A gastric lavage device for pesticide poisoning

Abstract

The application discloses a gastric lavage device used after pesticide poisoning and relates to the technical field of medical machinery, which comprises a gastric tube, a flushing pipe and a suction pipe which are coaxially arranged, a tip arranged at the top end of the suction pipe, a miniature camera arranged on the tip, and an arc surface arranged on the sidewall of the suction pipe and corresponding to a liquid outlet arranged on the flushing pipe so that the liquid outlet is directed to the arc surface. The gastric lavage device can adjust the flushing pressure steplessly from weak to strong, overcomes the technical defects of traditional gastric lavage devices which can only change the flushing strength by adjusting the pump pressure, medical staff can adjust the extension of the suction pipe in real time according to the gastric conditions observed by the camera, and select appropriate flushing modes, so that the gastric lavage device can not only avoid the stimulation of high-pressure flushing to patients when the tube is initially inserted, but also provide sufficient flushing force when wall-attached residues need to be cleaned.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically to a gastric lavage device for pesticide poisoning. Background Technology

[0002] Gastric lavage is a crucial emergency treatment for patients suffering from oral pesticide poisoning. Precise lavage techniques are essential for the efficient removal of toxins from the stomach. However, existing gastric lavage devices suffer from significant structural design flaws that negatively impact lavage effectiveness and operational adaptability. While existing visual gastric lavage tubes feature cameras at the tube end for real-time observation of the stomach, the lavage port and camera are relatively fixed. The spray direction and angle of the lavage port are pre-designed within the tube, making dynamic adjustments based on the camera's feedback regarding the actual stomach conditions difficult. Furthermore, traditional gastric lavage devices can only adjust the lavage force by regulating pump pressure, making it difficult to flexibly adapt the lavage intensity through structural adjustments. This makes it challenging to achieve gentle lavage in the initial stages of insertion to avoid irritating the stomach wall, and also makes it difficult to specifically increase the lavage force when clearing debris from the stomach wall. Consequently, the comfort and cleaning efficiency of the gastric lavage procedure cannot be balanced. Summary of the Invention

[0003] The purpose of this invention is to provide a gastric lavage device for pesticide poisoning, in order to solve the above-mentioned problems.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a gastric lavage device for pesticide poisoning, comprising a gastric tube; The gastric tube includes a flushing tube and a suction tube coaxially nested together, and the suction tube can slide axially relative to the flushing tube. The end is located at the top of the suction tube and is equipped with a miniature camera for real-time observation of the stomach. A direction adjustment mechanism is located between the suction tube and the end head and is used to adjust the bending direction of the end head; An arc-shaped surface is provided on the side wall of the suction tube and corresponds to the liquid outlet opened on the flushing tube; The direction adjustment mechanism adjusts the bending direction of the end to make the arc-shaped surface change its orientation synchronously with the suction tube, and makes the flushing liquid sprayed from the outlet reflect off the arc-shaped surface and then be directed toward the working area; the suction tube slides axially to change the relative position of the arc-shaped surface and the outlet, so as to adjust the scattering angle and spray force of the flushing liquid.

[0005] Preferably, the direction adjustment mechanism includes a plurality of pull ropes disposed inside the suction tube for adjusting the direction of the end.

[0006] Preferably, the suction tube includes an inner wall tube, and a fixing rib is provided between the inner wall tube and the outer wall of the suction tube to form a channel for accommodating the pull rope.

[0007] Preferably, the end has an internal cavity, and the cavity is covered with a movable membrane, through which the pull rope passes and is connected to the end.

[0008] Preferably, the inner wall tube is provided with a thin film assembly for diluting the liquid into the suction tube when the suction tube is blocked.

[0009] Preferably, the film assembly includes two symmetrically arranged abutting portions, and the adjacent ends of the two abutting portions are provided with abutting surfaces and abut against each other and seal under normal conditions; A notch is provided at the connection between the back side of the abutment and the inner wall tube. The notch is used to guide the abutment to bend towards the axis of the suction tube under the action of pressure difference.

[0010] Preferably, the suction tube has at least one suction port radially provided, and the suction port changes its spatial position as the suction tube slides axially and the end bends.

[0011] Preferably, the angle between the axis of the suction port and the axis of the suction tube is acute, so that when the suction tube is filled with liquid for dilution, the direction of the flushing liquid sprayed out of the suction port is away from the end.

[0012] Preferably, a blade is fixedly provided near the suction port, and the position of the blade corresponds to the position of the pull rope, so that the blade can be driven when the pull rope is pulled.

