Multifunctional catheter

Abstract

The invention relates to a multifunctional catheter, and belongs to the technical field of medical instruments. The multifunctional catheter comprises a three-cavity catheter and a round tube for the guide wire to pass through. The first end of the three-cavity catheter comprises a flushing pipe and a backflow pipe, and the second end of the three-cavity catheter is provided with a through hole which allows the guide wire to pass through and is smaller than the iron wire in diameter. Through cooperation of the round tube and the iron wire, one end of the iron wire is inserted into the round tube, and the inner wall of the round tube rubs the outer wall of the limiting iron wire, so that the iron wire is prevented from making contact with the urethra in the guiding process, and the effect of protecting the urethra safety is achieved; the three-cavity catheter can be guided into the bladder along the guide wire like a string of beads without replacing the catheter, so that the catheter is safely and accurately retained in the bladder, the problem that the catheter curled in the urethra cannot be placed into the bladder is solved, and the applicability of the catheter is improved.

Description

Technical Field

[0001] The invention relates to the field of medical appliances, in particular to a multifunctional urinary catheter. Background Art

[0002] The head area of ​​the existing three-chamber urinary catheter includes a tube wall, the inner side of the tube wall is a drainage cavity, and the head of the drainage cavity is in the same direction as the head of the tube wall. A flushing hole is provided above the tube wall of the head of the three-chamber urinary catheter; the flushing hole is used for the injection of external medicine or flushing water; side holes are provided on both sides of the head of the three-chamber urinary catheter, and the side holes are connected to the drainage cavity, and the side holes are used to return the liquid in the bladder to the discharge port of the three-chamber urinary catheter and discharge it. In the process of inserting a catheter into a patient, the head of the catheter needs to be inserted into the urethra first. However, there may be urethral obstruction caused by various reasons, making it impossible to insert the catheter smoothly. In order to facilitate the retention of the catheter, when performing the catheter retention operation, an iron wire can be passed through the discharge port and inserted into the drainage cavity head of the catheter to guide the insertion of the catheter into the urethra.

[0003] Catheterization under wire guidance is important and necessary. It can be routinely performed in the ward. It can be performed directly without the need for equipment such as transurethral resectoscopes. It is a cost-effective and high-priority operation before using guidewires and a series of complex equipment for catheterization. Guidewires are generally used under anesthesia in conjunction with transurethral resectoscopes during surgery, and require two people to work together. The cost of use is higher than that of wires, and the process is cumbersome. Therefore, catheterization under guidewire guidance is generally used when wire-guided catheterization is not smooth or is performed directly under anesthesia with a resectoscope after transurethral surgery. The advantage is that the guidewire is visualized under the microscope when it is inserted, which is safer and more accurate. Therefore, the current three-lumen catheter selects one of the guidewire or wire for operation according to the specific conditions such as the operating environment and operation priority.

[0004] However, the existing device has the following problems: when performing the catheter placement operation, if a difficult urethra is encountered, a conventional catheter is difficult to insert. At this time, a guide wire needs to be inserted into the drainage cavity of the catheter to play a supporting and guiding role; the wire is inserted into the catheter, and the front end of the wire is used to support the head of the catheter flushing cavity to push the catheter forward. However, the existing wire operation is a blind push. When encountering a bending path, the wire will randomly deviate when moving inside the catheter. At this time, the wire may bend, and the outer wall of the wire rubs against the inner wall of the urethra through the side hole, causing part of the wire to run out of the catheter drainage cavity through the side hole. The wire may pass through the side holes on both sides of the front end of the catheter, thereby damaging the urethral mucosa; and when performing the catheter placement operation during the operation, the catheter used by the wire is not suitable for the guide wire. At this time, the catheter dedicated to the guide wire needs to be replaced. When replacing, it needs to be additionally transferred from the warehouse and disinfected before use. The steps are cumbersome and not conducive to operation. Summary of the invention

[0005] Based on this, it is necessary to provide a multifunctional urinary catheter to address the technical problems that when the existing three-lumen urinary catheter is guided by an iron wire, the iron wire has an extremely high risk of damaging the urethral mucosa and the existing urinary catheter has low applicability.

