A new type of urinary catheter

Abstract

The utility model provides a novel catheter for solving the technical problem that urine deposition crystallization affects urine discharge caused by balloon extrusion catheter deformation, a novel catheter, the catheter is fixed with fixed balloon in the position close to the front end, the fixed balloon is composed of first fixed balloon and second fixed balloon which are not connected, is used for fixing the catheter in the bladder and urethra and sealing the urethra at the same time, the inner surface of the pipe body of the catheter has the microneedle assembly containing citric acid buffer solution, is used for reducing the settlement crystallization of urine.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a novel anti-blockage urinary catheter. Background Technology

[0002] Urinary catheters are commonly used clinical instruments for short- and long-term medical catheterization in patients with postoperative complications or urinary dysfunction. Catheter blockage is a frequent clinical problem. The blockage occurs because the catheter tip usually has a balloon. Inflating or filling the balloon with fluid or air helps to hold the catheter tip in place within the bladder, preventing it from easily dislodging. However, the balloon's inflation or filling process can compress the portion of the catheter where it is located, reducing the diameter of that section. Urine can easily crystallize and deposit in this smaller section, and the reduced diameter can prevent normal drainage. This type of blockage is difficult to treat and often requires catheter replacement. Utility Model Content

[0003] This invention provides a novel urinary catheter to solve the technical problem of urine deposition and crystallization caused by balloon compression of the urinary catheter, which affects urine discharge.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A novel urinary catheter is provided, wherein a fixation balloon is fixed near the distal end of the catheter. The fixation balloon is composed of a first fixation balloon and a second fixation balloon that are not connected, and is used to fix the urinary catheter to the bladder and urethra while sealing the urethra. The inner surface of the catheter body has a microneedle assembly containing a citric acid buffer solution to reduce urine sedimentation and crystallization.

[0005] Furthermore, the first fixing balloon is located inside the bladder and close to the urethral opening, and the second fixing balloon is located below the first fixing balloon and is used to fix it inside the urethra.

[0006] Furthermore, the distance between the first and second fixation balloons is 0.5-2 cm.

[0007] Furthermore, the microneedle assembly is an array of spaced microneedle rings, each ring consisting of several unconnected microneedles, with the bottom of each microneedle fixed to the inner surface of the tube.

[0008] Furthermore, the microneedle assembly is a microneedle spiral, which is formed by arranging several microneedles in a spiral shape, and the bottom of the microneedles is fixed to the inner surface of the tube.

[0009] Furthermore, the front end of the catheter is a flow guiding part, and a flow guiding side hole is formed on the side surface of the flow guiding part, and a flow guiding end hole is formed on the front end face of the flow guiding part.

[0010] Furthermore, the first fixation balloon and the second fixation balloon are connected by a first inflation tube. The first inflation tube is connected to the first fixation balloon through a first inflation port, and the first inflation tube is connected to the second fixation balloon through a second inflation port. A pressure membrane is fixed at the position of the second inflation port to control the inflation sequence of the fixation balloon.

[0011] Furthermore, the first and second fixation balloons are inflated by connecting separate inflation tubes.

[0012] Furthermore, a first adapter is fixed on the wall near the end of the catheter. The first adapter has a first insertion hole and a second insertion hole. The first insertion hole and the second insertion hole are respectively fixedly connected to two separate inflation tubes. A one-way valve is provided inside the first insertion hole and the second insertion hole near the tube wall to control the direction of gas flow.

[0013] Furthermore, a second adapter is provided in conjunction with the first adapter. The lower surface of the second adapter has a protruding post. The post is inserted into the first or second socket to seal the corresponding pipeline. The second adapter has a through hole that is connected to the air source through an external interface.

