Gastric lavage auxiliary device

Abstract

The invention discloses a gastric lavage auxiliary device. The gastric lavage auxiliary device comprises a distraction assembly, the opening assembly comprises two upper pressing plates and a lower pressing plate, the two upper pressing plates are distributed in a bilateral symmetry mode, crow plates are arranged at the rear ends of the upper pressing plates, the lower pressing plate is located at the bottoms of the upper pressing plates, and the rear end of the lower pressing plate is connected with the bottoms of the rear ends of the upper pressing plates in a swinging mode. Expansion bodies are arranged between the upper pressing plate and the lower pressing plate, a channel communicated with the expansion bodies is formed in the front end of the lower pressing plate, and the channel is communicated with a filling component used for controlling expansion of the expansion bodies. The device further comprises a fixing assembly located on the front side of the lower pressing plate, the fixing assembly comprises a swing part, a fixing ring is arranged in the middle of the swing part, slidable inclined sliding rods are arranged at the top and the bottom of the fixing ring respectively, one ends of the two inclined sliding rods extend into the fixing ring, and fixing pieces are arranged at the tail ends, extending into the fixing ring, of the inclined sliding rods. And the inclined sliding rod is sleeved with a spring. The device can rapidly open the mouth of a patient and fix a gastric lavage tube.

Description

Technical Field

[0001] This application relates to the field of gastric lavage auxiliary devices, and in particular to a gastric lavage auxiliary device. Background Technology

[0002] Gastric lavage is a common and crucial emergency treatment procedure for patients poisoned by oral toxins (such as drugs, excessive alcohol, etc.). This procedure aims to rapidly remove unabsorbed toxins from the stomach, thereby reducing toxin absorption, minimizing damage to vital organs, and creating conditions for subsequent treatment.

[0003] Before gastric lavage, the mouths of some comatose patients are often closed, especially those with oral muscle spasms, making it difficult to open their mouths quickly. Before inserting the gastric tube, a bite block is often inserted into the patient's mouth to secure it. When the patient's mouth is closed, it may be impossible to install the bite block or insert and secure the gastric tube. In the prior art, a gastric lavage intubation oral support device (application publication number CN117379627A) is disclosed. This device rotates a connecting sleeve, which in turn rotates a first turntable, causing two first moving blocks to move two first supporting blocks outwards simultaneously, thus providing longitudinal support and stretching of the mouth. However, this device is relatively large. When the patient's mouth is closed, other methods are needed to open it before the support device can be inserted, which may take a considerable amount of time and may not allow for quick opening and securing of the gastric tube. Another example is a safe gastric lavage device for children (application publication number CN120900040A). This device uses the rotation of the first drive shaft to allow the upper and lower support units to support and limit the oral cavity. This device can also be used for adults. However, the overall size of this device is relatively large, and when inserting the gastric lavage tube, it needs to pass through many limiting components, which may prevent the patient's mouth from being quickly opened and the gastric lavage tube from being secured. Summary of the Invention

[0004] The technical problem to be solved by this application is to provide a gastric lavage auxiliary device that can quickly open the patient's mouth and fix the gastric lavage tube.

[0005] To solve the above-mentioned technical problems, this application adopts the following technical solution:

[0006] A gastric lavage assist device, including an opening component;

[0007] The expansion assembly includes two upper pressure plates and a lower pressure plate. The two upper pressure plates are symmetrically distributed from left to right. A pry plate is provided at the rear end of each upper pressure plate. The lower pressure plate is located at the bottom of the upper pressure plates, and its rear end is swayably connected to the bottom rear end of the upper pressure plates. An expansion body is provided between the upper pressure plates and the lower pressure plate. A channel communicating with the expansion body is opened inside the front end of the lower pressure plate. The channel is connected to a filling component for controlling the expansion of the expansion body.

[0008] It also includes a fixing assembly located on the front side of the lower pressure plate. The fixing assembly includes a swinging component. The middle part of the swinging component is provided with a fixing ring. The top and bottom of the fixing ring are respectively provided with slidable inclined slide rods. One end of the two inclined slide rods extends into the fixing ring. The end of the inclined slide rod extending into the fixing ring is provided with a fixing plate. A spring is sleeved on the inclined slide rod.

[0009] In some embodiments, the expander has a wedge-shaped structure with a front height greater than a rear height. This addresses the problem of how to enable the opening assembly to open according to the opening trajectory of the oral cavity.

