Intelligent portable urinary catheterization valve

By integrating a pressure sensor and a buzzer into the urinary catheter valve, the intelligent portable urinary catheter valve solves the problem of patients needing to actively operate the urination, realizes automatic prompting and urine storage, enhances safety and reliability, and reduces the risk of bladder overdistension.

CN121466478APending Publication Date: 2026-02-06SHANGHAI NINTH PEOPLES HOSPITAL SHANGHAI JIAO TONG UNIV SCHOOL OF MEDICINE
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Patent Information

Application Number
CN202511952335.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-23
Publication Date
2026-02-06

AI Technical Summary

Technical Problem

Existing urinary catheter valves require patients to actively urinate, which can lead to urine accumulation in the bladder, potentially causing complications such as bladder wall damage and urinary tract infections, and are not safe or reliable enough.

Method used

A smart portable urinary catheter valve was designed, equipped with a pressure sensor and a buzzer. When the amount of urine in the bladder reaches a certain level, the sensor triggers the buzzer to prompt the patient to urinate, and the urine is introduced into the reservoir through a bypass tube to reduce bladder pressure.

Benefits of technology

It improves the intelligence and safety of the catheter valve, reduces the risk of bladder overdistension, and lowers the health risks and suffering of patients.

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Abstract

The invention discloses an intelligent portable urethral catheter valve, and relates to the technical field of medical appliances and equipment.The intelligent portable urethral catheter valve comprises an intelligent portable urethral catheter valve mounting cylinder, a valve element used for controlling urine to be conducted and closed is arranged in the mounting cylinder, the valve element comprises a main body and a valve pipe, and a connecting pipe and an output pipe are fixedly mounted at the upper end and the lower end of the mounting cylinder respectively; the connecting pipe and the output pipe are both communicated with the interior of the mounting cylinder, the connecting pipe is provided with a plurality of protruding edges used for being connected with the end of the catheter, a mounting groove is formed in the body, an elastic stress film is arranged at a groove opening of the mounting groove, a pressure sensor is arranged in the mounting groove, and the detection end of the pressure sensor is fixedly connected with the elastic stress film. A storage battery, a controller and a buzzer which are electrically connected with the pressure sensor are arranged in the mounting cylinder, and by means of the structure, a patient can be reminded to urinate in time when urine is accumulated to a certain amount, so that the bladder is prevented from being overfilled.
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Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to an intelligent portable catheter valve. Background Technology

[0002] Indwelling catheters are routinely used in many surgical procedures and by patients who may be unable to control urination due to urinary incontinence or mobility impairments, such as paraplegics or quadriplegia. Catheterization may be the only method of urinary management. Indwelling catheters are used in hospitals and at home. In hospitals, patients may be in a post-operative or post-traumatic state for reasons unrelated to the bladder and may be bedridden or even unconscious. They may also have various bladder conditions. In these patients, use is relatively short-term, lasting from a few days to a few weeks. A catheter is a tube inserted into the bladder through the urethra to drain urine. It is made of natural rubber, silicone rubber, or polyvinyl chloride. After insertion into the bladder, a balloon near the tip of the catheter secures it in place, preventing dislodgement.

[0003] Chinese invention CN214762788U discloses a urinary catheter valve, including a tube body for guiding urine flow. The tube body has an installation groove, with both ends of the groove connected to the tube body along its diameter. The installation groove is cylindrical, and a valve core for controlling the flow of urine is located within it. The valve core includes a main body for rotating within the installation groove and a valve tube located along the diameter of the main body. This invention allows for control of the flow of urine in the catheter, facilitating control of urine discharge when needed, reducing the production cost of the catheter device, and improving the convenience of using the catheter. However, this type of urinary catheter valve still has significant drawbacks: because the urination process relies on the patient's active operation, if the patient is confused, immobile, cognitively impaired, or neglects to open the valve at the designated time after surgery, urine will continue to accumulate in the bladder, leading to bladder overdistension. This can not only cause complications such as bladder wall damage, urinary tract infection, and urine reflux, but also exacerbate patient suffering and bring secondary health risks, thereby weakening the safety and reliability of the use of the catheter valve.

