Liquid medicine and solid medicine feeding method without damaging esophagus of pig

Abstract

The invention discloses a liquid medicine and solid medicine feeding method without injuring pig esophagus, and relates to the technical field of animal feeding and dosing, a mouth gag is provided with an injury-free medicine feeding assembly, a hard plastic flow guide hose is installed in a middle limiting hole, and a side limiting hole is formed in the position, close to the middle limiting hole, of the mouth gag; limiting check rings are installed at the bottom end of the hard plastic flow guide hose and the bottom end of the soft plastic flow guide hose in an embedded mode, the top end of the soft plastic flow guide hose is connected with a sterile injector, and the mouth gag is provided with a flushing auxiliary assembly. Standardized operation enables data comparability between different batches or different laboratories to be greatly improved, the mouth gag is used for assisting intubation, operation stress reaction is reduced, accuracy of experimental data is improved, and mechanical injury of esophageal mucosa is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of animal feeding and drug administration, in particular to a liquid medicine and solid medicine gavage method without damaging the esophagus of pigs. BACKGROUND

[0002] In pig experimental research, oral gavage is a common forced drug administration method. Traditional gavage operation requires inserting a stomach tube into the stomach through the oral cavity and esophagus.

[0003] However, the stomach tube insertion process directly stimulates the highly sensitive oropharyngeal part of the pig, triggering violent struggle and swallowing reflex. This operation stress can cause sympathetic nervous excitement in animals, rapid acceleration of heart rate and respiration, and may cause severe fluctuations in blood pressure and metabolic indicators, seriously interfering with the accuracy of experimental data. Repeated intubation can also cause mechanical damage to the esophageal mucosa.

[0004] In the struggle state of pigs, it is difficult to stably place the stomach tube in the stomach, often causing the gavage liquid to overflow from the corners of the mouth or to be quickly regurgitated after gavage. This not only causes the actual drug dose to be much lower than the designed dose, affecting the reliability of pharmacological or toxicological experimental results, but also can cause serious foreign body pneumonia due to the accidental inhalation of liquid into the respiratory tract. In addition, the intubation speed, depth and technique vary among operators, resulting in different levels of stress experienced by different pigs or even the same pig in multiple gavage operations. This non-standardized operation introduces uncontrollable experimental variables, greatly reducing the comparability of data between different batches or different laboratories. SUMMARY

[0005] The present application provides a liquid medicine and solid medicine gavage method without damaging the esophagus of pigs, which can effectively solve the problem of stress caused by stomach tube insertion in the background art, which can cause sympathetic nervous excitement in animals, seriously interfere with the accuracy of experimental data, repeated intubation can also cause mechanical damage to the esophageal mucosa, and non-standardized operation introduces uncontrollable experimental variables, greatly reducing the comparability of data between different batches or different laboratories.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: a liquid medicine and solid medicine gavage method without damaging the esophagus of pigs, which utilizes an open mouth device and its non-injury medicine feeding assembly and flushing auxiliary assembly to achieve safe gavage of liquid and solid medicine, comprising the following steps: Step one: open mouth fixation, place the open mouth device in the oral cavity to keep the upper and lower jaws open, squeeze the hand-operated inflation bag, inflate the inflatable rubber ring through the air inlet pipe and air distribution pipe, and form stable fixation in the fastening groove, and cooperate with the anti-slip gasket to prevent slipping; Step two: select the flow guide hose, select a soft plastic flow guide hose or a hard plastic flow guide hose according to the type of drug administration; Step three: liquid medicine feeding, soft plastic guide hose is inserted into esophagus from side limiting hole to specified depth, and then sterile syringe is connected to slowly push medicine, after completion, the soft tube is pulled out and the inflatable rubber ring is released; Step four: solid capsule feeding, the capsule is placed into the front end of the hard plastic guide hose, inserted into the middle limiting hole to the predetermined position, and the plastic soft stick is pushed to send the capsule into the esophagus; Step five: flushing and cleaning, clean water enters the flushing hole through the funnel, folding pipe and flushing hose, and flows to the middle limiting hole and side limiting hole respectively for flushing, and the scraping pipe can remove the residues during the extraction of the soft tube.

