CN106669014B

CN106669014B - Urethral catheterization device

Info

Publication number: CN106669014B
Application number: CN201710183130.7A
Authority: CN
Inventors: 车七石
Original assignee: Guangzhou Rainhome Pharm and Tech Co Ltd
Current assignee: Guangzhou Rainhome Pharm and Tech Co Ltd
Priority date: 2017-03-24
Filing date: 2017-03-24
Publication date: 2022-11-29
Anticipated expiration: 2037-03-24
Also published as: CN106669014A

Abstract

The invention discloses a urethral catheterization device, which comprises a ureter main body, wherein a positioning bag is arranged on the periphery of the upper end part of the ureter main body, and a branch communicated with the inner cavity of the positioning bag is also arranged on the ureter main body; the urine tube main body is also provided with a urine main tube, the urine main tube comprises a urine inlet and a urine outlet, a switch valve is arranged between the urine inlet and the urine outlet and used for connecting or disconnecting the urine inlet and the urine outlet, and the switch valve is close to the urine outlet; compared with the uncontrollable urination in the prior art, the switch valve is arranged in the main urine pipe of the urethral catheterization device, so that a patient can control whether the urine in the bladder is discharged or not by operating the switch valve, and the controllability of urination is realized. Compared with the prior art that the urine bag is carried, the urethral catheterization device is simple in structure and convenient to carry, solves the problem that the carrying of the urine bag is inconvenient after the prostate patient is intubated, and reduces the occurrence of urinary tract infection.

Description

Urethral catheterization device

Technical Field

The invention relates to the technical field of medical instrument washing, in particular to a urethral catheterization device.

Background

Catheterization is one of the common medical operations in clinic, and the catheter is the main tool for realizing catheterization. The catheterization of patients is required before and after the operation of internal medicine diseases, surgical diseases, gynecological diseases, orthopedic diseases and urinary surgery diseases. Especially for prostate patients, long-term catheter insertion is required.

The main structure of the traditional catheter comprises a catheter main body and a urine bag, wherein the catheter main body is provided with a urine circulation channel, and the urine bag is connected to the lower end part of the catheter main body and communicated with an outlet of the urine circulation channel. During the use, inside the upper end of ureter main part was fixed in the human body, the upper end mouth and the bladder intercommunication of urine circulation passageway, inside urine bag was flowed to through urine circulation passageway to the urine.

The catheter with the structure has the following defects when in use: the urination is not controlled artificially, namely, as long as urine exists in the bladder, the urine flows to the inside of the urine bag along the urine flowing channel. And the urine bag needs to be fixed on the body or other positions of the patient, so that the movement of the patient is greatly limited. If the patient is inserted into the body of the patient when the patient requires urination, and the catheter is pulled out after the urination is finished, the patient is painful due to repeated insertion and pulling out, urinary tract infection is easy to occur, and further harm is caused to the physiology and spirit of the patient.

In addition, urine collected in the urine bag can generate certain pulling force on a urinary catheter main body arranged in a patient body due to the self weight, so that the urinary catheter main body is easy to be separated from the patient body, and the urethra is damaged; moreover, the main body of the urinary catheter is usually fixed on the bladder, and the traction force generated by the urinary bag can indirectly act on the bladder, thereby affecting the health of the patient.

Therefore, how to improve the structure of the urinary catheter to control the urination of the patient is an urgent technical problem to be solved by those skilled in the art.

Disclosure of Invention

In order to solve the technical problem, the invention provides a urethral catheterization device which comprises a urethral catheter main body, wherein a positioning bag is arranged on the periphery of the upper end part of the urethral catheter main body, and a branch communicated with the inner cavity of the positioning bag is also arranged on the urethral catheter main body; the ureter main part still has the urine and is responsible for, the urine is responsible for including urine import and urine export, the urine import with still be provided with the ooff valve between the urine export, be used for the intercommunication or the disconnection the urine import with the urine export, and the ooff valve is close to the urine export.