[0004] In conclusion, how to improve the intelligence of urinary catheter valves is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide an intelligent portable urinary catheter valve that can remind the patient to urinate in time when urine accumulates to a certain amount, so as to prevent the bladder from becoming overfilled.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A smart portable urinary catheter valve, comprising:

[0008] The mounting cylinder has a connecting pipe and an output pipe fixedly installed at its upper and lower ends, respectively.

[0009] The valve core includes a main body for being embedded in the rotating mounting cylinder and a valve tube disposed on the main body along the diameter direction of the main body. A pressure sensor is provided on the connecting tube, and a battery, a controller and a buzzer electrically connected to the pressure sensor are disposed inside the mounting cylinder.

[0010] Furthermore, the present invention includes an installation groove inside the connecting pipe, an elastic force-bearing membrane at the opening of the installation groove, and the pressure sensor disposed inside the installation groove.

[0011] Furthermore, in this invention, a bypass pipe is connected and installed on the connecting pipe near the mounting cylinder, and a sealing mechanism for switching the communication relationship between the bypass pipe and the connecting pipe is provided inside the connecting pipe. The other end of the bypass pipe is movably connected to a liquid storage box, and the liquid storage box is installed on the valve core.

[0012] Furthermore, the sealing mechanism of the present invention includes:

[0013] The device comprises a plug, a fitting piece and a movable rod fixedly installed at the end of the plug, and an elastic corrugated tube sleeved on the movable rod. The plug is movably installed inside the opening of the side outlet pipe. The end of the movable rod away from the plug passes through the connecting pipe. The elastic corrugated tube is fixedly installed between the plug and the wall of the connecting pipe.

[0014] Furthermore, the plug is cylindrical, and a plurality of liquid outlet grooves extending parallel to the axis of the plug are provided on the plug.

[0015] Furthermore, in this invention, an installation block is fixedly installed between the installation cylinder and the connecting pipe, and an installation cavity is provided inside the installation block. One end of the movable rod that passes through the connecting pipe extends into the installation cavity, and a wedge is fixedly installed at the end of the movable rod that extends into the installation cavity. A miniature push rod is fixedly installed inside the installation cavity, and a top block adapted to the wedge is fixedly installed at the telescopic end of the miniature push rod.

[0016] Furthermore, the side outlet pipe is fixedly installed with a connecting end at the end away from the connecting pipe. The connecting end is provided with an external thread. The liquid storage box is provided with a threaded connecting seat that is compatible with the connecting end. The upper end of the threaded connecting seat is provided with an annular sealing ring.

[0017] Furthermore, in this invention, a threaded rod is rotatably mounted on the bottom of the liquid storage box, and a drive module is fixedly mounted on the upper end of the liquid storage box. The drive module includes a battery and a motor. The output shaft of the motor passes through the liquid storage box and is fixedly connected to the upper end of the threaded rod. A movable push plate is threadedly connected to the threaded rod. The movable push plate is movably mounted inside the liquid storage box, and an elastic rubber ring is provided on the side of the movable push plate that contacts the inner wall of the liquid storage box. An elastic folding cylinder is sleeved on the threaded rod between the movable push plate and the inner wall of the liquid storage box.

[0018] Furthermore, the present invention provides that a mounting plate is fixedly mounted on the front of the main body, the mounting plate extends along the cross-sectional direction of the main body, and a button plate for controlling the rotation of the valve core is provided at one end of the mounting plate away from the main body, and a plurality of evenly arranged anti-slip textures are provided on both sides of the button plate.

[0019] Furthermore, the mounting plate is provided with an arc-shaped limiting groove, and a fixing column is fixedly installed on the mounting cylinder, the fixing column being movably installed within the arc-shaped limiting groove.

