Intermittent opening and closing type catheter

Abstract

The invention provides an intermittent opening and closing type catheter which comprises a catheter body, an opening and closing device, an opening and closing device, an opening and closing device, an opening and closing device and an opening and closing device. A drainage cavity, a main air bag cavity and an auxiliary air bag cavity are formed in the catheter, a drainage hole communicated with the drainage cavity is formed in the side portion of the head end of the catheter, the tail end of the catheter is branched to form a plurality of connecting pipes, and the connecting pipes comprise the main connecting pipe corresponding to the drainage cavity, the first side connecting pipe corresponding to the main air bag cavity and the second side connecting pipe corresponding to the auxiliary air bag cavity. The main air bag cavity is cut off at the position close to the drainage hole and forms a main air bag surrounding the catheter by one circle. The auxiliary air bag cavity is cut off on the inner side of the drainage hole and forms an auxiliary air bag surrounding the inner wall of the drainage hole. On one hand, intermittent discharge of urine is realized; on the other hand, bladder inner wall tissues are prevented from entering drainage holes; meanwhile, the problem that the drainage holes are blocked by urine salt crystals or blood clots is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to an intermittently opening and closing urinary catheter. Background Art

[0002] A urinary catheter is a common medical device widely used in clinical medicine, mainly for draining urine, relieving urinary retention, monitoring urine volume, and performing bladder irrigation and other operations. The basic structure of a urinary catheter includes a catheter, a balloon (for fixing the catheter), and a connecting tube.

[0003] Urinary catheters can be divided into two types: single-use and long-term indwelling. Single-use urinary catheters are mainly used for short-term urinary catheterization operations and are usually discarded after a single use. They are suitable for patients who need temporary urination assistance, such as postoperative urinary retention, urinary incontinence, or diagnostic urine collection.

[0004] Indwelling urinary catheters are used for long-term indwelling in the bladder and are usually fixed by a balloon. They are suitable for patients who need continuous urine drainage, such as long-term bedridden patients, intensive care patients, or patients who cannot urinate independently.

[0005] Although indwelling urinary catheters (such as Foley catheters) can effectively drain urine in clinical applications, since the drainage holes are always in an open state during the period inside the bladder, this causes the bladder to never be able to urinate in a normal filling state, which is not conducive to the recovery of bladder function. Moreover, when the bladder is emptied, the bladder wall is easily sucked by the drainage holes when it approaches the urinary catheter, causing discomfort to the patient and may also increase the risk of bladder function damage or infection. Summary of the Invention

[0006] In order to solve the technical problems existing in the background art, the present invention proposes an intermittently opening and closing urinary catheter.

[0007] An intermittently opening and closing urinary catheter proposed by the present invention includes:

[0008] A catheter having a head end and a tail end, and the head end is closed;

[0009] The inside of the catheter has a drainage cavity, a main balloon cavity, and a secondary balloon cavity. A drainage hole communicating with the drainage cavity is provided on the side of the head end of the catheter. The tail end of the catheter bifurcates to form a plurality of connecting tubes, including a main connecting tube corresponding to the drainage cavity, a first side connecting tube corresponding to the main balloon cavity, and a second side connecting tube corresponding to the secondary balloon cavity; the main balloon cavity terminates near the drainage hole and forms a main balloon surrounding the catheter for one week; the secondary balloon cavity terminates inside the drainage hole and forms a secondary balloon surrounding the inner wall of the drainage hole for one week.

[0010] Preferably, a groove surrounding the inner wall of the drainage hole and communicating with the secondary balloon cavity and an elastic wall covering the groove are provided inside the drainage hole.

[0011] Preferably, the catheter is provided with an annular groove that encircles the catheter and communicates with the main airbag cavity near the drainage hole, and an elastic wall that covers the annular groove.

[0012] Preferably, the surface of the catheter is provided with fine textures.

[0013] Preferably, the surface of the catheter is provided with a coating layer of hydrophilic polymer or hydrogel material.

[0014] Preferably, there are multiple drainage holes.

[0015] Preferably, the auxiliary airbag cavity is provided with branch cavities that are located near the drainage holes and have the same number as the drainage holes. Each branch cavity corresponds to a drainage hole and forms a corresponding auxiliary airbag inside the drainage hole.

