Urinary catheter device

Abstract

The application discloses a urinary catheterization device, which comprises a urinary catheter, a urine collecting container and a connecting pipeline connecting the urinary catheter and the urine collecting container. The connecting pipeline comprises a first pipeline and a second pipeline. A self-control drainage device is arranged between the first pipeline and the second pipeline. The self-control drainage device is arranged on the connecting pipeline between the urinary catheter and the urine storage bag. The self-control drainage device is used for controlling the drainage of urine in the bladder. The drainage of urine is related to the pressure in the bladder. The urinary catheterization device can automatically drain urine according to the pressure of urine in the bladder, and is related to the physiological urination of a user. Therefore, the adverse effect of artificial control on the bladder can be avoided.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a urinary catheterization device. Background Technology

[0002] Urinary catheterization is a method of inserting a urinary catheter through the urethra into the bladder to drain urine. It is a routine clinical procedure. Clinically, patients with urinary diseases and acute urinary retention often require catheterization. Sometimes, patients with non-urinary diseases also need catheterization before and after major surgery.

[0003] Currently, the main methods of urinary catheterization include continuous catheterization (indwelling catheter), intermittent catheterization (indwelling catheter), and intermittent catheterization (non-indwelling catheter). Continuous catheterization (indwelling catheter) involves leaving the catheter in place in the patient's body to continuously drain urine from the bladder. The catheter needs to be replaced periodically or removed when the patient's condition permits. The difference between intermittent catheterization (indwelling catheter) and continuous catheterization (indwelling catheter) is that the catheter is manually controlled at intervals to allow for catheterization. Intermittent catheterization (non-indwelling catheter) involves inserting the catheter into the bladder periodically for catheterization, and then removing the catheter after the bladder is emptied.

[0004] During continuous catheterization, urine is constantly being expelled from the bladder, keeping it in a state of continuous emptying. During this time, the bladder tends to curl up, and if this continues for too long, it can lead to significant bladder contraction, making it unable to store urine and causing frequent urination, making it difficult to retain the catheter or replace the bladder fistula. It also disrupts the normal cyclical physiological processes of bladder filling and emptying, leading to neurological disorders related to the urge to urinate. For a period after catheterization is removed, patients may experience frequent loss of urge to urinate and urinary incontinence due to these neurological disturbances. Therefore, it is necessary to urinate periodically to maintain bladder capacity and prevent bladder contraction and further neurological disorders. However, intermittent catheterization, which involves manually controlling the catheter system, can address bladder contraction and neurological disorders, but if the patient is unable to operate the system or is unavailable, leakage or bladder injury may occur.

[0005] Currently used urinary catheterization devices typically consist of a catheter and a urine bag. One end of the catheter is inserted into the bladder through the urethra, and the other end is connected to the urine bag (or urine bottle) via a connecting tube. A latch on the connecting tube clamps the tube to control the opening of the catheterization device and regulate the urine flow. The latch has unequal clamping gaps. When the connecting tube is located on the side with the larger gap, it remains unobstructed and undeformed. Moving it from the larger gap side to the smaller gap side causes the connecting tube to deform until it fits against the inner wall, sealing the connection. Adjusting the catheterization device using a latch requires manual control and cannot establish a connection with the user's urination physiology. Both excessively frequent and insufficient urination can adversely affect the bladder and impair bladder function. Summary of the Invention

[0006] The purpose of this invention is to address the limitations of existing technologies in automatically achieving the normal, cyclical physiological processes of bladder filling and emptying. This invention provides a catheterization device that is correlated with the user's urination physiology, allowing catheterization to function like normal physiological urination and avoiding the adverse effects of manual control on the bladder.

