Urethral catheter with special-shaped fixing device

Abstract

The invention relates to the field of medical catheters, and particularly discloses a catheter with a special-shaped fixing device, the catheter comprises a catheter main body and the special-shaped fixing device, the special-shaped fixing device has good elasticity, and a bundling belt and a bending and twisting induction unit are distributed in the special-shaped fixing device. According to the catheter, the specially-designed elastic cavity or corrugated pipeline supports the specially-shaped fixing device which is elastically bent or twisted to be positioned and fixed in the bladder, the deformation condition of the specially-shaped fixing device in the head area of the catheter can be changed according to use requirements, a catheterization opening is pressed down, the catheter adapts to the shape of the bladder, and the catheter can be used for fixing the bladder. Urine in the bladder can be fully emptied in the conduction direction through the catheterization opening, the blocking probability of the interior of the catheter is reduced, the injury and infection risks caused by frequent replacement of the catheter to a patient are reduced, and the safety and convenience of long-term indwelling catheterization are improved.

Description

Technical Field

[0001] The present application relates to the field of medical catheters, and in particular to a urinary catheter with a special-shaped fixator. Background Art

[0002] For urinary difficulties and urinary incontinence caused by physiological and disease factors, indwelling urinary catheters are still the main means to relieve urinary disorders, and their clinical application is becoming more and more widespread. During this operation, the anti-drop balloon of the urinary catheter raises the urinary catheter port, resulting in difficulty in emptying urine, urine concentration and crystallization, increased endocrine secretions and bacterial deposition, causing urinary tract infection and catheter blockage.

[0003] The current conventional solution to this problem is for doctors to instruct patients to drink more water and urinate more to flush away sediments through urine, shorten the replacement cycle of long-term indwelling catheters, or flush the bladder regularly. These solutions are not based on the structure and use of catheters. Long-term indwelling catheters are too deep in the bladder and have a long fixed length. The anti-detachment balloon raises the position of the catheter port, which can cause incomplete urination. After some urinary stone surgeries, it is impossible to discharge gravel and sediment in time, resulting in residual urine, concentration, crystallization, bacteria or stone deposition, which causes obstruction and infection. Summary of the invention

[0004] In order to improve the safety and convenience of long-term indwelling catheterization, the present application provides a catheter with a special-shaped fixator.

[0005] The present application provides a urinary catheter with a special-shaped fixator adopts the following technical solution: A urinary catheter with a special-shaped fixator, comprising a urinary catheter body and a special-shaped fixator arranged on the urinary catheter body; Wherein, the catheter body comprises a main catheterization channel and an air / liquid channel; The special-shaped fixator comprises: An elastic chamber is located at the head and neck of the catheter body, the elastic chamber is connected to the inflation / liquid channel, and is sealed at the air / liquid inlet of the inflation / liquid channel; A shape-bearing belt fixed in the wall of the elastic chamber, wherein the elastic deformation of the shape-bearing belt is smaller than the elastic deformation of the wall of the elastic chamber; and The bending and twisting inducer is fixedly connected to the inside of the special-shaped fixator, and is used to guide the special-shaped fixator to produce elastic bending or twisting to present a special shape after being filled with gas or liquid, and to control the degree and direction of deformation of the special-shaped fixator; the deformation of the special-shaped fixator causes the head and neck of the catheter body to bend and twist.

[0006] Furthermore, the elastic deformation of the bending-torsion inducer is smaller than the elastic deformation of the elastic chamber wall and the beam.

[0007] Furthermore, the wall surface of the elastic chamber is designed to be either a smooth annular tube or a corrugated tube or a combination of the two.

[0008] Furthermore, the cross-sectional waveform of the corrugated tube is any one of C-shape, U-shape, S-shape, square, Ω-shape, and stepped shape, or a combination of several of them.

[0009] Furthermore, the structure of the tie belt is any one of vertical stripes, spiral stripes, ring stripes, twill stripes, and mesh stripes, or a combination of several of them.

[0010] Furthermore, one or more bending and torsion inducers divide the interior of the special-shaped fixator into one or more elastic chambers, and each of the elastic chambers is connected to an independent air / liquid channel.

[0011] Preferably, the bending and twisting inducer is parallel or spiral along the catheter, guiding the special-shaped fixator to bend or twist elastically during operation.