[0006] The present invention provides a multifunctional urinary catheter, which is used to selectively operate a guide wire or an iron wire; the multifunctional urinary catheter comprises a three-lumen urinary catheter and a round tube for the guide wire to pass through. The first end of the three-lumen urinary catheter comprises a flushing tube and a reflux tube, and the second end of the three-lumen urinary catheter is provided with a through hole for the guide wire to pass through and having a diameter smaller than the diameter of the iron wire. The round tube is installed in the three-lumen urinary catheter, the first end of the round tube is communicated with the through hole, and the second end of the round tube is used to access the iron wire that passes through the reflux tube and enters the inside of the three-lumen urinary catheter.

[0007] In one embodiment, the round tube is integrally formed on the inner wall of the second end of the triple-lumen urinary catheter.

[0008] In one embodiment, scales are provided on opposite sides of the outer wall of the triple-lumen urinary catheter, and the zero mark of the scales is located at the airbag of the triple-lumen urinary catheter.

[0009] In one embodiment, the graduation value of the scale is 0.1 to 0.5 cm.

[0010] In one embodiment, the maximum axial extension point of the second end of the triple-lumen urinary catheter deviates from the axis of the triple-lumen urinary catheter.

[0011] In one embodiment, side holes are opened on both sides of the triple-lumen urinary catheter, and the circular tube covers the projection of the side holes on the axis of the triple-lumen urinary catheter.

[0012] In one embodiment, a switch is provided at the tube mouth of the cleaning tube, and the switch includes a shell structure for connecting the cleaning tube of the three-lumen urinary catheter with an external syringe, a blocking structure for closing the shell structure, and a self-locking structure for limiting the blocking structure.

[0013] In one embodiment, the shell structure includes a shell, an outer hole plate and an inner hole plate, both of which are disc-shaped and have circular holes at the axis of the outer hole plate and the inner hole plate, the shell is a cylindrical container with openings on the top and side walls, the opening of the side wall of the shell is sealed and connected to the interface of the cleaning pipe of the three-lumen urinary catheter, the outer hole plate and the inner hole plate are installed in the opening of the shell with interval sealing and form a sealed chamber with the inner wall of the shell, and the connection between the side wall of the shell and the cleaning pipe opening of the three-lumen urinary catheter is located between the outer hole plate and the inner hole plate.

[0014] In one embodiment, the sealing structure includes a slide rail, a slider, a round rod and a push rod. The round rod is used for sealing and plugging with the round hole. The slide rail is fixed to the inner wall of the shell. The slider slides at the upper limit of the slide rail. One end of the round rod is fixed to the top of the slider along the axis direction of the shell, and the push rod is connected to the round rod.

[0015] In one embodiment, the self-locking structure includes a U-shaped groove, a rotating ring and a spring. The U-shaped groove is opened on the outer wall of the outer shell, the rotating ring is rotatably connected to the outer wall of the round rod, the bottom end of the push rod is fixed to the outer wall of the rotating ring, the top end of the push rod is located in the U-shaped groove, and the spring is fixed between the bottom of the outer shell and one end of the round rod.

[0016] The multifunctional urinary catheter provided by the present invention has the following beneficial effects:

[0017] 1. When conventional catheterization is not smooth, one end of the iron wire can be inserted into the round tube through the cooperation of the round tube and the iron wire, so that the inner wall of the round tube rubs the outer wall of the limiting iron wire. In this way, when the iron wire is used to guide the catheter, even if a bending path is encountered, the iron wire will be subject to friction resistance when it has a tendency to break free under the friction and containment of the round tube, and will not easily deviate and run out of the catheter, thereby avoiding the contact between the iron wire and the urethra during the guidance process, achieving the effect of protecting the safety of the urethra, and solving the technical problem that when the existing three-chamber catheter is guided by the iron wire, the iron wire has a very high risk of damaging the urethral mucosa.

[0018] 2. A through hole is provided at the closed end of the pipe, and the through hole is used to connect the pipe to the external guide wire. During surgery or when the patient's urethra is complicated and wire guidance is not smooth, a transurethral resection scope combined with guide wire traction is generally used. First, the guide wire with a soft head is inserted into the bladder under the guidance of the resection scope, and then the resection scope is pulled out to retain the guide wire, and the three-lumen urinary catheter is inserted into the bladder along the guide wire. Since the inner side of the through hole is connected to the one end of the circular tube, the three-lumen urinary catheter can be inserted into the bladder along the guide wire like a string of beads, thereby safely and accurately retaining the catheter in the bladder, solving the problem of the catheter curling up in the urethra and failing to be inserted into the bladder. In addition, it is used in combination with a transurethral resection scope during surgery, which has the advantage of visualization on the basis of wire-guided catheterization operation and is relatively safe.