[0010] In order to enable communication between the channel and the filling component, in some embodiments, a horizontally arranged connecting pipe is connected to the middle of the front end of the two lower pressure plates. The left and right ends of the connecting pipe are respectively connected to the channel on the two lower pressure plates, and the bottom of the connecting pipe is provided with a through hole that communicates with the filling component.

[0011] In some embodiments, the filling component includes a tubing and a syringe. One end of the tubing is sealed to a through-hole, and the other end is sealed to a connecting sleeve. The syringe includes a syringe barrel and a helical piston disposed within the syringe barrel, with the connecting end of the syringe barrel connected to the connecting sleeve. The connection between the syringe and the tubing solves the problem of how to manually and quantitatively control the expansion degree of the expansion portion.

[0012] In some embodiments, a cover plate is fixedly connected to the end face of the syringe away from the connecting sleeve, and a threaded through hole is provided in the center of the cover plate.

[0013] Further expanding upon the above solution, the helical piston includes a piston head and a piston handle. The piston head is sealed inside the syringe and can slide along the length of the syringe. One end of the piston handle, extending into the syringe, is hinged to the piston head. The outer wall of the piston handle is threaded, and the piston handle is screwed into the threaded through-hole of the cover plate via its own threads. By cooperating with the threaded through-hole of the cover plate, the problem of how to stably maintain the pressure after the syringe provides expansion pressure is solved.

[0014] In some embodiments, the swing component includes two fixed sleeves, each arranged laterally at the front end of the lower pressure plate. Each of the two fixed sleeves contains a Z-shaped swing rod, with the lateral section at the top of the swing rod located within the fixed sleeve. This addresses the problem of how to make the swing component swing.

[0015] Further expanding upon the above solution, the side wall of the fixed sleeve is provided with a hollowed-out groove, and a toothed block is fixedly connected within the hollowed-out groove. The end face of the toothed block located inside the fixed sleeve has a first locking tooth arranged laterally; the outer circumference of the transverse section of the swing rod has several second locking teeth arranged laterally; the first locking teeth engage with the second locking teeth. This solves the problem of swinging to the optimal position above or below the oral cavity and being firmly locked in that position.

[0016] In some embodiments, when the retaining ring swings below the lower pressure plate, the inclined slide rod is positioned obliquely rearward; when the retaining ring swings above the lower pressure plate, the inclined slide rod is positioned obliquely forward. This is to determine the functional posture of the retaining assembly in different working positions.

[0017] Compared to existing technologies, this application achieves at least the following beneficial effects: The device features a pry bar at the rear end of the opening component. For poisoned patients with tightly closed mouths, the pry bar can be inserted between the patient's upper and lower teeth to create a gap. Due to the thin and lightweight overall structure of the opening component, it can be quickly inserted between the patient's teeth after the gap is created. Subsequently, the expansion body between the upper and lower pressure plates expands in conjunction with the filling component, thereby driving the upper and lower pressure plates to open the patient's mouth along the direction of mouth opening, achieving the function of rapid insertion and opening of the mouth. A swingable fixing component is provided at the front end of the lower pressure plate of the opening component. After opening the patient's mouth, swinging the fixing component upwards can adjust the fixing ring to be positioned between the patient's upper and lower teeth. When the gastric lavage tube is inserted into the fixing ring, the design of the inclined slide rod and the fixing plate can fix it in its current position. If the gastric lavage tube tends to slip out of the patient's mouth, the inclined slide rod will cause the fixing plate to press more tightly against the outer wall of the gastric lavage tube, thereby both fixing the gastric lavage tube and preventing it from slipping out. In summary, this device can quickly adjust the fixing components into place and fix the gastric lavage tube after rapidly opening the patient's mouth. Attached Figure Description

[0018] One or more embodiments of this application will now be described by way of example only with reference to the accompanying drawings, in which:

[0019] Figure 1 This is a perspective view of a gastric lavage support device according to one embodiment of this application;

[0020] Figure 2 for Figure 1 Side sectional view of the embodiment in its current state;

[0021] Figure 3 This is a schematic diagram of the operation of a gastric lavage support device according to another embodiment of this application;

[0022] Figure 4 for Figure 3 Side sectional view of the embodiment in its current state;

[0023] Figure 5 A perspective view of the lower pressure plate in a gastric lavage assist device according to another embodiment of this application;

[0024] Figure 6 This is a partial exploded view of the swinging component in the gastric lavage support device of this application;

[0025] Figure 7 for Figure 6 Side view of the fixed sleeve in the swing assembly in the embodiment;

[0026] Figure 8 This is a front sectional view of the filling component in the gastric lavage support device of this application.

