NO772529L - UROLOGICAL CATHETER. - Google Patents

Description

Urological catheter.

Catheterization of the urinary bladder is a by preventing urine outflow from the urinary bladder or to enable an intermittent resp. continuous flushing of the urinary bladder gene-, fairly common therapeutic technique. In this way, catheters of various constructions such as e.g. according to Tiemann, Staehler, Foley, Hryntschak, Frohmtlller, Delinotte, Couvelaire, Mikulicz, Pezzer and of various materials such as e.g. latex, soft rubber, regenerated rubber, silicone elastomers, silicone-latex combinations and other polymeric materials such as e.g. polyvinyl chloride or polyurethanes in the urinary bladder cavity to either ensure undisturbed outflow of urine or to enable a regular or continuous flushing of the urinary bladder with solutions recognized as suitable.

The transurethral method is usually preferred (7 i.e. when there is no insurmountable obstacle for the catheter in the urethra. - .

In principle, longer stays of a catheter are fraught with two risks

1. an ascending infection

2. irritation of the adjacent urinary tract mucosa

the catheter.

in principle possible on

two ways. Firstly through the catheter lumen, secondly over the space between the outer surface of the catheter and the urethral mucosa.

The aforementioned irritation of the urethral mucosa is felt by the patient as very unpleasant and, because of its painfulness, may be forced to a therapeutically unwanted removal of the catheter. Depending on the severity of the inflammation, urinary tract strictures (narrowing of the cross-section) may later appear in some cases.

The reason for these inflammations, as also for the infections that do not rise above the catheter lumen, is to be seen in the fact that between the outer catheter wall and the urethral mucosa, a dbdrome is forcibly formed in which the dbde Spells and secretions from the ureteral mucosa remain, which after breakdown or decomposition forms an ideal nutrient base for bacteria, which in turn acts to further break down the material present and leads to an infection.

The above-mentioned type of obstruction is only possible by regular flushing of the bladder space between catheters and urethral mucosa, preferably using anti-inflammatory and/or antibacterially effective flushing agents.

A balloon catheter has already been mentioned

which must fulfill this function. Via an additional line, a compressible flushing chamber equipped circularly around the catheter's circumference could quickly and with many small openings be filled with a flushing fluid that could seep out through them. mentioned, openings. The filling of the additional line and the flushing chamber took place by means of a needle-armed injection syringe which was closed by means of a membrane placed at the end of the liquid line.

This device has the following obvious disadvantages:

1. Its manufacture, especially the placement of the flushing chamber is difficult and technically cumbersome. 2. The numerous small openings in the flushing chamber could easily be stuck together by mucosal secretions or blocked. 3. Due to the small diameters of these openings, the necessary flushing pressure is often not or only difficult to achieve. Viscous solutions or suspensions are difficult to apply. 4. A drainage of the secretion masses built up between the flushing chamber and the urethra is not ensured. 5. The membrane termination of the supply line can only be reused a few times and does not form a secure termination after the first perforation.

The disadvantages of the above-mentioned device were now overcome by the urological catheter according to the invention with a flushing device, as this urological catheter is characterized by the fact that one fluid line 2 extending into the catheter wall 1 ends in the form of a free outlet opening 3. The outlet opening 3 "should appropriately at least correspond to the diameter of the line, preferably be designed funnel-shaped.

The large outlet opening thus formed leads to the following significant advantages: a) an orientation that disturbs the function of this in case of secretions is not possible, as it is automatically removed by the higher liquid pressure that can be produced in the flushing channel,

b) those per the amount of flushing liquid available per unit of time is greater so that masses of solid consistency are also

easily flushable,

c) makes it possible in an acceptable way to flush out secretions from the urethral appendage glands placed near the urethra, which free micturition is constantly flushed out by passing urine, d) also viscous solutions resp. suspensions can be applied without strong pressure bends.

The fluid line 2 usually runs parallel to the catheter axis. However, it can also be lined in another way, e.g. spiral in the catheter wall. That diameter is limited by the thickness of the catheter wall and the prescribed amount of irrigation fluid.