[0007] To achieve the above objectives, the technical solution adopted in this application is as follows: A urinary catheterization device includes a urinary catheter, a urine collection container, and a connecting pipeline connecting the urinary catheter and the urine collection container. The connecting pipeline includes a first pipeline and a second pipeline, and a self-controlled drainage device is provided between the first pipeline and the second pipeline. The self-controlled drainage device is provided with an inlet, an air inlet A, an outlet, an inner cavity A, an inner cavity B, and an energy storage and pressure accumulating mechanism. The inlet is connected to the inner cavity A and is connected to the urinary catheter through the first pipeline. The inner cavity A is unidirectionally connected to the outside atmosphere through the air inlet A. The outlet is connected to the inner cavity B and is connected to the urine collection container through the second pipeline. The inner cavity A and the inner cavity B are connected by a liquid channel. An energy storage and pressure accumulating mechanism is provided between the inner cavity A and the inner cavity B, and the energy storage and pressure accumulating mechanism controls the opening or closing of the liquid channel.

[0008] As a preferred embodiment, the inner cavity A is unidirectionally connected to the outside atmosphere through an air inlet A equipped with a one-way valve A.

[0009] As a preferred method, the second pipeline is unidirectionally connected to the outside atmosphere through the air inlet B.

[0010] In a preferred embodiment, the energy storage and pressure accumulator mechanism includes an elastic sealing plug and an adjusting member. The upper end of the elastic sealing plug is used to block the liquid passage, and the lower end is connected to the adjusting member, which squeezes the sealing plug.

[0011] More preferably, the adjusting member is threaded into the lower part of the inner cavity B, and an adjusting hole is provided at the center of the lower side of the adjusting member, with a leakage hole provided on the outside of the adjusting hole.

[0012] More preferably, the adjustment hole is a polygonal hole.

[0013] More preferably, the adjusting member is movable relative to the inner cavity B and seals with the inner cavity B. The upper end of the adjusting member acts on the elastic sealing plug. The interior of the adjusting member is hollow to form an inner cavity. A leakage hole is provided at the upper part, and a drain pipe is formed at the lower end. The adjusting member connects the inner cavity B and the drain pipe through the leakage hole and the inner cavity of the adjusting member. The drain pipe extends downward to the outside of the housing. The outer wall of the drain pipe of the adjusting member is provided with external threads, and an adjusting nut is provided at the lower end of the housing. The external threads cooperate with the adjusting nut.

[0014] As a preferred embodiment, the energy storage and pressure accumulator mechanism includes an elastic sealing plug, the upper end of which is used to block the liquid channel, and a leakage hole is provided at the lower part, which is connected to the liquid outlet.

[0015] As a preferred embodiment, the energy storage and pressure accumulator mechanism includes a sealing seat and a spring. The upper end of the sealing seat is used to block the liquid passage, and the lower end is connected to the spring. The upper end of the spring abuts against the sealing seat, and the lower end abuts against the bottom of the inner cavity B.

[0016] As a preferred embodiment, the energy storage and pressure accumulating mechanism includes a sealing seat, a spring, and an adjusting seat. The upper end of the sealing seat is used to block the liquid passage, and the lower end is connected to the spring. The upper end of the spring abuts against the sealing seat, and the lower end abuts against the adjusting seat. The adjusting seat can move relative to the inner cavity B. The lower end of the adjusting seat forms a drain pipe, which extends downward to the outside of the housing.

[0017] More preferably, the outer wall of the drain pipe of the adjusting seat is provided with external threads, and the lower end of the housing is provided with an adjusting nut, with the external threads engaging with the adjusting nut.

[0018] A sealing ring is provided between the adjusting seat and the inner wall of the inner cavity B.

[0019] More preferably, the outer side of the through hole of the lower shell is provided with an annular protrusion, and the adjusting nut is provided with an annular groove that mates with the annular protrusion.

[0020] More preferably, the adjusting nut is provided with a protective sleeve that engages with the housing.

[0021] As a preferred embodiment, the inner cavity A is provided with a shell B, which forms the inner cavity B. A liquid channel is formed at the lower end of the shell B, and the liquid channel is located below the inner cavity A. The energy storage and pressure accumulating mechanism includes a weight, which is used to close or open the liquid channel.

[0022] The urine collection container is a urine bag made of elastomer; or a urine bottle / bag made of rigid material, with an air inlet pipe that communicates with the atmosphere.

