JPS588252B2 - Balloon catheter for intraurethral placement - Google Patents

Description

Detailed Description of the Invention (1) Background of the Invention [Technical Field] The present invention relates to a balloon catheter for indwelling in the urethra that can prevent urinary tract infections that occur when the catheter is indwelled in the urethra.

It has been observed that when a balloon catheter for intraurethral indwelling is left in the urethra for a long period of time, urethritis, cystitis, and pyelonephritis due to ascending bacterial infection often occur.

The routes of this ascending infection are (1) extraluminal (bacteria entering from outside the catheter) and (2) intraluminal (bacteria entering from the catheter channel), and the latter is a closed type. It is generally accepted that this can be effectively prevented by adopting a urinary drainage circuit; however, various methods have been proposed to date to prevent the latter from extravascular infection, but none of them can be said to be satisfactory. .

[Prior art]

Conventional methods for preventing this extravascular infection include (1) coating the catheter surface with metals or alloys such as gold, silver, copper, etc. in order to take advantage of their bactericidal effects; (1j) urinary bladder infection; Proposed methods include washing and prophylactic administration of antibiotics, using water-repellent materials such as GiD silicone and Teflon, and suppressing stimulation of urethral cells to prevent a decline in the defense ability of the urethral mucosa.

[Problems with conventional technology]

However, method (i) above has problems in preventing infection and is undesirable in terms of high cost. It cannot be expected to be effective, and its effectiveness in preventing infection cannot be said to be sufficient.

Furthermore, the method (■) cannot be expected to have sufficient infection prevention effects.

■ Purpose of the Invention This invention has been made in view of the above circumstances, and provides a method for intraurethral indwelling that can prevent extraluminal urinary tract infections with a simple method and is less likely to cause pain to the patient. The purpose of the present invention is to provide a balloon catheter.

That is, the present invention provides a catheter tube having a liquid flow path and an opening communicating with the flow path at the distal end and an open proximal end, and a catheter tube provided on the outer periphery of the catheter tube behind the opening so as to be expandable and contractible. In a balloon catheter for intraurethral indwelling, the balloon catheter is provided with a balloon indwelling in the urethra, and a balloon inflation passage provided along an upper catheter tube, the distal end of which communicates with the inside of the balloon, and the proximal end of which is provided with a check valve. , a check valve is provided at the proximal end, and a urethral cleaning passage that opens on the outer periphery of the catheter tube behind the balloon 1 to 2 crn is provided along the catheter tube, and the opening of the cleaning passage is connected to the catheter tube. Another object of the present invention is to provide a balloon catheter for indwelling in the urethra, which is characterized in that it has an elliptical shape that gradually expands in the circumferential direction.

The present invention further provides a balloon catheter for indwelling in the urethra, characterized in that one or more openings of the urethral cleaning passage are provided at a distance of 1 to 2 cm from the balloon position.

■ Specific explanation of the invention The present invention will be explained below based on illustrated embodiments.

FIG. 1 shows an overall view of the balloon catheter for intraurethral indwelling according to the present invention, in which the tip is occluded as shown in FIG. a catheter tube 5 having an opening 3 near its tip that communicates with the flow path 1; a balloon 7 provided in an expandable and deflated manner on the outer periphery of the catheter tube 5 behind the opening 3 and used to indwell the catheter; A balloon inflation air passage 9 is integrally provided along the catheter tube 5 and has a distal end communicating with the inside of the balloon 7, and a cleaning port 11 (for example, not shown in the figure) opens on the outer periphery of the catheter tube 5 slightly behind the balloon 7. 1 to 2 cm behind, and about 1 more behind that.
One opening was made at the cm position. A urethral washing passageway 13 having a urethral washing passageway 13 is integrally provided along the catheter tube 5.

Further, at the rear end of this balloon catheter for intraurethral indwelling, there is a urinary port 15 communicating with the liquid flow passage 1, and a branch tube 17 for the balloon communicating with the balloon inflation passage 9, so that liquid injected into the proximal end can flow back. A check valve 19 is provided to prevent leakage, and a branch pipe 21 communicates with the urethral washing passage 13.
A check valve 23 is provided to prevent the cleaning liquid injected into the proximal end from flowing backward and leaking.

There are no particular restrictions on the number, diameter, etc. of the urethral cleaning passage 13, but one is usually provided on the opposite side of the balloon inflation passage 9 provided in the catheter tube 15, and its diameter is approximately 1 to 1.5 mm. is sufficient.

There is no particular limit to the number of cleaning ports 11, but usually about two will suffice.

Balloon catheter 5 has a unique shape with a cleaning effect.
It is preferable to expand gradually in the circumferential direction.

As for the material of this balloon catheter for indwelling in the urethra, for example, the catheter tube 5 may be made of silicone rubber, rubber latex, soft polyvinyl chloride, or a material coated with silicone.