[0014] Compared with the prior art, the present invention has the following beneficial effects: (i) The fixation balloon consists of a first fixation balloon and a second fixation balloon. It can not only fix the urinary catheter but also seal it, preventing urine from seeping out along the periphery of the urinary catheter. The two balloons are spaced apart. This structure disperses the pressure during inflation, thereby reducing the compression on the tube and ensuring smooth urine drainage. (ii) A microneedle coil is installed inside the catheter, which enables the slow release of citrate buffer solution. The released citrate buffer solution comes into contact with the urine, thereby effectively inhibiting the formation of calcium oxalate, calcium phosphate and other crystals by chelating calcium ions and moderately alkalizing the urine. This ensures the smooth flow of urine in the catheter. The citrate buffer solution also gradually moves towards the openings on the fixation balloon and the drainage section, which can also reduce the sedimentation and crystallization of urine in these areas. In addition, the microneedle coil also provides other possibilities, such as carrying anti-inflammatory drugs, which can maximize the use time of the catheter for patients with long-term catheterization. (iii) The microneedle spiral inside the tube can not only reduce urine sedimentation and crystallization, but also accelerate urine flow during continuous urine drainage. It is beneficial for patients with temporary or short-term catheterization after surgery. Even large granular tissues can be smoothly discharged with the rapidly flowing urine. (iv) By setting up a pressure membrane, one inflation tube can be used to inflate two fixed balloons sequentially; (v) The converter head enables centralized management of the two inflation pipes, which can improve the efficiency of inflation operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the novel urinary catheter according to Embodiment 1 of this utility model; Figure 2 This is an enlarged view of the fixing balloon and the drainage part in the novel urinary catheter of Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the air-filled tubing in the novel urinary catheter according to Embodiment 1 of this utility model; Figure 4 This is a schematic diagram of the inflation interface in the novel urinary catheter according to Embodiment 1 of this utility model; Figure 5 This is a schematic diagram of the microneedle coil in the novel urinary catheter according to Embodiment 1 of this utility model; Figure 6 This is a schematic diagram of the microneedle thread arrangement in the novel urinary catheter of Embodiment 2 of this utility model; Figure 7 This is a schematic diagram of the conversion head in the novel urinary catheter of Embodiment 3 of this utility model.

[0016] Among them, 10-tube body, 100-connection port, 120-microneedle coil, 130-microneedle spiral, 20-fixation balloon, 210-first fixation balloon, 220-second fixation balloon, 231-first inflation port, 232-second inflation port, 233-inflation tube, 234-air source interface, 235-first adapter, 2351-first insertion hole, 2352-second insertion hole, 236-second adapter, 2361-insertion post, 2362-through hole, 2363-external interface, 30-guide section, 310-guide side hole, 320-guide end hole. Detailed Implementation

[0017] The following will be combined with the appendix Figure 1-5 A detailed and complete description of Example 1 will be provided, based on Example 1 and in conjunction with the appendix. Figure 6 One preferred improvement scheme is proposed, forming Embodiment Two; combined with Appendix Figure 7 Another preferred improvement is proposed, forming Example 3. Example 1

[0018] like Figure 1 As shown, the end of the tube body 10 of the novel urinary catheter is connected to a connection port 100 for connecting an external drainage tube, which in turn connects to a urine bag to complete the collection of urine. The other end of the tube body 10 is a drainage section 30, and a fixing balloon 20 is fixed on the outer surface of the tube body 10 near the drainage section 30. After inflation, the fixing balloon 20 expands to fix the urinary catheter.

[0019] A flow guiding side hole 310 is provided on the side surface of the flow guiding part 30, and a flow guiding end hole 320 is provided on the front end face of the flow guiding part 30. The flow guiding part 30 is basically a structure in the prior art and is not the focus of this embodiment, so it will not be described in detail.

[0020] like Figure 2 , Figure 3 and Figure 4 As shown, the fixation balloon 20 consists of a first fixation balloon 210 and a second fixation balloon 220 spaced apart by a distance typically between 0.5 and 2 cm. The first fixation balloon 210, when inflated, is located within the bladder adjacent to the urethra, while the second fixation balloon 220, when inflated, is fixed within the urethra adjacent to the bladder. The first fixation balloon 210 is connected to a first inflation port 231, which is connected to an inflation tube 233. The inflation tube 233 is located adjacent to the interior of the tube body 10 or shares a portion of its inner surface with the tube body 10. The lower end of the inflation tube 233 is connected to an air source interface 234, which in turn connects to an air source device to inflate the first fixation balloon 210. Similarly, the second fixation balloon 220 is connected to a second inflation port 232, which is also connected to the inflation tube 233, allowing inflation of the second fixation balloon 220 via the air source interface 234. However, the inflation of the first fixed balloon 210 and the second fixed balloon 220 must be sequential; the first fixed balloon 210 must be inflated first, followed by the second fixed balloon 220. Therefore, a pressure membrane is provided at the second inflation port 232. When the second fixed balloon needs to be inflated, the air intake is increased, and the increased pressure breaks through the pressure membrane to inflate the second fixed balloon 220. For those skilled in the art, the pressure membrane should be considered prior art and will not be elaborated here. The advantage of sharing a single inflation tube is that it saves space within the tube body 10. Of course, the size of the catheter is large enough, and the inflation volume required for the fixed balloon is not large. Therefore, it is also possible to use dual inflation tubes, with each fixed balloon connected to an individual inflation tube, so that the fixed balloons can be controlled separately. There are two inflation ports at the outlet position of the inflation device. In embodiment three, an external adapter is also provided to facilitate the management and quick operation of the inflation tubing.