Optionally, the switch valve is positioned inside the urine main pipe, and the switch valve and the urine main pipe are sealed circumferentially; the switch valve comprises a first body and a second body which is sealed in a sliding mode transversely relative to the first body, and a transversely extending elastic component is arranged between the first body and the second body; when the second body and the first body are pressed to move transversely relatively to a preset position, the internal channel of the switch valve is conducted, and the second body compresses or stretches the elastic component in the moving process.

Optionally, the first body is provided with a first passage communicating the urine inlet and the urine outlet, the second body is provided with a second passage, and the second body blocks the first passage in a normal state; when the second body and the first body are pressed to transversely move relatively to a preset position, the first channel is communicated through the second channel.

Optionally, the first body has a valve cavity with an opening at one end, the peripheral wall of the first body is provided with a first through hole and a second through hole which are communicated with the valve cavity, and the first through hole, the second through hole and the valve cavity form the first passage; the second body is transversely arranged in the valve cavity from the opening, and the peripheral wall of the second body is circumferentially sealed with the inner peripheral wall of the valve cavity; under a normal state, the second body part is exposed outside the opening, and the part positioned in the valve cavity blocks the first through hole or the second through hole.

Optionally, the second body includes a valve core shaft and a sealing cover, both of which are transversely slidably disposed inside the valve cavity; the valve core shaft and the valve cavity are circumferentially sealed; the elastic component comprises a first elastic component and a second elastic component; the first elastic component is arranged between the inner end part of the valve core shaft and the inner wall of the valve cavity, and the second channel is arranged on the valve core shaft; the second elastic component is arranged between the sealing cover and the inner wall of the valve cavity, the valve core shaft is exposed outside the valve cavity in a normal state, and the sealing cover covers the first through hole or the second through hole.

Optionally, the inner wall of the valve cavity is further provided with a recessed slide rail, the slide rail extends transversely, and a slide rail which slides in a matching manner with the slide rail is arranged at the corresponding position of the sealing cover.

Optionally, the switch valve is made of hard plastic or soft silica gel.

Optionally, the switch valve is integrally formed with the urinary catheter main body through an injection molding process, and the switch valve is circumferentially wrapped in the urinary catheter main body.

Optionally, along the length direction, the ureter main body comprises a first pipe section and a second pipe section which are detachably connected, the positioning bag is arranged at the upper end of the first pipe section, and the switch valve is arranged at the lower end of the first pipe section; the branch comprises a first branch and a second branch which are communicated with each other and are respectively arranged on the first pipe section and the second pipe section; the lower end part of the first branch is provided with a one-way valve.

Optionally, one of the opposite end surfaces of the first pipe section and the second pipe section is provided with a groove, the other one of the opposite end surfaces of the first pipe section and the second pipe section is provided with a protrusion which is installed in a matching manner with the groove, a metal or magnetic component is arranged in the matching end portion of the first pipe section, an electromagnet is arranged on the second pipe section, a lead is further arranged in the second pipe section, and the electromagnet is connected with an external power supply through the lead.

Compared with the uncontrollable urination in the prior art, the switch valve is arranged in the main urine pipe of the urethral catheterization device, so that a patient can control whether the urine in the bladder is discharged or not by operating the switch valve, and the controllability of urination is realized. Compared with the prior art with a portable urine bag, the urethral catheterization device is simple in structure and convenient to carry, solves the problem that the portable urine bag is inconvenient to move after a prostate patient is intubated, and reduces urinary tract infection.

Drawings

FIG. 1 is a schematic cross-sectional view of a urinary catheterisation apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic sectional view of an on-off valve according to an embodiment of the present invention;

FIG. 3 is a schematic view of the switching valve of FIG. 2 in a conducting state;

FIG. 4 is a schematic structural view of a switching valve according to another embodiment of the present invention;

FIG. 5 is a top view of the switch valve and the main body of the urinary catheter;

fig. 6 is an enlarged view of a portion a of fig. 1.