[0020] The intelligent portable urinary catheter valve provided by this invention is connected to the end of the urinary catheter via a connecting tube, allowing the urinary catheter valve to replace the traditional urine collection bag, facilitating the movement of patients with urinary catheters. When the urine in the patient's bladder increases to a certain limit, a pressure sensor, in conjunction with a controller and a buzzer, prompts the patient to urinate in time, enhancing the safety and reliability of the urinary catheter valve during use. The pressure sensor, controller, and buzzer prompt the patient to urinate in time, reducing the risk of secondary injury to the patient. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the intelligent portable urinary catheter valve of the present invention;

[0023] Figure 2 This is a schematic diagram of the valve core and mounting cylinder in the separated state of the intelligent portable urinary catheter valve of the present invention;

[0024] Figure 3 This is a cross-sectional view of the mounting cylinder portion of the intelligent portable urinary catheter valve of the present invention.

[0025] Figure 4 for Figure 3Enlarged structural diagram at point A;

[0026] Figure 5 for Figure 3 Enlarged structural diagram at point B;

[0027] Figure 6 This is a schematic diagram of the plug portion in the intelligent portable urinary catheter valve of the present invention;

[0028] Figure 7 This is a schematic diagram of the internal structure of the fluid storage box in the intelligent portable urinary catheter valve of the present invention;

[0029] Figure 8 This is a cross-sectional view of the reservoir portion of the intelligent portable urinary catheter valve of the present invention.

[0030] Figures 1-8 In the accompanying drawings, the reference numerals include:

[0031] 1. Mounting cylinder; 11. Fixing column;

[0032] 2. Valve core;

[0033] 21. Main body; 211. Mounting groove; 212. Elastic force-bearing membrane; 213. Pressure sensor;

[0034] 22. Valve pipe;

[0035] 23. Mounting plate; 231. Arc-shaped limiting groove;

[0036] 24. Press the board;

[0037] 3. Connecting pipe; 31. Fixing cylinder;

[0038] 4. Side outlet pipe; 41. Plug; 42. Adhesive plate;

[0039] 43. Movable rod; 431. Wedge block;

[0040] 44. Flexible bellows; 45. Connecting end;

[0041] 5. Liquid reservoir; 51. Threaded connector; 52. Threaded rod; 53. Drive module; 54. Movable push plate; 55. Flexible folding cylinder;

[0042] 6. Mounting block; 61. Miniature push rod; 62. Top block;

[0043] 7. Output tube. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] The core of this invention is to provide an intelligent portable urinary catheter valve that can remind the patient to urinate in time when urine accumulates to a certain amount, so as to prevent the bladder from becoming overfilled.

[0046] Please refer to Figure 1 The present invention discloses an intelligent portable urinary catheter valve, comprising an installation cylinder 1 and a valve core 2. The installation cylinder 1 contains a valve core 2 for controlling the flow and closure of urine. The valve core 2 includes a main body 21 for being embedded in and rotated within the installation cylinder 1, and a valve tube 22 disposed on the main body 21 along its diameter. A connecting tube 3 and an output tube 7 are fixedly installed at the upper and lower ends of the installation cylinder 1, respectively. Both the connecting tube 3 and the output tube 7 are connected to the interior of the installation cylinder 1. The connecting tube 3 has multiple protrusions for connecting to the end of the urinary catheter. An installation groove 211 is provided on the main body 21. An elastic force-bearing membrane 212 is provided at the opening of the installation groove 211. A pressure sensor 213 is disposed in the installation groove 211. The detection end of the pressure sensor 213 is fixedly connected to the elastic force-bearing membrane 212. The installation cylinder 1 contains a battery, a controller, and a buzzer electrically connected to the pressure sensor 213. When the pressure sensor 213 detects that the pressure exceeds a set threshold, the controller will control the buzzer to operate to emit a prompt sound, prompting the patient to urinate in time. A mounting plate 23 is fixedly installed on the front of the main body 21. The mounting plate 23 extends along the cross-sectional direction of the main body 21. A push plate 24 for controlling the rotation of the valve core 2 is provided at the end of the mounting plate 23 away from the main body 21. Several uniformly arranged anti-slip textures are provided on both sides of the push plate 24. An arc-shaped limiting groove 231 is opened on the mounting plate 23. A fixing column 11 is fixedly installed on the mounting cylinder 1. The fixing column 11 is movably installed in the arc-shaped limiting groove 231.