[0013] Preferably, the outer wall of the suction tube is provided with an outer seal, and the inner wall of the flushing tube is provided with a corresponding inner seal.

[0014] In the above technical solution, the gastric lavage device provided by the present invention for pesticide poisoning has the following beneficial effects: The present invention achieves continuous change in the relative position of the outlet and the arc-shaped surface by axially sliding the suction tube, thus adjusting the lavage pressure from reflected scattering to direct spraying. Compared with the pump-based adjustment method in the prior art, this avoids excessive stimulation of the gastric wall. Furthermore, the direction adjustment mechanism allows the arc-shaped surface to rotate synchronously with the end, ensuring that the field of view is consistent with the lavage direction, avoiding the defect of conventional viewing lenses being disconnected from operation, making the gastric lavage process more precise and efficient. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 This is an overall three-dimensional schematic diagram provided for an embodiment of the present invention; Figure 2 This is a schematic diagram of the end side section provided in an embodiment of the present invention; Figure 3 This is a cross-sectional schematic diagram of the suction tube and flushing tube provided in an embodiment of the present invention; Figure 4 An overall side view provided for an embodiment of the present invention; Figure 5 This is a schematic diagram of the inner wall tube structure provided in an embodiment of the present invention; Figure 6 A cross-sectional schematic diagram provided for an embodiment of the present invention; Figure 7 This is a structural diagram of the first position during the end-head movement process provided in an embodiment of the present invention; Figure 8 This is a structural schematic diagram of the second position during the end-head movement process provided in an embodiment of the present invention; Figure 9 Provided for embodiments of the present invention Figure 4 Enlarged schematic diagram of structure A in the middle; Figure 10 Provided for embodiments of the present invention Figure 7 Enlarged schematic diagram of the B-structure.

[0017] Explanation of reference numerals in the attached figures: 100. End cap; 101. Blade; 110. Miniature camera; 120. Movable diaphragm; 200. Flushing pipe; 210. Adaptor pipe; 220. Connecting pipe; 230. Pull ring; 231. Pull rope; 232. Connection point; 240. Liquid outlet; 250. Inner wall pipe; 251. Inner seal; 252. Membrane assembly; 2521. Abutting part; 2522. Abutting surface; 2523. Notch; 260. Fixing rib; 270. Restricting part; 300, suction tube; 301, protrusion; 302, external seal; 310, suction port; 320, internal window; 330, curved surface. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0019] like Figure 1-9 As shown, a gastric lavage device for pesticide poisoning includes a gastric tube; The gastric tube includes an irrigation tube 200 and a suction tube 300 coaxially nested together, and the suction tube 300 can slide axially relative to the irrigation tube 200. The end 100 is located at the top of the suction tube 300, and a miniature camera 110 for real-time observation of the stomach is provided on the end 100. A direction adjustment mechanism is provided between the suction tube 300 and the end 100 and is used to adjust the bending direction of the end 100. The arc-shaped surface 330 is disposed on the side wall of the suction tube 300 and corresponds to the liquid outlet 240 opened on the flushing tube 200. The direction adjustment mechanism adjusts the bending direction of the end 100 so that the arc-shaped surface 330 changes its orientation synchronously with the suction pipe 300, and so that the flushing liquid sprayed from the outlet 240 is reflected by the arc-shaped surface 330 and then directed towards the working area; the suction pipe 300 slides axially to change the relative position of the arc-shaped surface 330 and the outlet 240, thereby adjusting the scattering angle and spray force of the flushing liquid.

[0020] Specifically, the tail end of the flushing tube 200 is connected to a connecting tube 220 via an adapter tube 210. The connecting tube 220 is used to connect to the inlet of the automatic gastric lavage machine, and the tail end of the suction tube 300 is used to connect to the outlet of the automatic gastric lavage machine. The above connection method is a conventional technical means for those skilled in the art and will not be described in detail here. Furthermore, a protrusion 301 is fixedly provided on the suction tube 300, and a corresponding limiting part 270 is opened in the inner wall tube 250 to limit the extension length of the suction tube 300 (e.g., Figure 2 (As shown).

[0021] Both the suction tube 300 and the flushing tube 200 are made of fluorosilicone rubber or perfluoroether rubber. These materials have excellent resistance to organophosphorus pesticides, and their swelling rate is extremely low (<3%) in strong acid, strong alkali and organic solvent environments, while maintaining good flexibility and allowing for a 100° bend at the end. Fluorosilicone rubber also has good hydrophobicity, which can reduce the adhesion of mucus.

