367 results about "Alimentary tracts" patented technology

The invention discloses a livestock feed proportioning method based on livestock growth, and relates to the technical field of feed proportioning, and the livestock feed proportioning method comprises the following steps: collecting the body temperature and motion track data and environmental temperature and humidity data of livestock individuals, monitoring the concentration of amino acids in digestive tracts, preprocessing the collected data, and generating a standardized biological data set; analyzing the compensation amount of vitamins and trace elements according to the metabolic fingerprint spectrum, and constructing a multi-objective optimization function in combination with an individual growth curve; solving the multi-objective optimization function through a quantum annealing algorithm, and matching local raw material inventory data of block chain evidence storage to generate an optimization strategy; and executing the optimization strategy and detecting the mixing uniformity, and when the mixing uniformity index exceeds a preset mixing uniformity threshold, starting the compensation device to adjust the optimization strategy. According to the invention, through a cooperation mechanism of dynamic nutritional requirement identification and multi-constraint optimization, the precise regulation and control capability of livestock breeding is significantly improved.

The invention discloses an integrated front-end driving, active steering and visual digestive tract catheterization system, which belongs to the field of medical apparatus and instruments, and comprises a guide arm comprising a pull wire and an elastic arm, the guide arm is provided with a first end and a second end deviating from each other, and one end of the pull wire is fixedly connected to the first end; the lens is arranged at the first end; the driving part comprises a first annular balloon, a second annular balloon and a cylindrical balloon, and the first annular balloon and the second annular balloon are fixedly connected to the two sides of the cylindrical balloon in the axial direction respectively; when the annular balloon is full, the outer wall expands in the radial direction; when the cylindrical balloon is full, the outer wall extends in the axial direction; the fixing sleeve comprises a flexible sleeve and a connecting base which are fixedly connected, the connecting base is connected with the second end of the guide arm and the first annular balloon, and the end, deviating from the connecting base, of the flexible sleeve penetrates through the driving part and extends in the direction deviating from the guide arm. Through the arrangement, the front end of the nasointestinal tube can be guided and driven at the epiglottis of the nasal cavity and the upper and lower digestive tracts.

The invention belongs to the technical field of probiotic particles, and particularly relates to probiotic particles for improving intestinal functions as well as a preparation method and application of the probiotic particles. The probiotic particles capable of improving the intestinal function comprise a probiotic core, a first embedding layer, a second embedding layer and a third embedding layer, the probiotic inner core is prepared from plant lactobacillus, bifidobacterium animalis, lactobacillus acidophilus, bifidobacterium longum, lactobacillus paracasei, lactobacillus rhamnosus, lactobacillus fermentum, lactobacillus helveticus, streptococcus thermophilus, plant lactobacillus, lactobacillus helveticus and lactobacillus rhamnosus. According to the present invention, the twelve probiotics are contained, and the latest three-layer embedding technology is adopted so as to enhance the storage property and the digestive tract tolerance, such that the product can maintain the beneficial bacterium activity for a long time without refrigeration, and the product is suitable for the crowd with the alteration of the intestinal flora.

The present application relates to the technical field of small molecule drugs, in particular to a isoquinoline drug and its application in improving or treating digestive tract tumors, and aims to provide a compound, a pharmaceutical composition containing the compound and its application in treating colorectal cancer and gastric cancer, and provides a 3,13-position substituted berberine derivative, the drug itself has less toxicity and does not affect the growth of normal human cells, and has a good application prospect in the development of novel antitumor drugs, especially in the development of anti-digestive tract tumor drugs.

The application provides an extendable digestive tract cannula and application thereof, and relates to the technical field of medical devices. The application comprises a first cannula, a second cannula and a degradable material. Opposite ends of the first cannula are a proximal end and a distal end, respectively. The first cannula is sleeved with the second cannula, and a double-layer structure is formed at the distal end of the first cannula. The double-layer structure is fixed by the degradable material. When the degradable material degrades, the second cannula moves towards the end face of the distal end of the first cannula. By setting the movable second cannula, the second cannula moves backward after the degradable material degrades, so that the length of the digestive tract cannula is extended. Since the length of the digestive tract cannula is increased, the area of intestinal absorption is also increased, the compensatory absorption function of the intestine at the distal end of the digestive tract cannula is weakened, the isolation effect of chyme and the intestine is improved, and the digestion and absorption effect of the intestine can be reduced for a long time.