[0012] Preferably, when one or more of the elastic chambers are filled with gas or liquid, the bending and twisting inducer guides the special-shaped fixator to bend and twist in a corresponding direction, thereby achieving control over the degree and direction of the bending and twisting of the special-shaped fixator.

[0013] Furthermore, the catheter body is provided with a plurality of catheter openings, all of which are connected to the main catheterization channel, wherein at least one of the catheter openings is located at the end of the catheter body, and at least one of the catheter openings is located near the special-shaped fixator.

[0014] Preferably, the length of the special-shaped fixator is 20-50 mm.

[0015] Preferably, the base material of the catheter body is any one or a combination of latex, rubber, polyvinyl chloride and polyurethane.

[0016] Preferably, the wall surface, the beam and the bending and torsion inducer of the elastic chamber are made of any one or a combination of latex, rubber and polyurethane materials.

[0017] The elastic deformation of the bending and torsion inducer is smaller than that of the elastic chamber wall and the bundle band, and can play a good guiding and supporting role in the deformation of the elastic chamber wall, guiding the control of the degree and direction of bending and torsion of the special-shaped fixator after it is filled with gas or liquid.

[0018] The shape-bearing band constrains the deformation of the wall of the elastic chamber to constrain the shape of the deformed fixator, while avoiding stress concentration and preventing damage to the wall. Selecting the appropriate number, width and spacing of the shape-bearing bands is conducive to ensuring that the elastic chamber is smoothly bent and twisted and has a suitable curvature after being filled with gas or liquid.

[0019] Gas or liquid is filled into the elastic chamber of the special-shaped fixator through the gas / liquid channel. Under the constraints of the shape belt and the bending and twisting inducer, the elastic chamber bulges and drives the catheter to bend or twist elastically; with the help of the expanded volume, the special-shaped fixator can be fixed in the bladder. At the same time, due to the small elastic deformation of the shape belt, the deformation of the wall of the elastic chamber is limited, so that the bulging special-shaped fixator presents an uneven surface, which is conducive to the stable fixation of the special-shaped fixator in the bladder.

[0020] The head of the catheter body bends and twists with the special-shaped fixator, thereby lowering the catheter port and adapting to the shape of the bladder, so that the urine and sediment in the bladder can be completely emptied along the conduction direction, reducing the probability of blockage in the catheter lumen, reducing the risk of damage and infection to patients caused by frequent replacement of catheters, and increasing the safety and convenience of long-term indwelling catheterization.

[0021] The present application also provides a method for using the above-mentioned urinary catheter with a special-shaped fixator, comprising the following steps: Insert the catheter along the urethra to allow the special-shaped fixator to reach the bladder; After the elastic chamber is filled with gas or liquid through the inflation / liquid channel, it is sealed, causing the wall of the elastic chamber to bulge and bend and twist to form a special-shaped fixed state under the constraint and guidance of the restraint band and the bending and twisting inducer, thereby fixing the catheter in the bladder and lowering the position of the catheter port to discharge urine and sediment from a low position.

[0022] Furthermore, the method further comprises the following steps: changing the degree of bulging and bending of the special-shaped fixator by controlling the amount of gas or liquid filled into the elastic chamber.

[0023] Furthermore, the method further comprises the following steps: filling gas or liquid into different elastic chambers to make the special-shaped fixator bend and twist in different directions.