[0016] Preferably, the number of auxiliary airbag cavities is the same as the number of drainage holes. Each auxiliary airbag cavity has a corresponding second side branch pipe. Each auxiliary airbag cavity corresponds to a drainage hole and forms an auxiliary airbag inside the drainage hole.

[0017] Preferably, the catheter has a clamping cavity or a spiral channel. The surface of the catheter near the lower end of the main airbag is densely distributed with a number of micropores that communicate with the clamping cavity or the spiral channel. Among the connecting pipes formed by bifurcating the tail end of the catheter, there is also a third side connecting pipe that is connected to the clamping cavity or the spiral channel.

[0018] Preferably, there is also a syringe that is connected to the second side connecting pipe and is used for injecting or extracting air medium or liquid medium into or from the auxiliary airbag cavity.

[0019] Preferably, there is also a driver that is connected to the syringe and drives the syringe to perform a pushing or withdrawing action.

[0020] Preferably, the driver includes a base, a driving component installed on the base, and a push rod that is driven by the driving component to expand and contract; the syringe is installed on the base, and its piston is connected to the push rod.

[0021] Preferably, the driver drives the syringe to perform a pushing action once every time period T1, and after the pushing action is completed, it maintains for a time period T2 and then drives the syringe to perform a withdrawing action.

[0022] Preferably, there is also a bladder urine volume sensor for real-time monitoring of the urine volume inside the bladder. The bladder urine volume sensor is connected to the driver, and when the urine volume inside the bladder is less than the lower limit threshold, it sends a pushing instruction to the driver to cause the driver to drive the syringe to perform a pushing action; when the urine volume inside the bladder is greater than the upper limit threshold, it sends a withdrawing instruction to the driver to cause the driver to drive the syringe to perform a withdrawing action.

[0023] In the present invention, a secondary airbag cavity is additionally provided inside the catheter, and a secondary airbag surrounding the inner wall of the drainage hole and communicating with the secondary airbag cavity is additionally provided inside the drainage hole. In the urination state, the secondary airbag is in a contracted state, and the urine in the bladder flows into the drainage cavity through the drainage hole and is discharged out of the body; after urination, the secondary airbag inside the drainage hole is inflated by injecting a gas medium or a liquid medium into the secondary airbag cavity, so that the drainage hole is blocked by the secondary airbag, the drainage hole is closed, and then the catheter enters a non-urination state. In this way, on the one hand, intermittent urine drainage is realized without removing the catheter, which helps to maintain the normal capacity of the bladder, prevent bladder atrophy, and is beneficial to bladder training and recovery of bladder function; on the other hand, it avoids the discomfort of the patient caused by the inhalation of the inner wall tissue of the bladder into the drainage hole when the bladder is in an empty state; at the same time, the secondary airbag can dredge the urinary salt crystals or blood clots stuck in the drainage hole during the inflation and contraction process, solving the problem of blockage of the drainage hole by urinary salt crystals or blood clots. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. is a schematic structural diagram of an intermittent opening and closing catheter proposed by the present invention in a state where the main airbag and the secondary airbag are contracted;

[0025] Figure 2 is Figure 1 an enlarged view of part A;

[0026] Figure 3 FIG. is a schematic structural diagram of an intermittent opening and closing catheter proposed by the present invention in a state where the main airbag and the secondary airbag are inflated;

[0027] Figure 4 is Figure 3 an enlarged view of part B;

[0028] Figure 5 FIG. is a distribution diagram of the third side connection pipe and micropores in an intermittent opening and closing catheter proposed by the present invention;

[0029] Figure 6 FIG. is an assembly schematic diagram of a driver and a syringe in an intermittent opening and closing catheter proposed by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Referring to Figures 1-4 , an intermittent opening and closing catheter proposed by the present invention includes: a catheter 1 having a head end and a tail end, and the head end is closed.

[0031] The inside of the catheter 1 has a drainage cavity, a main airbag 6 cavity and a secondary airbag 7 cavity. A drainage hole 2 communicating with the drainage cavity is provided on the side of the head end of the catheter 1. The tail end of the catheter 1 branches into a plurality of connecting pipes, including a main connecting pipe 3 corresponding to the drainage cavity, a first side connecting pipe 4 corresponding to the main airbag 6 cavity, and a second side connecting pipe 5 corresponding to the secondary airbag 7 cavity.