The invention relates to the technical field of probiotics, in particular to lactobacillus salivarius and application of the lactobacillus salivarius in regulating flora balance of digestive tracts of mutton sheep. The invention provides a lactobacillus salivarius KS1018, and the preservation number of the lactobacillus salivarius KS1018 is CCTCC (China Center for Type Culture Collection) NO: M 2025020. The lactobacillus salivarius KS1018 is a strain which is separated from dolang sheep rumen fluid and has the characteristics of high temperature resistance, acid resistance and cholate resistance, and has the advantages of low immunogenicity and high safety when being applied to mutton sheep. Due to the high-temperature-resistant characteristic, high stability can be kept in the feed mixing and processing process, and the application effect is further improved. The acid-resistant and cholate-resistant characteristics can reduce the influence of the digestive tract on the activity of the feed additive, so that the feed additive effectively plays a role in the digestive tract of the ruminant. The strain is good in palatability after being fed, and can effectively regulate digestive tract flora of ruminants, restore digestive tract flora balance and improve the disease-resistant potential of the ruminants.

The present invention discloses a nasogastric feeding device for nursing the digestive tract with anti-backflow, which relates to the field of nasogastric feeding technology, including a feeding device and a hose, wherein the feeding device includes a driving rod and a housing, the upper and lower ends of the housing are respectively provided with end caps and a sleeve, a pressing plate and a mesh plate are installed inside the housing, a cavity is formed between the end cap and the sleeve, a four-way pipe is installed on the end cap, an air pump and a control valve are installed inside the four-way pipe, the pressing plate and the mesh plate are provided with a driving rod, and the four ports of the four-way pipe are respectively connected to the external environment, the cavity, the air pump and the space inside the housing. The present invention performs air extraction before food processing to prevent the liquid food from carrying a large amount of air into the patient's stomach during the infusion period, thereby preventing the patient from experiencing bloating. At the same time, the hose is provided with an anti-backflow mechanism to prevent the phenomenon of gastric fluid backflow due to the patient's body posture.

The invention discloses an intelligent auxiliary diagnosis and grading system for gastrointestinal tumor endoscopic images, which belongs to the technical field of medical image processing and computer-aided diagnosis and comprises a multi-modal image preprocessing and segmentation module, a lesion feature extraction and diagnosis module, a grading and depth evaluation module and a closed-loop feedback optimization module. The system receives white light, a narrow band and an amplified endoscopic image, adaptive segmentation is performed to obtain a lesion area, mucous membrane morphology, capillary and gland features are extracted, Paris classification, Vienna classification and infiltration depth evaluation are realized, and segmentation parameters are subjected to closed-loop optimization according to classification confidence. And intelligent auxiliary support is provided for early diagnosis and treatment decision of gastrointestinal tumors.

The invention discloses a preparation method of an enzyme preparation microcapsule with an intestinal tract slow release function. According to the method, coating wall materials in a specific proportion are adopted, the coating wall materials comprise 10-12 parts of Arabic gum, 4-8 parts of gelatin, 3-6 parts of whey protein, 8-16 parts of beta-cyclodextrin and 5-10 parts of trehalose, the coating wall materials are mixed with 10-15 parts of an enzyme agent, and the enzyme preparation microcapsule is prepared through a spray drying technology. The enzyme preparation microcapsule has excellent thermal stability and gastric juice tolerance, can maintain more than 90% of enzyme activity under the condition of 90 DEG C, and still maintains more than 65% of enzyme activity after being treated in simulated gastric juice for 4 hours. In addition, the enzyme preparation microcapsule has an intestinal directional slow-release function, the enzyme activity is quickly released after entering the intestinal tract for 15 minutes, and the peak value is reached after the enzyme preparation microcapsule enters the intestinal tract for 60 minutes. The method effectively improves the stability and bioavailability of the enzyme preparation in feed processing and animal digestive tract environment, and has good application prospect and market value.

An enhanced hydrogel composition, and a preparation method therefor and the use thereof. According to the composition, a hydrogel is formed by means of a physical cross-linking mechanism using the chelation between calcium ions and an alginic acid raw material, with the assistance of a carboxymethyl cellulose raw material to reduce the sensitivity of the chelation. The hydrogel retains a high water absorption rate of media; meanwhile, the elastic modulus of the hydrogel is significantly enhanced by means of the introduction of silicon dioxide. The method for preparing the composition comprises: dispersing the carboxymethyl cellulose raw material, the alginic acid raw material, and the silicon dioxide in a solution, mixing same uniformly, drying the mixture to obtain a material A, and then mixing the material A with a calcium source to obtain the composition. Further provided is the use of the composition in the preparation of a space-occupying product in the digestive tract.