Wherein, in fig. 1 to 6:

the urinary catheter comprises a urinary catheter body 1, a first tube section 11, a groove 11a, a second tube section 12, a guide wire 121, a protrusion 122, a main urine tube 1a, a first branch 11b and a second branch 12b;

a positioning bag 2;

the switch valve 3, the first body 31, the valve cavity 311, the first through hole 312, the second through hole 313, the second body 32, the valve core shaft 321, the sealing cover 322, the second channel 32a, the elastic component 33, the first elastic component 331, the second elastic component 332 and the silica gel 34;

a one-way valve 4.

Detailed Description

Aiming at the technical problem that the prior catheter discharges urine without being controlled by people in the background art, the intensive research is carried out, and on the basis of the research, a technical scheme for solving the technical problem is provided

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, fig. 1 is a schematic cross-sectional structure view of a urinary catheterization device in an embodiment of the present invention.

The invention provides a urethral catheterization device which is mainly used for guiding urine in a bladder of a patient to the outside of the body. The urethral catheterization device comprises a urethral catheter main body 1, wherein the urethral catheter main body 1 mainly provides a platform for opening other pipelines and installing components. The ureter main part 1 can adopt the softer soft materials of silica gel class, and soft materials can reduce the ureter main part 1 and install when internal in the patient, and the harm of ureter main part 1 to the patient health to and the travelling comfort after the improvement installation.

In addition, in order to reduce the probability of infection caused by the installation of the urinary catheter main body 1 in a patient, the outer wall of the urinary catheter main body 1 may be coated with a nano silver ion coating or a chitosan coating. The nano silver ions or chitosan has the effects of sterilizing and diminishing inflammation.

The periphery of the upper end part of the ureter main body 1 is provided with a positioning bag 2 which is mainly used for positioning the ureter main body 1 and the bladder of the patient. The positioning bag 2 may be in the form of a ring, and the number thereof may be one or more.

Before the ureter main body 1 is positioned with the bladder, no medium exists in the positioning bag 2, and the inside of the positioning bag 2 is basically in a vacuum state, namely the positioning bag 2 is attached to the outer wall of the ureter main body 1. Still be provided with the branch road with 2 inner chambers of location bag intercommunication on the ureter main part 1, install in the internal back of patient when ureter main part 1, fill liquid or gas from the lower extreme of branch road to the inside of location bag 2, 2 inflation volume grow of location bag to be located bladder urethral orifice position. Normally, a check valve 4 is further provided on a branch communicating with the positioning bag 2, the check valve 4 is normally in a closed state, and when the inside of the positioning bag 2 is filled with liquid or gas, the check valve 4 is opened under the action of the pressure of the liquid or gas. When the liquid or gas filling is completed, the check valve 4 is automatically closed. The one-way valve 4 may be a resilient sealing disc.

The ureter main body 1 further comprises a urine main pipe 1a, and the urine main pipe 1a comprises a urine inlet and a urine outlet. The ureter main part 1 is installed in the internal back of patient, and urine import intercommunication bladder inner chamber, urine exit end extend to meeting private parts or penis portion.

The urinary catheterization device further comprises a switch valve 3 which is arranged between the urine inlet and the urine outlet. The on-off valve 3 is used to connect or disconnect the urine inlet and the urine outlet.

In a normal state, the switch valve 3 is in a closed state, namely the urine inlet and the urine outlet are disconnected; when the patient need urinate, because of ooff valve 3 is close to the setting of urine export position, the patient can manually open ooff valve 3, makes urine export and urine import intercommunication to make the inside urine of bladder arrange to external through the urine export, after the urination, the patient adjusts ooff valve 3 to the closed condition again.