[0024] Preferably, the method further comprises the following steps: before inserting the catheter into the urethra, a lubricant is coated on the outside of the catheter, wherein the lubricant is any one or more of a silicone lubricant, a gel, a water-based lubricant and a polyvinyl alcohol lubricant, and the catheter body and the special-shaped fixator do not react with the selected lubricant such as swelling.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The special-shaped fixator provided by the present application realizes gas / liquid driven expansion and bending and twisting of the special-shaped fixator through structural constraints and elastic deformation differences between the elastic chamber, the shaped belt and the bending and twisting inducer. By controlling the amount of gas or liquid filled, the degree of bulging, bending and twisting of the special-shaped fixator can be changed; by filling gas or liquid into different elastic chambers, the special-shaped fixator can be bent and twisted in different directions to meet different usage requirements; 2. When the urinary catheter is fixed in the bladder, the head and neck of the urinary catheter are elastically bent or twisted by the bulging, twisting and deforming special-shaped fixator, and the catheter port of the urinary catheter is pressed down by the special-shaped fixator. At the same time, the special-shaped fixator is deformed to fit the shape of the bladder, which is conducive to the emptying of urine and sediment in the bladder, reduces the risk of obstruction and infection caused by urine residue, concentration, crystallization, bacteria or stone deposition, and increases the safety and convenience of long-term indwelling catheterization. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of a urinary catheter with a special-shaped fixator in an embodiment of the present application; Figure 2 : is a diagram of the elastic chamber of the special-shaped fixator in the embodiment of the present application, and a schematic diagram of the shaped belt and the bending and torsion inducer, wherein: (a) is a schematic diagram of the elastic chamber wall using a smooth annular tube, (a-1) and (a-2) are schematic diagrams of the combination of a twill-shaped beam and a bending-twist inducer parallel to the tube, (a-3) is a schematic diagram of the combination of a mesh-shaped beam and a bending-twist inducer parallel to the tube, and (a-4) is a schematic diagram of the combination of a twill-shaped beam and a spiral bending-twist inducer along the tube; (b) is a schematic diagram of the elastic chamber wall using a bellows, (b-1) is a schematic diagram of using two cross-bending and torsion inducers, (b-2) is a schematic diagram of the beam with vertical stripes, (b-3) is a schematic diagram of the beam with diagonal stripes, and (b-4) is a schematic diagram of using two bending and torsion inducers to separate the elastic chamber into two independent chambers; (c-1) to (c-6) are schematic diagrams of the cross-sectional waveforms of the bellows being C-shaped, U-shaped, S-shaped, square-shaped, Ω-shaped, and stepped; Figure 3 1 is a diagram showing the working effect of the special-shaped fixator in the embodiment of the present application, wherein (a) is a schematic diagram showing that the elastic chamber wall adopts a smooth annular tube, (b) is a schematic diagram showing that the elastic chamber wall adopts a corrugated tube, and (c) is a schematic diagram showing that the special-shaped fixator is fixed in the bladder when the elastic chamber wall adopts a smooth annular tube design.

[0027] Figure numerals: 1. Special-shaped fixator; 1-1. Elastic chamber; 1-2. Constricting belt; 1-3. Bending and twisting inducer; 2. Catheter body; 2-1. Catheterization main channel; 2-2. Inflation / liquid channel; 2-3. Flushing and injection channel; 2-4. Catheterization port; 2-5. Inflation / liquid outlet; 2-6. Flushing and injection outlet; 2-7. Urine outlet; 2-8. Inflation / liquid inlet; 2-9. Flushing and injection inlet. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-3 This application is described in further detail.

[0029] The present application embodiment discloses a urinary catheter with a special-shaped fixator. Figure 1 The urinary catheter comprises a urinary catheter body 2 and a special-shaped fixator 1.

[0030] Among them, refer to Figure 1 The catheter body 2 includes a main catheter channel 2-1, and two ends of the main catheter channel 2-1 are respectively provided with a catheter port 2-4 and a urine outlet 2-7. When in use, urine enters the main catheter channel 2-1 through the catheter port 2-4 and then flows out from the urine outlet 2-7. The base material of the catheter body 2 can be any one or a combination of rubber, polyvinyl chloride and polyurethane.

[0031] Reference Figure 1 A flushing and injection channel 2-3 and an inflation / liquid channel 2-2 are respectively arranged on both sides of the main catheterization channel 2-1, a flushing and injection inlet 2-9 and a flushing and injection outlet 2-6 are respectively arranged at both ends of the flushing and injection channel 2-3, and an inflation / liquid inlet 2-8 and an inflation / liquid outlet 2-5 are respectively arranged at both ends of the inflation / liquid channel 2-2.

[0032] Reference Figure 1 and Figure 2 In (a), the special-shaped fixator 1 includes an elastic chamber 1-1, a shaped belt 1-2 and a bending and twisting inducer 1-3. The shaped belt 1-2 and the bending and twisting inducer 1-3 are both elastic, and the elastic deformation of the wall of the elastic chamber 1-1, the shaped belt 1-2 and the bending and twisting inducer 1-3 decreases in sequence. The wall of the elastic chamber 1-1, the shaped belt 1-2 and the bending and twisting inducer 1-3 can be made of any one or a combination of latex, rubber and polyurethane materials, and do not swell with the selected lubricant (any one or a combination of silicone lubricants, gels, water-based lubricants and polyvinyl alcohol lubricants) to affect its elastic properties.