The invention relates to the technical field of medical image processing, in particular to a super-resolution reconstruction method for optimizing an alimentary canal air-barium double contrast contrast image. Comprising the following steps: acquiring a low-resolution image sequence of digestive tract air-barium double contrast radiography acquired by an image acquisition module; dynamically capturing a long-distance dependency relationship between position image elements in the low-resolution image sequence through a self-attention mechanism, and generating a feature representation reflecting context association between sequence images; based on the feature representation and local detail features in a single image in the low-resolution image sequence, generating a high-resolution image sequence containing more suspected focus detail information; and optimizing the details of the alimentary canal air-barium double contrast contrast image according to the high-resolution image sequence so as to assist in displaying the alimentary canal organ mucosa plica microstructure and the cavity form, thereby completing the super-resolution reconstruction of the alimentary canal air-barium double contrast contrast image optimization. The method obviously improves the image quality of digestive tract air-barium double contrast radiography.

The present invention discloses a digestive tract endoscope specimen collection device, comprising a catheter, a collecting tube provided at one end of the catheter, a shearing assembly provided in the collecting tube, the shearing assembly comprising a fixing groove provided on the inner side of one end of the collecting tube, a rotating card provided with an internal meshing gear in the fixing groove, a plurality of fixing columns evenly provided at one end of the collecting tube, a rotating card provided with a gear on the fixing column, a shearing knife connected to the outer side of the gear, the internal meshing gear meshing with all the gears at the same time, the catheter being connected to the internal meshing gear through a control assembly, and a clamping assembly provided in the collecting tube; the shearing assembly provided in the present invention can seal and store the specimen while the device is cutting and collecting the specimen, and the first traction rope is pulled outward, at this time the first traction rope will pull outward the control board connected to its free end, so that the shearing knife will jointly shear the specimen, and when the shearing is completed, the specimen will be directly stored in the collecting tube, and at this time the clamping assembly can be driven to clamp the specimen and take it out.

The present invention provides an improved breath analyzer and breath test method to determine the presence of disease in humans, including but not limited to, the bacterium H. pylori in a subjects digestive tract. In certain embodiments, the present invention provides a universal breath testing platform and methods of testing for diseases of the gastrointestinal tract, the liver, the kidneys, and the lungs, along with testing for cancer, infections, and metabolic diseases.

The invention is applicable to the technical field of medical instruments, and provides an interventional therapy device for alimentary canal hemorrhage, which comprises an outer sleeve and a guide wire arranged in the outer sleeve, and further comprises a plurality of hemostatic clips, each hemostatic clip comprises a cylindrical body, a ball head is fixed at one end of each cylindrical body, and the other end of each cylindrical body is rotatably connected with two clamping jaws; a guide cavity is formed in the cylindrical body in the length direction, a guide block is slidably connected into the guide cavity, a tension spring is fixed to the end, close to the ball head, of the guide block, and the tail end of the tension spring is fixed into the guide cavity; when a plurality of hemostatic clips are sequentially connected end to end, the two clamping jaws on one hemostatic clip clamp the ball head on the adjacent hemostatic clip, so that the two adjacent hemostatic clips are in ball joint. A plurality of hemostatic clips can be placed in the outer sleeve at a time, a plurality of hemostatic clips can be used in sequence, the outer sleeve and the guide wire do not need to be repeatedly pulled out from a biopsy duct of an endoscope during use, then the surgical efficiency is improved, and surgical operation steps are simplified.

The present application relates to gastrointestinal endoscope accessory technical field, specifically provide a kind of foreign body extraction device for gastroenterology and its manufacturing method, device includes main air pipe and respectively communicated at both ends of main air pipe air bag cup and positive and negative pressure air pump;Air bag cup includes air bag cup framework and membrane structure;Air bag cup framework includes cup body, cup mouth air bag, support air bag, clamping air bag;The upper end of cup body is provided with suction port, and the lower end is communicated with main air pipe, and at least two opposite ends of cup body are provided with inflation port respectively;Suction port is provided with negative pressure valve, and inflation port is provided with positive pressure valve;Support air bag is supported between cup mouth air bag and cup body, and the inside of support air bag located in membrane structure is communicated with clamping air bag.The way of foreign body extraction gastrointestinal tract by negative pressure adsorption, compared with traditional jaw structure, without considering the gap between foreign body and gastrointestinal wall, without adjusting angle or orientation, with the characteristics of high operating efficiency, convenient operation.