[0007] According to the above technical scheme, the mouth opener is provided with a non-injury medicine feeding assembly, and the non-injury medicine feeding assembly comprises a middle limiting hole; The middle limiting hole is internally provided with a hard plastic guide hose, the hard plastic guide hose is internally movably provided with a plastic soft stick, the mouth opener is provided with a side limiting hole near the middle limiting hole, the side limiting hole is internally movably provided with a soft plastic guide hose, the bottom end of the hard plastic guide hose and the soft plastic guide hose is embedded with a limiting stop ring, and the top end of the soft plastic guide hose is connected with a sterile syringe.

[0008] According to the above technical scheme, the bottom end of the plastic soft stick is welded with a screw rod, the top end of the screw rod is connected with an upper threaded ring through threads, the bottom end of the screw rod is connected with a lower threaded ring through threads, and the extrusion rubber pipe is sleeved with the screw rod between the upper threaded ring and the lower threaded ring.

[0009] According to the above technical scheme, the plastic soft stick is movably sleeved with a rubber block at the top end of the hard plastic guide hose, and the rubber block is in inverted T-shaped longitudinal section.

[0010] According to the above technical scheme, the two ends of the mouth opener are provided with fastening grooves, the fastening grooves are internally sleeved with inflatable rubber rings, the outer side of the inflatable rubber rings is bonded with anti-skid pads, the middle part of the outer side of the mouth opener is provided with a tracheal groove, the tracheal groove is internally inlaid with a gas distribution pipe, the two ends of the gas distribution pipe are respectively connected with the inflatable rubber rings, the middle part of the gas distribution pipe is connected with one end of an air inlet pipe, and the other end of the air inlet pipe is connected with the air outlet end of a hand-operated inflatable bag.

[0011] According to the above technical scheme, the mouth opener is an ellipsoid with smaller diameters at both ends than at the middle part, the outer side of the mouth opener is uniformly provided with anti-skid lines, and the outer sides of the hard plastic guide hose and the soft plastic guide hose are provided with scale grooves.

[0012] According to the above technical scheme, the mouth opener is provided with a flushing auxiliary assembly, and the flushing auxiliary assembly comprises a flushing hole; According to the technical scheme, the opening device is provided with a washing hole at one end, a washing hose is embeddedly installed in the washing hole, a funnel is connected to one end of the washing hose, a folding pipe is connected to one end of the funnel, a reinforcing ring is bonded to one end of the folding pipe away from the funnel, an end cover is threadedly connected to one end of the reinforcing ring, and scraping pipes are bonded to positions close to the hard plastic guide hose and the soft plastic guide hose.

[0013] According to the technical scheme, the washing hole is connected with the middle limiting hole and the side limiting hole, and the diameter of the washing hole is larger than that of the middle limiting hole and the side limiting hole.

[0014] According to the technical scheme, the diameters of the two scraping pipes are equal to those of the corresponding middle limiting hole and side limiting hole, and the inner sides of the scraping pipes are smooth curved surfaces.

[0015] Compared with the prior art, the present application has the following beneficial effects: 1. The non-injury medicine feeding assembly is provided, the operator places the wooden opening device in the oral cavity of the pig, keeps the upper and lower jaws in a proper open state, after the opening device is placed, the manual air charging bag is squeezed, the air is supplied to the air charging rubber ring through the air distribution pipe and the air inlet pipe, the air charging rubber ring is inflated, the opening device is better fixed, and the rolling and falling of the opening device are further prevented.