[0033] Specifically, Figure 2 As shown in (a) and (b) in FIG. 1 , the wall of the elastic chamber 1 - 1 is either a smooth annular tube or a bellows or a combination of the two. Figure 2 As shown in (c-1) to (c-6), the cross-sectional waveform of the bellows is any one of C-shape, U-shape, S-shape, square, Ω-shape, and stepped shape, or a combination of several of them.

[0034] Reference Figure 1 The elastic chamber 1-1 is sealed at the head and neck of the catheter body 2. The wall of the elastic chamber 1-1 is the wall of the catheter body or the elastic wall bonded to the outside of the catheter body 2. The inflation / liquid outlet 2-5 is arranged in the elastic chamber and connected to the inflation / liquid channel 2-2 on the catheter body 2 and is sealed at the inflation / liquid interface 2-8.

[0035] Reference Figure 1 and Figure 2 The shaped belt 1-2 includes a plurality of belts fixed in the wall of the elastic chamber 1-1, each belt extends along the circumferential direction of the wall of the elastic chamber 1-1, and the plurality of belts are arranged in sequence and at equal intervals along the axial direction of the elastic chamber 1-1. The shaped belt 1-2 is any one or a combination of vertical stripes, spiral stripes, annular stripes, twill stripes, and mesh stripes.

[0036] Reference Figure 1 and Figure 2 One or more bending and twisting inducers 1-3 are arranged, and the bending and twisting inducers 1-3 are fixedly connected between the wall surface of the elastic chamber 1-1 and the outer wall of the catheter body 2, so that one or more elastic chambers 1-1 are formed between the special-shaped fixator 1 and the catheter body 2, and each elastic chamber 1-1 is respectively connected to an independent inflation / liquid channel 2-2.

[0037] After filling the elastic chamber 1-1 with gas or liquid through the inflation / liquid channel 2-2, it is sealed in time. Under the constraints of the shape belt 1-2 and the bending and twisting inducer 1-3, the special-shaped fixator 1 swells elastically and twists to form a special-shaped balloon with an uneven surface, so that the special-shaped fixator is fixed in the bladder. At the same time, the head and neck of the catheter body 2 are deformed with the bending and twisting of the special-shaped fixator, thereby lowering the catheter port 2-4, adapting to the shape of the bladder, facilitating the emptying of urine and sediment in the bladder, reducing the risk of obstruction and infection caused by urine residue, concentration, crystallization, bacteria or stone deposition, reducing the damage and infection risk caused to patients by frequent replacement of catheters, and increasing the safety and convenience of long-term indwelling catheterization.

[0038] Reference Figure 1 and Figure 3 When the bending and twisting inducer 1-3 is set as a line segment parallel to the catheter, the bending and twisting inducer 1-3 and the catheter port 2-4 at the end of the catheter body 2 are located on the same side of the catheter axis. When the special-shaped fixator 1 is directional bent toward the side where the bending and twisting inducer 1-3 is located, the head and neck of the catheter are bent to fix and lower the position of the catheter port 2-4, so that the urine in the bladder can be discharged from a low position.

[0039] Reference Figure 1 and Figure 3 When the bending and twisting inducer 1-3 is set as a spiral line segment spiraling along the catheter, when the special-shaped fixator 1 is twisted toward the position where the bending and twisting inducer 1-3 is located, the head and neck of the catheter are twisted to fix and depress the position of the catheter port 2-4.

[0040] When the bending and torsion inducers 1-3 are provided in multiple pieces, for example, two pieces are provided, such as Figure 2As shown in (b-4), two bending and twisting inducers 1-3 separate the space between the special-shaped fixator 1 and the catheter body 2 into two independent elastic chambers 1-1, and the two elastic chambers are symmetrically distributed on both sides of the axis of the catheter body 2. Correspondingly, two inflation / liquid channels 2-2 are also provided, and the two inflation / liquid channels 2-2 are respectively connected to the corresponding elastic chambers 1-1. By introducing liquid or gas into different elastic chambers 1-1, the special-shaped fixator 1 can be bent in different directions.