The invention relates to the technical field of computer vision and medical image processing, and discloses a digestive endoscopy report generation method and device based on a multi-modal large language model. The method specifically comprises the following steps: for a plurality of upper gastrointestinal endoscopy images, extracting a first image feature through a visual encoder to perform anatomical part identification; extracting a second image feature from the first image feature by using a self-attention mechanism to perform background gastric mucosa classification; generating description about digestive tract diseases through a large language model, and under the guidance of the description, extracting third image features from the first image features to perform digestive tract disease classification; the constructed text instruction about report generation and the third image feature are combined and then input into a multi-mode decoder, and a digestive endoscopy report is generated. According to the method, a plurality of upper gastrointestinal endoscopy image analysis tasks can be processed at the same time, and a digestive endoscopy report which does not depend on a fixed template and has rich context content can be generated with high efficiency and high accuracy.

The invention relates to the technical field of medical devices, in particular to a digestive tract drug delivery system which comprises an intervention module, a drug delivery module and a drug delivery module. Comprising a closing unit and a dosing unit; the parameter acquisition module consists of a first image acquisition unit and a second image acquisition unit which are used for acquiring an image of a point to be applied with medicine, and a third image acquisition unit which is used for acquiring an ultrasonic image of the point to be applied with medicine; and the drug administration control module is used for determining that the operation mode of the drug administration module is a closed mode or a non-closed mode and preliminarily judging whether the closing of the closing unit meets a preset standard according to a closing characteristic value. According to the invention, the precision and safety of administration are improved.

The degradable duodenum bypass stent system comprises a tubular grid stent and a bypass membrane tube, one end of the bypass membrane tube is fixed to the tubular grid stent, the other end of the bypass membrane tube is a free end, the bypass membrane tube is communicated with the interior of the tubular grid stent, and the bypass membrane tube is arranged in the tubular grid stent. Anchor thorns capable of being embedded into a duodenum bulbar mucous membrane are arranged on the tubular grid stent; all components of the degradable duodenum bypass stent system are made of materials which can be degraded in the human digestive tract environment. All the components of the degradable duodenum bypass stent system are made of materials which can be degraded in the human digestive tract environment, the degraded components can be discharged out of the body through excrement, and then a secondary endoscopic extraction operation can be avoided.

The invention relates to an electric field ablation device and ablation system for the digestive tract and application, the electric field ablation device comprises a first rod, a second rod, a supporting piece and an electrode assembly, the second rod is slidably arranged on the first rod in a sleeving mode, and the first far end portion of the first rod is exposed; the supporting piece is fixedly connected between the first far-end portion and the second far-end portion of the second rod, a plurality of electrodes on the electrode assembly are arranged on the supporting piece, the supporting piece can be switched between the expansion state and the contraction state by driving the first rod and the second rod to slide relatively, the structure is simple, and operation is convenient. When the supporting piece is in the expanded state, the electrode is exposed out of the surface, away from the first rod, of the supporting piece and can be tightly attached to the tissue of the digestive tract, and therefore accurate ablation treatment can be achieved for treating diabetes or obesity.

The invention discloses panda-derived tryptophan-producing streptococcus non-lactolyticus C49 and application thereof, and belongs to the field of microorganisms, the strain is preserved in Guangdong Microbial Culture Collection Center, and the preservation number is GDMCC No: 67209. The strain has good acid-resistant and cholate-resistant characteristics, and can ensure that enough biomass passes through stress of a digestive tract environment; whole genome sequencing finds that C49 is significantly related to the pathway and module of tryptophan biosynthesis. Whole genome sequencing and in-vitro fermentation confirm that C49 has tryptophan biosynthesis capability, and in-vivo animal tests confirm that C49 has synthetic nerve conditioning capability. Therefore, as a probiotic feed additive, the streptococcus non-lactolyticus C49 has a good application prospect in the aspects of improving the feed value, improving the intestinal health of animals, enhancing the immunity of organisms and the like.