[0032] The 6 - chamber main airbag terminates near the drainage hole 2 and forms the main airbag 6 around the catheter 1. Specifically: The catheter 1 is provided with an annular groove around the catheter 1 near the drainage hole 2, which is connected to the 6 - chamber main airbag, and an elastic wall covering the annular groove. When gas or liquid medium enters the 6 - chamber main airbag, the elastic wall expands outward to the catheter 1 to prevent the catheter 1 from slipping out of the bladder.

[0033] The 7 - chamber auxiliary airbag terminates inside the drainage hole 2 and forms the auxiliary airbag 7 around the inner wall of the drainage hole 2. Specifically: Inside the drainage hole 2, there is a groove around its inner wall, which is connected to the 7 - chamber auxiliary airbag, and an elastic wall covering the groove. When gas or liquid medium enters the 7 - chamber auxiliary airbag, the elastic wall expands inward to the drainage hole 2 to block the drainage hole 2.

[0034] During urination, the auxiliary airbag 7 contracts, the drainage hole 2 is opened, and the urine in the bladder flows into the drainage cavity through the drainage hole 2 and is discharged out of the body. After urination, by injecting gas medium or liquid medium into the 7 - chamber auxiliary airbag, the auxiliary airbag 7 expands inward to the drainage hole 2 to block the drainage hole 2, closing the drainage hole 2, so that the catheter enters the non - urination state. On the one hand, this realizes the intermittent discharge of urine, helps with bladder training, restores bladder function, maintains the normal capacity of the bladder, and prevents bladder atrophy; on the other hand, it avoids the bladder inner wall tissue from entering the drainage hole 2, reducing the discomfort of the patient; at the same time, the auxiliary airbag 7 can dredge the urinary salt crystals or blood clots stuck in the drainage hole 2 during one expansion and one contraction, solving the problem of blockage of the drainage hole 2 by urinary salt crystals or blood clots.

[0035] In this embodiment, multiple drainage holes 2 are provided. The design of multiple drainage holes 2 can disperse the pressure in the bladder, avoid damage to the bladder wall caused by too high local pressure, and the multiple drainage holes 2 can drain urine more evenly, reduce local irritation of the bladder wall, reduce the occurrence of bladder spasm and pain, and the design of multiple drainage holes 2 can improve the drainage efficiency, shorten the bladder emptying time, and reduce the discomfort of the patient.

[0036] Furthermore, the 7 - chamber auxiliary airbag is provided with branch chambers with the same number as the drainage holes 2 near the location of the drainage hole 2. Each branch chamber corresponds to a drainage hole 2 and forms a corresponding auxiliary airbag 7 inside the drainage hole 2. This structural design with one 7 - chamber auxiliary airbag corresponding to multiple auxiliary airbags 7 can complete the synchronous opening and closing of each drainage hole 2.

[0037] Alternatively, the number of 7 - chamber auxiliary airbags is the same as the number of drainage holes 2. Each 7 - chamber auxiliary airbag has a corresponding second side branch pipe. Each 7 - chamber auxiliary airbag corresponds to a drainage hole 2 and forms an auxiliary airbag 7 inside the drainage hole 2. This structural design with one 7 - chamber auxiliary airbag corresponding to one auxiliary airbag 7 can make each drainage hole 2 open and close independently.

[0038] In addition, in this embodiment, micro-textures are provided on the surface of the catheter 1 to disperse the pressure during insertion and reduce the local irritation to the urethral mucosa. A hydrophilic polymer or hydrogel material coating layer is provided on the surface of the catheter 1 to reduce the frictional resistance during insertion and relieve the pain of the patient.

