Urethral sphincter simulation device for leak-proof test of catheter

Abstract

The utility model discloses a urethral sphincter simulation device for a leakage-proof test of a catheter, which comprises a liquid storage bag, a liquid outlet, a liquid outlet and a liquid outlet, the sphincter simulation assembly comprises a base tube connected with the liquid outlet and triangular notches symmetrically formed in the bottom end of the base tube; the top tube wall of the urethra simulation tube is provided with a longitudinal expansion seam and is nested in the inner cavity of the base tube; the traction rope is connected to the top of the liquid storage bag, and the bottom end of the traction rope is movably stretched up and down on the periphery of the base tube. The liquid leakage condition of the catheter is simulated in a sphincter diastolic state, so that the liquid leakage condition is visualized, the detection effect and the repeated utilization rate are improved, and meanwhile, the processing cost is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical model technical field, concretely relates to a urethral sphincter simulation device for catheter leakage prevention test. BACKGROUND

[0002] At present, catheter leakage prevention performance test mainly relies on two methods, static water pressure test: the catheter is placed in the water tank and pressurized, and the leakage condition is observed. This method cannot simulate the dynamic pressure fluctuation of human bladder (such as pressure impact when coughing and exercising), and the test environment is quite different from the real physiological condition; Electronic press test: the pressure change is simulated by a motor-driven piston, but the equipment is expensive, and the mechanical structure is not matched with the mechanical response of human soft tissue, resulting in increased test error.

[0003] Therefore, a low-cost, high-simulation urethral sphincter simulation device for catheter leakage prevention test is proposed. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of urethral sphincter simulation devices for catheter leakage prevention test, simulate human bladder by liquid storage bag, simulate sphincter by base pipe, and urethral simulation tube, detect the leakage prevention performance of catheter under the scene of sphincter contraction and expansion, solve the problems in the prior art.

[0005] To solve the above technical problems, the utility model adopts the following scheme:

[0006] A urethral sphincter simulation device for catheter leakage prevention test includes: a liquid storage bag with a liquid outlet at the bottom; a sphincter simulation assembly including a base pipe connected to the liquid outlet and a triangular notch symmetrically opened at the bottom end of the base pipe; a urethral simulation tube with a longitudinal expansion seam at the top wall and nested in the inner cavity of the base pipe; a pull rope connected to the top of the liquid storage bag, with the bottom end moving up and down to stretch outside the base pipe.

[0007] Further, the outer periphery of the base pipe is provided with an adjusting ring for penetrating the pull rope.

[0008] Further, the horizontal included angle of two sides of the triangular notch is 30-60 °.

[0009] Further, the base pipe is internally screwed at the liquid outlet.

[0010] Further, the wall thickness of the urethral simulation tube is 0.1-10 mm, and the tube length is 1-25 cm.

[0011] Further, the top of the liquid storage bag is respectively provided with a liquid injection port and a hanging rope.

[0012] Furthermore, the adjusting ring is fixed to the outer circumferential surface of the base tube by adhesive bonding.

[0013] Furthermore, the base tube is made of latex, and the catheter is made of latex, silicone, or PVC.

[0014] Furthermore, the pulling rope is made of nylon.

[0015] The beneficial effects of this utility model are:

[0016] This invention uses a reservoir bag to simulate the human bladder, a base tube to simulate the sphincter, and a urethra to simulate a tube. The stretching and relaxing of the traction rope applies pressure to the reservoir bag, simulating the contraction and expansion states of the sphincter and urethra. The catheter is then passed through the interior of the simulated urethra tube, simulating leakage of the catheter when the sphincter is relaxed. This makes the leakage situation visible, improves the detection effect and reusability, and has low processing cost. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This utility model Figure 1 A magnified schematic diagram of the structure of circle A in the middle;

[0019] Figure 3 This is a schematic diagram of the assembly structure of the urinary catheter inside the reservoir bag.

[0020] Reference numerals: 1-Reservoir bag, 10-Injection port, 11-Drainage port, 12-Hanging rope, 2-Sphincter simulation component, 20-Base tube, 200-Triangular incision, 21-Adjusting ring, 3-Urethra simulation tube, 30-Dilution suture, 4-Tethering rope, 5-Catheter, 50-Catheter hole, 51-Balloon. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0022] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Example 1

[0025] Embodiment 1 of this utility model is a urethral sphincter simulation device for leak-proof testing of a urinary catheter 5, comprising: a reservoir bag 1 with a drain port 11 at its bottom; a sphincter simulation component 2, including a base tube 20 connected to the drain port 11 and triangular incisions 200 symmetrically opened at the bottom end of the base tube 20; a urethral simulation tube 3 with a longitudinal expansion slit 30 on its top wall and nested in the inner cavity of the base tube 20; and a traction rope 4 connected to the top of the reservoir bag 1, the bottom end of which moves up and down around the outer periphery of the base tube 20.

[0026] In this application, reference is made to Figure 1 and Figure 2 The system uses a reservoir bag 1, a sphincter simulation component 2, and a urethral simulation tube 3 to simulate the human bladder, sphincter, and urethra, respectively. The urethral simulation tube 3 is inserted into the sphincter, and the expansion slit 30 longitudinally opened on its wall and the triangular incision 200 at the bottom of the base tube 20 simulate the contraction and relaxation of the sphincter and urethra, respectively, when the traction rope 4 is tightened and relaxed. This allows the catheter 5 to be inserted into the urethral simulation tube 3, with the catheter port 50 and balloon 51 at its tip inserted into the interior of the urethral simulation tube 3. Simultaneously, the balloon 51 blocks the drainage port 11. Water is injected into the reservoir bag 1 to simulate the leak-proof performance of the catheter 5. This system is easy to manufacture, low in cost, and can be used multiple times.