[0023] The beneficial effects of this invention are as follows: A self-controlled drainage device is installed on the connecting tubing between the catheter and the urine collection bag. This device consists of two chambers, A and B. The opening and closing of the fluid channel between the two chambers is controlled by an energy storage and pressure accumulating mechanism. The pressure within the bladder during urination depends on this mechanism. This invention controls the discharge of urine from the bladder through the self-controlled drainage device. Urine discharge is related to the pressure within the bladder and is associated with the user's urination physiology, avoiding the adverse effects of manual control on the bladder. This device can be adapted to different bladder pressures. By adjusting the pressure setting of the self-controlled drainage device, it can be made equivalent to the user's bladder pressure (bladder pressure can stimulate the nerves of the urinary system to produce the urge to urinate). Using this device, the normal physiological cycle of bladder filling and emptying can be easily achieved. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of a urinary catheterization device.

[0026] Figure 2 This is a schematic diagram of the first type of self-controlled drainage device.

[0027] Figure 3 This is a schematic diagram of the second type of self-controlled drainage device.

[0028] Figure 4 This is a schematic diagram of the third type of self-controlled drainage device.

[0029] Figure 5 This is a schematic diagram of the fourth type of self-controlled drainage device.

[0030] Figure 6 This is a schematic diagram of the fifth type of self-controlled drainage device.

[0031] Figure 7 This is a schematic diagram of the sixth type of self-controlled drainage device.

[0032] Figure 8 This is a schematic diagram of another type of catheterization device.

[0033] Figure 9 yes Figure 8 Enlarged view of point A in the middle.

[0034] In the diagram: 1. Urinary catheter; 2. Connecting tubing; 21. First tubing; 22. Second tubing; 3. Self-controlled drainage device; 31. Housing; 311. Upper housing; 312. Middle housing; 313. Lower housing; 314. Annular protrusion; 315. Inner cavity A; 316. Inner cavity B; 317. Housing B; 318. Liquid channel; 319. Air inlet A; 32. Liquid inlet; 33. Liquid outlet; 34. Drain pipe; 341. External thread; 35. One-way valve A; 36. Vent; 37. Energy storage and pressure accumulator mechanism. 371 Elastic sealing plug, 372 Adjusting element, 3721 External thread, 3722 Adjusting hole, 3723 Leakage hole, 3724 Adjusting element inner cavity, 373 Sealing seat, 374 Spring, 375 Adjusting seat, 376 Sealing ring, 377 Adjusting nut, 3771 Annular groove, 3772 Thread, 378 Weight, 379 Sealing element, 38 Threaded section, 39 Sheath, 4 Urine collection container, 41 Air inlet pipe, 5 Bladder, 6 Air inlet B, 7 One-way valve B. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Example 1

[0037] The catheterization device of the present invention, such as Figure 1As shown, the device includes a urinary catheter 1, a urine collection container 4, and a connecting pipe 2 that connects the urinary catheter 1 and the urine collection container 4. The urinary catheter 1 is inserted into the bladder 5. The connecting pipe 2 includes a first pipe 21 and a second pipe 22. A self-controlled drainage device 3 is provided between the first pipe 21 and the second pipe 22. The self-controlled drainage device 3 is provided with an inlet 32, an air inlet A319, an outlet 33, an inner cavity A315, an inner cavity B316, and an energy storage and pressure accumulating mechanism 37. The outlet 32 ​​is connected to the inner cavity A315 and is connected to the catheter via the first pipe 21. The inner cavity A315 is unidirectionally connected to the outside atmosphere through the air inlet A319. The liquid outlet 33 is connected to the inner cavity B316 and is connected to the urine collection container 4 via the second pipe 22. The inner cavities A315 and B316 are connected by a liquid channel. An energy storage and pressure accumulating mechanism 37 is provided between the inner cavities A315 and B316, which controls the opening or closing of the liquid channel 318. The inner cavity A315 is connected to the air inlet A319, which is equipped with a one-way valve A35.