[0039] Refer to Figure 5 , in this embodiment, a clamping cavity or a spiral channel is provided between the inner and outer walls of the catheter 1. A plurality of micropores communicating with the clamping cavity or the spiral channel are densely distributed on the surface of the catheter 1 near the lower end of the main airbag 6. In the connecting tube formed by bifurcating the tail end of the catheter 1, a third side connecting tube 8 connected to the clamping cavity or the spiral channel is further included. During catheter insertion or extraction, a liquid medicine is injected into the clamping cavity or the spiral channel through the third side connecting tube 8 and discharged through the micropores, so as to form a liquid medicine diaphragm between the outer wall of the catheter 1 and the inner wall of the urethra. On the one hand, this can reduce the friction between the catheter 1 and the urethra and relieve the pain of the patient; on the other hand, the liquid medicine can play a good therapeutic role on the urethra.

[0040] Refer to Figure 6 , an intermittently open and closed catheter proposed by the present invention further includes a syringe 9 connected to the second side connecting tube 5 for injecting or extracting an air medium or a liquid medium into or from the cavity of the auxiliary airbag 7, and a driver 10 connected to the syringe 9 for driving the syringe 9 to perform a pushing or withdrawing action. Specifically: the driver 10 includes a base 101, a driving component 102 mounted on the base 101, and a push rod 103 that is driven by the driving component 102 to expand and contract; the syringe 9 is mounted on the base 101, and its piston is connected to the push rod 103 to drive the piston in the syringe 9 to move by the expansion and contraction of the push rod 103, thereby completing the injection or withdrawal action. During use, the drainage hole 2 is controlled to open and close regularly by using the driver 10, and then the timed urination control is realized. Specifically: the driver 10 drives the syringe 9 to perform a pushing action every interval of a time period T1 to push the medium into the auxiliary airbag 7, so that the auxiliary airbag 7 expands to block the drainage hole 2 and enter a non-urination state; and after the pushing action is completed, after maintaining a time period T2, the driver 10 drives the syringe 9 to perform a withdrawing action, that is: after the auxiliary airbag 7 maintains a time period T2 in the expanded state, the medium in the auxiliary airbag 7 is extracted, so that the auxiliary airbag 7 contracts and the drainage hole 2 is reopened for urination.

[0041] In addition, a bladder urine volume sensor can be set up to monitor the urine volume inside the bladder in real time. The driver 10 drives the syringe 9 to perform a pushing or withdrawing action according to the urine volume detected by the bladder urine volume sensor. Specifically, the bladder urine volume sensor is connected to the driver 10. When the urine volume in the bladder is less than the lower threshold (i.e., the urine volume in the bladder is less than the discharge value), a pushing instruction is sent to the driver 10 to make the driver 10 drive the syringe 9 to perform a pushing action to push the medium into the auxiliary airbag 7, so that the auxiliary airbag 7 expands to block the drainage hole 2. When the urine volume in the bladder is greater than the upper threshold (i.e., the urine volume in the bladder is greater than or equal to the discharge value), a withdrawing instruction is sent to the driver 10 to make the driver 10 drive the syringe 9 to perform a withdrawing action to withdraw the medium from the auxiliary airbag 7, so that the auxiliary airbag 7 contracts and the drainage hole 2 is reopened.

[0042] As can be seen from the above, in the present invention, an auxiliary airbag 7 cavity is added inside the catheter 1, and an auxiliary airbag 7 that surrounds the inner wall of the drainage hole 2 for one week and is connected to the auxiliary airbag 7 cavity is added inside the drainage hole 2. In the urination state, the auxiliary airbag 7 is in a contracted state, and the urine in the bladder flows into the drainage cavity through the drainage hole 2 and is discharged out of the body; after urination, the auxiliary airbag 7 inside the drainage hole 2 is inflated by injecting a gas medium or a liquid medium into the auxiliary airbag 7 cavity to block the drainage hole 2 and seal the drainage hole 2, so that the catheter enters a non-urination state. On the one hand, intermittent urine discharge is achieved without removing the catheter, which helps to maintain the normal capacity of the bladder, prevent bladder atrophy, and is conducive to bladder training and recovery of bladder function; on the other hand, it avoids the discomfort of the patient caused by the inner wall tissue of the bladder being sucked into the drainage hole 2 when the bladder is in an empty state; at the same time, the auxiliary airbag 7 can dredge the urinary salt crystals or blood clots stuck in the drainage hole 2 during the expansion and contraction process, solving the problem of blockage of the drainage hole 2 by urinary salt crystals or blood clots.

