Multifunctional catheter suite and use method

Abstract

The invention relates to the technical field of catheter suites, and discloses a multifunctional catheter suite and a using method thereof. The filling unit comprises an air bag and a water injection pipe which are arranged on the catheter, and the air bag is of a conical structure. Basically, all transurethral prostatic hyperplasia operation modes need to retain catheterization, the catheter air bag is pulled to the bladder neck opening, the conical air bag can press the bladder neck opening in a wedging mode after being expanded, the catheter is pulled and fixed in combination with the fixing unit, prostatic wound bleeding is effectively blocked, and bladder blood clot filling is prevented. And aiming at difficult urethral catheterization and urethral stricture possibly occurring in a prostate operation, the guide wire dilation strip and the catheter with the front end opened can successfully complete difficult urethral catheterization and safe urethral dilation. The expansion strip adopts a bionic morphological design that the first expansion section is arc-shaped and the second expansion section is bent, and is combined with a diameter gradual change structure from thin to thick, so that progressive physical expansion is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of urinary catheter kits, and more particularly to a multifunctional urinary catheter kit and a use method thereof. Background Art

[0002] During surgery for benign prostatic hyperplasia (BPH), after the enlarged prostate tissue is removed, the stumps of blood vessels within the mucosa and smooth muscle layer at the base of the prostate and bladder neck are prone to bleeding, especially arterial bleeding, which can be severe. To control bleeding from the surgical wound after surgery, the surgeon inserts a balloon catheter through the urethra and inflates the balloon with saline. Pulling the catheter causes the balloon to press against the bladder neck. The inflated balloon exerts continuous, even pressure on the tissues surrounding the bladder neck and the prostate wound, effectively stopping the bleeding.

[0003] However, during the process of compressing the prostate fossa to stop bleeding, the prostate as a whole presents an inverted conical cavity that is wide at the top and narrow at the bottom, while the traditional air balloon has a spherical structure, which often leads to insufficient compression of the bladder neck or excessive pressure on the bladder trigone, thereby causing continuous bleeding and intractable bladder irritation, thereby affecting the patient's postoperative recovery and even requiring another surgery to stop bleeding.

[0004] Secondly, after prostatectomy for benign prostatic hyperplasia (BPH), the urethral morphology in the prostate area is completely altered, making catheterization difficult for some patients. Furthermore, chronic frictional damage caused by long-term indwelling of a thick catheter or repeated intraurethral manipulation can induce excessive scarring. Chronic inflammatory reactions caused by prolonged postoperative infection, urine reflux, or chemical irritation can accelerate abnormal collagen fiber deposition, leading to urethral stricture, obstructed urine flow, and adversely affecting normal urination function. Currently, urethral dilation is a relatively simple and commonly used treatment for urethral strictures. Traditional urethral dilators used in urethral dilation procedures consist of a series of metal dilators of varying thicknesses. However, during urethral dilation, the surgeon relies solely on their own experience and feel for insertion. When encountering severe urethral strictures and high resistance, the surgeon is often hesitant to forcefully insert the dilator. Forced insertion can create a false passage or even perforate abdominal organs, creating a high risk procedure and potentially leading to serious complications. Summary of the Invention

[0005] The present invention provides a multifunctional urinary catheter kit and a method for use, which solve the technical problems in the related art that the traditional spherical balloon becomes a symmetrical ellipsoid after expansion, which is difficult to achieve precise fit with the bladder neck, and at the same time aggravates bladder irritation symptoms, affecting the patient's postoperative recovery; and when encountering a situation where the degree of urethral stenosis is relatively severe and the resistance is large, the surgeon often dares not to insert the dilator with force rashly. If forced insertion is carried out, it is very likely to cause the formation of a false passage, which has a high operational risk and is prone to causing serious complications; and the technical problem that the urethral morphology changes after prostate surgery, making catheterization difficult.

[0006] On one hand, the present invention discloses a multifunctional urinary catheter kit, comprising a urinary catheter, wherein the insertion end of the urinary catheter is provided with an opening; a filling unit, wherein the filling unit comprises an air bag and a water injection pipe arranged on the urinary catheter, wherein the air bag is close to the opening position and is arranged in a conical structure, and the water injection pipe is arranged at a position away from the opening, and a water flow channel is provided between the air bag and the water injection pipe, and the water flow channel is opened inside the urinary catheter.

[0007] As a further optimization solution of the present invention, the length and width of the airbag when deployed are both 3.8 cm.