Use of a bitter melon exosome and an oral medicament prepared therefrom. The bitter melon exosome obtained from the bitter melon juice can be used for preparing a pharmaceutical formulation embedding a protein, a polypeptide, a small molecule peptide, a nucleic acid, or a small molecule compound. The compositions of the oral medicament of the present invention comprise the bitter melon exosome and an active pharmaceutical ingredient encapsulated in the bitter melon exosome. The bitter melon exosome is suitable for preparing a drug that is easily damaged by the gastrointestinal tract and is mostly administered by means of an injection route into an oral agent, and the oral agent can produce a similar therapeutic effect to that of the injection administration route by oral administration, and is convenient to use. The extraction method for the bitter melon exosome is simple and has a low cost. Moreover, the bitter melon exosome has no immunogenicity, has relatively high biocompatibility and biosafety, and has relatively strong tolerance to gastric acid and digestive tract proteolytic enzymes, and intestinal barrier permeability.

There is provided a partitioning device to partition a hollow organ of a digestive tract of a patient in the context of digestive surgeries. The partitioning device includes a magnet assembly implantable into an abdominal cavity of the patient, the magnet assembly including a plurality of magnet elements flexibly connected in series. The magnet assembly is configured to be positioned extraluminally around at least a portion of an outer surface of the hollow organ to magnetically couple opposite magnet elements together to compress opposite walls of the hollow organ therebetween until opposite walls of the hollow organ are fused together, thereby partitioning the hollow organ. The magnet elements can be received in a housing and have various shapes. The partitioning device can include additional features such as a leading elongated member that can aid in the positioning of the partitioning device, and a trailing elongated member.

Disclosed herein are methods for administering a dose of a microbiota recovery therapy composition by colonoscopy. The methods disclosed herein are useful for the treatment of diseases and / or conditions of the digestive tract, such as Clostridium difficile infection (GDI), including recurrent GDI, and other gastrointestinal disorders. The method can result in improved quality of life. These methods are capable of altering the gut microbiota composition and / or the gut metabolome composition. The microbiota recovery therapy composition comprises a fecal microbiota suspension comprising: a fecal microorganism derived from a human fecal sample, and a solution of polyethylene glycol and brine.

A magnetically-tracked catheter system having a catheter and a magnetic beacon. The catheter has a proximal end and a distal end. The catheter includes a first magnetic sensor disposed at (i.e., near) the distal end. The magnetic beacon is configured to be disposed external to an individual and in a target zone. An operator interface is in electronic communication with the first magnetic sensor. The catheter may further include a guide lumen (and / or other lumen or lumens) extending between the proximal end and the distal end and the configured for use with a guidewire. The catheter may include an occlusion member configured to occlude a vessel or other passage of an individual (e.g, respiratory tract, gastrointestinal tract, etc.).

The application provides an ultrasonic endoscope for detecting digestive tract walls, which comprises a shell, a conveying device, a liquid storage box, a liquid outlet head, a detachable shell and a camera main body; the conveying device is arranged in the interior of the shell; the liquid storage box is arranged in the interior of the shell and on one side of the conveying device; the liquid outlet head is arranged on one side of the conveying device; the detachable shell is arranged at one end of the shell; and the camera main body is installed in the interior of the detachable shell. The ultrasonic endoscope for detecting digestive tract walls can be quickly disassembled and has liquid medicine convenient to replace, through the detachable structure of the liquid storage box and the mounting bracket; the liquid path can be quickly disassembled and sealed without liquid leakage, through the threaded joint structure of the communication sleeve and the communication head; the liquid can be supplemented without disassembling the liquid storage box, through the use of the filling head structure, and the use convenience is improved; the camera main body can be disassembled and washed and is convenient to disinfect, through the split structure of the detachable shell and the transparent cover; and the liquid is automatically supplied, through the conveying pump.

A medical instrument is used for a device, a system and application of digestive tract electric field treatment and comprises a long and thin rod, a sleeve and an expandable component, the expandable component comprises a plurality of supporting rods and an electrode array film, when the long and thin rod slides forwards to a front limit position relative to the sleeve, the expandable component is in a contraction working state, and when the electrode array film slides forwards to a rear limit position relative to the sleeve, the expandable component is in a contraction working state. Each supporting rod is tightly attached to the outer surface of the slender rod; when the slender rod slides backwards relative to the sleeve from the front limit position, the expandable component is in an expanded working state, the front section supporting rods and the rear section supporting rods are in an unfolded umbrella shape, and the electrode array film is in an unfolded state. The device is used for ablating tissues of the alimentary canal and treating diseases such as diabetes mellitus and obesity.