Compared with the uncontrollable urination in the prior art, the switch valve 3 is arranged in the main urine pipe 1a of the urethral catheterization device, and a patient can control whether the urine in the bladder is discharged or not by operating the switch valve 3, so that the controllability of urination is realized. Compared with the prior art that the urine bag is carried, the urethral catheterization device is simple in structure and convenient to carry, solves the problem that the carrying of the urine bag is inconvenient after the prostate patient is intubated, and reduces the occurrence of urinary tract infection.

The on-off valve 3 may be positioned inside the main urine pipe 1 a. This reduces the number of parts in contact with the patient, improves the comfort of carrying the urinary catheter, and further reduces the risk of infection.

Referring to fig. 2 and 3, fig. 2 is a schematic cross-sectional view of a switch valve according to an embodiment of the invention; fig. 3 is a schematic view of the switching valve shown in fig. 2 in a conducting state.

Specifically, the on-off valve 3 may include a first body 31 and a second body 32 that is slidable laterally with respect to the first body 31. It should be noted that the transverse direction described herein means a radial direction along the main urine pipe 1 a. A laterally extending elastic member 33 is further provided between the first body 31 and the second body 32.

The first body 31 is provided with a first passage for communicating the urine inlet and the urine outlet, and the second body 32 blocks the first passage in a normal state; when the second body 32 is pressed to move laterally to a predetermined position, the first passage is conducted, i.e., the urine inlet and the urine outlet are conducted through the first passage, and the second body 32 compresses or stretches the elastic member 33 during the movement.

When the pressing force on the second body 32 is removed, the second body 32 is restored to the original position by the restoring force of the elastic member 33, and the first channel is blocked again.

That is to say, when the patient needs to urinate, the second body 32 can be manually pressed to move transversely relative to the first body 31, so that the first passage is communicated, and then the communication between the urine inlet and the urine outlet is realized.

Further, the second body 32 in the above-described embodiment may be provided with a second passage 32a, and the first passage is conducted through the second passage 32 a. That is, after the second body 32 is pressed to move transversely to a predetermined position, the first channel is conducted through the second channel 32 a.

The structure of the first channel may take a variety of forms, and one specific embodiment of the first channel is given below.

Referring to fig. 2 again, in a specific embodiment, the first body 31 has a valve cavity 311 with an open end therein, the first body 31 is provided with a first through hole 312 and a second through hole 313 communicating with the valve cavity 311, and the first through hole 312, the valve cavity 311 and the second through hole 313 form a first passage. The second body 32 is transversely arranged in the valve cavity 311 from the opening, the second body 32 is circumferentially sealed with the inside of the valve cavity 311, the second body 32 is partially exposed out of the valve cavity 311 in a normal state, and the part positioned in the valve cavity 311 blocks the first through hole 312 or the second through hole 313. The elastic member 33 may be connected between an inner end of the second body 32 and the inside of the valve chamber 311, and compresses the elastic member 33 when the second body 32 and the first body 31 are pressed for relative movement.

The elastic member 33 is preferably a spring, but may be other members capable of extending and contracting.

In order to reduce the difficulty of processing the second channel 32a, the second channel 32a may be a vertically-arranged through hole, that is, the first through hole 312 and the second through hole 313 are coaxially arranged.

In this embodiment, the first body 31 is configured as the valve cavity 311, so that the weight of the on-off valve 3 can be reduced as much as possible, the traction force of the on-off valve 3 on the bladder due to the gravity of the on-off valve 3 can be reduced, and the influence of the catheterization device on the body of the patient can be reduced. And the second body 32 is partially located outside the valve cavity 311, facilitating the patient to press the second body 32.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a switch valve 3 according to another embodiment of the present invention.

In another embodiment, the second body 32 may include a spool shaft 321 and a seal cap 322, both of which are slidably disposed laterally inside the valve cavity 311; the spool shaft 321 and the seal cap 322 are laterally juxtaposed. The spool shaft 321 is circumferentially sealed to the valve chamber 311.