[0043] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. An intermittent opening and closing urinary catheter, characterized in that: include: A catheter (1) having a head end and a tail end, wherein the head end is closed; The interior of the catheter (1) comprises a drainage cavity, a main airbag cavity and a secondary airbag cavity; a drainage hole (2) communicating with the drainage cavity is provided on the side of the front end of the catheter (1); the rear end of the catheter (1) is bifurcated to form a plurality of connecting tubes, including a main connecting tube (3) corresponding to the drainage cavity, a first side connecting tube (4) corresponding to the main airbag cavity and a second side connecting tube (5) corresponding to the secondary airbag cavity; the main airbag cavity is terminated near the drainage hole (2) to form a main airbag (6) surrounding the catheter (1); the secondary airbag cavity is terminated on the inner side of the drainage hole (2) to form a secondary airbag (7) surrounding the inner wall of the drainage hole (2).

2. The intermittent opening and closing urinary catheter according to claim 1, characterized in that: The inner side of the drainage hole (2) is provided with a groove which surrounds the inner wall thereof and is connected to the auxiliary air bag (7) cavity, and an elastic wall covering the groove.

3. The intermittent opening and closing urinary catheter according to claim 1, characterized in that: The catheter (1) is provided with an annular groove around the catheter (1) and connected to the main air bag (6) cavity near the drainage hole (2), and an elastic wall covering the annular groove.

4. The intermittent opening and closing urinary catheter according to claim 1, characterized in that: The surface of the catheter (1) is provided with fine textures.

5. The intermittent opening and closing urinary catheter according to claim 1, characterized in that: The surface of the catheter (1) is provided with a coating layer of a hydrophilic polymer or a hydrogel material.

6. The intermittent opening and closing urinary catheter according to claim 1, characterized in that: A plurality of drainage holes (2) are provided.

7. The intermittent opening and closing urinary catheter according to claim 6, characterized in that: The auxiliary airbag (7) cavity is provided with branch cavities in the same number as the drainage holes (2) near the drainage holes (2), each branch cavity corresponds to a drainage hole (2) and forms a corresponding auxiliary airbag (7) inside the drainage hole (2).

8. The intermittent opening and closing urinary catheter according to claim 6, characterized in that: The number of auxiliary airbag (7) cavities is consistent with the number of drainage holes (2), each auxiliary airbag (7) cavity has a second side branch corresponding thereto, each auxiliary airbag (7) cavity corresponds to a drainage hole (2) and an auxiliary airbag (7) is formed inside the drainage hole (2).

9. The intermittent opening and closing urinary catheter according to claim 1, characterized in that: The catheter (1) has a cavity or a spiral channel. The surface of the catheter (1) close to the lower end of the main airbag (6) is densely covered with a plurality of micropores connected to the cavity or the spiral channel. The connecting tube formed by the fork at the tail end of the catheter (1) also includes a third side connecting tube (8) connected to the cavity or the spiral channel.

10. The intermittent open-and-close urinary catheter according to any one of claims 1 to 9, characterized in that: It also includes a syringe (9) connected to the second side connecting tube (5) for injecting or extracting air medium or liquid medium into the auxiliary airbag (7) cavity; Preferably, it also includes a driver (10) connected to the syringe (9) to drive the syringe (9) to perform a push injection or a withdrawal action; Preferably, the driver (10) comprises a base (101), a driving component (102) mounted on the base (101), and a push rod (103) driven by the driving component (102) to be extended and retracted; the syringe (9) is mounted on the base (101), and its piston is connected to the push rod (103); Preferably, the driver (10) drives the syringe (9) to perform a push injection action every time interval T1, and after the push injection action is completed, it maintains a time period T2 before driving the syringe (9) to perform a withdrawal action; or, a bladder urine volume sensor for real-time monitoring of the urine volume in the bladder is provided, the bladder urine volume sensor is connected to the driver (10), and when the urine volume in the bladder is less than a lower limit threshold, sends a push injection instruction to the driver (10), so that the driver (10) drives the syringe (9) to perform a push injection action; when the urine volume in the bladder is greater than an upper limit threshold, sends a withdrawal instruction to the driver (10), so that the driver (10) drives the syringe (9) to perform a withdrawal action.

Images