Hysteroscope flushing tube

Abstract

The utility model relates to a hysteroscope flushing tube which comprises a flushing fluid bottle, a fluid outlet arranged at the bottom of the flushing fluid bottle, a ball float valve arranged in the flushing fluid bottle and used for controlling opening and closing of the fluid outlet and a tube body communicated with the fluid outlet, and the tube body comprises a flow stabilizing section, a flow control section and an accelerating section which are sequentially connected. The pipe diameter of the flow stabilizing section is gradually increased, and the pipe diameter of the accelerating section is gradually reduced. The pipe body adopts the three-section structural design, the pipe diameter of the flow stabilizing section is gradually increased, incoming flow disturbance is eliminated through inertia dissipation, static pressure is improved through the Bernoulli effect, and bubble precipitation is restrained. The pipe diameter of the acceleration section is gradually reduced, the outlet flow speed is increased, stable jet flow is maintained through the Venturi effect, and meanwhile high-speed jet flow is used for shearing and breaking residual bubbles. And the floating ball valve is arranged and can be automatically closed when the liquid level in the flushing liquid bottle is low, so that a gas-liquid mixed flow is effectively prevented from being formed due to the low liquid level in the flushing liquid bottle.

Description

Technical Field

[0001] This utility model belongs to the field of surgical instruments, specifically relating to a hysteroscopic irrigation tube. Background Technology

[0002] During hysteroscopic surgery, the irrigation cannula is one of the core instruments. It can be used to expand and visualize the uterine cavity, and to open the uterine cavity wall by continuously injecting irrigation fluid (such as physiological saline) to form an operating space. It can also flush the surface of the uterine cavity mucosa and remove blood, mucus and tissue debris.

[0003] However, traditional flushing tubing is prone to air ingress during flushing, mainly for two reasons: 1. When the liquid level in the flushing solution bottle is below the outlet, a gas-liquid mixture is easily formed; 2. Turbulence within the tubing during rapid flushing leads to the generation of spontaneous bubbles. Once the gas enters the uterine cavity, it forms tiny bubbles that mix with the flushing solution, causing light refraction interference. This results in snow-like noise or distortion in the endoscopic image, affecting the clarity of the field of vision and posing a certain safety threat to the patient.

[0004] Existing solutions mostly use a one-way valve structure, but they still have some problems, such as the valve body resistance affecting the flow rate of the flushing fluid or insufficient filtration efficiency for microbubbles. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a hysteroscopic irrigation tube that can effectively prevent gas from appearing in the irrigation tube and ensure the smooth progress of the operation.

[0006] The technical solution adopted in this utility model is:

[0007] A hysteroscopic irrigation tube includes an irrigation fluid bottle, an outlet located at the bottom of the irrigation fluid bottle, a float valve located inside the irrigation fluid bottle for controlling the opening and closing of the outlet, and a tube body communicating with the outlet. The tube body includes a flow stabilizing section, a flow controlling section, and an accelerating section connected in sequence. The diameter of the flow stabilizing section gradually increases, and the diameter of the accelerating section gradually decreases.

[0008] Furthermore, a cellular rectifier is provided within the current stabilization section.

[0009] Furthermore, a spiral guide channel is provided within the flow control section.

[0010] Furthermore, the spiral guide groove includes a first guide groove and a second guide groove with opposite spiral directions. The first and second guide grooves are arranged intersectingly, and their pitches are equal.

[0011] Furthermore, the inner walls of the stabilizing section, the controlling section, and the accelerating section are provided with a smooth antibacterial coating.

[0012] Furthermore, elastic silicone is provided on the outer wall of the acceleration section.

[0013] Furthermore, a spiral reinforcing rib is provided between the acceleration section and the elastic silicone.

[0014] Furthermore, a shape memory alloy mesh is coated on the outer layer of the elastic silicone.

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

[0016] This invention employs a three-section pipe design. In the stabilizing section, the pipe diameter gradually increases, eliminating inflow disturbances through inertial dissipation and utilizing the Bernoulli effect to increase static pressure and suppress bubble formation. Simultaneously, a built-in honeycomb separator in this section breaks down large-scale turbulence into micro-scale turbulence. In the flow control section, an inverted double-helix guide channel induces ordered swirling flow, converting disordered turbulent kinetic energy into directional rotational kinetic energy. The guide channel directs fluid along its direction, generating a circumferential velocity component. Fluid micro-elements migrate towards the pipe wall under centrifugal force, forming a central low-pressure zone where tiny bubbles move to the pipe center, preventing them from contacting the wall and merging. In the acceleration section, the pipe diameter gradually decreases, increasing the outlet velocity. The Venturi effect maintains a stable jet, while the high-speed jet shears and breaks up residual bubbles. A float valve is also included, automatically closing when the liquid level in the flushing fluid bottle is low, effectively preventing gas-liquid mixing due to a low liquid level. Attached Figure Description

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

[0018] Figure 2 This is a schematic diagram of the tube structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the flow control section structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the acceleration section structure of this utility model. Detailed Implementation

[0021] As attached Figure 1-4 As shown, this utility model discloses a hysteroscopic irrigation tube, including an irrigation fluid bottle 1, an outlet 2 connected to the irrigation fluid bottle 1, a tube body connected to the outlet 2, and a float valve 3 installed in the irrigation fluid bottle 1. The float valve 3 controls the opening and closing of the outlet 2. By reasonable setting, the outlet 2 is closed when the liquid level in the irrigation fluid bottle 1 drops to a distance of 2cm, so as to prevent gas from entering the outlet 2 due to the low liquid level in the irrigation fluid bottle 1 and to prevent gas-liquid mixing.

