Gastroscopy anti-reflux device

Abstract

A gastroscope anti-reflux device is arranged at the front of the handle end of the endoscope tube and connected to the working channel of the endoscope tube. The gastroscope anti-reflux device has an upper and lower bidirectional channel, and there are staggered reflux grooves between the upper and lower bidirectional channels. The reflux grooves are U-shaped structures, interconnecting the upper and lower channels, and the opening direction of the reflux grooves is toward the direction of the gastroscope lens. It has two staggered reflux channels, which do not produce resistance to the forward flow of liquid, and will continuously produce shunting and backtracking effects on the impact of reverse flow of liquid, blocking the fluid in the upper and lower channels from flowing under pressure, and achieving a stable and reliable anti-reflux effect.

Description

Technical Field

[0001] The invention relates to the improvement of a human endoscope, in particular to an anti-reflux device applied to a gastroscope. Background Art

[0002] With the advancement of ultra-microscopic visual technology, endoscopes have become increasingly miniaturized. In a multifunctional gastroscope, the ultra-micro lens is inserted into the human digestive tract, especially the esophagus and stomach, through a gastroscope tube. A working channel is also provided in the gastroscope tube, through which cleaning fluid can be input into the human body, and gastric juice can also be extracted through the working channel.

[0003] However, when cleaning the stomach or digestive tract, the patient's stomach may contract sharply due to pain, dry heaving, etc., causing gastric juice or bleeding to surge up along the working channel of the gastroscope, reversely contaminating or even destroying the gastroscope tube and the control handle of the gastroscope.

[0004] Most of the existing gastroscope anti-reflux technologies use an airbag anti-reflux sleeve, such as patent No. 202020505830.0 "Airbag anti-reflux sleeve for gastroscope treatment". It includes a gastroscope outer sleeve, an inflation catheter, an airbag, an inflation valve and a scale line. The gastroscope outer sleeve is a round tube with a bevel opening at the front end. An airbag is arranged on the gastroscope outer sleeve, and the airbag is connected to the inflation valve through an inflation catheter, and the inflation catheter is arranged on the outer wall of the gastroscope outer sleeve; when the gastroscope outer sleeve is inserted into the esophagus along the gastroscope, the airbag is inflated through the inflation catheter to expand the airbag to block the cavity between the sleeve and the esophageal wall.

[0005] The inflation valve is composed of a valve body, a valve core, and a spring. The valve body is cylindrical, and a two-stage raised annular convex ring is arranged on the inner wall of the valve body. The valve core is arranged in the upper convex ring, and a spring is arranged between the valve core and the second-stage convex ring of the valve body. When the inflation valve is deflated, the valve core is pressed inward, and the valve core moves to discharge the gas.

[0006] The above solution is to establish an isolation layer between the gastroscope outer tube and the esophagus by inflating the air bag, so as to prevent gastric juice or blood from gushing out of the gap between the esophagus and the gastroscope outer tube. There is no effective anti-reflux protection for the working channel of the gastroscope tube itself.

[0007] Currently, anti-reflux protection is mostly composed of a pressure valve and a one-way valve structure. Since the action structure of the valve group, such as the valve ball or valve cover, spring, etc., will affect the flow cross-sectional area of ​​the channel, and the valve group structure is easily blocked by undigested matter flowing out of the stomach, affecting the switching state of the valve group structure, the anti-reflux structure of the valve group structure is not suitable for the working channel of the gastroscope.

[0008] Moreover, the ordinary anti-reflux valve group will completely block the backflow. If the working pipeline of the gastroscope is used for negative pressure suction, such as extracting gastric juice, the anti-reflux valve group is not suitable for use in such scenarios. Summary of the invention

[0009] The technical problem to be solved by the present invention is to provide a device without an action structure for protecting the working channel of a gastroscope tube from reflux, which can allow the working channel to pass in the forward direction, weaken and block the surging flow in the reverse direction, and prevent the surging material from retrogradely contaminating the control handle end.

[0010] The technical solution adopted by the present invention to solve the above-mentioned problem is: a gastroscope anti-reflux device, which is arranged at the front part of the handle end of the endoscope tube and is connected to the working channel of the endoscope tube, and is characterized in that: the gastroscope anti-reflux device has an upper and lower bidirectional channel, and there are reflux grooves arranged alternately between the upper and lower bidirectional channels. The reflux grooves are of U-shaped structure, interconnecting the upper and lower channels, and the opening direction of the reflux grooves is toward the direction of the gastroscope lens.

[0011] An intersection area is arranged at the outlet of the reflux groove.

[0012] A coarse-pore screen is arranged between the anti-reflux device and the gastroscope working tube.