[0016] Then, the liquid medicine and the solid capsule are given by gavage, the corresponding soft plastic guide hose and hard plastic guide hose are selected, one end of the plastic guide hose is slowly inserted through the opening device, and is gently pushed to a predetermined depth along the esophagus of the pig, in the pushing process, the operator can accurately control the insertion depth by observing the scale mark on the wall of the plastic guide hose, the soft plastic guide hose is fed with medicine by using a sterile syringe, the hard plastic guide hose is fed with medicine by using a plastic soft stick, and the setting of the rubber block ensures the accurate control of the pushing process, and the damage to the esophageal mucosa can be effectively avoided. The standardized operation greatly improves the comparability of data between different batches or different laboratories, the opening device is used for assisting intubation, the operation stress is reduced, the accuracy of experimental data is improved, and mechanical damage to the esophageal mucosa is avoided.

[0017] 2. The flushing auxiliary assembly is provided, after the medicine feeding is completed, clean water is poured into the container composed of the funnel and the folding pipe, the reinforcing ring and the end cover are connected, then the hard plastic guide hose and the soft plastic guide hose are pulled, so that the ends of the hard plastic guide hose and the soft plastic guide hose are aligned with the middle limiting hole and the side limiting hole, in the pulling process, the scraping pipes scrape part of the impurities, the flushing hose is embedded into the washing hole, the folding pipe is pressed, the clean water flows from the washing hole to the middle limiting hole and the side limiting hole, and finally the hard plastic guide hose and the soft plastic guide hose are flushed, so that the cleaning efficiency is higher and the cleaning effect is better.

[0018] In summary, the non-invasive medicine feeding assembly selects different medicine feeding modes according to different medicine feeding, the cleaning auxiliary assembly improves the cleaning efficiency, facilitates the next medicine feeding, and the scraping pipe of the cleaning auxiliary assembly can temporarily fix the hard plastic guide hose and the soft plastic guide hose during medicine feeding, facilitating the medicine feeding, and the two assemblies cooperate with each other, and the effect is better. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with embodiments of the present application, and do not constitute a limitation on the present application.

[0020] In the drawings: Figure 1 is a schematic diagram of the method steps of the present application; Figure 2 is a schematic diagram of the three-dimensional structure of the present application; Figure 3 is a schematic diagram of the non-invasive medicine feeding assembly of the present application; Figure 4 is a schematic diagram of the installation structure of the plastic soft rod of the present application; Figure 5 is a schematic diagram of the A area structure of the present application Figure 4 Figure 6 is a schematic diagram of the installation structure of the air inlet pipe of the present application; Figure 7 is a schematic diagram of the structure of the cleaning auxiliary assembly of the present application; Mark 1, opening device; 2, non-invasive medicine feeding assembly; 201, middle limiting hole; 202, hard plastic guide hose; 203, plastic soft rod; 204, side limiting hole; 205, soft plastic guide hose; 206, limiting check ring; 207, sterile syringe; 208, screw rod; 209, upper threaded ring; 210, lower threaded ring; 211, extruded rubber tube; 212, rubber block; 213, fastening groove; 214, inflatable rubber ring; 215, anti-skid gasket; 216, tracheal groove; 217, gas distribution pipe; 218, air inlet pipe; 219, hand inflation bag; 3, cleaning auxiliary assembly; 301, cleaning hole; 302, cleaning hose; 303, funnel; 304, folding pipe; 305, reinforcing ring; 306, end cover; 307, scraping pipe. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and do not limit the present application.

[0022] Embodiment: as Figure 1 ​As shown, a liquid medicine and solid medicine feeding method without damaging the esophagus of pigs, the method uses the mouth opener 1 and its non-injury medicine feeding assembly 2 and flushing auxiliary assembly 3 to realize the safe feeding of liquid and solid medicine, including the following steps: Step one: open fixation, place the mouth opener 1 in the oral cavity, keep the upper and lower jaws open, squeeze the hand inflation bag 219, inflate the inflatable rubber ring 214 through the air inlet pipe 218 and the air distribution pipe 217, so as to form stable fixation in the fastening groove 213, and cooperate with the anti-skid pad 215 to prevent slipping; Step two: select the flow guide hose, select the soft plastic flow guide hose 205 or the hard plastic flow guide hose 202 according to the type of drug administration; Step three: liquid medicine feeding, insert the soft plastic flow guide hose 205 into the esophagus to the specified depth from the side limiting hole 204, connect it with the sterile syringe 207, and then slowly push the medicine liquid, after completion, pull out the hose and release the inflatable rubber ring 214; Step four: solid capsule feeding, place the capsule at the front end of the hard plastic flow guide hose 202, insert it into the middle limiting hole 201 to the predetermined position, and push the plastic soft rod 203 to send the capsule into the esophagus; Step five: flushing and cleaning, clear water enters the flushing hole 301 through the funnel 303, folding pipe 304 and flushing hose 302, and flows to the middle limiting hole 201 and side limiting hole 204 respectively for flushing, and the scraper 307 can remove the residues during the extraction of the hose.