[0047] It should be noted that in this embodiment, the connecting tube 3 is connected to the end of the urinary catheter, so that the urinary catheter valve can replace the traditional urine collection bag, which makes it convenient for patients using the urinary catheter to move around. When the amount of urine in the patient's bladder increases to a certain limit, the pressure sensor 213, together with the controller and the buzzer, prompts the patient to urinate in time, which enhances the safety and reliability of the urinary catheter valve during use.

[0048] Optionally, in some embodiments, a vibrator may be used instead of a buzzer, or a buzzer with adjustable modes and volume may be used. When the patient has the ability to move independently, the vibration mode can be used to reduce the patient's psychological pressure during use and effectively avoid causing negotiation problems for the user. At the same time, the user can also adjust the volume of the buzzer according to their own usage environment to meet the needs of different usage environments.

[0049] Please refer to Figure 1 In some embodiments, a bypass pipe 4 is fixedly installed on the connecting pipe 3 near the mounting cylinder 1. The bypass pipe 4 is connected to the connecting pipe 3. A sealing mechanism for switching the connection relationship between the bypass pipe 4 and the connecting pipe 3 is provided inside the connecting pipe 3. The other end of the bypass pipe 4 is movably connected to a liquid storage box 5.

[0050] Alternatively, in some embodiments, the connecting pipe may be a flexible hose as the pipeline.

[0051] In this embodiment, the sealing mechanism includes a plug 41, a fitting piece 42 fixedly installed at the end of the plug 41, a movable rod 43, and an elastic corrugated tube 44 sleeved on the movable rod 43. The plug 41 is movably installed inside the opening of the side outlet tube 4. The plug 41 is cylindrical and has several liquid outlet grooves. The end of the movable rod 43 away from the plug 41 passes through the connecting tube 3. The elastic corrugated tube 44 is fixedly installed between the plug 41 and the tube wall of the connecting tube 3. When the plug 41 blocks the opening of the side outlet tube 4, the fitting piece 42 will be tightly attached to the tube wall of the connecting tube 3 to prevent urine from overflowing.

[0052] In this embodiment, an installation block 6 is fixedly installed between the installation cylinder 1 and the connecting pipe 3. The installation block 6 has an installation cavity. One end of the movable rod 43, which passes through the connecting pipe 3, extends into the installation cavity. A wedge block 431 is fixedly installed at the end of the movable rod 43 that extends into the installation cavity. A miniature push rod 61 is fixedly installed in the installation cavity. The miniature push rod 61 is electrically connected to the controller. A top block 62 that matches the wedge block 431 is fixedly installed at the telescopic end of the miniature push rod 61.

[0053] In this embodiment, the connecting pipe 3 is provided with two fixed cylinders 31 inside. The fixed cylinder 31 is a cone-shaped cylinder with the upper opening larger than the lower opening. The upper opening of the fixed cylinder 31 is fixedly connected to the inner wall of the connecting pipe 3. Both fixed cylinders 31 are located above the sealing mechanism.

[0054] In this embodiment, the bypass pipe 4 is a rubber hose. A connecting end 45 is fixedly installed at the end of the bypass pipe 4 away from the connecting pipe 3. The connecting end 45 is provided with an external thread. The liquid storage box 5 is provided with a threaded connecting seat 51 that is compatible with the connecting end 45. The upper end of the threaded connecting seat 51 is provided with an annular sealing ring. When the liquid storage box 5 is connected to the connecting end 45 through the threaded connecting seat 51, the annular sealing ring ensures the sealing of the connection. The threaded connecting seat 51 is connected to the interior of the liquid storage box 5.

[0055] In this embodiment, a threaded rod 52 is rotatably mounted on the bottom of the liquid storage box 5, and a drive module 53 is fixedly mounted on the upper end of the liquid storage box 5. The drive module 53 includes a battery and a motor. The controller is electrically connected to the battery and the motor. The output shaft of the motor passes through the liquid storage box 5 and is fixedly connected to the upper end of the threaded rod 52. A movable push plate 54 is threadedly connected to the threaded rod 52. The movable push plate 54 is movably mounted inside the liquid storage box 5, and an elastic rubber ring is provided on the side of the movable push plate 54 that contacts the inner wall of the liquid storage box 5. An elastic folding cylinder 55 is sleeved on the threaded rod 52 between the movable push plate 54 and the upper part of the inner wall of the liquid storage box 5. The elastic folding cylinder 55 can form a space for storing urine by enclosing the movable push plate 54 and the liquid storage box 5, which can prevent urine from sticking to the threaded rod 52 and affecting the use of the threaded rod 52.