[0021] The working principle of the fixation balloon 20: Push the front end of the tube 10 into the bladder. At this time, an external air source is connected through the air source interface 234 to inflate the balloon. The gas enters the first fixation balloon 210 through the inflation tube 233 and the first inflation port 231. After the first fixation balloon 210 is inflated, pull the tube 10 backward. At this time, the first fixation balloon 210 is stuck at the urethral opening of the bladder. At this time, increase the air intake. The gas breaks through the pressure membrane at the second inflation port 232 through the inflation tube 233 and enters the second fixation balloon 220 until the second fixation balloon 220 is stuck in the urethra and the inflation stops. The fixation balloon 20 is kept in an inflated state. At this time, the fixation balloon 20 fixes the catheter.

[0022] The fixation balloon 20 has two balloons, which distributes the pressure. In addition, because of the addition of fixation anchor points, it has changed from single fixation to double fixation. Therefore, the inflation volume of the fixation balloon 20 can also be appropriately reduced. In summary, the overall compression of the tube 10 is reduced, and the possibility of urine flowing out from the outer area of ​​the drainage tube is also avoided.

[0023] like Figure 5 As shown, the tube body 10 has microneedle coils 120 arranged at certain intervals inside. Each microneedle coil 120 is formed by several unconnected microneedles, with the bottom of the microneedles fixed to the inner surface of the tube body 10. Each microneedle in the microneedle coil 120 contains a citrate buffer solution. When urine passes through the tip of the microneedle, the citrate buffer solution is slowly released (the sustained release of drugs by microneedles is a mature technology, and since the slow release of citrate buffer solution should not be a technical obstacle, it will not be elaborated further). The released citrate buffer solution comes into contact with the urine, thereby effectively inhibiting the formation of calcium oxalate, calcium phosphate, and other crystals by chelating calcium ions and moderately alkalizing the urine. This ensures the smooth flow of urine in the tube body 10. Furthermore, the citrate buffer solution gradually moves towards the openings on the fixed balloon 20 and the guide section 30, which also reduces the sedimentation and crystallization of urine in these areas. The spacing between the microneedle coils 120 can be set according to the actual application scenario. For example, for patients requiring long-term catheterization, the catheter used does not contain large-scale tissue that needs to be drained. The requirement is that urine should not settle and crystallize on the inner surface of the catheter body 10 to extend the service life of the catheter. In this case, the spacing between the microneedle coils 120 can be smaller. By changing the size of the microneedles within the microneedle coils 120 and the release mechanism of the microneedle tips (such as adding a biodegradable membrane so that the citrate buffer solution can only be released after a certain period of time), citrate buffer solution can be available for a long period of time. Of course, this solution also brings some additional benefits. For example, the citrate buffer solution can be replaced with anti-inflammatory drugs in some of the microneedle coils 120, thus achieving an anti-inflammatory effect. In addition, for short-term catheterization or temporary catheterization after surgery, more attention is paid to the smooth drainage of a small amount of large-particle tissue. In this case, the optimized solution of Example 2 can be considered. Example 2

[0024] like Figure 6 As shown, based on Example 1, the microneedle coil 120 is replaced with a microneedle spiral 130. The microneedle spiral 130 is a structure formed by microneedles arranged in a spiral shape, with the bottom of the microneedles fixed to the inner surface of the tube 10. In addition to providing citric acid buffer solution, the microneedle spiral 130 can also accelerate urine flow during continuous urine drainage. It is beneficial for patients requiring temporary or short-term catheterization after surgery, as even large granular tissues can be smoothly drained with the rapidly flowing urine. Example 3

[0025] like Figure 7 As shown, this embodiment manages the inflation tubes that connect the first fixed balloon 210 and the second fixed balloon 220 respectively, so that they are connected to the air source from one place, thereby improving the inflation efficiency.