[0023] As Figures 2-7 shown, the mouth opener 1 is installed with the non-injury medicine feeding assembly 2, which includes the non-injury medicine feeding assembly 2, including the middle limiting hole 201, the hard plastic flow guide hose 202, the plastic soft rod 203, the side limiting hole 204, the soft plastic flow guide hose 205, the limiting stop ring 206, the sterile syringe 207, the screw 208, the upper screw ring 209, the lower screw ring 210, the extruded rubber pipe 211, the rubber block 212, the fastening groove 213, the inflatable rubber ring 214, the anti-skid pad 215, the air pipe groove 216, the air distribution pipe 217, the air inlet pipe 218 and the hand inflation bag 219; The middle part of the mouth opener 1 is provided with a middle limiting hole 201, and the two ends of the mouth opener 1 are provided with fastening grooves 213. The fastening grooves 213 are sleeved with inflatable rubber rings 214, and the outer sides of the inflatable rubber rings 214 are bonded with anti-skid washers 215. The middle part of the outer side of the mouth opener 1 is provided with an air pipe groove 216, and the air pipe groove 216 is inlaid with a gas distribution pipe 217. The two ends of the gas distribution pipe 217 are connected with the inflatable rubber rings 214 respectively, and the middle part of the gas distribution pipe 217 is connected with one end of an air inlet pipe 218. The other end of the air inlet pipe 218 is connected with an air outlet end of a manual air charging bag 219, so as to prevent the mouth opener 1 from sliding out of the mouth. The middle limiting hole 201 is internally provided with a hard plastic flow guide hose 202, and the hard plastic flow guide hose 202 is internally movably provided with a plastic soft stick 203. The plastic soft stick 203 is movably sleeved with a rubber stop block 212 at the top end position of the hard plastic flow guide hose 202. The rubber stop block 212 is in inverted T-shaped in longitudinal section, so as to facilitate limiting the insertion depth of the plastic soft stick 203. The mouth opener 1 is provided with a side limiting hole 204 near the middle limiting hole 201, and the side limiting hole 204 is movably provided with a soft plastic flow guide hose 205. The mouth opener 1 is an ellipsoid with smaller diameters at the two ends. The outer side of the mouth opener 1 is uniformly provided with anti-skid lines. The outer sides of the hard plastic flow guide hose 202 and the soft plastic flow guide hose 205 are provided with scale grooves, so as to prevent the mouth opener 1 from rolling during use and to be more stable. The bottom ends of the hard plastic flow guide hose 202 and the soft plastic flow guide hose 205 are embeddedly provided with limiting stop rings 206. The top end of the soft plastic flow guide hose 205 is connected with a sterile syringe 207. The bottom end of the plastic soft stick 203 is welded with a screw rod 208. The top end of the screw rod 208 is threadedly connected with an upper threaded ring 209, and the bottom end of the screw rod 208 is threadedly connected with a lower threaded ring 210. The screw rod 208 is sleeved with an extruded rubber pipe 211 at the position between the upper threaded ring 209 and the lower threaded ring 210, so as to facilitate the plastic soft stick 203 to close the bottom end of the hard plastic flow guide hose 202 and facilitate drug delivery.