[0013] The advantages of the present invention are: it is a fixed structure, an anti-backflow device without an action switch device. In the downstream state, the fluid mainly flows through the upper and lower channels, and the U-shaped channel is in the reverse direction, which only has permeation pressure and does not affect the flow of the fluid. When a large amount of backflow occurs, the reverse-flowing fluid continuously passes through the bifurcation of the upper and lower main channels and the U-shaped groove, and continuously diverts, reducing the surge pressure. The U-shaped grooves are interconnected, and a part of the fluid in the upper channel blocks the outflow of the lower channel after passing through the U-shaped groove. Similarly, the fluid in the lower channel forms a flow barrier to the fluid in the upper channel after passing through the U-shaped groove. Under multiple blocking and diversion, the fluid pressure in the upper and lower channels will be significantly reduced, which greatly reduces the outflow of reverse surge, and can provide anti-impact protection for subsequent control handles and even peripheral equipment.

[0014] For continuous reverse flow, such as suction through the gastroscope tube, the U-shaped groove will be filled with fluid until the pressure is balanced with the upper and lower channels. Then the U-shaped groove will hardly block the reverse flow of the fluid and it can still flow out of the working pipeline. Therefore, it will not affect continuous suction, such as suction of gastric juice. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 : Structural diagram of the anti-reflux device of the gastroscope.

[0016] Figure 2 : Diagram of the internal structure of the anti-reverse device.

[0017] Figure 3 : Working process diagram in downstream state.

[0018] Figure 4 : Diagram of the working process under countercurrent state.

[0019] 1 is the handle of the endoscope tube, 2 is the coarse-mesh screen, 3 is the anti-reverse device, 31 is the upper channel wall, 32 is the lower channel wall, 33 is the reflux groove, 34 is the intersection area, 35 is the outer wall, 36 is the main channel, and 37 is the reflux channel. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0021] The present invention is an anti-reflux device applied to a gastroscope, which has the function of reducing the surge pressure during reflux when a sudden reflux pressure rises, and reducing the possibility of the surge overflowing to the gastroscope control handle. At the same time, it does not block the downstream flow from the handle to the gastroscope lens, nor does it block the continuous and stable reflux input, so it can be used in the working occasion of continuous negative pressure suction, suitable for use in occasions such as extracting gastric juice.

[0022] like Figure 1 As shown, it is installed between the handle and the working channel of the gastroscope. It is preferably arranged at the front of the handle end of the endoscope tube and connected to the working channel of the endoscope tube. The anti-reflux device of the gastroscope has an upper and lower bidirectional channel, which is formed by diversion at the control handle end of the gastroscope. After passing through the anti-reflux device, the flow is merged again and communicated with the working channel of the gastroscope.

[0023] The inventive point of the present invention is that a staggered multi-layer reflux groove is arranged between the upper and lower bidirectional channels. The reflux groove is a U-shaped structure, interconnecting the upper and lower channels, and the outlet direction of the reflux groove is toward the direction of the lens of the gastroscope. The reflux groove part constitutes the reflux channel 37, and the upper and lower parts that are not affected by the upper channel wall and the lower channel wall constitute the main channel 36. The purpose of setting the U-shaped reflux groove is to reverse the fluid in one channel into the other channel after reversing, forming a hedging structure for the fluid in the other channel, thereby blocking the flow of fluid on the other side. In the case of a sudden increase in reflux pressure, the sudden increase in reflux pressure will significantly hinder the flow of fluid in the upper and lower main channels after diversion and hedging, and significantly reduce the fluid pressure in the main channel.

[0024] The outlet direction of the U-shaped groove is provided with an intersection area. An intersection area will be formed at the intersection area. The advantage of this design is that a larger area is used to block the reverse fluid in the main channel. After the reverse fluid passes through the U-shaped tube, the main channel suddenly widens, which can reduce the flow pressure. Then it enters the fork again, and a part of the reverse fluid is sent back to the other side through the next level of U-shaped groove.

[0025] A coarse-mesh screen is arranged between the anti-reflux device and the gastroscope working tube, and the coarse-mesh screen is mainly used to prevent large solid particles in the digestive tract from entering the upper and lower channels, thereby causing blockage of the upper and lower main channels.

[0026] The invention has a simple structure and is easy to process. It can be formed by merging two channels, is suitable for mass production, and can be installed as an optional device for gastroscopes. It is also an effective anti-reflux device. It was originally designed for anti-reflux of gastroscopes, but is not limited to gastroscopes. It can also be used in other fluid occasions with similar requirements, including gas, liquid, and small particle solid and liquid mixture occasions.

Claims

1. A gastroscope anti-reflux device, arranged at the front of the handle end of the endoscope tube and connected to the working channel of the endoscope tube, characterized in that: The anti-reflux device of the gastroscope has an upper and lower bidirectional channel, and a staggered reflux groove is arranged between the upper and lower bidirectional channels. The reflux groove is a U-shaped structure, and the reflux groove is used to connect the upper and lower channels. The opening direction of the reflux groove is toward the lens direction of the gastroscope. The reflux groove includes an upper channel wall and a lower channel wall. A reflux channel is formed between the upper channel wall and the lower channel wall, and the upper and lower parts that are not affected by the upper channel wall and the lower channel wall constitute the main channel.

2. The anti-reflux device for gastroscope according to claim 1, characterized in that: An intersection area is arranged at the outlet of the reflux groove.

3. The anti-reflux device for gastroscope according to claim 1, characterized in that: A coarse-pore screen is arranged between the anti-reflux device and the gastroscope working tube.

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