[0041] The length of the special-shaped fixator 1 is 20-50 mm. In order to ensure that the special-shaped fixator 1 is smoothly bent and twisted and has a suitable curvature, the number of straps or the number of corrugations of the corrugated tube is not less than 10.

[0042] Further, the urinary catheter 2-4 is provided with a plurality of, as an example, refer to Figure 1 and Figure 3 The urinary catheter openings 2-4 are provided in two, one of which is located at the end of the urinary catheter body 2, and the other is located near the special-shaped fixator 1. Figure 3 As shown in (c), when the special-shaped fixator 1 is fixed in the bladder, the catheter port 2-4 located at the end of the catheter body 2 is pressed down as the special-shaped fixator 1 is deformed; the catheter port 2-4 located near the special-shaped fixator 1 is kept at a low position in the bladder, and the two catheter ports 2-4 jointly play a catheterization role, which is conducive to the discharge of urine in the bladder from a low position.

[0043] The following is a specific example of the processing and use of the catheter: Example 1 In this embodiment, the wall of the elastic chamber 1-1 is made of latex, the shape belt 1-2 and the bending and torsion inducer 1-3 are made of silicone rubber with different elasticity, and the elasticity of the wall of the elastic chamber 1-1, the shape belt 1-2 and the bending and torsion inducer 1-3 decreases in sequence. During processing, the shape belt 1-2 is positioned in a molding mold, latex is injected for molding, and the shape belt 1-2 is cut into a suitable length to obtain an elastic pipe for fixing the shape belt 1-2 in the wall.

[0044] The catheter body 2 is made of silicone rubber material and is manufactured using extrusion molding and injection molding processes. The catheter body 2 is provided with a urinary catheter port 2-4, an air / liquid outlet 2-5, and a flushing and injection outlet 2-6. The special-shaped fixator 1 is sleeved on the outside of the catheter body 2, and then the elastic pipe with the tie band 1-2 is shaped and bonded to the outer wall of the catheter body 2 through the bending and twisting inducer 1-3, forming an elastic chamber 1-1 with a specific shape and connecting the corresponding air / liquid channel 2-2, completing the design of the special-shaped fixator 1.

[0045] In this embodiment, the wall of the elastic chamber 1-1 is designed with a smooth ring tube, with a tube length of 50 mm, and the inner diameter of the smooth ring tube is 1 mm larger than the outer diameter of the catheter body 2. The strap 1-2 is a plurality of vertical stripes arranged in parallel, each strap has a width of 0.5 mm, and the parallel interval between two adjacent straps is 1 mm. The bending and twisting inducer 1-3 is set as a line segment about 50 mm long parallel to the catheter.

[0046] The use of a urinary catheter involves the following steps: Step 1: Apply a proper amount of silicone oil lubricant on the outer wall of the catheter, insert the catheter along the urethra, and allow the special-shaped fixator 1 to reach the bladder.

[0047] Step 2: Fill the elastic chamber 1-1 between the special-shaped fixator 1 and the catheter body 2 with air or sterile saline through the air / liquid channel 2-2, so that the special-shaped fixator 1 swells and is directional-bent and twisted into a special shape (such as Figure 3 As shown in a in the figure, the volume of the shaped fixator 1 after swelling is larger than the internal opening of the urethra, thereby fixing it in the bladder. When the shaped fixator 1 undergoes elastic bending and twisting deformation, the head and neck of the catheter are bent and twisted, and the catheter opening 2-4 is bent and twisted toward the side where the bending and twisting inducer 1-3 is located (as shown in a in the figure). Figure 3 As shown in c in the figure, the position of the urethral catheter 2-4 is pressed down to discharge the urine from a low position.

[0048] Step 3: When it is necessary to remove the special-shaped fixator 1 from the bladder, the gas or liquid in the elastic chamber 1-1 is discharged from the inflation / liquid inlet 2-8, and the elastic chamber 1-1 contracts and becomes smaller under the elasticity of its own wall surface. At the same time, the bending and torsion inducer 1-3 is straightened from the bending and torsion under the action of its own elasticity, so that the fixation of the special-shaped fixator 1 in the bladder can be released.