[0024] The mouth opener 1 is provided with a flushing auxiliary assembly 3, which comprises a flushing hole 301, a flushing hose 302, a funnel 303, a folding pipe 304, a reinforcing ring 305, an end cover 306 and a scraping pipe 307. The opening device 1 is provided with a flushing hole 301 at one end, the flushing hole 301 is connected with the middle limiting hole 201 and the side limiting hole 204, the diameter of the flushing hole 301 is larger than that of the middle limiting hole 201 and the side limiting hole 204, so that the flushing hole 301 can flush the middle limiting hole 201 and the side limiting hole 204 with water, a flushing hose 302 is embedded and installed in the flushing hole 301, one end of the flushing hose 302 is connected with a funnel 303, one end of the funnel 303 is connected with a folding pipe 304, a reinforcing ring 305 is bonded to the end of the folding pipe 304 away from the funnel 303, one end of the reinforcing ring 305 is connected with an end cover 306 through screw connection, the opening device 1 is bonded with a scraping pipe 307 near the hard plastic guide hose 202 and the soft plastic guide hose 205, the diameters of the two scraping pipes 307 are equal to those of the corresponding middle limiting holes 201 and side limiting holes 204, the inner side of the scraping pipe 307 is a smooth curved surface, so that the inner walls of the middle limiting holes 201 and the side limiting holes 204 are complete curved surfaces, and the inserted pipeline is prevented from being scratched.

[0025] The working principle and use process of the present application are as follows: liquid medicine gavage operation: first, the operator places the wooden opening device 1 in the pig's oral cavity, so that the upper and lower jaws are kept in a moderate open state, the middle part of the opening device 1 is provided with a through hole, and the surface is provided with anti-skid lines, which can effectively prevent slipping during operation, and after the opening device 1 is put in, the hand-operated inflation bag 219 is squeezed, the inflation rubber ring 214 is inflated through the air distribution pipe 217 and the air inlet pipe 218, the opening device 1 is better fixed, and further prevents it from rolling off.

[0026] Then, the soft plastic guide hose 205 is taken, the hose is made of medical grade silicone material, and the pipe wall is provided with clear scale marks, one end of the soft plastic guide hose 205 is slowly inserted through the side limiting hole 204 of the opening device 1, and is gently pushed to the predetermined depth along the esophagus direction of the pig, during the pushing process, the operator can accurately control the insertion depth by observing the scale marks on the wall of the soft plastic guide hose 205.

[0027] Then, the sterile syringe 207 is firmly connected with the other end of the soft plastic guide hose 205, after confirming that the connection is tight, the piston of the sterile syringe 207 is slowly pushed, and the predetermined dose of liquid medicine is uniformly injected, during the injection process, the medicine delivery situation can be monitored in real time by observing the scale change of the soft plastic guide hose 205.

[0028] After the medicine injection is completed, the sterile syringe 207 is kept connected with the soft plastic guide hose 205, the soft plastic guide hose 205 is slowly withdrawn from the esophagus, the air in the inflation rubber ring 214 and the hand-operated inflation bag 219 is discharged, and finally the wooden opening device 1 is taken off, and the whole gavage operation is completed. Solid capsule gavage operation: first, according to the method of liquid medicine gavage operation, the wooden open mouth 1 is placed in the oral cavity of the pig and fixed properly, then the hard plastic guide hose 202 is taken, the capsule to be fed is placed at the limiting ring 206 at the front end of the hard plastic guide hose 202, the screw 208 is installed with the thread ring 209 at one end close to the plastic soft stick 203, the extrusion rubber tube 211 is connected, the screw 208 is installed with the thread ring 210 at the other end, the extrusion rubber tube 211 in the middle is extruded by the upper thread ring 209 and the lower thread ring 210, the extrusion rubber tube 211 in the middle protrudes outward and approaches the inner diameter of the hard plastic guide hose 202, the extrusion rubber tube 211 plays a guiding role, so that the plastic soft stick 203 is more stable in the hard plastic guide hose 202, and the subsequent drug feeding is facilitated; Then the plastic soft stick 203 is inserted into the hard plastic guide hose 202, and the rubber block 212 is arranged at the end of the plastic soft stick 203, the diameter of the rubber block 212 is greater than the inner diameter of the hard plastic guide hose 202, which can effectively prevent the soft stick from being inserted too much; The end of the hard plastic guide hose 202 with the capsule is inserted into the esophagus through the middle limiting hole 201 of the open mouth 1, when it is pushed to the predetermined position, the hard plastic guide hose 202 is kept stable, the plastic soft stick 203 is pushed, and the plastic soft stick 203 pushes the capsule into the deep part of the esophagus smoothly. Because the length of the plastic soft stick 203 is greater than the length of the hard plastic guide hose 202, and the rubber block 212 is arranged to ensure the accurate control of the pushing distance, damage to the mucosa of the esophagus can be effectively avoided.