[0008] As a further optimization scheme of the present invention, a fixing unit is also provided on the catheter, and the fixing unit includes arc-shaped caps arranged on both sides of the catheter, and a plastic film is provided between the arc-shaped caps. The arc-shaped caps and the plastic film are fixedly connected, and the sides of the arc-shaped caps away from each other are both provided with adhesive tapes.

[0009] As a further optimization scheme of the present invention, a through hole for the catheter to pass through is provided between the two groups of the arc-shaped caps, and a first clip and a second clip are provided at the through hole. The two groups of the arc-shaped caps are fixedly connected to the first clip and the second clip respectively. A shaft rod is installed inside the first clip, and the shaft rod is rotatably connected to the second clip. A torsion spring is provided on the shaft rod, and the two ends of the torsion spring are fixedly connected to the first clip and the second clip respectively. Multiple groups of rubber pads are provided on the inner wall of the second clip.

[0010] As a further optimization solution of the present invention, a guide wire is also included. The urinary catheter can pass outside the guide wire. A miniature camera can be installed on the insertion end of the guide wire to observe the inside of the urethra and realize visual guidance.

[0011] As a further optimization scheme of the present invention, it also includes an expansion strip, which can pass through the outside of the guide wire. The expansion strip includes a first expansion segment and a second expansion segment. The first expansion segment is arranged in an arc shape, and the second expansion segment is arranged in a curved shape; a first node is arranged at the end of the first expansion segment away from the second expansion segment, a second node is arranged between the first expansion segment and the second expansion segment, and a third node is arranged at the end of the second expansion segment away from the first expansion segment; the diameter of the second expansion segment gradually increases from the third node to the second node.

[0012] As a further optimization solution of the present invention, the outer diameters of the first node and the second node are 6 mm, and the outer diameter of the third node is 2 mm.

[0013] As a further optimization solution of the present invention, the first expansion section and the second expansion section are integrally formed, and the length of the second expansion section is 10 cm.

[0014] As a further optimization solution of the present invention, a cavity is provided inside the first expansion section and the second expansion section, and the guide wire can pass through the cavity.

[0015] Another aspect of the present invention discloses a method for using a multifunctional urinary catheter kit, comprising the following steps: S1. During BPH surgery, a urinary catheter is inserted into the urethra and into the bladder; S2. Water is injected into the water injection tube to inflate the balloon, pulling the catheter outward and directly wedge-type compressing the bladder neck. This mechanical pressure blocks the flow of blood from ruptured blood vessels in the prostate or urethra surgical wound into the bladder, thus compressing and stopping bleeding. S3. After the balloon is inflated, the catheter is pulled outward, and the fixing unit fixes the catheter to maintain the pulled state of the catheter, so that the balloon fits tightly against the bladder neck, preventing blood from the prostate or urethral wound from entering the bladder and forming bladder blood clots; S4. After recovery from BPH surgery, if urethral stenosis, obstructed urinary flow, or other catheterization difficulties occur, insert the front end of the guidewire through the urethral opening, repeatedly test, and slowly insert it into the bladder; S5. Use a dilator. Pass the tip of the dilator through the guidewire and push it along the guidewire to gradually dilate the narrow urethra. The dilator is soft and not easy to break, so it can coil inside the bladder. S6. When the patient needs catheterization, the expansion strip can be slowly withdrawn, leaving the guide wire in the urethra, and a urinary catheter with an opening at the front end can be inserted along the guide wire for indwelling catheterization.

[0016] The beneficial effect of the present invention is that in prostate hyperplasia surgery, basically all transurethral prostate hyperplasia surgical methods require catheterization. In order to stop bleeding in the prostate fossa during catheterization, the present invention pulls the catheter balloon to the bladder neck. After the conical balloon is expanded, it can tightly compress the bladder neck, forming a wedge-type compression, thereby improving the hemostasis efficiency. In addition, the catheter is pulled and fixed in combination with a fixing unit, which can effectively block bleeding from the prostate wound and prevent bladder blood clots from being accumulated. At the same time, the patient can be catheterized, creating good conditions for the healing of the surgical wound.