[0019] 3. By moving the push rod to the outer depression of the U-shaped groove and engaging it, the outer hole plate and the flushing tube opening of the three-lumen urinary catheter can be sealed. By moving the push rod to the inner depression of the U-shaped groove and engaging it, the round rod can be driven to move to the through hole at the center of the inner hole plate, connecting the outer hole plate with the flushing tube opening of the three-lumen urinary catheter, thereby achieving the effect of easily controlling the opening and closing of the flushing tube and blocking the external space to achieve the anti-pollution effect.

[0020] 4. By setting up a multifunctional urinary catheter, the guide wire or iron wire can be operated progressively on the same urinary catheter. The iron wire is used first. If the iron wire cannot achieve the function of catheter insertion, the iron wire is replaced with the guide wire, and the guide wire is used to place the urinary catheter. During this switching process, there is no need to replace the catheter dedicated to the guide wire, nor is it necessary to transfer it from the warehouse and disinfect it. It can be used directly. The steps are simple and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a preferred embodiment of the present invention;

[0022] Figure 2 for Figure 1 A section of the structure in the middle is an enlarged view;

[0023] Figure 3 for Figure 2 Schematic diagram of the inclined structure of the middle three-lumen urinary catheter;

[0024] Figure 4 for Figure 1 A schematic diagram of the structure of a three-lumen urinary catheter with scale added in the middle;

[0025] Figure 5 for Figure 4 A schematic diagram of the structure of a three-lumen urinary catheter with a switch added thereto;

[0026] Figure 6 for Figure 5 Schematic diagram of the switch structure Figure 1 ;

[0027] Figure 7 for Figure 5 Schematic diagram of the switch structure Figure 2 ;

[0028] Figure 8 for Figure 5 Schematic diagram of the switch structure Figure 3 ;

[0029] Fig. 9 for Figure 6 Schematic diagram of the half-section structure of the middle switch.

[0030] Reference numerals:

[0031] 1. Three-lumen urinary catheter; 11. Side hole; 12. Through hole; 13. Flushing hole; 2. Scale; 3. Round tube; 4. Iron wire; 6. Switch; 61. Shell structure; 611. Shell; 612. Outer hole plate; 613. Inner hole plate; 62. Blocking structure; 621. Slide rail; 622. Sliding block; 623. Round rod; 624. Push rod; 7. Self-locking structure; 71. U-shaped groove; 72. Rotating ring; 73. Spring. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0035] See also Figures 1 to 9 The present invention provides a multifunctional urinary catheter, which is used to operate on either a guide wire or an iron wire 4.

[0036] Among them, the guide wire is a tool commonly used in medical surgery to guide tubular objects into the human body. Its front end is soft and will not hurt the human body, so it is often used in surgery. When performing surgery or the patient's urethra is complicated and the wire guidance is not smooth, a transurethral resection mirror combined with a guide wire traction method is generally used. First, the soft guide wire with the head is placed into the bladder under the guidance of the resection mirror, and then the resection mirror is pulled out to retain the guide wire, and the three-chamber urinary catheter is placed into the bladder along the guide wire. It is used in combination with a transurethral resection mirror during surgery. It has the advantage of visualization on the basis of the wire-guided catheterization operation, and is relatively cost-effective. When in use, first insert the guide wire into the bladder through the sheath tool, and then pull out the sheath to retain the guide wire. At this time, the front end of the guide wire is located in the bladder urethra, and the end of the guide wire extends to the outside of the human body. Pass the end of the guide wire through the through hole 12 of the three-chamber urinary catheter 1, and then push the three-chamber urinary catheter 1 to achieve the retention of the three-chamber urinary catheter 1 in the urinary bladder.

[0037] In addition, the iron wire 4 is a tool commonly used in daily wards to guide the placement of a urinary catheter. One end of the iron wire 4 is passed through the reflux tube into the interior of the three-lumen urinary catheter 1, and one end of the iron wire 4 is pressed against the second end of the three-lumen urinary catheter 1 to enable the iron wire to push the urinary catheter into the urethra, thereby achieving the placement operation.

[0038] By setting up a multifunctional urinary catheter, the guide wire or the iron wire 4 can be operated progressively on the same urinary catheter. The iron wire is used first. If the iron wire cannot achieve the function of inserting the urinary catheter, the iron wire is replaced with the guide wire, and the urinary catheter is placed using the guide wire. During this switching process, there is no need to replace the urinary catheter dedicated to the guide wire, nor is it necessary to additionally call it out from the warehouse and disinfect it. It can be used directly. The steps are simple and easy to operate, which improves the applicability of the urinary catheter.