The fluid line 2 usually ends with only one free outlet opening. For special cases, however, it may also be advantageous to equip it with one or more additional side outlet openings.

The liquid line 2 is suitably closed by means of

a valve 4, in particular a non-return or lip valve which ensures a permanent safe closure. The recording of the valve 4 and, in the case of a balloon catheter, a possibly similar valve 5

for closing the line 7 serving for filling the balloon 6 usually takes place over each time a tube attached laterally. The valve 4 is appropriately equipped with a connection tube for connection with the device containing the flushing liquid, such as an injection probe or the line of a liquid container. The valve 5 also usually has such a tube for filling

the liquid required to fill the balloon. This fulfillment can e.g. likewise take place with the help of an injection syringe or from a directly connected elastic liquid, container.

However, closing the lines 2 and 3 can also take place in another way, e.g. by means of a small cock. Also the use of a diaphragm is possible instead of valve 4. De. other parts of the catheter such as a frequently used in urological catheters, placed at the front end, for fixing the catheter serving balloon 6, the catheter openings 8, outlet opening 9 correspond to the usual designs known for catheters.

The catheter can, for example, consist of the same materials as already mentioned above for the devices belonging to the state of the art.

The parts according to the invention of the catheter can be produced in a simple way according to the commonly used dipping process, which is known for example for the production of latex products by inserting a wire made of a suitable material into the catheter wall. In practice, smooth threads of polyamide or polyester have proven to be suitable for the thread material. However, they can be replaced by threads or monofilaments of different natural

or plastics. When the thread is pulled out, the liquid line with the mentioned exit opening is then formed. This method is also applicable for the production of several liquid joint rigs with several exit openings. At the same time, there is thus also the possibility of routing the liquid line spirally around the catheter and of placing several exit openings.

The funnel-shaped design of the exit opening 3 is usually placed during subsequent processing, as expediently a flow-friendly shape of the funnel is ensured.

The manufacture of catheters of the mentioned embodiment, preferably of elastomers, can also take place by the manufacture of a hose of the required diameter, e.g. according to the blow-extrusion method, where the liquid line or lines are incorporated into the wall by blowing in air or liquid with the help of extra nozzles. They are equipped at the front (proximal)

end with one or several openings and at the rear (distal) end with a branching tube for recording closed.

The catheter tube produced in this way is further processed in the usual way into finished products such as e.g. placement of a balloon 6 or the openings 8.

The intravesical part of the catheter can be equipped with one of the tips common in urology, for example with such as the initially mentioned catheters according to Tiemann, Staehler, Foley etc. have.

For use, the catheter is inserted into the urethra and when using a balloon catheter is pulled towards the bladder neck after filling the balloon 10. After making a connection with the fluid line, which e.g. a plunger probe or the line of an irrigation fluid container that is attached to the valve's connection tube opens the valve whereby the antiseptic fluid according to the invention emerges from the opening in the outer wall of the catheter, flushes the area between the catheter and the urethra and can flow away through the meatus. After flushing, for example, an antibiotic ointment can be applied. During the flushing, the potential culture medium for bacteria in the area in question can thus be very easily removed in both female and male patients, and further protection against the entry of bacteria is thus provided. Of course, it is also possible to additionally treat in this way an already existing, especially with prolonged use of a catheter, a particularly unfortunate infection. The flushing enables the free flow of secretions from the excretory glands.

Claims (5)

1. Urological catheter with flushing device, characterized in that a fluid line (2) extending into the catheter wall (l) ends in the form of a free outlet opening (3). 2. Catheter according to claim 1, characterized in that the opening (3) at least corresponds to the diameter of the line (2) and is possibly extended funnel-shaped. 3. Catheter according to claims 1 and 2, characterized in that the fluid line (2) has several exit openings. 4. Catheter according to claims 1-3, characterized in that several fluid lines (2) are incorporated into the catheter wall (l). 5. Catheters according to requirements 1-4, grade! see t in that it is made from latex, soft rubber, regenerated rubber, silicone elastomers, silicone-latex combinations, polyvinyl chloride or polyurethane.