[0026] Two inflation tubes connecting the first fixed balloon 210 and the second fixed balloon 220 extend from the same side of the tube body 10 to the tube wall near the end of the tube body 10. A first adapter 235 is fixed to the tube wall at the corresponding position. The first adapter 235 has two insertion holes, namely a first insertion hole 2351 and a second insertion hole 2352, which are respectively connected to one of the two inflation tubes. Corresponding to the size of the first adapter 235 is a second adapter 236. A post 2361 is fixed on the lower surface of the second adapter 236. The post 2361 can be inserted into the first insertion hole 2351 or the second insertion hole 2352 to seal the corresponding insertion hole. The second adapter 236 also has a through hole 2362 that runs through the upper and lower surfaces. The through hole 2362 is connected to an external interface 2363, which is fixed to the upper surface of the second adapter 236 and is used to connect to an external air source.

[0027] One-way valves are connected to the first insertion hole 2351 and the second insertion hole 2352 near the tube wall to ensure that the gas in the inflation tube and the fixed balloon 20 does not leak out after inflation.

[0028] The working principle of the converter head: When a balloon needs to be inflated (the insertion ports can be labeled to confirm the correspondence), rotate the second converter head 236 to close the insertion ports of other balloons, leaving the insertion port corresponding to the target balloon open. At this time, connect the air source to the external interface 2363, and the gas enters the open insertion port through the vent 2362, and then enters the inflation tube connected to the insertion port, thereby inflating the balloon. It should be understood that a one-way valve should be connected to the lower end of the insertion port to ensure that gas remains in the inflation tube and balloon after inflation. When deflation is required, a suction device is needed.

Claims

1. A novel urinary catheter, characterized in that, The catheter is fixed with a fixation balloon near its tip. The fixation balloon consists of a first fixation balloon and a second fixation balloon that are not connected. It is used to fix the catheter to the bladder and urethra while sealing the urethra. The inner surface of the catheter body has a microneedle assembly containing a citric acid buffer solution to reduce urine sedimentation and crystallization.

2. The novel urinary catheter according to claim 1, characterized in that, The first fixation balloon is located inside the bladder and close to the urethral opening, and the second fixation balloon is located below the first fixation balloon and is used to fix it inside the urethra.

3. A novel urinary catheter according to claim 2, characterized in that, The distance between the first and second fixed balloons is 0.5-2 cm.

4. A novel urinary catheter according to claim 1, characterized in that, The microneedle assembly is an array of microneedle rings spaced apart. Each microneedle ring is composed of several unconnected microneedles, and the bottom of each microneedle is fixed to the inner surface of the tube.

5. A novel urinary catheter according to claim 1, characterized in that, The microneedle assembly is a microneedle spiral, which is formed by arranging several microneedles in a spiral shape, and the bottom of the microneedles is fixed to the inner surface of the tube.

6. A novel urinary catheter according to claim 1, characterized in that, The front end of the catheter is a flow guiding part, and a flow guiding side hole is opened on the side surface of the flow guiding part, and a flow guiding end hole is opened on the front end face of the flow guiding part.

7. A novel urinary catheter according to claim 1, characterized in that, The first and second fixed balloons are connected by a first inflation tube. The first inflation tube is connected to the first fixed balloon through a first inflation port, and the first inflation tube is connected to the second fixed balloon through a second inflation port. A pressure membrane is fixed at the position of the second inflation port to control the inflation sequence of the fixed balloons.

8. A novel urinary catheter according to claim 1, characterized in that, The first and second fixation balloons are inflated by connecting separate inflation tubes.

9. A novel urinary catheter according to claim 8, characterized in that, A first adapter is fixed on the wall of the catheter near the end of the catheter. The first adapter has a first insertion hole and a second insertion hole. The first insertion hole and the second insertion hole are respectively fixedly connected to two separate inflation tubes. A one-way valve is provided inside the first insertion hole and the second insertion hole near the tube wall to control the direction of gas flow.

10. A novel urinary catheter according to claim 9, characterized in that, A second adapter is provided in conjunction with the first adapter. The lower surface of the second adapter has a protruding post. The post is inserted into the first or second socket to seal the corresponding pipeline. The second adapter has a through hole that is connected to the air source through an external interface.

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