[0017] Furthermore, the guidewire expansion strip and front-end opening catheter of the present invention can successfully complete difficult catheterization and safe urethral dilation for the difficult catheterization and urethral stenosis that may occur due to prostate surgery. Among them, the expansion strip of the present invention adopts a bionic morphological design with an arc-shaped first expansion section and a curved second expansion section, combined with a diameter gradient structure from thin to thick, to achieve progressive physical expansion. After the first expansion section enters the bladder, the curved portion automatically restores its shape, forming physical feedback, prompting the operator to accurately expand the channel. This not only avoids the risk of urethral mucosal tearing caused by sudden pressure caused by traditional dilators, but also reduces the incidence of bladder spasm by reducing the rigid stimulation of the bladder wall. Through the orderly coordination of the guidewire, expansion strip and catheter, step-by-step expansion and catheterization are integrated. First, the guidewire is used to construct the guide channel, and then the expansion strip is used to gradually expand the urethra along the guidewire. Finally, the catheter is inserted along the guidewire to complete the indwelling catheterization. The entire process does not require repeated replacement of the expansion strip, reducing the patient's pain and infection risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the urinary catheter and guidewire of the present invention in use; Figure 2 This is a schematic diagram of the expansion strip and guide wire of the present invention in use; Figure 3 It is a schematic diagram of the three-dimensional structure of the expansion strip of the present invention; Figure 4 It is a schematic diagram of the planar structure of the expansion strip of the present invention; Figure 5 It is a schematic cross-sectional view of the urinary catheter, guide wire and air bag of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the fixing unit of the present invention; Figure 7 It is a schematic diagram of the partially exploded three-dimensional structure of the fixing unit of the present invention.

[0019] In the figure: 1. Catheter; 2. Guide wire; 3. Expansion strip; 31. First expansion section; 32. Second expansion section; 33. First node; 34. Second node; 35. Third node; 4. Filling unit; 41. Air bag; 42. Water injection pipe; 43. Water flow channel; 5. Fixing unit; 51. Arc cap; 52. Plastic film; 53. Adhesive tape; 54. First buckle; 55. Second buckle; 56. Shaft; 57. Torsion spring; 58. Rubber pad. DETAILED DESCRIPTION

[0020] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed solely to enable those skilled in the art to better understand and implement the subject matter described herein, and that the functions and arrangements of the elements discussed may be varied without departing from the scope of this specification. Various examples may omit, substitute, or add various processes or components as needed. In addition, features described with respect to some examples may also be combined in other examples.

[0021] according to Figure 1 and Figure 5 As shown, a multifunctional urinary catheter kit includes a urinary catheter 1, wherein the insertion end of the urinary catheter 1 is provided with an opening; the urinary catheter 1 is also provided with a filling unit 4, and the filling unit 4 includes an air bag 41 and a water injection pipe 42 provided on the urinary catheter 1, wherein the air bag 41 is close to the opening position, and the water injection pipe 42 is far from the opening position, and a water flow channel 43 is provided between the air bag 41 and the water injection pipe 42, and the water flow channel 43 is opened inside the urinary catheter 1.

[0022] Furthermore, the airbag 41 is configured in a conical structure, with a length and width of 3.8 cm when expanded. The prostate fossa after prostatectomy is a conical cavity, and when expanded, the conical airbag 41 can compress the bladder neck, forming a wedge-like compression, thereby improving hemostasis efficiency.

[0023] It should be noted that the compression area of ​​the tip of the conical airbag 41 on the bladder neck is 30% smaller than the contact area of ​​the traditional spherical airbag, which avoids long-term compression and ischemia of the bladder neck mucosa, reduces irritation to the bladder trigone, and reduces bladder irritation syndrome.

[0024] according to Figure 5 and Figure 6 As shown, the catheter 1 is further provided with a fixing unit 5, which includes arc-shaped caps 51 arranged on both sides of the catheter 1, and a plastic film 52 is provided between the arc-shaped caps 51. The arc-shaped caps 51 and the plastic film 52 are fixedly connected, and an adhesive tape 53 is provided on the side away from the arc-shaped caps 51.

[0025] It should be understood that after the airbag 41 is inflated, the catheter 1 is pulled outward so that the airbag 41 fits tightly against the bladder neck to prevent bleeding from the prostatic urethra wound into the bladder. After the pulling is completed, the arc-shaped cap 51 is clamped on the glans penis and adhered with the adhesive tape 53 to fix the catheter 1 and keep it tightly fitted.