The balloon 1 is made of silicone rubber, rubber latex, or the like, and is provided on the outer periphery of the catheter tube 5 at a predetermined position.

Furthermore, a ventilation passage 9 for balloon inflation and a passage 1 for urethral washing.
Regarding the formation method 3, for example, rubber latex is coated on the surface of a rod-shaped mold for forming the liquid flow path 1, and a thin rod-shaped mold is used to form the balloon inflation path that communicates with the balloon part. After applying the latex coagulant to the rod-shaped mold, the latex coagulant is attached along the rod-shaped mold, and its tip is moved slightly back from the tip of the rod-shaped mold.

Thereafter, a latex coagulant is applied to a thin rod-shaped mold for forming a urethra cleaning passage, and the latex coagulant is attached along the rod-shaped mold, with its tip slightly behind the balloon portion.

Next, the rod-shaped mold and thin rod-shaped mold were rotated. A volatile solution of silicone and a lower alcohol koji solution of a divalent or trivalent metal salt are sequentially or simultaneously applied to the tip of the thin rod-shaped mold and its surrounding surface while maintaining the temperature.

The whole is then covered with rubber latex again and dried to produce the product.

Various methods can be considered to open the cleaning port 11, but for example, the catheter tube 5 is crushed so that the urethral cleaning passage 13 goes around the side, and in that state, it is punched from the vertical direction to communicate with the urethral cleaning passage. Form an opening.

When the opening is formed in this manner, the shape of the cleaning port 11 becomes an ellipse that gradually expands in the circumferential direction of the catheter tube 5, which is preferable in terms of the cleaning effect as described above.

(2) Specific Effects of the Invention Next, a method of using the balloon catheter for indwelling in the urethra according to the present invention will be explained.

First, the tip of the catheter is inserted into the bladder, the balloon T is inflated, and the catheter is placed in the urethra in the same manner as in the conventional method.

While the patient is left in place, the cleaning fluid is injected from the check valve 23 using a syringe when necessary.

The injected cleaning fluid passes through the urethral cleaning passageway 13 and reaches the cleaning port 11, from where it spreads throughout the urethra, flows toward the external urethral opening while cleaning the urethral wall surface, and is discharged from the body.

In this case, the boundary tissue between the bladder and urethra is approximately 1 cIf in width.
Since it is muscular throughout L, washing fluid does not flow into the bladder.

After cleaning, a disinfectant may be mixed if necessary, and
It is also possible to inject ointment or the like instead of a cleaning solution.

As described in detail above, according to the present invention, the balloon catheter for intraurethral indwelling can be operated at any time while the balloon catheter remains indwelled in the urethra.
Since the urethra can be cleaned or disinfected, it is possible to easily and completely prevent secondary infection and ascending infection caused by bacteria that occur during the indwelling of a balloon catheter in the urethra without causing pain to the patient. This is extremely useful for aseptic management of seed catheters.

Also, move the opening of the urethral irrigation passage 1 to 2 points from the balloon position.
The urethra can be washed more effectively by providing one or more urethral washing passages spaced apart by cm or by making the opening of the urethral washing passage into an elliptical shape that gradually expands in the circumferential direction of the catheter tube.

Furthermore, the present invention can be manufactured at low cost.

Furthermore, since the surface of the catheter is not coated with antibiotics, it has excellent effects such as being able to be used even by people with idiosyncratic constitutions.

[Brief explanation of drawings]

FIG. 1 is a plan view showing how the balloon portion of a balloon catheter for intraurethral indwelling according to an embodiment of the present invention is inflated, and FIG. 2 is a cross-sectional view showing a main part of the catheter shown in FIG. It is. In the figure, 1...Liquid flow path, 3...Opening, 5...Catheter tube, 1...
・Balloon, 9... Air passage for balloon inflation, 1
1...washing port, 13...urine/urine washing passage, 1
5... Urinary opening, 17.21... Branch pipe, 19
, 23... Check valve.

Claims (1)

[Scope of Claims] 1. A catheter tube having a liquid flow path and an opening communicating with the flow path at its distal end and having an open proximal end;
a balloon provided on the outer periphery of the catheter tube behind the opening so as to be inflatable and deflated; and a balloon provided along the catheter tube with a distal end communicating with the inside of the balloon and a check valve provided at the proximal end. In the balloon catheter for intraurethral indwelling, which is equipped with an air passage for inflation, a check valve is provided at the proximal end, and the balloon height is 1 to 2 crrL.
A urethral cleaning passage that opens to the outer periphery of the catheter tube at the rear is provided along the catheter tube, and the opening of the cleaning passage has an elliptical shape that gradually expands in the circumferential direction of the catheter tube. A balloon catheter for indwelling in the urethra. 2. The balloon catheter according to claim 1, wherein the catheter tube has a surface coated with silicone.