The utility model discloses a pair of rotatable foreign body forceps, which relates to the field of medical instruments and comprises a forceps end, a handle end and a connecting wire. At least two rotating grooves are formed in the outer end of the pliers end, pliers are installed in the rotating grooves in a rotating fit mode, and torsional springs are installed between the pliers and the rotating grooves in an abutting mode. At least two sliding grooves are formed in the outer side walls of the pliers ends, sliding blocks are installed in the sliding grooves in a sliding fit mode, protruding blocks are formed on the inner sides of the pliers, and pull ropes are fixedly installed between the protruding blocks and the sliding blocks. The connecting line is installed between the clamp end and the handle end, at least two steel wires are installed in the connecting line in a clearance fit mode, and one end of each steel wire is fixedly installed on the sliding block; after the forceps end extends into the digestive tract, the angle of the forceps end can be controlled through rotation of the handle end, and direction control is achieved; when the foreign matter is aligned, the steel wire is pulled to move the sliding block, so that the pliers are controlled to rotate inwards to clamp the foreign matter; the opening and closing angle of the single pliers can be controlled by pulling the single steel wire, and the opening and closing angle of each pliers can be independently controlled.

The invention discloses a cleaning device for a laying hen breeding feed trough, and relates to the technical field of laying hen breeding. The cleaning device comprises a carrying plate and is characterized in that a mashing mechanism is arranged at a feeding port of a suction mechanism; the adjusting mechanism is arranged on the loading plate, one end of the adjusting mechanism is fixedly connected with a scraping and washing mechanism, the scraping and washing mechanism is arranged on one side of the material suction mechanism, during working, the material suction mechanism sucks feed in the feed trough into the separation mechanism, and the separation mechanism automatically and effectively separates chicken feathers mingled in the feed from the feed; by means of the design, the problem that chicken feathers are polluted during feed recycling is solved, meanwhile, the situation that alimentary canals are injured due to the fact that chicken flocks peck the feed containing the chicken feathers is prevented, compared with manual cleaning or traditional cleaning equipment, the device can synchronously complete feed cleaning and chicken feather separation, the follow-up sorting procedure is reduced, the labor intensity is remarkably reduced, and the working efficiency is improved. And operation of workers is facilitated.

The invention relates to a colon-targeted micro-ecological regulation composition. The colon-targeted micro-ecological regulation composition is prepared by compounding the following functional components in percentage by weight: 5-95% of a component A, 1-15% of a component B and 4-94% of a component C, the component A is resistant starch, the polymerization degree DP is greater than or equal to 15, and the crystallinity is greater than or equal to 35%; the component B is probiotics and is embedded through a complex coacervation method or an extrusion-gel method, the embedding rate is larger than or equal to 75%, and the particle size is 200-800 microns; the survival rate is greater than or equal to 60% after treatment in simulated gastric juice for 2 hours, and the survival rate is greater than or equal to 50% after treatment in simulated intestinal juice for 4 hours; the component C comprises functional nutritional auxiliary materials, the functional nutritional auxiliary materials comprise prebiotics and a medicinal and edible composition, and the prebiotics comprise rapid fermentation type prebiotics, medium-speed fermentation type prebiotics, slow fermentation type prebiotics and a non-fermentation type water-holding expansion component. By constructing a carbon source slow release-flora orientation-metabolism regulation ternary interaction collaborative network, accurate regulation and multi-target metabolism intervention of the whole digestive tract are realized.

The utility model relates to the technical field of foreign body forceps, and discloses a pair of foreign body forceps for the digestive system department, which comprises a hollow strip rod, a clamping mechanism is arranged on the hollow strip rod, an expansion protection mechanism is arranged on the hollow strip rod and the clamping mechanism, the clamping mechanism comprises a hollow plate, the hollow plate is fixedly connected to the left end of the hollow strip rod, and the hollow plate is fixedly connected to the right end of the hollow strip rod. The expansion protection mechanism comprises a hollow block. By means of the design of the elastic air bag, the elastic air bag is extruded, air in an inner cavity of the elastic air bag can be conveyed into an inner cavity of the hollow block through the air pipe, the air enters the hollow cylinder accordingly, the sealing sliding block is pushed by air pressure to slide in the inner cavity of the hollow cylinder, and the arc-shaped expansion plate is unfolded; the contact surface of the arc-shaped expansion plate and the inner side wall of the digestive tract is arc-shaped, so that the digestive tract can be further expanded in the process of extracting the arc-shaped expansion plate, and the influence on the digestive tract can be avoided to the greatest extent.