[0056] In the above embodiments, the method of using the present invention is as follows:

[0057] When in use, connect the connecting tube 3 to the end of the catheter. The protrusion on the connecting tube 3 will fit into the groove at the end of the catheter to ensure that the connecting tube 3 will not detach during use.

[0058] When urine accumulates in the patient's bladder, it flows along the catheter into the connecting tube 3. The elastic pressure membrane 212 is compressed, and the pressure sensor 213 transmits an electrical signal to the controller. When the pressure exceeds the threshold, the controller activates the buzzer to sound an alert, reminding the patient to urinate promptly. Simultaneously, the miniature push rod 61 pushes the top block 62 upward, thereby driving the movable rod 43 and the plug 41 to move through the wedge block 431. This moves the plug 41 away from the opening of the side outlet tube 4. When the plug 41 moves, the discharge groove connects the side outlet tube 4 and the connecting tube 3. The urine in the connecting tube 3 flows through the side outlet tube 4 into the storage box 5, reducing the amount of urine in the catheter and bladder. This also provides the patient with ample time to find or move to the toilet, further reducing the occurrence of bladder overfilling.

[0059] When the outlet tank connects the bypass pipe 4 and the connecting pipe 3, the drive module 53 drives the threaded rod 52 to rotate, causing the movable push plate 54 to move downwards (the initial position of the movable push plate 54 is located at the top of the inner wall of the storage box 5). This can accelerate the speed at which urine enters the storage box 5 and reduce the pressure on the bladder in a timely manner.

[0060] When the patient needs to urinate, the valve core 2 can be rotated by pressing the button 24 and mounting plate 23 until the fixed column 11 abuts against the other side of the arc-shaped limiting groove 231. At this time, the valve pipe 22, the connecting pipe 3 and the output pipe 7 are on the same straight line, and the urine can be discharged outward through the valve pipe 22 and the output pipe 7. When the urine is discharged, the mounting groove 211 on the main body 21 rotates into the mounting cylinder 1, and the pressure on the pressure sensor 213 decreases instantly. At this time, the controller controls the threaded rod 52 to rotate in the opposite direction, and the movable push plate 54 will push the urine in the storage box 5 outward for subsequent use.

[0061] In other words, the key point of this invention is that by connecting the catheter to the end of the catheter, the catheter valve can replace the traditional urine collection bag, facilitating the movement of patients with catheters. When the urine in the patient's bladder increases to a certain limit, the pressure sensor, in conjunction with the controller and buzzer, prompts the patient to urinate in time, enhancing the safety and reliability of the catheter valve. While the pressure sensor, controller, and buzzer prompt the patient to urinate in time, the plug is released from the sealing state of the connecting tube opening, allowing some of the urine in the catheter and bladder to be introduced into the reservoir, reducing the pressure in the patient's bladder and allowing sufficient time for the patient to find a toilet and successfully complete urination.

[0062] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0063] The present invention provides a detailed description of an intelligent portable urinary catheter valve. Specific examples have been used to illustrate the principles and implementation methods of the invention. The descriptions of these embodiments are merely illustrative and are intended to help understand the method and core ideas of the invention. It should be noted that those skilled in the art can make various improvements and modifications to the invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A smart portable urinary catheter valve, characterized in that, include: Mounting cylinder (1), with connecting pipe (3) and output pipe (7) fixedly installed at the upper and lower ends of the mounting cylinder (1), respectively. The valve core (2) includes a main body (21) for being embedded in the mounting cylinder (1) for rotation and a valve tube (22) disposed on the main body (21) along the diameter direction of the main body (21). A pressure sensor (213) is provided on the connecting pipe (3). A battery, a controller and a buzzer are provided inside the mounting cylinder (1) and electrically connected to the pressure sensor (213).