The elastic member 33 may specifically include a first elastic member 331 and a second elastic member 332; also, the first and second

elastic members

331 and 332 may be both springs. The first elastic component 331 is arranged between the inner end of the valve core shaft 321 and the inner wall of the valve cavity 311, and the second channel 32a is arranged on the valve core shaft 321; the second elastic component 332 is disposed between the sealing cover 322 and the inner wall of the valve cavity 311, in a normal state, the valve core shaft 321 is partially exposed outside the opening of the valve cavity 311, and the sealing cover 322 covers the first through hole 312 or the second through hole 313. Fig. 4 shows an embodiment in which the sealing cap 322 closes off the second through-hole 313. Through reasonable structural arrangement, the sealing cover 322 can also block the first through hole 312, and the description is omitted here.

When the valve core shaft 321 and the first body 31 are pressed to move transversely, the valve core shaft 321 pushes the sealing covers 322 to move transversely rightward together, that is, the valve core shaft 321 pushes the sealing covers 322 away from the first through hole 312 or the second through hole 313, and when the valve core shaft 321 moves to a predetermined position, the first through hole 312 and the second through hole 313 are communicated through the second channel 32a on the valve core shaft 321.

The spool shaft 321 compresses the first elastic member 331 during rightward movement; the sealing cover 322 compresses the second elastic member 332 during the process of moving rightward, so that when the external force on the valve plug shaft 321 is removed, the valve plug shaft 321 and the sealing cover 322 return to the original positions under the restoring forces of the first elastic member 331 and the second elastic member 332, respectively, i.e., the sealing cover 322 blocks the first through hole 312 or the second through hole 313.

In this embodiment, the second body 32 includes a spool shaft 321 and a sealing cover 322, which are respectively connected to the valve cavity 311 via the first elastic component 331 and the second elastic component 332, so that when the first elastic component 331 fails, the sealing cover 322 can be restored to the original position under the action of the second elastic component 332, thereby increasing the reliability of the urinary catheterization device.

In order to prevent urine from flowing out due to the random sliding of the sealing cap 322, the following arrangement is also possible.

Further, the inner wall of the valve cavity 311 in the above embodiment may further be provided with a recessed slide rail, the slide rail extends transversely, and a slide rail that is matched with the slide rail to slide is disposed at a corresponding position of the sealing cover 322. The slide rail is of a concave structure, and correspondingly the slide way is of a convex structure. When the sealing cover 322 is pushed transversely, the slide way of the sealing cover 322 can move along the slide rail, so that the action reliability of the sealing cover 322 is improved. And the slide rail can be the sunk structure, avoids setting up the slide rail to produce the influence to the action of case axle 321.

The approximate range of diameters of the first through hole 312 and the second through hole 313 in each of the above embodiments may be 0.1mm to 3mm.

The first body 31 and the second body 32 herein may have a cylindrical shape, and the inner end of the second body 32 may be machined in a circular arc shape or a conical shape or other shapes.

In order to further improve the carrying comfort of male patients, it is preferable to completely place the catheter body 1 in the body, but since the catheter body 1 is too short to complete the installation of the catheter body 1, the urinary catheterization apparatus may be configured as follows.

Referring again to fig. 1, in the above embodiments, the ureter body 1 may comprise a first section 11 and a second section 12 along the length direction, wherein the first section 11 and the second section 12 are detachably connected. The positioning bag 2 is arranged at the upper end part of the first pipe section 11, and the switch valve 3 is arranged at the lower end part of the first pipe section 11. The branch also includes a first branch 11b and a second branch 12b, when the first pipe section 11 and the second pipe section 12 are in a connected state, the first branch 11b and the second branch 12b are butted, the inlet of the second branch 11b is filled with gas or liquid, and the gas or liquid enters the positioning bag 2 through the second branch 12b and the first branch 11 b. Of course, a check valve 4 for closing the lower end portion of the branch is also provided in the first branch 11b as shown in fig. 6.