[0038] The opening and closing of the energy storage and pressure accumulating mechanism 37 is related to the liquid pressure in the inner cavity A315 and the inner cavity B316. The inner cavity A315 is connected to the bladder 5, and its pressure is equal to the urine pressure in the bladder 5. In this embodiment, the self-controlled drainage device 3, as... Figure 2As shown, the energy storage and pressure accumulating mechanism 37 includes an elastic sealing plug 371 and an adjusting member 372. The upper end of the elastic sealing plug 371 is inserted into the liquid channel 318, and the lower end is connected to the adjusting member 372. The adjusting member 372 compresses the elastic sealing plug 371. The elastic sealing plug 371 deforms under the compression of the adjusting member 372, and the internal stress generated by the deformation of the elastic sealing plug 371 is F2. The liquid in the inner cavity A315 exerts a downward pressure F1 on the elastic sealing plug 371, and the liquid in the inner cavity B316 exerts a downward pressure F3 on the elastic sealing plug 371. The pressure in the inner cavity A315 and the bladder 5 depends on the pressure F2 exerted on the elastic sealing plug 371. The value of F2 can be designed based on the pressure in the bladder 5 during normal urination. The pressure in the bladder 5 changes dynamically as the amount of urine increases. The normal pressure in the bladder 5 is between 0-40 cmH2O. For example, the value of F2 can be set to 40 cmH2O. The optimal pressure may vary from person to person. To allow for adjustment of F2 based on individual differences, in this embodiment, the inner wall of the lower part of the inner cavity B316 has a threaded section 38, i.e., it has an internal thread. The outer wall of the adjusting member 372 has an external thread 3721. The outer wall of the adjusting member 372 mates with the threaded section 38 of the inner wall of the inner cavity B316. An adjusting hole 3722 is provided at the center of the lower side of the adjusting member 372, and a leakage hole 3723 is provided on the outer side of the adjusting hole 3722. Liquid in the inner cavity B316 flows to the outlet 33 through the leakage hole 3723. The function of the adjusting hole 3722 is to connect a tool to adjust the position of the adjusting member 372. As a preferred embodiment, the adjusting hole 3722 is a polygonal hole, which mates with a polygonal adjusting rod. Insert the adjusting rod into the adjusting hole 3722, rotate the adjusting member 372 to change the position of the adjusting member 372 in conjunction with the inner cavity B316. Moving the adjusting member 372 upwards increases the deformation of the elastic sealing plug 371, i.e., increases F2. Moving the adjusting member 372 downwards decreases the deformation of the elastic sealing plug 371, i.e., decreases F2. Initially, the elastic sealing plug 371 can be placed at the position of maximum deformation, i.e., maximum F2. If the user feels the urge to urinate but the energy storage and pressure accumulating mechanism 37 is not open, the position of the adjusting member 372 can be adjusted downwards to decrease F2, thus opening the energy storage and pressure accumulating mechanism 37. This allows the user to flexibly adjust the upward F2 applied to the elastic sealing plug 371, providing a better user experience.

[0039] In this embodiment, the self-controlled drainage device 3 includes a housing 31. The upper and lower ends of the housing 31 are respectively provided with a liquid inlet 32 ​​and a liquid outlet 33. The inner cavity of the housing 31 is divided into an inner cavity A315 and an inner cavity B316. The housing 31 includes an upper shell 311, a middle shell 312 and a lower shell 313. The upper shell 311 is provided with a liquid inlet 32 ​​at its upper end. The lower end of the upper shell 311 is assembled with the middle shell 312, and the two form an inner cavity A315. The middle shell 312 is provided with a liquid channel 318. The middle shell 312 has an inner cavity B316. The lower shell 313 is assembled with the upper end of the middle shell 312. The lower end of the lower shell 313 is provided with a drainage pipe 34, which is integrally formed with the lower shell 313. The drainage pipe 34 is connected to the second pipeline 22.

