized by having a cuff part. 2. The balloon catheter according to claim 1, wherein the shaft portion of the catheter is transparent or translucent. 3. The balloon catheter according to claim 1 or 2, wherein the tip of the catheter has contrast properties.