[0026] according to Figure 7 As shown, a through hole for the catheter 1 to pass through is provided between the two groups of arc-shaped caps 51, and a first buckle 54 and a second buckle 55 are provided at the through hole. The two groups of arc-shaped caps 51 are fixedly connected to the first buckle 54 and the second buckle 55 respectively. A shaft rod 56 is installed inside the first buckle 54, and the shaft rod 56 is rotatably connected to the second buckle 55. A torsion spring 57 is provided on the shaft rod 56, and the two ends of the torsion spring 57 are fixedly connected to the first buckle 54 and the second buckle 55 respectively. A plurality of rubber pads 58 are provided on the inner wall of the second buckle 55.

[0027] Specifically, through the arrangement of the first clip 54 and the second clip 55, when the fixing unit 5 needs to be assembled on the catheter 1, by pressing the second clip 55, the torsion spring 57 produces elastic deformation. At the same time, the second clip 55 drives the arc cap 51 to rotate, squeezes the plastic film 52, and assembles the arc cap 51 on the catheter 1.

[0028] After adjusting the pulling distance, the pulling tightness is adjusted by adjusting the position of the arc-shaped cap 51 on the catheter 1. The provision of the rubber pad 58 increases the friction between the catheter 1 and the second buckle 55, thereby preventing the catheter 1 from loosening.

[0029] according to Figures 1 to 4 As shown, when urethral stricture complications occur after surgery, leading to urethral stricture, obstruction of urine flow, and adverse effects on normal urination function, the urethra is dilated and catheterized through a multifunctional catheter kit to assist urethral recovery.

[0030] Among them, a multifunctional urinary catheter kit also includes a guide wire 2; and an expansion strip 3, the expansion strip 3 includes a first expansion section 31 and a second expansion section 32, the first expansion section 31 is configured to be arc-shaped, and the second expansion section 32 is configured to be curved.

[0031] Among them, the arc-shaped design of the first expansion section 31 of the expansion strip 3 and the curved structure of the second expansion section 32 form a bionic form. After the front end enters the bladder, the curved part automatically restores its shape, and prompts the operator to expand the channel accurately through the physical feedback mechanism, while reducing the rigid stimulation to the bladder wall and reducing the probability of bladder spasm.

[0032] according to Figures 1 to 4As shown, a first node 33 is provided at one end of the first expansion segment 31 away from the second expansion segment 32, a second node 34 is provided between the first expansion segment 31 and the second expansion segment 32, and a third node 35 is provided at one end of the second expansion segment 32 away from the first expansion segment 31; the diameter of the second expansion segment 32 increases step by step from the third node 35 to the second node 34, which can perform gradual physical expansion of the narrow urethra during the insertion process, thereby avoiding the risk of urethral mucosal tearing caused by sudden pressure of traditional disposable large-diameter dilators.

[0033] The front end of the guide wire 2 is soft and deformable, the middle and rear ends are flexible and coordinated, and the surface is coated with a hydrophilic coating, which makes the bending and direction changes smoother, has good smoothness and passability, can easily pass through the narrow and damaged urethra, easily enter the bladder, and is not easy to damage the urethral mucosa.

[0034] A miniature camera can be installed at the insertion end of the guide wire 2 to observe the inside of the urethra, achieve visual guidance, and solve the problem of inaccurate positioning in traditional blind operations. It is especially suitable for complex cases of urethral stenosis combined with anatomical abnormalities.

[0035] It should be noted that the guidewire 2 is slowly inserted through the urethral opening by utilizing the soft and deformable front end of the guidewire 2 and the low friction coefficient of the hydrophilic coating. The flexible and coordinated design of the middle and rear ends provides the necessary pushing support force, allowing the guidewire 2 to conform to the physiological curvature of the urethra, such as the anterior and inferior curvature of the pubic bone, and to find potential cavities through flexible exploration of the front end when encountering a narrow section. If equipped with a micro camera, it can transmit real-time images of the internal urethra, accurately identifying the location and degree of stenosis and the state of surrounding tissues, ensuring that the guidewire 2 accurately enters the bladder and completes the initial guide channel construction.

[0036] according to Figure 3 and Figure 4 As shown, the outer diameters of the first node 33 and the second node 34 are 6 mm, and the outer diameter of the third node 35 is 2 mm.

[0037] Furthermore, the first expansion section 31 and the second expansion section 32 are integrally formed, and the length of the second expansion section 32 is 10 cm.

[0038] according to Figure 2 As shown, the expansion strip 3 is made of silicone and coated with a hydrophilic coating. The first expansion section 31 and the second expansion section 32 define a cavity within which the guidewire 2 can pass. The elastic deformation properties of the silicone material combined with the smoothness of the hydrophilic coating allow the expansion strip 3 to conform to the physiological curvature of the urethra, reducing mechanical friction damage. Patients no longer have to endure the invasive procedure of repeatedly replacing expansion strips 3 of different specifications, significantly reducing the incidence of complications such as urinary tract infections and scarring.