[0040] The urine collection container 4 is a urine bag made of an elastomer. The elastomer expands as urine enters, ensuring smooth flow of urine. The urine collection container 4 can also be a urine bottle / bag made of a rigid material, with an air inlet pipe 41 that communicates with the atmosphere. Example 2

[0041] The main difference between this embodiment and Embodiment 1 is the structure of the self-controlled drainage device 3. (See [link]) Figure 3 As shown, the energy storage and pressure accumulator mechanism 3 includes an elastic sealing plug 371 and an adjusting member. The upper end of the elastic sealing plug 371 is used to block the liquid channel 318, and the lower end is connected to the adjusting member 372, which squeezes the sealing plug. The adjusting member 372 can move relative to the inner cavity B316 and seals with the inner cavity B. The upper end of the adjusting member 372 acts on the elastic sealing plug 371. The interior of the adjusting member 372 is hollow, forming an adjusting member inner cavity 3724. A leakage hole 3723 is provided at the upper part, and a drain pipe 34 is formed at the lower end. The adjusting member 372 connects the inner cavity B and the drain pipe 34 through the leakage hole 3723 and the adjusting member inner cavity 3724. The drain pipe 34 extends downward to the outside of the housing. The outer wall of the drain pipe 34 of the adjusting member 372 is provided with an external thread 341, and an adjusting nut 377 is provided at the lower end of the housing. The drain pipe 34 cooperates with the adjusting nut 377. Liquid flowing into the inner cavity B316 flows into the inner cavity 3724 of the adjusting member through the leakage hole 3723 and flows out through the drain pipe 34. The deformation of the elastic sealing plug 371 can be changed by altering the position between the adjusting member 372 and the adjusting nut 377, thereby controlling the internal stress F2 generated by the deformation of the elastic sealing plug 371. Adjustment of this structure can be made simply by rotating the drain pipe 34, without the need for additional tools.

[0042] The housing 31 of the self-controlled drainage device 3 includes an upper housing 311, a middle housing 312, and a lower housing 313. The upper housing 311 has a liquid inlet 32 ​​at its upper end, and its lower end is assembled with the middle housing 312, forming an inner cavity A315 between them. The middle housing 312 has a liquid channel 318 and an inner cavity B316. The lower housing 313 is assembled with the upper and middle housings 312, and its lower end has a through hole for accommodating a drainage pipe 34. An annular protrusion 314 is provided on the outer side of the through hole in the lower housing 313, and an annular groove 3771 that mates with the annular protrusion 314 is provided on the adjusting nut 377. A protective sleeve 39 is provided on the outside of the adjusting nut 377 to engage with the lower housing 313. This structure secures the adjusting nut 377 to the lower housing 313. Example 3

[0043] The structure of the self-controlled drainage device in this embodiment is as follows: Figure 4 As shown, compared to Embodiment 1, the adjusting component 372 is omitted from the energy storage and pressure accumulating mechanism. In this embodiment, the energy storage and pressure accumulating mechanism includes an elastic sealing plug 371. The upper end face of the elastic sealing plug 371 is used to block the liquid channel 318, and the lower part is provided with a leakage hole 3723, which is connected to the liquid outlet. After the elastic sealing plug 371 is opened, the liquid in the inner cavity A315 flows into the inner cavity B316 through the liquid channel 318, and the liquid in the inner cavity B316 flows into the liquid outlet through the leakage hole 3723 and is discharged. After the shell is assembled, the elastic sealing plug 371 will have a certain pressure, which can be the set (standard) pressure of bladder urination. Example 4

[0044] The main difference between this embodiment and Embodiment 1 is the structure of the self-controlled drainage device 3. (See [link]) Figure 5 As shown, the energy storage and pressure accumulator mechanism 37 includes a sealing seat 373, a spring 374, and an adjusting seat 375. The upper end of the sealing seat 373 is used to block the liquid passage 318, and the lower end is connected to the spring 374. The upper end of the spring 374 abuts against the sealing seat 373, and the lower end abuts against the adjusting seat 375. The adjusting seat 375 can move relative to the inner cavity B316. The lower end of the adjusting seat 375 forms a drain pipe 34, which extends downward to the outside of the housing 31. Adjusting the position of the adjusting seat 375 can change the force exerted by the spring 374 on the sealing seat 373, thereby adjusting the magnitude of the upward force F2 applied by the spring 374 to the sealing seat 373.