[0027] The numbers on the map are:

[0028] 1. Upper pressure plate; 11. Pry bar;

[0029] 2. Lower pressure plate; 21. Channel;

[0030] 3. Fixed sleeve; 31. Toothed block; 311. First retaining tooth;

[0031] 4. Swing rod; 41. Second locking tooth;

[0032] 5. Protrusion; 6. Retaining ring; 7. Retaining plate; 8. Angled slide bar;

[0033] 9. Filling component; 91. Syringe; 911. Connecting end; 92. Piston head; 93. Piston handle; 94. Cover plate.

[0034] 10. Connecting sleeve; 20. Flexible hose;

[0035] 30. Connecting pipe; 301. Connection pipe;

[0036] 40. Expansion body; 50. Hoop; 60. Spring. Detailed Implementation

[0037] The present application will now be described in detail with reference to exemplary embodiments shown in the accompanying drawings. However, it should be understood that the present application may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided herein to make the disclosure of the present application more complete and to fully convey the concept of the present application to those skilled in the art.

[0038] In the description of this application, it should be understood that the terms "center", "lateral", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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 limiting the scope of protection of this application.

[0039] The inventors addressed the shortcomings of existing technologies, such as the inability to quickly open a patient's mouth and secure the nasogastric tube. After careful analysis, they discovered that the main reason for this problem lies in:

[0040] Many comatose patients experience tension in their jaw muscles, trismus, or even oral muscle spasms or jaw rigidity, making it difficult to effectively open enough space for tube insertion within seconds to tens of seconds using conventional methods. Even if the space is pried open with difficulty, without effective and continuous support and fixation, the mouth is very likely to close again or bite during the procedure. This not only hinders the smooth insertion of the gastric tube but may also cause the partially inserted gastric tube to shift, fold, or even be unconsciously bitten off or damaged by the patient. This interrupts the gastric lavage process, reduces its efficiency, and increases the risks of aspiration and mucosal damage.

[0041] In existing technology, the publicly disclosed oral support device for gastric lavage (application publication number CN117379627A) can achieve oral support through mechanical adjustment. However, the overall structure of this device is relatively complex. The shell and support mechanism themselves have a fixed volume. When the patient's mouth is closed, its large external size makes it impossible to directly insert it between the teeth. In clinical practice, medical staff have to use auxiliary tools such as tongue depressors and mouth openers to forcibly pry open the patient's mouth to create sufficient space before inserting the support device. This process not only increases the number of steps but also prolongs the emergency preparation time, which may delay critical treatment in emergency rescue scenarios. In addition, although the device has a support function, it does not integrate a quick locking mechanism for the gastric lavage tube. After the mouth is opened, the gastric tube still needs to be fixed separately, and the overall process is not smooth and rapid enough.

[0042] Similarly, another safe gastric lavage device for children (application publication number CN120900040A), while designed to accommodate children's oral cavity and limit the gastric tube, suffers from similar structural problems. The device is still quite bulky; the support arms and base, even when not fully extended, are already substantial, making direct insertion difficult for patients with closed mouths, often requiring pre-existing artificial opening. Furthermore, the lavage tube must be sequentially threaded through an inlet cannula, multiple limiting cannulas, and an outlet cannula. These cannulas are initially arranged in a straight line, requiring individual threading during operation, resulting in numerous steps. In the limiting state, the cannulas transform into a zigzag shape to secure the gastric tube; while this transformation prevents tube displacement, it also increases the complexity and time cost of the procedure.

[0043] In summary, while the two existing devices mentioned above each have their own advantages in terms of oral support or gastric tube restraint, they share common limitations: their overall size is relatively large, making direct insertion with the mouth closed is difficult; and their operation procedures are multi-step and time-consuming, which is not conducive to rapid treatment in emergency situations. This is especially true when dealing with comatose patients or those experiencing oral muscle spasms, potentially requiring even more time for the procedure.

[0044] Based on the above analysis, the inventors designed a gastric lavage auxiliary device to solve the aforementioned technical problems.

[0045] like Figure 1 , 2 and Figure 5-7 As shown, in at least one embodiment of a gastric lavage assist device of this application, a spreading component is included.