[0027] Specifically, an adjusting ring 21 for the pull rope 4 to pass through is provided on the outer periphery of the base tube 20. One end of the pull rope 4 is fixed to the top of the reservoir bag 1, and the other end passes through the adjusting ring 21. When the rope 4 is pulled downwards by hand, it creates pressure on the reservoir bag 1, causing the base tube 20 and the urethral simulation tube 3 at the bottom of the reservoir bag 1 to contract. This simulates the pressure exerted by the human bladder on the sphincter and urethra, thereby causing the sphincter and urethra to enter a contracted state. This facilitates leakage testing of the catheter 5 in both states, improving testing accuracy.

[0028] In some preferred embodiments, the included horizontal angle between the two sides of the triangular incision 200 is 30° to 60°. There are two symmetrical triangular incisions 200 here, which simulate the contraction and relaxation states of the sphincter muscle. The specific angles can be set according to actual conditions and are not listed here, ensuring that the contraction and relaxation states of the sphincter muscle can be simulated.

[0029] Furthermore, the base tube 20 is internally threaded into the drain port 11. This threaded connection ensures the sealing of the assembly and facilitates the detachable connection of the base tube 20 at the drain port 11, thereby increasing the stability of the installation.

[0030] Furthermore, the wall thickness of the urethral simulation tube 3 is 0.1mm to 10mm, and the tube length is 1 to 25cm. The thickness of the tube can be set according to the actual situation.

[0031] In some preferred embodiments, the top of the liquid storage bag 1 is provided with an injection port 10 and a hanging rope 12. The injection port 10 is mainly used to introduce water into the liquid storage bag 1 to facilitate the simulation of the bladder; the hanging rope 12 is mainly used to fix the entire simulation device in a certain position without the need for hand fixation of the liquid storage bag 1, and at the same time facilitates the stretching and loosening of the traction rope 4.

[0032] Specifically, the adjusting ring 21 is fixed to the outer circumference of the base tube 20 by adhesive. Adhesive or other methods can be used for adhesive bonding to ensure that the pulling rope 4 can be stretched and relaxed around the outer circumference of the base tube 20.

[0033] To improve simulation accuracy, the base tube 20 is made of latex, and the catheter 5 is made of latex, silicone, or PVC. Latex, silicone, or PVC materials can accurately simulate the nonlinear deformation characteristics of the urethra under pressure; support high-frequency, repeatable, and accurate testing; and facilitate the creation of the dilation suture 30 without the need for additional equipment.

[0034] Optionally, the pull rope 4 is made of nylon. The length of the pull rope 4 can be set according to actual needs, and the top end of the pull rope 4 is also fixed to the top of the liquid storage bag 1 by adhesive.

[0035] When using this utility model, in conjunction with Figure 3As shown, the base tube 20 and the urethral simulation tube 3 are pre-assembled at the drainage port 11. The catheter 5 is then inserted into the storage bag 1 of the simulation device through the urethral simulation tube 3. The balloon 51 of the catheter 5 is inflated with purified water to its nominal volume. The base tube 20, simulating the sphincter, is pulled down and tightened using the traction rope 4. The catheter 5 is then clamped, and 500ml of purified water is precisely measured using a graduated cylinder and introduced into the storage bag 1 through the injection port 10. The clamp is opened to drain the purified water until no further drainage occurs, and the liquid in the storage bag 1 is observed to ensure it is empty. Then, the traction rope 4 is released to simulate sphincter relaxation, and leakage is observed and recorded. This method enables the testing of the leak-proof performance of the catheter 5 under sphincter contraction and expansion scenarios, improving testing effectiveness and reusability.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments based on the technical essence of the present utility model and within the spirit and principles of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A urinary sphincter simulation device for leak testing of a urinary catheter, characterized in that, The application relates to a urinary catheter, which comprises a liquid storage bag (1) provided with a liquid outlet (11) at the bottom, a sphincter muscle simulation assembly (2) comprising a base pipe (20) connected with the liquid outlet (11) and a triangular cutout (200) symmetrically arranged at the bottom end of the base pipe (20), and a urethral simulation pipe (3) provided with a longitudinal expansion slit (30) at the top wall and nested in the inner cavity of the base pipe (20). The outer periphery of the base pipe (20) is provided with an adjusting ring (21) for penetrating the pulling rope (4).

2. The urinary sphincter analog for leak testing a urinary catheter of claim 1, wherein, The horizontal included angle of two sides of the triangular cutout (200) is 30-60 degrees.

3. The urinary sphincter analog device for leak testing a urinary catheter of claim 1, wherein, The base pipe (20) is internally screwed at the liquid outlet (11).

4. The urinary sphincter analog device for leak testing a urinary catheter of claim 1, wherein, The pipe wall thickness of the urethral simulation pipe (3) is 0.1-10 mm, and the pipe length is 1-25 cm.

5. The urinary sphincter analog device for leak testing a urinary catheter of claim 1, wherein, The top of the liquid storage bag (1) is provided with a liquid injection port (10) and a hanging rope (12).

6. The urinary sphincter analog for leak testing a urinary catheter of claim 1, wherein, The adjusting ring (21) is fixed to the outer periphery of the base pipe (20) by means of gluing.

7. The urinary sphincter analog device for leak testing a urinary catheter of claim 2, wherein, The base pipe (20) is made of latex material, and the urinary catheter (5) is made of latex, silicon or PVC material.

8. The urinary sphincter simulation device for leak testing a urinary catheter of claim 2, wherein, The pulling rope (4) is made of nylon material.

9. The urinary sphincter simulation device for leak testing a urinary catheter of claim 2, wherein, ​

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