[0022] Furthermore, the rinsing tube 200 is fitted over the suction tube 300, forming two independent channels. The outer rinsing tube 200 is used to deliver the rinsing solution into the stomach, while the inner suction tube 300 is used to remove the stomach contents. A tip 100 is provided at the top of the suction tube 300, and a miniature camera 110 is integrated on the tip 100, allowing real-time observation of the stomach contents during insertion and gastric lavage. Additionally, there is a distance between the port of the suction tube 300 and the outlet 240, ensuring that the rinsing solution, after being reflected or directly incident on the curved surface 330, can fully rinsing the stomach wall area before being drawn away by the suction port 310. This effectively prevents the rinsing solution from being directly sucked into the suction port 310 without sufficient action, improving the efficiency of gastric lavage and the utilization rate of the rinsing solution.

[0023] The cross-sectional width of the outlet 240 extends axially along the flushing pipe (200), and the height narrows radially along the flushing pipe 200 (e.g., Figure 7 and 8As shown, a guide slope is provided on the inner side of the outlet 240 (near the cavity of the flushing tube 300). The angle between this slope and the axis of the outlet is 10°. The intersection of the extended axis of the outlet 240 and the arc-shaped surface 330 is located in the region slightly below the geometric center of the arc-shaped surface 330 when the suction tube 300 is in the initial position, specifically at 1 / 5 to 1 / 6 of the axial length of the arc-shaped surface. This allows the portion of the arc-shaped surface below the impact point to guide the reflected liquid flow to scatter towards the distal end. The portion of the arc-shaped surface above the impact point and the outlet 240 of the flushing tube 200 form an annular enclosed space, guiding the liquid flow to scatter outward along the gap between the end 100 and the outlet 240, entering the stomach in a scattering manner to create a gentle flushing effect.

[0024] During the end extension process: Extending 3-4 mm (initial transition section): The impact point moves to the middle of the arc surface. At this time, part of the flushing liquid is reflected and scattered by the arc surface, and part escapes directly from the edge of the arc surface, forming a mixed flushing. The flushing force is stronger than that at the initial position.

[0025] Extended by 5-7 mm (enhanced flushing section): The impact point is close to the far edge of the arc-shaped surface, the reflection ratio is significantly reduced, the direct spray ratio is dominant, and the flushing fluid is sprayed onto the stomach wall in a semi-focused manner, which can effectively flush away the residue attached to the wall.

[0026] Extending 7-9 mm (completely direct spray section): The impact point moves out of the arc-shaped surface range, and the flushing fluid is no longer guided by the reflection of the arc-shaped surface. It is sprayed directly onto the stomach wall from the outlet in a direct spray manner, forming a focused and powerful flush. At the same time, due to the forward movement of the suction tube 300, the suction port 310 also moves forward, allowing the direct flushing fluid to effectively clean the area around the suction port, further enhancing the anti-clogging effect.

[0027] When the suction tube 300 is extended to its longest position (approximately 8-9 mm), the outlet 240 is fully exposed in front of the arc-shaped surface 330, and the rinsing fluid is injected directly into the stomach wall with maximum force.

[0028] The configuration and model of the miniature camera 110 can refer to the miniature camera 110 used in interventional surgery, such as the 0.46mm² of amsNanEyeXS or the 1.2mm diameter of Medigus. It can be integrated into the end 100 of the suction tube 300 without significantly increasing the outer diameter of the gastric tube and without affecting the patient's swallowing and intubation.

[0029] In the aforementioned technology, the relative position of the outlet 240 and the arc-shaped surface 330 continuously changes by axially sliding the suction tube 300, thereby adjusting the flushing pressure from reflected scattering to direct jetting. Compared to the pumping adjustment method in existing technologies, this avoids excessive stimulation of the gastric wall. Furthermore, the direction adjustment mechanism causes the arc-shaped surface 330 to rotate synchronously with the end cap 100, ensuring that the field of view is consistent with the flushing direction. This avoids the defect of conventional viewing lenses being disconnected from operation, making the gastric lavage process more precise and efficient.

[0030] As a further embodiment of the present invention, the direction adjustment mechanism includes a plurality of pull ropes 231 disposed within the suction tube 300 and used to adjust the direction of the end 100.