[0046] The retractor assembly comprises an upper pressure plate 1 and a lower pressure plate 2 made of medical-grade plastics (such as polyvinyl chloride, polyethylene, polypropylene, polystyrene, polycarbonate, etc.). The upper pressure plate 1 is a long, thin, strip-shaped structure with a thickness of 1-1.5 mm, consisting of two plates symmetrically distributed on the left and right sides. The length of the upper pressure plate 1 matches the depth of the oral cavity, allowing it to be inserted up to the last molar in the mouth. Its width is greater than the width of the molar in the mouth, so as to completely cover and support the palate in the molar area. The two rear corners of the upper pressure plate 1 are designed with a curved transition, and this part is thinner (approximately 1 mm), forming a pry bar 11. In use, the pry bar 11 is inserted between the patient's upper and lower teeth to create a gap, and then the entire retractor device is placed into the patient's oral cavity. A U-shaped connecting plate of the same width and thickness as the upper pressure plate 1 connects the two upper pressure plates 1 together.

[0047] The lower pressure plate 2 has the same structure as the upper pressure plate 1, consisting of two pieces located at the bottom of the upper pressure plate 1. The rear end of the lower pressure plate 2 is hinged to the bottom of the rear end of the upper pressure plate 1 (i.e., the bottom between the upper pressure plate 1 and the skid plate 11). Specifically, on the left and right sides of the bottom of the upper pressure plate 1, horizontally arranged bushings are integrally formed; at the rear end of the lower pressure plate 2, a horizontally arranged rotating shaft is welded or fused, with its left and right ends respectively placed in the corresponding bushings, thus forming a hinge.

[0048] An expansion body 40 is provided between the upper pressure plate 1 and the lower pressure plate 2 on the left and right sides, respectively. Specifically, the top surface of the expansion body 40 is bonded and fixed to the bottom surface of the upper pressure plate 1, and the bottom surface is bonded and fixed to the top surface of the lower pressure plate 2. The front ends of the two lower pressure plates 2 are provided with channels 21 that communicate with the expansion bodies 40. The channels 21 are connected to filling components 9 for controlling the expansion of the expansion bodies 40.

[0049] This device also includes a fixing assembly located in front of the lower pressure plate 2. The fixing assembly is made of medical-grade rigid plastic (the same material as the upper pressure plate 1) and includes a swinging component. A fixing ring 6 is installed in the middle of the transverse surface of the swinging component. The swinging component can drive the fixing ring 6 to flip up or down to adapt to the needs of different operating scenarios. Sliding inclined rods 8 are respectively installed at the top and bottom of the fixing ring 6. One end of each inclined rod 8 extends into the fixing ring 6, and the end of the inclined rod 8 extending into the fixing ring 6 is fixedly connected to an arc-shaped fixing piece 7. The two fixing pieces 7 form a circular ring structure. A metal spring 60 is sleeved on the inclined rod 8.

[0050] After initial intervention using the skid 11, the expansion body 40 is expanded to quickly open the oral cavity; the gastric lavage tube is stably fixed in the expanded state by the fixing component to prevent it from slipping and shifting.

[0051] After being filled, the inflatable body 40 has a wedge-shaped structure with a front height greater than a rear height. This allows the upper pressure plate 1 and lower pressure plate 2 of the expansion assembly to better conform to the upper and lower teeth and adapt to the physiological structure of the oral cavity when it is open. To achieve this function, the inflatable body 40 is a wedge-shaped or triangular air bladder structure, and when the air bladder is not filled, its front end is stacked in a pleated shape.

[0052] To connect the two lower pressure plates 2, a horizontally arranged connecting pipe 30 is welded or fused to the middle of the front end of the two lower pressure plates 2. The left and right ends of the connecting pipe 30 are respectively connected to the channels 21 on the two lower pressure plates 2. A through hole communicating with the filling component 9 is opened at the bottom of the middle position of the connecting pipe 30.

[0053] like Figure 1 and 8As shown, the filling component 9 includes a tubing 20 and a syringe. The tubing 20 is a silicone tube. A section of connecting tube 301, facing downwards, is welded or fused to the through hole at the bottom of the middle position of the connecting tube 30. One end of the tubing 20 is sleeved to the connecting tube 301. A circular clamp 50 is fitted onto the tubing 20. After the tubing 20 is sleeved to the connecting tube 301, the clamp 50 is moved to the sleeved position to tightly clamp the tubing 20 to securely connect the tubing 20 and the connecting tube 301. The other end of the tubing 20 is sealed with a plastic connecting sleeve 10 by adhesive or fusion. The syringe includes a syringe barrel 91 and a helical piston disposed within the syringe barrel 91. The syringe barrel 91 is an existing product, and its end connected to the needle is a connecting end 911, which is connected to the connecting sleeve 10.