[0045] As a preferred structure, the outer wall of the drain pipe 34 of the adjusting seat 375 is provided with an external thread 341, and the lower end of the housing 31 is provided with an adjusting nut 377. The outer wall of the drain pipe 34 is provided with an external thread 3721, and the inner wall of the adjusting nut 377 is provided with an internal thread 3772. The drain pipe 34 and the adjusting nut 377 are threadedly engaged. By adjusting the relative position of the drain pipe 34 and the adjusting nut 377, the position of the adjusting seat 375 can be adjusted. With this structure, adjustment can be made simply by rotating the drain pipe 34, without the need for additional tools.

[0046] In this embodiment, a sealing ring 376 is provided between the adjusting seat 375 and the inner wall of the inner cavity B316 to ensure a tight fit between the adjusting seat 375 and the inner cavity B316 and prevent leakage.

[0047] As a preferred embodiment, the housing 31 of the self-controlled drainage device 3 includes an upper housing 311, a middle housing 312, and a lower housing 313. The upper housing 311 has a liquid inlet 32 ​​at its upper end, and its lower end is assembled with the middle housing 312, forming an inner cavity A315 between them. The middle housing 312 has a liquid channel 318 and an inner cavity B316. The lower housing 313 is assembled with the upper and middle housings 312, and its lower end has a through hole for accommodating the drainage pipe 34. An annular protrusion 314 is provided on the outer side of the through hole in the lower housing 313, and an annular groove 3771 that mates with the annular protrusion 314 is provided on the adjusting nut 377. A protective sleeve 39 is provided on the outside of the adjusting nut 377 to engage with the lower housing 313. This structure secures the adjusting nut 377 to the lower housing 313. Example 5

[0048] The structure of the self-controlled drainage device 3 in this embodiment is shown in [reference]. Figure 6 As shown, the adjusting seat 375 structure is omitted from the embodiment 4. The energy storage and pressure accumulating mechanism 37 includes a sealing seat 373 and a spring 374. The upper end of the sealing seat 373 is used to block the liquid channel 318, and the lower end is connected to the spring 374. The upper end of the spring 374 abuts against the sealing seat 373, and the lower end abuts against the bottom of the inner cavity B316. After the housing 31 is sealed and assembled, the spring 374 will have a certain pressure, which can be the set (standard) pressure for bladder urination. Example 6

[0049] The structure of the self-controlled drainage device 3 in this embodiment is shown in [reference]. Figure 7As shown, an inner cavity A315 contains a housing B317, which forms an inner cavity B316. A liquid channel 318 is formed at the lower end of the housing B317, located below the inner cavity A315. The energy storage and pressure accumulating mechanism 37 includes a weight 378, which closes or opens the liquid channel 318. More preferably, a sealing element 379 is provided below the weight 378, which closes or opens the liquid channel 318. When the upward force of the liquid entering the inner cavity A315 is greater than the downward force of the weight 378, the weight 378 moves upward, opening the liquid channel 318; or, when the liquid in the inner cavity A315 can overcome the downward pressure exerted by the weight 378 on the sealing element 379, the sealing element 379 opens, and the liquid flows from the liquid channel 318 into the inner cavity B316 and out from the outlet. Example 7

[0050] Compared to Example 1, the difference in this example is that the second pipeline 22 is unidirectionally connected to the outside atmosphere through the air inlet B6. A one-way valve B7 is provided at the air inlet B6 to facilitate unidirectional flow. The advantage of this structure is that it facilitates the discharge of liquid from the second pipeline 22. The self-controlled liquid discharge device 3 in Examples 1-6 can all be applied to Example 7.

[0051] The working principle of this invention is that the elastic sealing plug or sealing seat 373 or the weight 378 allows the bladder to accumulate fluid and generate bladder pressure. The force generated by this structure is opposite to the bladder pressure. A one-way valve A, which allows unidirectional flow between the atmosphere and the bladder, allows the bladder to return to its initial fluid-free state. The one-way valve A should be closed when force is applied in its normal or reverse blocking direction, and the opening force during forward flow should be as small as possible. Normal fluid flow generates a force that should be greater than the force generated by the elastic sealing plug 371, sealing seat 373, or weight 378, to ensure that all fluid in the entire system is drained.