[0031] Specifically, one end of the pull cord 231 is connected to the end 100, while the other end extends outside the patient's body and is connected to a pull ring 230. This layout prevents the pull cord 231 from drifting aimlessly within the suction tube 300, interfering with the suction flow, and also prevents direct contact between the pull cord 231 and the gastric contents, thus avoiding contamination or entanglement. Medical staff can precisely control the bending direction of the end 100 by pulling the pull ring 230 in different positions, and achieve precise guidance with real-time observation from the miniature camera 110. Compared to the existing technology that adds a traction wire to the outside of the gastric tube, the built-in pull cord layout in this embodiment is simpler and safer, does not increase the outer diameter of the gastric tube, and is beneficial for the patient's swallowing and intubation.

[0032] As a further embodiment of the present invention, the suction tube 300 includes an inner wall tube 250, and a fixing rib 260 is provided between the inner wall tube 250 and the outer wall of the suction tube 300 to form a channel for accommodating the pull rope 231.

[0033] Specifically, the power supply and signal lines of the miniature camera 110 are integrated on the outside of the pull rope 231, extending along the axial channel of the fixing rib 260 to the outside of the patient, and connected to the external display and power supply equipment. The power supply voltage is 3.3V, and the signal transmission is a high-definition digital signal, realizing the real-time transmission of the gastric image.

[0034] This double-walled, radially reinforced structure enhances the overall structural strength of the suction tube 300, making it less prone to twisting and deformation during axial sliding and bending. Furthermore, the axial channel formed between the fixing ribs 260 can serve as space for the pull rope 231 or other control elements, achieving an integrated structural and functional design. Compared to traditional single-walled suction tubes, this embodiment provides superior bending strength and operational stability while ensuring sufficient suction channel cross-sectional area, ensuring smooth movement of the suction tube 300 during its extension and sliding process.

[0035] As a further embodiment of the present invention, the end 100 has a cavity inside, and the cavity is covered with a movable membrane 120. The pull rope 231 passes through the cavity and is connected to the end 100.

[0036] Specifically, the movable membrane 120 is made of flexible medical polymer material. Four pull ropes 231 pass through the cavity from four directions and are connected to points 232 on the side wall of the end 100, thus securing the membrane. When medical personnel pull the pull ring 230 in a certain direction, the corresponding pull rope 231 is tightened, causing the end 100 to bend in that direction. Simultaneously, the structural design of the cavity and the movable membrane 120 makes the bending of the end 100 more flexible and smooth. The flexible deformation of the movable membrane 120 avoids stress concentration and extends its service life. The arrangement of the four pull ropes 231 enables omnidirectional bending adjustment of the end 100 in three-dimensional space. Combined with the miniature camera 110, medical personnel can precisely guide the end 100 to any part of the stomach that needs observation or rinsing, greatly improving the accuracy of gastric lavage procedures.

[0037] As a further embodiment of the present invention, the inner wall tube 250 is provided with a thin film assembly 252 for diluting the liquid into the suction tube 300 when the suction tube 300 is blocked.

[0038] Specifically, the inner wall tube 250 is provided with an inner opening 320 for accommodating the membrane assembly 252. The membrane assembly 252 includes two symmetrically arranged abutment portions 2521. The adjacent ends of the two abutment portions 2521 are provided with abutting surfaces 2522 and abut against each other and seal under normal conditions. The notch 2523 is used to guide the abutment portions 2521 to bend towards the axis of the suction tube 300 under the action of pressure difference.

[0039] During normal gastric lavage, a certain negative pressure (approximately -20 to -40 kPa) is maintained within the suction tube 300 to continuously aspirate gastric contents. At this time, the flushing tube 200 is under positive pressure (approximately +10 to +30 kPa) to continuously deliver flushing fluid into the stomach. Under the suction effect of the negative pressure on the suction tube side, the two contact parts 2521 are tightly fitted together, forming a reliable mechanical seal. The flushing tube 200 and the suction tube 300 are completely isolated, and the flushing fluid can only enter the stomach through the outlet 240, ensuring the efficiency of gastric lavage.

[0040] When the suction tube 300 is blocked by stomach contents, the pressure at the front end of the blockage (near the stomach end) rises back to the basic pressure in the stomach (approximately 0 to +0.5 kPa). At the rear end of the blockage (near the negative pressure source end): the negative pressure source continues to work, gradually evacuating the liquid in this section, causing the pressure to drop sharply (down to below -80 kPa). Since the membrane assembly 252 is located behind the blockage point, the pressure on its suction tube 300 side drops rapidly. At this time, a significant pressure difference is formed on both sides of the membrane assembly 252. The pressure on the suction tube 300 side is an extremely low negative pressure (below -80 kPa), while the pressure on the flushing tube 200 side is a stable positive pressure (+10 to +30 kPa). The direction of the pressure difference is that the pressure on the flushing tube 200 side >> the pressure on the suction tube 300 side. This pressure difference acts on the two contact parts 2521. The design of the notch 2523 makes the root of the contact part 2521 the weakest stress concentration point.