[0054] To improve the stability of the connection between the syringe 91 and the connecting sleeve 10, an external thread is provided on the outer wall of the connecting end 911 of the syringe 91, and an internal thread is provided on the inner wall of the connecting sleeve 10. The connecting end 911 is screwed into the connecting sleeve 10, which not only ensures the sealing performance, but also prevents the connecting end 911 from coming out of the connecting sleeve 10 during the filling process.

[0055] A rectangular cover plate 94 is fused to the end face of the syringe 91 away from the connecting sleeve 10, and a threaded through hole is opened in the center of the cover plate 94.

[0056] The helical piston includes a piston head 92 and a piston handle 93. The piston head 92 is a black sealing head (usually made of black rubber) integrated into the syringe, sealed within the syringe barrel 91, and can slide along the length of the syringe barrel 91. The piston handle 93 is a round rod with a diameter smaller than the inner diameter of the syringe barrel 91, and its end extending into the syringe barrel 91 is machined into a convex-shaped cross-section (the larger end faces the piston head 92). A convex-shaped countersunk hole is formed on the end face of the piston head 92 facing the piston handle 93, and the piston handle 93 fits into the convex-shaped countersunk hole of the piston head 92, forming a hinge. A thread is formed on the left outer wall of the piston handle 93, and the piston handle 93 is screwed into the threaded through hole of the cover plate 94 through its own threads. The syringe barrel 91 can contain air or be injected with liquid. Rotate the piston handle 93 in the forward direction, so that it drives the piston head 92 to move toward the connecting end 911 of the syringe 91 through the threaded drive, and inject air or liquid into the two expansion bodies 40 through the hose 20 and the channel 21, so that the expansion bodies 40 expand and drive the front end of the expansion assembly to open.

[0057] A through hole is provided on the side of the piston handle 93, which protrudes from the syringe 91. A round shaft perpendicular to the piston handle 93 is fixedly inserted into the through hole to facilitate the application of force to rotate the piston handle 93. The length of the round shaft is designed as needed.

[0058] To increase the travel distance of the piston head 92, the thread pitch on the piston handle 93 can be designed to be larger. The outer surface of the syringe 91 is marked along its length with the opening angle values ​​of the opening assembly when the piston head 92 moves to different positions. By conducting pre-simulation experiments, recording and marking the opening angle values ​​of the opening assembly corresponding to different filling volumes on the outer surface of the syringe 91 can improve the speed at which the patient's oral cavity is opened.

[0059] By using a helical piston in conjunction with a cover plate 94 with a threaded through hole, the problem of how to stably maintain the pressure after the syringe provides expansion pressure is solved, preventing the expansion body 40 from retracting due to the patient struggling or muscle contraction, and ensuring the persistence and stability of the expanded state.

[0060] The swinging component includes two fixed sleeves 3, which are laterally fixed to the front end of the lower pressure plate 2. Each of the two fixed sleeves 3 is provided with a Z-shaped swing rod 4. The lateral section at the top of the swing rod 4 is located inside the fixed sleeve 3, and the swinging rod 4 swings upward or downward around the axis of the fixed sleeve 3 through the lateral section.

[0061] The side wall (such as the top wall) of the fixed sleeve 3 is provided with a transverse hollow groove, and a toothed block 31 is integrally formed in the hollow groove, with a gap between the toothed block 31 and the hollow groove. The end face of the toothed block 31 located inside the fixed sleeve 3 is provided with at least one transversely arranged first locking tooth 311. The outer circumference of the transverse section of the swing rod 4 is provided with several transversely arranged second locking teeth 41, and the first locking teeth 311 engage with the second locking teeth 41.

[0062] The first locking tooth 311 engages with the second locking tooth 41 to form a fixed connection. When the swing rod 4 is swung up or down, the second locking tooth 41 on the transverse section at the top of the swing rod 4, while rotating, presses against and drives the toothed block 31 where the first locking tooth 311 is located to undergo elastic deformation or swing (e.g., swinging upward) to avoid the movement of the swing rod 4. When the swing rod 4 stops swinging, the first locking tooth 311 re-engages with the nearest second locking tooth 41 on the transverse section, and the toothed block 31 resets, thereby fixing the swing rod 4 and the fixing ring 6 in the current position.