In order to facilitate accurate and sealed butt joint of the first branch 11b and the second branch 12b, the upper end of the second branch 12b may be further provided with a protruding connection section, and the outer diameter of the connection section may be slightly smaller than the inner diameter of the lower end of the first branch 11 b.

Similarly, if other channels are provided on the urinary catheter body 1, the other channels can be set by referring to the above branch on the first and

second tube segments

11 and 12.

Before the ureter body 1 is installed in a patient, the first tube section 11 and the second tube section 12 are installed in a matching mode to form a whole, then the assembled first tube section 11 and the assembled second tube section 12 are inserted into the patient, so that the first tube section 11 is completely arranged in the patient, the second tube section 12 is partially arranged in the patient, and the lower end portion of the second tube section is exposed out of the patient. The positioning capsule 2 is filled with gas or liquid through a second branch 12b provided on the second tube section 12, so that the positioning capsule 2 is fixed at the urinary bladder urethral orifice.

After the positioning bag 2 is positioned with the urethral orifice of the bladder, the second tube section 12 is detached from the first tube section 11, so that the urethral catheterization device is completely built in the patient and cannot be seen from the outside. This greatly improves the comfort of the patient.

An embodiment for realising the detachability of the first 11 and second 12 pipe sections is given below.

In a specific embodiment, one of the opposite end surfaces of the first pipe segment 11 and the second pipe segment 12 is provided with a groove, the other one is provided with a protrusion which is matched and installed with the groove, a metal or magnetic component is arranged in the matching end part of the first pipe segment 11, an electromagnet is arranged on the second pipe segment 12, a lead 121 is further arranged in the second pipe segment 12, and the electromagnet is connected with an external power supply through the lead 121.

Fig. 1 shows a specific embodiment in which the lower end surface of the first pipe segment 11 is provided with a groove 11a, the groove 11a is internally provided with metal (not shown in fig. 1), the upper end surface of the second pipe segment 12 is provided with a protrusion 122, and the protrusion 122 part is provided with an electromagnet (not shown in fig. 1).

When the power supply is in a power-on state, the electromagnet in the second pipe section 12 has magnetism, attracts a metal or magnetic component in the first pipe section 11, and the first pipe section 11 and the second pipe section 12 are tightly combined together under the action of the magnetic force; when the power supply is off, the electromagnet in the second pipe segment 12 is magnetically deactivated and no longer attracts the metal in the first pipe segment 11, separating the first and

second pipe segments

11 and 12. Or the current direction of the electromagnet in the second pipe section 12 is changed, so that the electromagnet in the second pipe section 12 is opposite to the magnetic pole of the opposite end part of the magnetic part in the first pipe section 11, and the first pipe section 11 is separated from the second pipe section 12 under the action of homopolar repulsion.

Referring to fig. 5, fig. 5 is a top view of the switch valve 3 and the ureter body 1.

In the above embodiments, the switch valve 3 is integrally formed with the urinary catheter main body 1 through an injection molding process, and the switch valve 3 is circumferentially wrapped in the urinary catheter main body 1. Usually, the material of the urinary catheter main body 1 is preferably silica gel, i.e. after molding, the switch valve 3 is wrapped by the silica gel 34 in the circumferential direction.