[0049] Example 2 The difference from Example 1 is that the elastic chamber 1-1, the tie band 1-2 and the bending and torsion inducer 1-3 in Example 2 are respectively made of silicone rubber with different elasticity, and the elastic deformation of the wall of the elastic chamber 1-1, the tie band 1-2 and the bending and torsion inducer 1-3 decreases successively; the catheter body 2 is made of natural rubber.

[0050] The wall of the elastic chamber 1-1 is a bellows with a length of 40 mm. The cross-sectional waveform of the bellows is C-shaped. The inner diameter of the bellows is 2 mm larger than the outer diameter of the catheter body 2, and the number of corrugations is greater than 10. The beam 1-2 is a plurality of vertically shaped beams arranged in parallel, each beam has a width of 0.5 mm, and the parallel interval between two adjacent beams is 1 mm. The bending and twisting inducer 1-3 is set as a spiral line segment that spirals along the catheter for nearly a circle.

[0051] The method of using the urinary catheter is the same as that in Example 1.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A urinary catheter with a special-shaped fixator, characterized in that: It includes a urinary catheter body and a special-shaped fixator arranged on the urinary catheter body; Wherein, the catheter body comprises a main catheterization channel and an air / liquid channel; The special-shaped fixator comprises: An elastic chamber is located at the head and neck of the catheter body, the elastic chamber is connected to the inflation / liquid channel and is sealed at the air / liquid inlet of the inflation / liquid channel; A shape-bearing belt fixed in the wall of the elastic chamber, wherein the elastic deformation of the shape-bearing belt is smaller than the elastic deformation of the wall of the elastic chamber; and The bending and twisting inducer is fixedly connected to the inside of the special-shaped fixator, and is used to guide the special-shaped fixator to produce elastic bending or twisting to present a special shape after being filled with gas or liquid, and to control the degree and direction of deformation of the special-shaped fixator; the deformation of the special-shaped fixator causes the head and neck of the catheter body to bend and twist.

2. A urinary catheter with a special-shaped fixator according to claim 1, characterized in that: The elastic deformation of the bending-torsion inducer is smaller than the elastic deformation of the elastic chamber wall and the beam.

3. A urinary catheter with a special-shaped fixator according to claim 2, characterized in that: The wall surface of the elastic chamber is designed to be either a smooth annular tube or a corrugated tube or a combination of the two.

4. A urinary catheter with a special-shaped fixator according to claim 3, characterized in that: The cross-sectional waveform of the corrugated tube is any one of C-shape, U-shape, S-shape, square, Ω-shape and step-shape or a combination of several of them.

5. The urinary catheter with a special-shaped fixator according to claim 1, characterized in that: The structure of the tie belt is any one of vertical stripes, spiral stripes, ring stripes, twill stripes, and mesh stripes, or a combination of several of them.

6. The urinary catheter with a special-shaped fixator according to claim 1, characterized in that: One or more bending and twisting inducers divide the interior of the special-shaped fixator into one or more elastic chambers, and each elastic chamber is connected to an independent air / liquid channel.

7. The urinary catheter with a special-shaped fixator according to claim 1, characterized in that: The catheter body is provided with a plurality of catheter openings, all of which are connected to the main catheterization channel, wherein at least one of the catheter openings is located at the end of the catheter body, and at least one of the catheter openings is located near the special-shaped fixator.

8. A method for using a urinary catheter with a special-shaped fixator according to any one of claims 1 to 7, characterized in that: The following steps are involved: Insert the catheter along the urethra to allow the special-shaped fixator to reach the bladder; After filling the elastic chamber with gas or liquid through the inflation / liquid channel, it is sealed in time, so that the wall of the elastic chamber bulges and bends and twists into a special-shaped fixed state under the constraint and guidance of the restraint band and the bending and twisting inducer, thereby fixing the catheter in the bladder and lowering the position of the catheter port to discharge urine and sediment from a low position.

9. The method for using a urinary catheter with a special-shaped fixator according to claim 8, characterized in that: The following steps are also included: By controlling the amount of gas or liquid filled into the elastic chamber, the degree of bulging and bending of the special-shaped fixator can be changed.

10. The method for using a urinary catheter with a special-shaped fixator according to claim 8, characterized in that: The following steps are also included: By filling gas or liquid into different elastic chambers, the special-shaped fixator can be bent and twisted in different directions.

Images