[0041] Under the action of pressure difference, the two abutting parts 2521 bend along the notch 2523 toward the axis of the suction tube 300, causing the two abutting surfaces 2522 to gradually separate, and the membrane module 252 changes from a closed state to an open state. The flushing liquid in the flushing tube 200 is diverted into the suction tube 300 through the opened inner window 320.

[0042] At this time, when the blockage is in front of the membrane assembly 252 (near the stomach end), the flushing fluid impacts the blockage from the rear, loosening it and flushing it back into the stomach. Since the amount of flushing fluid is small (only a diversion portion), it does not cause a sudden increase in stomach pressure, and impacting from the rear is more effective than pushing from the front.

[0043] When the blockage is located after the membrane module 252 (near the negative pressure source), the flushing fluid directly mixes with the blockage, diluting its concentration and making it a flowable liquid before being drawn away by the negative pressure. Dilution and suction occur simultaneously, allowing the blockage to be diluted and removed as it is removed, thus improving efficiency.

[0044] Once the obstruction is cleared, the suction tube 300 becomes unobstructed, the negative pressure is re-established (reduced to -20 to -40 kPa), the pressure difference across the membrane assembly 252 disappears (the negative pressure on the suction tube 300 side is re-established), and the two contact parts 2521, relying on their own elasticity, spring back to their original position along the notch 2523. The contact surfaces 2522 re-adhere, the membrane assembly 252 closes, the flushing tube 200 and the suction tube 300 are restored to isolation, and the gastric lavage process automatically resumes normal operation.

[0045] As a further embodiment of the present invention, at least one suction port 310 is radially provided on the suction tube 300, and the suction port 310 changes its spatial position as the suction tube 300 slides axially and the end 100 bends.

[0046] Specifically, the axis of the suction port 310 forms an acute angle with the axis of the suction tube 300, so that when the suction tube 300 is diluted with liquid, the direction of the flushing fluid ejected through the suction port 310 is opposite to the end 100. When the suction tube 300 becomes blocked, the flushing fluid diverted from the membrane assembly will be ejected from the suction port 310. Since the suction port 310 is angled and the opening direction is opposite to the end 100, the direction of the ejected water intersects with the direction of the liquid outflow from the outlet 240. In this way, the material blocking the suction port will be pushed into the stomach by this water. The material pushed back into the stomach will be immediately diluted by the normal gastric lavage fluid flow and then removed. Compared with the conventional method of clearing the suction tube 300 by gas pulse, this method avoids the force of clearing directly flushing the blockage back into the stomach, thereby reducing the risk of a large impact force pushing the blockage into the vicinity of the pylorus.

[0047] As a further embodiment of the present invention, a blade 101 is fixedly provided near the suction port 310, and the position of the blade 101 corresponds to the position of the pull rope 231 so that the blade 101 can be driven when the pull rope 231 is pulled.

[0048] Specifically, when medical staff pull the pull cord 231 to adjust the direction of the end 100, the movement of the pull cord 231 will have a certain driving effect on the blade 101. The tension change or slight displacement of the pull cord 231 will be transmitted to the blade 101 through mechanical linkage, causing the blade 101 to produce a slight swing or vibration. This micro-movement is used near the suction port 310, which can effectively prevent food residue or viscous gastric contents from accumulating and clogging at the suction port 310, thus achieving dynamic anti-clogging. Compared with traditional static anti-clogging structures such as filters, the linkage design between the blade 101 and the pull cord 231 in this embodiment organically combines the direction adjustment function with the anti-clogging function, achieving active cleaning of the suction port without adding extra operations.

[0049] As a further embodiment of the present invention, an outer seal 302 is provided on the outer wall of the suction tube 300, and a corresponding inner seal 251 is provided on the inner wall of the flushing tube 200.

[0050] Specifically, the outer seal 302 consists of multiple annular protruding teeth arranged circumferentially along the outer wall of the suction pipe 300. The tooth tips are sharp triangular or trapezoidal, the tooth height is 0.2-0.5 mm, the tooth spacing is 0.5-1.0 mm, and they are arranged axially to form 3-5 sealing teeth. The inner seal 251 is a corresponding annular groove or smooth inner wall on the inner wall of the flushing pipe 200, forming a small gap of 0.05-0.1 mm with the protruding teeth of the outer seal.