The urethral catheterization apparatus provided by the present invention has been described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. A urethral catheterization device comprises a urethral catheter main body (1), wherein a positioning bag (2) is arranged on the periphery of the upper end part of the urethral catheter main body (1), and a branch communicated with the inner cavity of the positioning bag (2) is also arranged on the urethral catheter main body (1); the urine catheter is characterized in that the urine catheter main body (1) is further provided with a urine main pipe (1 a), the urine main pipe (1 a) comprises a urine inlet and a urine outlet, a switch valve (3) is further arranged between the urine inlet and the urine outlet and used for connecting or disconnecting the urine inlet and the urine outlet, and the switch valve (3) is close to the urine outlet; the switch valve (3) is positioned inside the main urine pipe (1 a) and is sealed circumferentially; the switch valve (3) comprises a first body (31) and a second body (32) which is transversely sealed in a sliding mode relative to the first body (31), a transversely extending elastic component (33) is further arranged between the first body (31) and the second body (32), when the second body (32) and the first body (31) are pressed to move transversely relatively to a preset position, an internal channel of the switch valve is conducted, and the elastic component (33) is compressed or stretched by the second body (32) in the moving process; the first body (31) is provided with a first passage for communicating the urine inlet and the urine outlet, the second body (32) is provided with a second passage (32 a), and the second body (32) closes the first passage in a normal state; when the second body (32) and the first body (31) are pressed to move transversely relatively to a preset position, the first channel is communicated through the second channel (32 a); the first body (31) is provided with a valve cavity (311) with an opening at one end, a first through hole (312) and a second through hole (313) which are communicated with the valve cavity (311) are formed in the peripheral wall of the first body (31), and the first through hole (312), the second through hole (313) and the valve cavity (311) form a first passage; the second body (32) is transversely arranged in the valve cavity (311) from the opening, and the peripheral wall of the second body (32) is circumferentially sealed with the inner peripheral wall of the valve cavity (311); under normal state, the second body (32) is partially exposed out of the opening, and the part positioned in the valve cavity (311) blocks the first through hole (312) or the second through hole (313); the second body (32) comprises a valve core shaft (321) and a sealing cover (322), and the valve core shaft and the sealing cover are transversely and slidably arranged in the valve cavity (311); the valve core shaft (321) is sealed with the valve cavity (311) in the circumferential direction; the elastic member (33) includes a first elastic member (331) and a second elastic member (332); the first elastic component (331) is arranged between the inner end part of the valve core shaft (321) and the inner wall of the valve cavity (311), and the second channel (32 a) is arranged in the valve core shaft (321); the second elastic component (332) is arranged between the sealing cover (322) and the inner wall of the valve cavity (311), in a normal state, part of the valve core shaft (321) is exposed outside the valve cavity (311), and the sealing cover (322) covers the first through hole (312) or the second through hole (313).

2. The urinary catheterization device of claim 1, characterized in that the inner wall of the valve cavity (311) is further provided with a recessed slide rail extending transversely, and the corresponding position of the sealing cover (322) is provided with a slide rail matched with the slide rail for sliding.

3. The urinary catheterization device of claim 1, characterized in that the material of the switch valve (3) is rigid plastic or soft silicone.

4. The urinary catheter according to any one of claims 1 to 3, characterized in that the on-off valve (3) is integrally formed with the urinary catheter body (1) by an injection molding process, and the on-off valve (3) is circumferentially wrapped in the urinary catheter body (1).

5. The urinary catheter according to any one of claims 1 to 3, wherein the urinary catheter main body (1) comprises a first tube segment (11) and a second tube segment (12) which are detachably connected in the length direction, the positioning bag (2) is arranged at the upper end of the first tube segment (11), and the on-off valve (3) is arranged at the lower end of the first tube segment (11); the branch comprises a first branch (11 b) and a second branch (12 b) which are communicated with each other and are respectively arranged on the first pipe section (11) and the second pipe section (12); the lower end part of the first branch (11 b) is provided with a one-way valve (4).

6. The urinary catheterization device of claim 5, characterized in that the opposite end surfaces of the first pipe section (11) and the second pipe section (12) are provided with a groove on one of them and a protrusion fitted with the groove on the other, the fitting end of the first pipe section (11) is provided with a metal or magnetic component inside, the second pipe section (12) is provided with an electromagnet, the second pipe section (12) is further provided with a lead wire (121) inside, and the electromagnet is connected with an external power supply through the lead wire (121).