[0063] The Z-shaped swing rod 4, the fixed sleeve 3, and the toothed clamping structure solve the problem of how the fixing ring 6 can be easily swung to the position above the oral cavity according to the operation needs and fixed in that position to prevent shaking or displacement when fixing the gastric lavage tube.

[0064] The left and right sides of the fixed ring 6 are respectively welded to the end faces of the horizontal sections at the bottom of the two swing rods 4.

[0065] On the top and bottom surfaces of the fixing ring 6, protrusions 5 are integrally formed. The top and bottom walls of the fixing ring 6 are respectively provided with obliquely arranged countersunk holes, the end of the countersunk hole facing the protrusion 5 not penetrating the protrusion 5. On the top surface of the protrusion 5, a through hole communicating with the countersunk hole is provided. Two oblique sliding rods 8 are respectively placed in the through holes of the two protrusions 5, and extend into the fixing ring 6 through the countersunk holes. The spring 60, after being sleeved on the oblique sliding rod 8, is located in the countersunk hole, with its end facing the protrusion 5 abutting against the end face of the countersunk hole extending into the protrusion 5, and its other end abutting against the surface where the fixing piece 7 connects to the oblique sliding rod 8.

[0066] The end of the inclined slide bar 8 that protrudes from the protrusion 5 has a flange to prevent the inclined slide bar 8 from slipping off the fixing ring 6.

[0067] like Figure 1 and Figure 2 As shown, when the fixing ring 6 swings to below the lower pressure plate 2, the inclined sliding rod 8 is positioned obliquely backward. Figure 3 and Figure 4 As shown, when the fixing ring 6 swings above the lower pressure plate 2, the inclined slide bar 8 is positioned diagonally forward. When the gastric lavage tube is inserted from the front end of the fixing ring 6, the tube will push open the two vertically distributed semi-circular fixing plates 7, compressing the spring 60. If the gastric lavage tube slides outward, the fixing plates 7, in contact with the tube and compressed by the spring 60, will press the fixing plates 7 more tightly as the tube slides further outward. This is because there is friction between the outer wall of the gastric lavage tube and the concave surface of the fixing plates 7. When the tube moves outward, the friction will cause the fixing plates 7 to move forward along the inclined slide bar 8. Simultaneously, under the inclined guidance of the inclined slide bar 8, the fixing plates 7 are also moving towards the center. The outward pulling force of the gastric lavage tube is converted into a radial clamping force that makes the fixing plates 7 grip the tube more tightly through the inclined surface of the slide bar 8.

[0068] The method of using this device is as follows:

[0069] Step 1: The medical staff stands to the side of the patient, with the end of the device's pry bar 11 facing the patient's mouth. The pry bar 11 is inserted between the patient's upper and lower teeth. Using the leverage of the pry bar 11, a gap is pried open, and then the upper pressure plate 1 and lower pressure plate 2 of the device's opening component are slid into the patient's mouth as a whole until their rear ends are roughly in the molar area.

[0070] Step 2: Pre-seal the filling component 9 to the connecting tube 30 on the lower pressure plate 2. Slowly and evenly rotate the piston handle 93 of the syringe in a forward direction. At this time, the helical piston will push the piston head 92 forward, injecting the medium (air or liquid) into the expander 40. Simultaneously observe the patient's oral cavity opening and refer to the angle scale on the outer wall of the syringe 91 to open the oral cavity to a suitable angle for gastric lavage tube operation. The wedge force generated by the expansion will cause the upper pressure plate 1 and the lower pressure plate 2 to fit against the teeth, achieving stable support and fixation, preventing the expansion component from falling out of the oral cavity (the expander 40 expands upward and to the sides at the same time, which can lock the expansion component into the oral cavity).

[0071] Step 3: Depending on the patient's position, swing the retaining ring 6 upwards to the center of the open mouth. While swinging, press the patient's chin with your left thumb and the front top surface of the pressure plate 2 with your index finger, and push the swing rod 4 or retaining ring 6 upwards with your other hand. The second locking tooth 41 on the swing rod 4 will push open the first locking tooth 311 on the toothed block 31 until the hole of the retaining ring 6 is directly facing the patient's mouth. Stop swinging the swing rod 4 or retaining ring 6. At this time, the first locking tooth 311 and the second locking tooth 41 will engage, fixing the retaining ring 6 in the current position.