[0029] After the capsule is pushed, the plastic soft stick 203 is first withdrawn from the hose, then the hard plastic guide hose 202 is slowly taken out of the esophagus, and finally the wooden open mouth 1 is removed, and the capsule gavage operation is completed; After the medicine is fed, clean water is poured into the container composed of the funnel 303 and the folding pipe 304, the reinforcing ring 305 and the end cover 306 are connected, then the hard plastic guide hose 202 and the soft plastic guide hose 205 are pulled, so that the ends of the hard plastic guide hose 202 and the soft plastic guide hose 205 are aligned with the middle limiting hole 201 and the side limiting hole 204 respectively, during the pulling process, the scraped pipe 307 scrapes part of the impurities, the flushing hose 302 is embedded into the flushing hole 301, the folding pipe 304 is pressed, the clean water flows from the flushing hole 301 to the middle limiting hole 201 and the side limiting hole 204, and finally the hard plastic guide hose 202 and the soft plastic guide hose 205 are flushed, so that the cleaning efficiency is higher and the cleaning effect is better.

[0030] The no-harm medicine feeding assembly 2 selects different medicine feeding modes according to different medicine feeding, the flushing auxiliary assembly 3 improves the cleaning efficiency, facilitates the next medicine feeding, and the scraping pipe 307 of the flushing auxiliary assembly 3 can temporarily fix the hard plastic guide hose 202 and the soft plastic guide hose 205 during medicine feeding, facilitating the medicine feeding. The two assemblies cooperate with each other, and the effect is better.

[0031] Finally, it should be noted that: the above only for the preferred examples of the present application, and not for limiting the present application, although the foregoing examples of the present application are described in detail, for those skilled in the art, it still can be modified, or the equivalent replacement of part of the technical features described in the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included within the scope of the present application.

Claims

1. A method for administering liquid and solid medications without damaging the esophagus of pigs, characterized in that, The method utilizes an mouth opener (1) and its non-invasive drug delivery component (2) and rinsing auxiliary component (3) to achieve safe administration of liquid and solid drugs, including the following steps: Step 1: Opening and fixing. Place the mouth opener (1) into the oral cavity to keep the upper and lower jaws open. Squeeze the manual inflation bag (219) to inflate the inflation rubber ring (214) through the air inlet pipe (218) and the air distribution pipe (217), thereby forming a stable fixation in the fastening groove (213). Use the anti-slip pad (215) to prevent slippage. Step 2: Select the drainage tubing. Choose either a soft plastic drainage tubing (205) or a rigid plastic drainage tubing (202) according to the type of drug administration. Step 3: Liquid medication administration. Insert the soft plastic drainage tube (205) into the esophagus to the specified depth through the side limiting hole (204), connect it to the sterile syringe (207), and slowly push the medication. After completion, pull out the tube and release the air ring (214). Step 4: Solid capsule feeding. Place the capsule into the front end of the rigid plastic guide tube (202), insert it into the middle limiting hole (201) to the predetermined position, and push the plastic soft rod (203) to send the capsule into the esophagus; Step 5: Rinsing and cleaning. Clean water enters the rinsing hole (301) through the funnel (303), folded tube (304) and rinsing hose (302), and flows to the middle limiting hole (201) and the side limiting hole (204) respectively for rinsing. The scraping tube (307) can remove residues during the extraction of the hose.