[0039] The multifunctional urinary catheter comprises a three-lumen urinary catheter 1 and a round tube 3 for a guide wire to pass through. The first end of the three-lumen urinary catheter 1 comprises a flushing tube and a reflux tube. The second end of the three-lumen urinary catheter 1 is provided with a through hole 12 for the guide wire to pass through and having a diameter smaller than that of the iron wire 4. The round tube 3 is installed in the three-lumen urinary catheter 1, the first end of the round tube 3 is connected to the through hole 12, and the second end of the round tube 3 is used to access the iron wire 4 that enters the inside of the three-lumen urinary catheter 1 through the reflux tube. Usually, a flushing port 13 is also provided on the outer wall of the three-lumen urinary catheter 1, and the flushing port 13 is connected to the flushing tube through a channel provided in the wall of the three-lumen urinary catheter 1. By injecting liquid medicine into the flushing tube, the liquid medicine will reach the flushing port 13 through the channel provided in the wall of the three-lumen urinary catheter 1, and will flow out through the flushing port 13 and enter the bladder, and then will flow back through the side hole 11, and finally the flushed water will flow out from the reflux tube to realize the flushing cycle.

[0040] A round tube 3 is also installed in the axial direction of the three-lumen urinary catheter 1. The round tube 3 is used to accommodate the external iron wire 4. One end of the iron wire 4 is inserted into the three-lumen urinary catheter 1 from the reflux pipe port and enters the inside of the three-lumen urinary catheter 1. Through artificial calibration, one end of the iron wire 4 is inserted into the round tube 3, and the inner wall of the round tube 3 and the iron wire 4 are rubbed. The iron wire 4 is limited and fixed by the friction force of the inner wall of the round tube 3. In this way, in the subsequent guiding process, even if the iron wire is bent, its front end will be limited by the friction force of the round tube 3. The iron wire 4 is allowed to stably deliver the three-lumen urinary catheter 1 into the human body. After the guiding operation is completed, the three-lumen urinary catheter 1 is retained in the bladder through the air bag. The iron wire 4 can be directly pulled out to achieve the installation operation. The device is simple to operate and solves the problem of unsafe use of existing devices.

[0041] A through hole 12 is provided at the second end of the three-lumen urinary catheter, through which a guide wire can pass. Thus, when guiding the three-lumen urinary catheter 1, the guide wire can be directly passed through the through hole 12, and the end of the guide wire can be moved along the three-lumen urinary catheter 1 and run out of the reflux tube. Then, the end of the guide wire is pinched, and the urinary catheter is pushed to be pushed into the patient's body. Since the guide wire is softer than iron wire, the method will not cause harm to the patient when used during surgery, and has better safety, thereby solving the problem of unsafe use of existing devices.

[0042] In some embodiments, the round tube 3 may be integrally formed on the inner wall of the second end of the triple-lumen urinary catheter 1 , thereby reducing the time spent on the production of the product.

[0043] In some embodiments, the three-lumen urinary catheter 1 has side holes 11 on both sides, and the round tube 3 covers the projection of the side holes 11 on the axis of the three-lumen urinary catheter 1. In this way, even if the wire 4 deviates, it will not contact the side holes 11, and will not run out of the side holes 11 to cause damage to the urethra.

[0044] See also Figure 3 In some embodiments, the maximum axial extension position of the second end of the triple-lumen urinary catheter 1 deviates from the axis of the triple-lumen urinary catheter. Such a structure is conducive to inserting the triple-lumen urinary catheter 1 from the urethra.

[0045] See also Figure 4 In some embodiments, scales 2 are provided on opposite sides of the outer wall of the three-lumen urinary catheter 1, and the zero scale line of the scale 2 is located at the air bag of the three-lumen urinary catheter 1. And the graduation value of the scale 2 is 0.1 to 0.5 cm. By observing the scale 2, the insertion depth of the urinary catheter can be clearly seen, which is convenient for subsequent observation. And because the scale 2 is provided on both sides of the three-lumen urinary catheter 1, it will not appear that the scale cannot be seen and the three-lumen urinary catheter 1 needs to be rotated for observation, which can avoid secondary damage caused by rotating the three-lumen urinary catheter 1.