[0052] Specifically, the working process of the present invention will be described in detail using the elastic sealing plug 371 or sealing seat 373 structure (Examples 1-5). In Example 6, the liquid in the inner cavity A315 generates an upward force F1 on the weight 378 of the self-controlled drainage device 3, and the weight 378 is subjected to a gravity F2. The liquid entering the inner cavity B316 generates an upward buoyancy force F3 on the weight 378. The direction of the force is opposite to that of the elastic sealing plug 371 or sealing seat 373 structure, but the principle is similar.

[0053] (1) Urine in bladder 5 enters the inner cavity A315 of self-controlled drainage device 3 through catheter 1. The liquid in inner cavity A315 exerts downward pressure F1 on the elastic sealing plug 371 or sealing seat 373 of self-controlled drainage device 3. The internal stress generated by the deformation of elastic sealing plug 371 or the upward force F2 applied to sealing seat 373 by spring 374 is less. When there is less urine in bladder 5, F1 < F2, and elastic sealing plug 371 or sealing seat 373 closes the liquid channel 318.

[0054] (2) As the amount of urine in the bladder 5 and the inner cavity A315 gradually increases, the pressure F1 gradually increases. When F1=F2, the liquid channel 318 is in a critical state of opening and closing. At this time, as the amount of liquid entering the inner cavity A315 increases, the liquid channel 318 in the inner cavity A315 will gradually enter the inner cavity B316. The urine gradually enters the inner cavity B316 and the second tube 22, and due to gravity, a pressure F3 is formed. The liquid in the inner cavity B316 exerts a downward pressure F3 on the elastic sealing plug 371 or sealing seat 373. At this time, the air in the inner cavity B316 and the second tube 22 will be expelled.

[0055] (3) When F1+F3>F2, the elastic sealing plug 371 or sealing seat 373 is opened, forming a rapid and stable liquid flow. At this time, F1 decreases due to the reduction of urine, and F3 increases due to the increase of urine in the second pipeline 22. That is, F1+F3 is always greater than F2, and the liquid flows from the inner cavity A315 into the inner cavity B316.

[0056] (4) When there is no urine in bladder 5 and inner cavity A315 (i.e., F1=0), F3 is still greater than F2 (meaning the second tube 22 needs to be high enough for the pressure F3 generated by the liquid inside the tube to be greater than F2). The liquid in the second tube 22 continues to descend under the influence of gravity. As the liquid descends, negative pressure gradually forms in inner cavity A315 and inner cavity B316, and gradually increases. At this time, the liquid in the second tube 22 is subjected to two forces: the downward force of gravity generated by itself and the upward force generated by the negative pressure. The gradually increasing negative pressure has an inhibitory effect (slows down) on the flow rate of the liquid in the second tube 22.

[0057] (5) As the liquid level in the second pipeline 22 continues to decrease, the negative pressure in the inner cavities A315 and B316 continues to increase. When the negative pressure increases to a certain level, the one-way valve A35 is opened, and the inner cavities A315 and B316 are connected to the external atmospheric pressure through the vent 36, i.e., the inner cavities A315 and B316 are at atmospheric pressure. The sealing element (elastic sealing plug 371 or sealing seat 373) seals the liquid passage 318 between the inner cavities A315 and B316 under the action of the pre-tightening force. The upper and lower ends of the liquid in the second pipeline 22 are at atmospheric pressure. Under the action of gravity, the liquid will continue to flow, the liquid level will continue to decrease, and a negative pressure will be formed in the inner cavity B316 and gradually increase. When the force formed by the pressure difference on both sides of the sealing element is greater than the pre-tightening force, the sealing passage will be opened, and the air pressure in the inner cavity B316 will be atmospheric pressure again due to the replenishment of air. The above process is repeated.

[0058] (6) The upper and lower ends of the liquid in the second pipe 22 are connected to atmospheric pressure. Under the action of gravity, the liquid flows out completely from the second pipe 22 (the structure in Example 1 requires the second pipe 22 to be long enough so that the liquid in the second pipe can overcome the resistance). However, with the structure in Example 7, when the liquid level in the second pipe 22 drops below the one-way valve B7, the negative pressure at the upper end of the liquid level will open the one-way valve B7. That is, the second pipe 22 and the inner cavity B316 are at atmospheric pressure. Since the one-way opening pressure of the one-way valve B7 is small and the inner cavity B316 can have a certain negative pressure, the liquid can flow out completely from the second pipe 22.

