JPH0449975A - Catheter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to improvements in medical catheters, particularly ureteral catheters inserted into the bladder via the urethra.

<Prior Art> Rubber or plastic ureteral catheters are used to drain urine from patients with symptoms such as difficulty in urination and urinary incontinence, or patients after surgery.

When this ureteral catheter is inserted into the urethra or during use, it comes into contact with the anus, genitals, etc., and often introduces bacteria attached thereto into the bladder, causing cystitis. In particular, women are more likely to be infected with this bacteria because their urethra is thicker, shorter, and straighter than men's.

In order to prevent these bacteria from entering the bladder, conventional methods have included covering the tubular body of the catheter with a sterile metal ring or coil (see Japanese Patent Publication No. 14876/1987), or using lubricants containing antibiotics or bactericidal agents. A type of agent (ointment or grease) was applied.

However, in the above-mentioned method of attaching a metal ring or coil, the metal ring etc. are thick, so the thickness of the tubular body portion of the catheter is increased, which increases the pain during insertion into the patient. In addition, it is extremely difficult to fix a metal ring or the like in a predetermined position on the tubular body portion of the catheter. In addition, in the latter method of applying drugs, the surface of the tubular body of the catheter is smoothed to reduce the insertion force during insertion, and the drug easily falls off the surface of the tubular body. However, there was a drawback that the infection prevention effect was not as high as expected. Furthermore, as the catheter is inserted deeper into the body, the applied drug falls off from the tip, causing the catheter to lose its lubricity and gradually causing pain to the patient.

<Problems to be Solved by the Invention> The present invention solves the problems of conventional catheters as described above, and provides a catheter that does not cause pain to the patient and maintains its infection prevention effect for a long period of time. With the goal.

Means for Solving the Problems> In order to achieve the above object, the present invention provides (1) an inlet opening at one end of a relatively flexible tubular body made of rubber or plastic, and an outlet opening at the other end. (2) In the catheter, a metal layer having a crack is provided in a part of the tubular body of the catheter, and (2) in the catheter, a drug such as a sterilizing agent or a bactericidal agent is infiltrated into the crack formed in the metal layer. (3) In the catheter described in (1) above, a lubricant is infiltrated into the cracks formed in the metal layer; (4) In the catheter described in (1) above, , characterized in that a chemical and a lubricant are infiltrated into the cracks formed in the metal layer.

<Function> By providing a metal layer on a part of the catheter tubular body by a chemical or physical method such as plating or vapor deposition, it can be coated very thinly, so that the thickness of the catheter tubular body becomes thick. Since the metal layer is not cracked and its flexibility is not impaired, the catheter does not cause any more pain to the patient than conventional catheters.

Furthermore, the present invention makes it possible to infiltrate and retain ointments or greases containing antibiotics or bactericidal agents into cracks in the metal layer applied to the catheter tubular body, and in some cases, lubricants may also be used. Because it can be penetrated, the drug will not fall out due to friction or deformation when inserted into the urethra.
Even when inserted into the urethra, the drug is retained in the cracks in the metal layer, preventing bacterial infection.

Furthermore, even when the catheter is inserted deep into the urethra, lubricating agents and the like continue to be retained at the tip of the catheter, making it possible to insert the catheter without causing pain to the patient.

<Embodiment> FIG. 1 shows an embodiment in which the present invention is applied to a balloon catheter. Reference numeral 1 denotes a catheter body, which is relatively flexible and made of rubber or plastic such as silicone or latex. 2 is a tubular body which is the main part of the catheter, 3 is an inlet provided at the tip of the tubular body 2 of the catheter 1, 4 is an outlet provided at the rear end of the tubular body 2 of the catheter 1, and 5 is an outlet of the tubular body 2. The metal layer 5 is a metal layer applied to the tip portion, and the metal layer 5 is a metal having a bactericidal or sterilizing effect, such as copper, nickel, silver, or gold, and is applied to the surface of the tubular body by a method such as plating or vapor deposition.

Copper plating on the surface of the tubular body was first performed using 40 g/42 N.
After cleaning with aOH, Pd nuclei are formed on the surface to be plated with a PdCl□-based activating solution, and a 0.2 μm copper plating layer is formed by treating with Cu-406 plating solution (manufactured by Meltex Corporation) for 20 minutes. can be formed.

Numeral 6 represents a crack provided in the metal layer, which can be easily formed by bending or ironing after applying the metal layer with a spacing. Note that the number of cracks can be arbitrarily selected depending on the number of bending operations or the strength of ironing.

7 is a drug infiltrated into the crack, which can be arbitrarily selected depending on the application and symptoms, such as an ointment or grease containing an antibiotic, or a lubricant containing a bactericide.

Note that 8 in the figure is a balloon provided at the tip of the tubular body, and can be inflated by pressurizing air through an air insertion port 9 provided at the rear of the catheter body.

Effect> As described above, the catheter of the present invention has a thin metal layer on its tubular body portion, and the metal layer has cracks so that the flexibility of the tubular body itself is not impaired (in particular, ,
There is no risk of increasing pain to the patient during insertion.

Furthermore, by infiltrating a bactericidal agent, antibacterial agent, or sterilizing agent into the cracks provided in the metal layer, bacterial infection can be particularly prevented during use, and by infiltrating a lubricant into the cracks, it can be applied to It has excellent effects such as being able to relieve pain during insertion.

Note that if the metal layer is made of a metal that has a bactericidal or sterilizing effect, the introduction of bacteria can be prevented by the metal's own bactericidal or sterilizing effect.

Although the present invention has been described above based on a urinary catheter, it goes without saying that the present invention can also be applied to catheters inserted into blood vessels.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing one embodiment of the present invention. 2 is a tubular body 3, an inlet 4 is an outlet 5, a metal layer 6 is a cracked portion

Claims (4)

[Claims] (1) In a catheter having an inlet at one end and an outlet at the other end of a relatively flexible tubular body made of rubber or plastic, a metal layer having a crack is provided in a part of the tubular body. A catheter characterized by: (2) The catheter according to claim 1, wherein a chemical such as a sterilizing agent or a bactericidal agent is infiltrated into the cracks formed in the metal layer. (3) The catheter according to claim 1, wherein a lubricant is infiltrated into the cracks formed in the metal layer. (4) The catheter according to claim 1, wherein a drug and a lubricant are infiltrated into the cracks formed in the metal layer.