[0046] See also Figures 5 to 9 In some embodiments, a switch 6 is provided at the tube mouth of the cleaning tube, and the switch 6 includes a shell structure 61 for connecting the cleaning tube of the three-lumen urinary catheter 1 with an external syringe, a blocking structure 62 for closing the shell structure 61, and a self-locking structure 7 for limiting the blocking structure 62.

[0047] In some embodiments, the shell structure 61 includes a shell 611, an outer hole sheet 612 and an inner hole sheet 613. The outer hole sheet 612 and the inner hole sheet 613 are both disc-shaped and have circular holes at the axis of the outer hole sheet 612 and the inner hole sheet 613. The shell 611 is a cylindrical container with openings on the top and side walls. The opening of the side wall of the shell 611 is sealed and connected to the interface of the cleaning pipe of the three-lumen urinary catheter 1. The outer hole sheet 612 and the inner hole sheet 613 are installed in the opening of the shell 611 with interval sealing and form a sealed chamber with the inner wall of the shell 611, and the connection between the side wall of the shell 611 and the cleaning pipe opening of the three-lumen urinary catheter 1 is located between the outer hole sheet 612 and the inner hole sheet 613.

[0048] In some embodiments, the outer hole plate 612 and the inner hole plate 613 are both circular, and the outer hole plate 612 and the inner hole plate 613 are installed on the inner wall of the outer shell 611 to achieve a blocking effect. The outer contours of the outer hole plate 612 and the inner hole plate 613 are sealed and fixed to the inner wall of the outer shell 611, and the outer hole plate 612 and the inner hole plate 613 are installed in sequence at a distance apart from each other in the axial direction of the inner wall of the outer shell 611, so that a chamber is formed between the outer hole plate 612 and the inner hole plate 613, and the opening of the side wall of the outer shell 611 connected to the flushing tube port of the three-lumen urinary catheter 1 is located in the chamber formed by the outer hole plate 612 and the inner hole plate 613. In this way, it is only necessary to block the circular hole of the inner hole plate 613 to form a passage through the circular hole of the outer hole plate 612 and the opening connected to the flushing tube port of the three-lumen urinary catheter 1. Thus, the liquid medicine is transported. When not in use, the circular holes of the outer hole sheet 612 and the inner hole sheet 613 are blocked, so that the flushing tube opening of the three-lumen urinary catheter 1 can be completely sealed, thereby achieving the effect of sealing.

[0049] In some embodiments, the sealing structure 62 includes a slide rail 621, a slider 622, a round rod 623 and a push rod 624. The round rod 623 is used for sealing and plugging with the round hole. The slide rail 621 is fixed on the inner wall of the outer shell 611. The slider 622 slides on the upper limit of the slide rail 621. One end of the round rod 623 is fixed on the top of the slider 622 along the axial direction of the outer shell 611, and the push rod 624 is connected to the round rod 623.

[0050] In some embodiments, by pushing the push rod 624 to drive the round rod 623 to move to the upper limit of the slide rail 621, one end of the round rod 623 passes through the circular holes at the center of the outer hole plate 612 and the inner hole plate 613 and blocks them, so that sealing can be achieved. By moving the round rod 623 to the circular hole of the inner hole plate 613 and blocking it, a passage can be formed at the opening where the circular hole of the outer hole plate 612 is connected to the flushing tube port of the three-lumen catheter 1.

[0051] In some embodiments, the self-locking structure 7 includes a U-shaped groove 71, a rotating ring 72 and a spring 73. The U-shaped groove 71 is opened on the outer wall of the outer shell 611, the rotating ring 72 is rotatably connected to the outer wall of the round rod 623, the bottom end of the push rod 624 is fixed to the outer wall of the rotating ring 72, the top end of the push rod 624 is located in the U-shaped groove 71, and the spring 73 is fixed between the bottom of the outer shell 611 and one end of the round rod 623.

[0052] In some embodiments, the rotating ring 72 allows the push rod 624 to rotate without causing relative displacement with the round rod 623, pushing the push rod 624 to move and rotate in the U-shaped groove 71, driving the round rod 623 to move while allowing the top of the push rod 624 to engage with the recessed part of the U-shaped groove 71, and pushing the round rod 623 outward through the spring 73, so that the round rod 623 can be engaged at the two positions of the outer hole plate 612 and the inner hole plate 613. The push rod 624 moves to the outer recessed part of the U-shaped groove 71 to engage, and it can be sealed. The push rod 624 moves to the inner recessed part of the U-shaped groove 71 to engage, and it can drive the round rod 623 to move to the through hole at the center of the inner hole plate 613, connecting the outer hole plate 612 with the flushing tube opening of the three-chamber urinary catheter 1, thereby achieving the effect of easily controlling the opening and closing of the flushing tube.