2. The method for administering liquid and solid medications to pigs without damaging the esophagus according to claim 1, characterized in that, The mouth opening device (1) is equipped with a non-invasive drug feeding component (2), which includes a central limiting hole (201). The mouth opener (1) has a central limiting hole (201) in the middle, and a rigid plastic flow guide tube (202) is installed inside the central limiting hole (201). A plastic soft rod (203) is movably installed inside the rigid plastic flow guide tube (202). The mouth opener (1) has a side limiting hole (204) near the central limiting hole (201). A soft plastic flow guide tube (205) is movably installed inside the side limiting hole (204). Limiting rings (206) are embedded at the bottom ends of both the rigid plastic flow guide tube (202) and the soft plastic flow guide tube (205). A sterile syringe (207) is connected to the top end of the soft plastic flow guide tube (205).

3. The method for administering liquid and solid medications to pigs without damaging the esophagus according to claim 2, characterized in that, A screw (208) is welded to the middle of the bottom end of the plastic soft rod (203). The top end of the screw (208) is connected to an upper threaded ring (209) by a thread, and the bottom end of the screw (208) is connected to a lower threaded ring (210) by a thread. An extrusion tube (211) is sleeved on the screw (208) between the upper threaded ring (209) and the lower threaded ring (210).

4. The method for administering liquid and solid medications to pigs without damaging the esophagus according to claim 2, characterized in that, The plastic soft rod (203) is movably sleeved with a rubber stop (212) at the top of the rigid plastic flow guide hose (202), and the longitudinal section of the rubber stop (212) is inverted T-shaped.

5. The method for administering liquid and solid medications to pigs without damaging the esophagus according to claim 2, characterized in that, Both ends of the opening device (1) are provided with fastening grooves (213). An inflatable rubber ring (214) is fitted inside the fastening groove (213). An anti-slip pad (215) is glued to the outside of the inflatable rubber ring (214). An air tube groove (216) is provided in the middle of the outer side of the opening device (1). An air distribution tube (217) is embedded inside the air tube groove (216). Both ends of the air distribution tube (217) are connected to the inflatable rubber ring (214). One end of the air inlet tube (218) is connected to the middle of the air distribution tube (217). The other end of the air inlet tube (218) is connected to the air outlet of the manual inflation bag (219).

6. The method for administering liquid and solid medications to pigs without damaging the esophagus according to claim 2, characterized in that, The opening device (1) is an ellipsoid with diameters at both ends smaller than those in the middle. Anti-slip textures are evenly provided on the outer side of the opening device (1). Gradient grooves are provided on the outer side of both the rigid plastic flow guide hose (202) and the soft plastic flow guide hose (205).

7. The method for administering liquid and solid medications to pigs without damaging the esophagus according to claim 2, characterized in that, The opening device (1) is equipped with a flushing auxiliary component (3), which includes a flushing hole (301).

8. The method for administering liquid and solid medications to pigs without damaging the esophagus according to claim 2, characterized in that, The opening device (1) has a flushing hole (301) at one end. A flushing hose (302) is embedded inside the flushing hole (301). A funnel (303) is connected to one end of the flushing hose (302). A folded tube (304) is connected to one end of the funnel (303). A reinforcing ring (305) is attached to the end of the folded tube (304) away from the funnel (303). An end cap (306) is connected to one end of the reinforcing ring (305) by a thread. A scraping tube (307) is attached to both the hard plastic flow guide hose (202) and the soft plastic flow guide hose (205) of the opening device (1).

9. A method for administering liquid and solid medications to pigs without damaging the esophagus, as described in claim 8, characterized in that... The flushing hole (301) connects the middle limiting hole (201) and the side limiting hole (204), and the diameter of the flushing hole (301) is larger than the diameter of the middle limiting hole (201) and the side limiting hole (204).

10. A method for administering liquid and solid medications to pigs without damaging the esophagus, as described in claim 8, characterized in that... The two scraping tubes (307) have the same diameter as the corresponding center limiting hole (201) and side limiting hole (204), and the inner side of the scraping tube (307) is a smooth curved surface.

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