[0051] The outer seal 302's protruding teeth do not directly contact the inner wall of the inner seal 251, but maintain a fixed gap, forming a tortuous fluid channel, and the two form a sliding seal fit. This double-seal structure ensures that when the suction pipe 300 slides axially relative to the flushing pipe 200, the annular gap between the flushing pipe 200 and the suction pipe 300 remains sealed, preventing the flushing fluid from leaking or flowing during the sliding process. When the suction pipe 300 extends to its longest distance, the arc-shaped surface 330 completely breaks away from obstructing the outlet 240, and the flushing fluid is directly sprayed obliquely to flush the area around the end 100. At this time, since the suction port 310 also moves forward with the suction pipe 300, the directly sprayed flushing fluid can effectively clean the area around the suction port 310, further enhancing the anti-clogging effect.

[0052] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A gastric lavage device for pesticide poisoning, comprising a gastric tube, characterized in that: The gastric tube includes a flushing tube (200) and a suction tube (300) arranged coaxially nested, and the suction tube (300) can slide axially relative to the flushing tube (200); The end (100) is located at the top of the suction tube (300), and the end (100) is equipped with a miniature camera (110) for real-time observation of the stomach. A direction adjustment mechanism is provided between the suction tube (300) and the end (100) and is used to adjust the bending direction of the end (100); An arc-shaped surface (330) is provided on the side wall of the suction tube (300) and corresponds to the liquid outlet (240) opened on the flushing tube (200); The direction adjustment mechanism adjusts the bending direction of the end (100) so that the arc surface (330) changes its orientation synchronously with the suction tube (300), and the flushing liquid sprayed from the outlet (240) is reflected by the arc surface (330) and shot towards the working area; the suction tube (300) slides along the axial direction to change the relative position of the arc surface (330) and the outlet (240) to adjust the scattering angle and spray force of the flushing liquid.

2. The gastric lavage device for pesticide poisoning according to claim 1, characterized in that, The direction adjustment mechanism includes a plurality of pull ropes (231) disposed within the suction tube (300) and used to adjust the direction of the end (100).

3. A gastric lavage device for pesticide poisoning according to claim 2, characterized in that, The suction tube (300) includes an inner wall tube (250), and a fixing rib (260) is provided between the inner wall tube (250) and the outer wall of the suction tube (300) to form a channel for accommodating the pull rope (231).

4. A gastric lavage device for pesticide poisoning according to claim 2, characterized in that, The end (100) has a cavity inside, and the cavity is covered with a movable membrane (120). The pull rope (231) passes through the cavity and is connected to the end (100).

5. A gastric lavage device for pesticide poisoning according to claim 3, characterized in that, The inner wall tube (250) is provided with a thin film assembly (252) for diluting the liquid into the suction tube (300) when the suction tube (300) is blocked.

6. A gastric lavage device for pesticide poisoning according to claim 5, characterized in that, The thin film assembly (252) includes two symmetrically arranged abutment portions (2521), and the adjacent ends of the two abutment portions (2521) are provided with abutting surfaces (2522) and abut against each other and seal under normal conditions; A notch (2523) is provided at the connection between the back side of the abutment part (2521) and the inner wall tube (250). The notch (2523) is used to guide the abutment part (2521) to bend towards the axis of the suction tube (300) under the action of pressure difference.

7. A gastric lavage device for pesticide poisoning according to claim 1, characterized in that, At least one suction port (310) is radially provided on the suction tube (300). The suction port (310) changes its spatial position as the suction tube (300) slides axially and the end (100) bends.

8. A gastric lavage device for pesticide poisoning according to claim 7, characterized in that, The angle between the axis of the suction port (310) and the axis of the suction tube (300) is acute, so that when the suction tube (300) is diluted with liquid, the direction of the flushing liquid sprayed out through the suction port (310) is away from the end (100).

9. A gastric lavage device for pesticide poisoning according to claim 7, characterized in that, A blade (101) is fixedly provided near the suction port (310), and the position of the blade (101) corresponds to the position of the pull rope (231) so that the blade (101) can be driven when the pull rope (231) is pulled.

10. A gastric lavage device for pesticide poisoning according to claim 1, characterized in that, An outer seal (302) is provided on the outer wall of the suction tube (300), and a corresponding inner seal (251) is provided on the inner wall of the flushing tube (200).

Images