[0053] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A multifunctional urinary catheter, used for operating a guide wire or an iron wire (4); the multifunctional urinary catheter comprises a three-lumen urinary catheter (1), the first end of the three-lumen urinary catheter (1) comprises a flushing tube and a return tube, characterized in that: The second end of the three-lumen urinary catheter (1) is provided with a through hole (12) for the guide wire to pass through and having a diameter smaller than the diameter of the iron wire (4). The multifunctional urinary catheter also includes a round tube (3) for the guide wire to pass through. The round tube (3) is installed in the three-lumen urinary catheter (1). The first end of the round tube (3) is in communication with the through hole (12), and the second end of the round tube (3) is used to connect the iron wire (4) that enters the interior of the three-lumen urinary catheter (1) through the reflux pipe.

2. The multifunctional urinary catheter according to claim 1, characterized in that: The round tube (3) is integrally formed on the inner wall of the second end of the three-lumen urinary catheter (1).

3. The multifunctional urinary catheter according to claim 1, characterized in that: Scales (2) are provided on opposite sides of the outer wall of the three-lumen urinary catheter (1), and the zero scale line of the scale (2) is located at the air bag of the three-lumen urinary catheter (1).

4. The multifunctional urinary catheter according to claim 3, characterized in that: The graduations of the scale (2) are from 0.1 to 0.5 cm.

5. The multifunctional urinary catheter according to claim 1, characterized in that: The maximum axial extension position point of the second end of the triple-lumen urinary catheter (1) deviates from the axis of the triple-lumen urinary catheter.

6. The multifunctional urinary catheter according to claim 1, characterized in that: The three-lumen urinary catheter (1) has side holes (11) on both sides, and the circular tube (3) covers the projection of the side holes (11) on the axis of the three-lumen urinary catheter (1).

7. The multifunctional urinary catheter according to claim 1, characterized in that: A switch (6) is provided at the mouth of the cleaning tube, and the switch (6) comprises a shell structure (61) for connecting the cleaning tube of the three-lumen urinary catheter (1) with an external syringe, a blocking structure (62) for closing the shell structure (61), and a self-locking structure (7) for limiting the blocking structure (62).

8. The multifunctional urinary catheter according to claim 7, characterized in that: The outer shell structure (61) comprises an outer shell (611), an outer hole sheet (612) and an inner hole sheet (613); the outer hole sheet (612) and the inner hole sheet (613) are both disc-shaped and have circular holes at the axis of the outer hole sheet (612) and the inner hole sheet (613); the outer shell (611) is a cylindrical container with openings on the top and side walls; the opening of the side wall of the outer shell (611) is sealed and connected to the cleaning pipe interface of the three-lumen urinary catheter (1); the outer hole sheet (612) and the inner hole sheet (613) are installed in the opening of the outer shell (611) in a sealed manner and form a sealed chamber with the inner wall of the outer shell (611); and the connection between the side wall of the outer shell (611) and the cleaning pipe opening of the three-lumen urinary catheter (1) is located between the outer hole sheet (612) and the inner hole sheet (613).

9. The multifunctional urinary catheter according to claim 8, characterized in that: The blocking structure (62) comprises a slide rail (621), a slider (622), a round rod (623) and a push rod (624); the round rod (623) is used for sealing and plugging with the round hole; the slide rail (621) is fixed to the inner wall of the housing (611); the slider (622) slides within the upper limit position on the slide rail (621); one end of the round rod (623) is fixed to the top of the slider (622) along the axial direction of the housing (611); and the push rod (624) is connected to the round rod (623).

10. The multifunctional urinary catheter according to claim 9, characterized in that: The self-locking structure (7) comprises a U-shaped groove (71), a rotating ring (72) and a spring (73); the U-shaped groove (71) is provided on the outer wall of the housing (611); the rotating ring (72) is rotatably connected to the outer wall of the round rod (623); the bottom end of the push rod (624) is fixed to the outer wall of the rotating ring (72); the top end of the push rod (624) is located in the U-shaped groove (71); and the spring (73) is fixed between the bottom of the housing (611) and one end of the round rod (623).

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