[0059] (7) Proceed to the next cycle.

[0060] The urinary catheterization device of this invention is suitable for users with normal urination physiology. It controls the discharge of urine from the bladder 5 through a self-controlled drainage device 3. This is achieved through the design of an upward force F2 exerted on the sealing seat 373 by the internal stress generated by the deformation of the elastic sealing plug 371 or the spring 374, a downward pressure F1 exerted by the liquid in the inner cavity A315 on the elastic sealing plug 371 or the sealing seat 373, and a downward pressure F3 exerted by the liquid in the inner cavity B316 on the elastic sealing plug 371 or the sealing seat 373. A one-way valve A35 is also provided on the inner cavity A315 to ensure that the energy storage and pressure accumulating mechanism 37 automatically opens the liquid channel 318 during physiological urination and automatically closes the liquid channel 318 after urination, allowing urine to smoothly enter the urine collection container 4. The urine discharge of this urinary catheterization device is related to the pressure within the bladder 5, enabling the device to automatically discharge urine according to the urine pressure in the bladder 5, thus relating it to the user's urination physiology and avoiding the adverse effects of manual control on the bladder 5. In Examples 3, 5, and 6, the pressure generated by the elastic sealing plug, sealing seat (and spring), and weight is used to set the (standard) pressure for bladder emptying. In Examples 1, 2, and 4, the pressure generated by the elastic sealing plug or sealing seat is adjusted using the adjusting element 372 or adjusting seat, which can be used to accommodate different bladder pressures. By adjusting the pressure setting of the self-controlled drainage device, it can be made equivalent to the user's bladder pressure (bladder pressure can stimulate the nerves of the urinary system to produce the urge to urinate). This invention can easily realize the normal physiological cycle of bladder filling and emptying.

[0061] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A urinary catheterization device, comprising a urinary catheter, a urine collection container, and a connecting pipe connecting the urinary catheter and the urine collection container, characterized in that: The connecting pipeline includes a first pipeline and a second pipeline, with a self-controlled drainage device installed between them. The self-controlled drainage device is equipped with an inlet, an air inlet A, an outlet, an inner cavity A, an inner cavity B, and an energy storage and pressure accumulating mechanism. The inlet is connected to inner cavity A and then to a catheter via the first pipeline. Inner cavity A is unidirectionally connected to the outside atmosphere via the air inlet. The outlet is connected to inner cavity B and then to a urine collection container via the second pipeline. Inner cavity A and inner cavity B are connected by a liquid channel. An energy storage and pressure accumulating mechanism is installed between inner cavity A and inner cavity B, controlling the opening and closing of the liquid channel. The energy storage and pressure accumulating mechanism includes an elastic sealing plug and an adjusting component. The upper end of the elastic sealing plug is used to block the liquid channel, and the lower end is connected to the adjusting component, which squeezes the sealing plug. The adjusting component can move relative to the inner cavity B and is sealed with the inner cavity B. The upper end of the adjusting component acts on the elastic sealing plug. The interior of the adjusting component is hollow to form an inner cavity. A leakage hole is provided at the upper part, and a drain pipe is formed at the lower end. The adjusting component connects the inner cavity B and the drain pipe through the leakage hole and the inner cavity of the adjusting component. The drain pipe extends downward to the outside of the shell. The outer wall of the drain pipe of the adjusting component is provided with external threads, and an adjusting nut is provided at the lower end of the shell. The external threads cooperate with the adjusting nut.

2. The catheterization device according to claim 1, characterized in that: The inner cavity A is unidirectionally connected to the outside atmosphere through an air inlet A equipped with a one-way valve A.

3. The catheterization device according to claim 1, characterized in that: The second pipeline is unidirectionally connected to the outside atmosphere through air inlet B.

4. The catheterization device according to claim 1, characterized in that: The adjusting component is threaded into the lower part of the inner cavity B. An adjusting hole is provided at the center of the lower side of the adjusting component, and a leakage hole is provided on the outside of the adjusting hole.

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