[0022] Preferably, the pipe body adopts a three-section structure design, including a flow stabilization section 4, a flow control section 5, and an acceleration section 6 connected in sequence.

[0023] The inner diameter of the pipe in the steady-flow section 4 gradually increases from 4 mm to 6 mm to reduce the liquid flow velocity. Inertial dissipation eliminates incoming flow disturbances (such as pumping pulsations and turbulence caused by pipe bends). Utilizing the Bernoulli effect, the cross-sectional area increases, reducing dynamic pressure and increasing static pressure to suppress bubble precipitation. Simultaneously, a honeycomb rectifier 7 is installed within the steady-flow section 4 to break down large-scale turbulence into micro-scale turbulence.

[0024] The flow control section 5 is a cylindrical section, and a spiral guide groove is provided on the inner wall of the flow control section 5. The spiral guide groove includes a first guide groove 8 and a second guide groove 9, which have opposite directions of rotation and are arranged crosswise. The pitch is designed to be 15mm, the groove depth is 0.3mm, the groove width is 0.5mm, and the phase difference between the two guide grooves is fixed.

[0025] The reverse double-helix flow channel achieves alternating reverse swirling flow. The left-handed and right-handed flow fields generate opposing angular momentum, mutually canceling out longitudinal rotational energy. Furthermore, the intersecting helices generate high-frequency shear force, which can break large air bubbles into clinically safe microbubbles. The reverse flow field forms local pressure nodes, suspending the microbubbles in the tube core region and preventing them from contacting the tube wall and merging. Compared to traditional single flow channels, the reverse double-helix flow channel structure of this invention achieves:

[0026] 1. Highly efficient energy conversion: converting turbulent kinetic energy into heat energy dissipation.

[0027] 2. Two-way eddy current control: Simultaneously manages axial and radial flow instabilities.

[0028] 3. Adaptive flow regime adjustment: Maintains stable flow over a wide flow rate range (50-300 ml / min).

[0029] Computational fluid dynamics simulations have verified that this method is suitable for solving the problem of spontaneous bubbles caused by turbulence in hysteroscopic irrigation tubes.

[0030] The diameter of the acceleration section 6 gradually decreases from 6mm to 3mm, which increases the outlet flow velocity and achieves high flushing force, resolving the contradiction between low energy consumption and high flushing force in traditional designs. The Venturi effect maintains a stable jet. Increased kinetic energy further reduces static pressure, suppressing bubble expansion at the outlet. The high-speed jet not only shears and breaks up residual bubbles but also enhances the flushing effect. The gradually narrowing outlet design also avoids the water hammer effect caused by sudden velocity changes at the end of traditional straight pipes.

[0031] Preferably, the inside of the tube is coated with a smooth antibacterial coating. Furthermore, an elastic silicone rubber 10 is provided on the outer wall of the acceleration section 6, and a spiral reinforcing rib 11 made of polymer material is provided between the elastic silicone rubber 10 and the outer wall of the acceleration section 6, with a shape memory alloy mesh covering its outer side. The end of the acceleration section 6 is in the operating position, often experiencing deformation or bending under stress, leading to air bubbles. The reinforced structural design reduces deformation or bending, and the design of the elastic silicone rubber 10 and shape memory alloy mesh helps the tube quickly recover its shape.

[0032] This invention addresses the issue of reducing air bubbles in the rinsing tube from two perspectives. First, it utilizes a float valve to prevent the liquid level in the rinsing fluid bottle 1 from becoming too low, thus avoiding gas-liquid mixing. Second, it improves the tube structure by intelligently segmenting the flow channel, achieving a synergistic effect of stabilizing flow, controlling bubbles, and increasing efficiency at the physical level.

[0033] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A hysteroscopic irrigation tube, characterized in that... It includes a flushing liquid bottle (1), an outlet (2) located at the bottom of the flushing liquid bottle (1), a float valve (3) located inside the flushing liquid bottle (1) for controlling the opening and closing of the outlet (2), and a pipe body connected to the outlet (2). The pipe body includes a flow stabilizing section (4), a flow controlling section (5), and an acceleration section (6) connected in sequence. The diameter of the flow stabilizing section (4) gradually increases, and the diameter of the acceleration section (6) gradually decreases.

2. The hysteroscopic irrigation tube according to claim 1, characterized in that... A cellular rectifier (7) is provided in the current stabilization section (4).

3. The hysteroscopic irrigation tube according to claim 1, characterized in that... A spiral guide groove is provided in the flow control section (5).

4. A hysteroscopic irrigation tube according to claim 3, characterized in that... The spiral guide groove includes a first guide groove (8) and a second guide groove (9) with opposite spiral directions. The first and second guide grooves are arranged in an intersecting manner and have the same pitch.

5. A hysteroscopic irrigation tube according to claim 1, characterized in that... The inner walls of the stabilizing section (4), the controlling section (5), and the accelerating section (6) are provided with a smooth antibacterial coating.

6. A hysteroscopic irrigation tube according to claim 1 or 5, characterized in that... An elastic silicone (10) is provided on the outer wall of the acceleration section (6).

7. A hysteroscopic irrigation tube according to claim 6, characterized in that... A spiral reinforcing rib (11) is provided between the acceleration section (6) and the elastic silicone (10).

8. A hysteroscopic irrigation tube according to claim 6, characterized in that... The outer layer of the elastic silicone (10) is covered with a shape memory alloy mesh.

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