[0039] Working principle: According to Figures 1 to 4As shown, first, the front end of the guide wire 2 is inserted through the urethral opening and slowly inserted into the bladder.

[0040] Then, the front end of the expansion strip 3 is passed through the guide wire 2 so that the expansion strip 3 is pushed in along the guide wire 2. Since the front end of the soft silicone expansion strip 3 is thinner, it is easier to insert.

[0041] When the front end of the soft silicone expansion strip 3 enters the bladder and the insertion depth of the front end exceeds the guide wire 2, the front end of the soft silicone expansion strip 3 will automatically restore its curved shape to reduce the stimulation to the bladder wall. The patient can also feel that there is a foreign body entering the bladder, further confirming that the urethral expansion channel is accurate. It is suitable for emergency dilation treatment of acute urethral stenosis, and can also be used for long-term catheterization after surgery to maintain urethral patency, meeting the clinical needs of short-term dilation and long-term repair, especially for patients with neurogenic bladder, prostate hyperplasia, etc. who need long-term catheterization. It has important application value.

[0042] As the silicone expansion strip 3 is implanted through the urethra, the diameter of the silicone expansion strip 3 becomes larger and larger, thereby gradually expanding the narrow urethra.

[0043] Finally, if indwelling catheterization is required, the silicone dilator strip 3 can be slowly withdrawn, leaving the guide wire 2 in the urethra, and the urinary catheter 1 with the front opening inserted along the guide wire 2. This can also achieve long-term urethral dilation, facilitate urethral mucosal repair, and reduce scarring and restenosis.

[0044] The kit achieves step-by-step expansion, eliminating the need for repeated replacement of the expansion strip 3, reducing pain and risk for patients. The integrated expansion and catheterization design greatly expands the scope of use.

[0045] according to Figures 1 to 7 As shown, a method for using a multifunctional urinary catheter kit includes the following steps: S1. During surgery for benign prostatic hyperplasia, a urinary catheter 1 is inserted into the urethra and into the bladder; S2. Water is injected into the water injection tube 42 to expand the airbag 41, pulling the urinary catheter 1 outward, directly wedge-type compressing the bladder neck, and mechanically blocking the blood flow from the ruptured blood vessels in the prostate or urethra surgical wound into the bladder through compression and hemostasis; S3. After the airbag 41 is inflated, the urinary catheter 1 is pulled outward, and the fixing unit 5 fixes the urinary catheter 1 to maintain the pulled state of the urinary catheter 1, so that the airbag 41 fits tightly against the bladder neck, preventing blood from the prostate or urethral wound from entering the bladder and forming bladder blood clots; S4. After recovery from prostate hyperplasia surgery, if urethral stenosis, obstructed urine flow or other catheterization difficulties occur, insert the front end of the guide wire 2 through the urethral opening, repeatedly test, and slowly insert it into the bladder; S5. Use the expansion strip 3. Pass the front end of the expansion strip 3 through the guide wire 2 and push it along the guide wire 2 to gradually expand the narrow urethra. The expansion strip 3 is soft and not easy to bend, and can be coiled in the bladder. S6. When the patient needs catheterization, the expansion strip 3 can be slowly extracted, the guide wire 2 in the urethra can be retained, and the urinary catheter 1 with the front end opening can be inserted along the guide wire 2 for indwelling catheterization.

[0046] The above describes an embodiment of this specific implementation method, but this embodiment is not limited to the above specific implementation method. The above specific implementation method is merely illustrative and not restrictive. Ordinary technicians in this field can also make many forms based on the inspiration of this embodiment, all of which are protected by this embodiment.

Claims

1. A multifunctional urinary catheter kit, characterized in that: include: A urinary catheter (1), wherein the insertion end of the urinary catheter (1) is provided with an opening; A filling unit (4) comprising an air bag (41) and a water injection pipe (42) arranged on the urinary catheter (1), wherein the air bag (41) is close to the opening position and is arranged in a conical structure, and the water injection pipe (42) is arranged at a position away from the opening, and a water flow channel (43) is provided between the air bag (41) and the water injection pipe (42), and the water flow channel (43) is opened inside the urinary catheter (1).