2. The intelligent portable urinary catheter valve according to claim 1, characterized in that, The connecting pipe (3) has an installation groove (211) inside, and an elastic force-bearing membrane (212) is provided at the opening of the installation groove (211). The pressure sensor (213) is located inside the installation groove (211).

3. The intelligent portable urinary catheter valve according to claim 2, characterized in that, A bypass pipe (4) is connected to the connecting pipe (3) near the mounting cylinder (1). A sealing mechanism for switching the connection relationship between the bypass pipe (4) and the connecting pipe (3) is provided inside the connecting pipe (3). A liquid storage box (5) is movably connected to the other end of the bypass pipe (4). The liquid storage box (5) is installed on the valve core (2).

4. The intelligent portable urinary catheter valve according to claim 3, characterized in that, The blocking mechanism includes: The plug (41), the fitting piece (42) and the movable rod (43) are fixedly installed at the end of the plug (41), and the elastic corrugated tube (44) is sleeved on the movable rod (43). The plug (41) is movably installed in the opening of the side outlet pipe (4). The end of the movable rod (43) away from the plug (41) passes through the connecting pipe (3). The elastic corrugated tube (44) is fixedly installed between the plug (41) and the pipe wall of the connecting pipe (3).

5. The intelligent portable urinary catheter valve according to claim 4, characterized in that, The plug (41) is cylindrical, and several liquid outlet grooves extending along the direction parallel to the axis of the plug (41) are provided on the plug (41).

6. The intelligent portable urinary catheter valve according to claim 5, characterized in that, An installation block (6) is fixedly installed between the installation cylinder (1) and the connecting pipe (3). The installation block (6) has an installation cavity. One end of the movable rod (43) passes through the connecting pipe (3) and extends into the installation cavity. A wedge (431) is fixedly installed at the end of the movable rod (43) that extends into the installation cavity. A miniature push rod (61) is fixedly installed in the installation cavity. A top block (62) that matches the wedge (431) is fixedly installed at the telescopic end of the miniature push rod (61).

7. The intelligent portable urinary catheter valve according to any one of claims 3-6, characterized in that, The side outlet pipe (4) is fixedly installed with a connecting end (45) at the end away from the connecting pipe (3). The connecting end (45) is provided with an external thread. The liquid storage box (5) is provided with a threaded connecting seat (51) that is compatible with the connecting end (45). The upper end of the threaded connecting seat (51) is provided with an annular sealing ring.

8. The intelligent portable urinary catheter valve according to claim 7, characterized in that, A threaded rod (52) is rotatably installed at the bottom of the liquid storage box (5). A drive module (53) is fixedly installed at the upper end of the liquid storage box (5). The drive module (53) includes a battery and a motor. The output shaft of the motor passes through the liquid storage box (5) and is fixedly connected to the upper end of the threaded rod (52). A movable push plate (54) is threadedly connected to the threaded rod (52). The movable push plate (54) is movably installed inside the liquid storage box (5). An elastic rubber ring is provided on the side of the movable push plate (54) that contacts the inner wall of the liquid storage box (5). An elastic folding cylinder (55) is sleeved on the threaded rod (52) between the movable push plate (54) and the inner wall of the liquid storage box (5).

9. The intelligent portable urinary catheter valve according to claim 8, characterized in that, A mounting plate (23) is fixedly installed on the front of the main body (21). The mounting plate (23) extends along the cross-sectional direction of the main body (21). A button (24) for controlling the rotation of the valve core (2) is provided at one end of the mounting plate (23) away from the main body (21). Several uniformly arranged anti-slip patterns are provided on both sides of the button (24).

10. The intelligent portable urinary catheter valve according to claim 9, characterized in that, The mounting plate (23) is provided with an arc-shaped limiting groove (231), and a fixing column (11) is fixedly installed on the mounting cylinder (1). The fixing column (11) is movably installed in the arc-shaped limiting groove (231).

Citation Information

Patent Citations

  • Urethral catheter valve

    CN214762788U