[0072] Step 4: Insert the gastric lavage tube into the front end of the upturned retaining ring 6. The inserted end of the gastric lavage tube pushes open the upper and lower retaining plates 7 inside the retaining ring 6. The gastric lavage tube is fixed in place by the retaining plates 7 and is difficult to dislodge from the retaining ring 6 due to the compression of the spring 60. At this point, the gastric lavage procedure can be performed.

[0073] After gastric lavage, slowly and evenly rotate the syringe piston handle 93 in the opposite direction to allow the medium in the expansion body 40 to flow back into the syringe. The upper pressure plate 1 and lower pressure plate 2 will then close, and the patient's mouth will gradually close. Once the expansion assembly has contracted to a removable state, it can be carefully removed from the patient's mouth along with the gastric lavage tube.

[0074] It should be understood that all the above embodiments are exemplary and not restrictive. Various modifications or variations made by those skilled in the art to the specific embodiments described above under the concept of this application should be within the protection scope of this application.

Claims

1. A gastric lavage assist device, characterized in that: Including expansion components; The expansion assembly includes two upper pressure plates and a lower pressure plate. The two upper pressure plates are symmetrically distributed from left to right. A pry plate is provided at the rear end of each upper pressure plate. The lower pressure plate is located at the bottom of the upper pressure plates, and its rear end is swayably connected to the bottom rear end of the upper pressure plates. An expansion body is provided between the upper pressure plates and the lower pressure plate. A channel communicating with the expansion body is opened inside the front end of the lower pressure plate. The channel is connected to a filling component for controlling the expansion of the expansion body. It also includes a fixing assembly located on the front side of the lower pressure plate. The fixing assembly includes a swinging component. The middle part of the swinging component is provided with a fixing ring. The top and bottom of the fixing ring are respectively provided with slidable inclined slide rods. One end of the two inclined slide rods extends into the fixing ring. The end of the inclined slide rod extending into the fixing ring is provided with a fixing plate. A spring is sleeved on the inclined slide rod.

2. The apparatus according to claim 1, characterized in that: The expansion body has a wedge-shaped structure with a front height greater than a rear height.

3. The apparatus according to claim 1, characterized in that: A horizontally arranged connecting pipe is connected to the middle of the front end of the two lower pressure plates. The left and right ends of the connecting pipe are respectively connected to the channels on the two lower pressure plates. A through hole connected to the filling component is opened at the bottom of the connecting pipe.

4. The apparatus according to claim 3, characterized in that: The filling component includes a tubing and a syringe. One end of the tubing is sealed to a through hole, and the other end is sealed to a connecting sleeve. The syringe includes a syringe barrel and a helical piston disposed inside the syringe barrel. The connecting end of the syringe barrel is connected to the connecting sleeve.

5. The apparatus according to claim 4, characterized in that: A cover plate is fixedly connected to the end face of the syringe away from the connecting sleeve, and a threaded through hole is opened in the center of the cover plate.

6. The apparatus according to claim 5, characterized in that: The helical piston includes a piston head and a piston handle. The piston head is sealed inside the syringe and can slide along the length of the syringe. One end of the piston handle extends into the syringe and is hinged to the piston head. The outer wall of the piston handle is threaded, and the piston handle is screwed into the threaded through hole of the cover plate through its own threads.

7. The apparatus according to claim 1, characterized in that: The swing component includes two fixed sleeves, which are arranged laterally at the front end of the lower pressure plate. Each of the two fixed sleeves is provided with a Z-shaped swing rod, and the lateral section at the top of the swing rod is located inside the fixed sleeve.

8. The apparatus according to claim 7, characterized in that: The side wall of the fixed sleeve is provided with a hollow groove, and a toothed block is fixedly connected in the hollow groove. The end face of the toothed block located inside the fixed sleeve is provided with a first locking tooth arranged horizontally. The outer circumference of the horizontal section of the swing rod is provided with a number of second locking teeth arranged horizontally. The first locking teeth and the second locking teeth engage.

9. The apparatus according to claim 1, characterized in that: When the fixed ring swings to below the lower pressure plate, the inclined slide rod is positioned diagonally backward; when the fixed ring swings to above the lower pressure plate, the inclined slide rod is positioned diagonally forward.

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