2. A multifunctional urinary catheter kit according to claim 1, characterized in that: The unfolded length and width of the airbag (41) are both 3.8 cm.

3. The multifunctional urinary catheter kit according to claim 1, characterized in that: The urinary catheter (1) is further provided with a fixing unit (5), the fixing unit (5) comprising arc-shaped caps (51) provided on both sides of the urinary catheter (1), and a plastic film (52) provided between the arc-shaped caps (51), the arc-shaped caps (51) and the plastic film (52) being fixedly connected, and an adhesive tape (53) is provided on the side of the arc-shaped caps (51) away from each other.

4. The multifunctional urinary catheter kit according to claim 3, characterized in that: A through hole for the urinary catheter (1) to pass through is provided between the two groups of arc-shaped caps (51), and a first buckle (54) and a second buckle (55) are provided at the through hole. The two groups of arc-shaped caps (51) are fixedly connected to the first buckle (54) and the second buckle (55), respectively. A shaft (56) is installed inside the first buckle (54), and the shaft (56) is rotatably connected to the second buckle (55). A torsion spring (57) is provided on the shaft (56), and the two ends of the torsion spring (57) are fixedly connected to the first buckle (54) and the second buckle (55), respectively. A plurality of rubber pads (58) are provided on the inner wall of the second buckle (55).

5. The multifunctional urinary catheter kit according to claim 1, characterized in that: It also includes a guide wire (2), and the urinary catheter (1) can pass outside the guide wire (2). A miniature camera can be installed on the insertion end of the guide wire (2) for observing the inside of the urethra to achieve visual guidance.

6. The multifunctional urinary catheter kit according to claim 5, characterized in that: The guide wire (2) further comprises an expansion strip (3), wherein the expansion strip (3) is capable of passing outside the guide wire (2), and the expansion strip (3) comprises a first expansion section (31) and a second expansion section (32), wherein the first expansion section (31) is arranged in an arc shape, and the second expansion section (32) is arranged in a curved shape; A first node (33) is provided at one end of the first expansion section (31) away from the second expansion section (32), a second node (34) is provided between the first expansion section (31) and the second expansion section (32), and a third node (35) is provided at one end of the second expansion section (32) away from the first expansion section (31); The diameter of the second expansion section (32) increases step by step from the third node (35) to the second node (34).

7. The multifunctional urinary catheter kit according to claim 6, characterized in that: The outer diameters of the first node (33) and the second node (34) are 6 mm, and the outer diameter of the third node (35) is 2 mm.

8. The multifunctional urinary catheter kit according to claim 6, characterized in that: The first expansion section (31) and the second expansion section (32) are integrally formed, and the length of the second expansion section (32) is 10 cm.

9. The multifunctional urinary catheter kit according to claim 6, characterized in that: A cavity is provided inside the first expansion section (31) and the second expansion section (32), and the guide wire (2) is capable of passing through the cavity.

10. A method for using a multifunctional urinary catheter kit, using the multifunctional urinary catheter kit according to any one of claims 1 to 9, characterized in that: The steps are as follows: S1. During BPH surgery, a urinary catheter (1) is inserted through the urethra and into the bladder; S2. Inject water into the water injection tube (42) to expand the airbag (41), pull the urinary catheter outward, and directly wedge-type press the bladder neck. Through mechanical pressure, the blood flow from the ruptured blood vessels in the prostate or urethra surgical wound into the bladder is blocked, thereby compressing and stopping bleeding; S3. After the airbag (41) is inflated, the urinary catheter (1) is pulled outward, and the fixing unit (5) fixes the urinary catheter (1) to maintain the pulled state of the urinary catheter (1), so that the airbag (41) is closely fitted to the bladder neck, preventing blood flow from the prostate or urethra wound from entering the bladder to form bladder blood clots; S4. After recovery from prostate hyperplasia surgery, if urethral stenosis, obstructed urinary flow or other catheterization difficulties occur, insert the front end of the guide wire (2) through the urethral opening, repeatedly test, and slowly insert it into the bladder; S5. Use the expansion strip (3), pass the front end of the expansion strip (3) through the guide wire (2), and push it along the guide wire (2) to gradually expand the narrow urethra. The expansion strip is soft and not easy to break, and can be coiled in the bladder; S6. When the patient needs urinary catheterization, the expansion strip (3) can be slowly withdrawn, the guide wire (2) can be retained in the urethra, and the urinary catheter (1) with the front end opening can be inserted along the guide wire (2) for indwelling urinary catheterization.

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