87 results about "Digestive tract" patented technology

The invention provides a digestive tract reconstruction device for protecting an anastomotic stoma, and relates to the field of medical instruments. The device comprises a nail anvil assembly, a nail bin assembly, a connection closing assembly and an anastomotic stoma protection assembly. A rotary guide mechanism is arranged in the nail bin assembly and drives the nail anvil assembly to rotate by a preset angle during axial movement, so that the short shaft of the oval nail anvil is aligned with the long shaft of the anastomotic stoma and exits without interference. And barbs are arranged in the cutting knife to hang and cut tissues, so that the nail anvil can be greatly overturned. The anastomotic stoma protection assembly comprises a degradable gasket and a folding flow guide tube, and the flow guide tube retreats and is unfolded along with the nail anvil to cover the anastomotic stoma and isolate pollutants. The mechanical injury of the anastomotic stoma when the nail anvil is withdrawn can be avoided, and the risks of infection, bleeding and leakage of the anastomotic stoma after operation are effectively reduced.

The invention relates to the technical field of medical instruments, in particular to a breaking device for blood clots in a digestive tract, an inner guide shaft is arranged in a catheter in a penetrating mode, a breaking head comprises a breaking cutting strip connected between an end piece and the catheter, and the breaking cutting strip is in an initial state that the breaking cutting strip elastically stretches and is folded at the periphery of the inner guide shaft. The end of the crushing head extends into the digestive tract through one end of an endoscope clamp channel, the movable finger ring is pulled upwards in the length direction of the handle, the movable finger ring drives the inner guide shaft and the end piece to synchronously and transversely move, so that the crushing cutting strips are in the state of being elastically bent and opened outwards, namely the crushing head is in the shape of an opened lantern, and then the crushing cutting strips are crushed by rotating the handle or the movable finger ring in the axial direction. The crushing head is driven to integrally and synchronously rotate, the crushing cutting strip on the outermost ring can push away digestive tract mucosa tissue to prevent mucosa from being damaged, the crushing cutting strip on the inner ring rotates around the inner guide shaft at a low speed, blood clots are crushed through a rotary cutting method, and the crushing effect is good.

The invention provides a positioning device for an alimentary canal lesion endoscope, and relates to the technical field of alimentary canal endoscopes, the positioning device comprises an endoscope pipeline, an adjusting mechanism facilitating adjustment is arranged on the endoscope pipeline, a supporting mechanism facilitating positioning is arranged on the endoscope pipeline, and the adjusting mechanism comprises a protective hollow column and a mounting column; the supporting mechanism comprises an endoscope probe, a first adjusting pipe and a suction cup, the protective hollow column is slidably mounted at the circumferential end of the endoscope pipeline, and the mounting column is fixedly mounted at the circumferential end of the endoscope pipeline. By arranging the umbrella type supporting structure composed of the first adjusting tube, the second adjusting tube and the universal joint, the actual interior of the digestive tract is not a flat environment, natural wrinkles exist on the stomach wall, the intestinal mucosa fluctuates in a concave-convex mode, and individual differences exist in the forms of the digestive tracts of different patients; the multi-point supporting design of the umbrella type structure enables a plurality of supporting point positions to be respectively attached to mucous membranes at different positions around the focus.

The utility model discloses a mould is placed under the mould of simulation ultrasonic real -time guidance of nasal -intestinal tube, including the digestive tract simulation body of simulation esophagus, stomach, duodenum and jejunum, it adopts the flexible material of ultrasonic wave penetration, front surface is not transparent, back surface is transparent, and its inside esophagus is used for filling air, and the part except esophagus is used for filling liquid, the digestive tract simulation body is fixed between two organic glass, front surface is not transparent, back surface is transparent, the organic glass of front surface opens at esophagus place, antrum gastricum place respectively, as the acoustic window of ultrasonic, is used for the inflation sign of esophagus and antrum gastricum nasal -intestinal tube catheter tip cloud sign of ultrasonic observation when placing nasal -intestinal tube respectively, is provided with many resistance positions at stomach and duodenum, for making nasal -intestinal tube catheter tip forward into the obstruction. The utility model can simulate the sign of ultrasonic under different conditions on the mould, effectively simulates the actual entering process of nasal -intestinal tube under the real -time guidance of ultrasonic, and facilitates simulation teaching demonstration.

The invention relates to the technical field of biological materials, and provides an absorbable self-repairing suture line for maintaining the stability of a mechanical biological microenvironment and a preparation method of the absorbable self-repairing suture line. According to the suture line, an absorbable high polymer material is adopted as a matrix, and PLA microcapsules containing a medical-grade cyanoacrylate n-octyl ester repairing agent are uniformly dispersed in the matrix through a melt blending spinning process. When the suture line generates microcracks at dynamic tissue parts such as cardiovascular and digestive tracts due to periodic stress, the stress at the tip of the cracks enables the microcapsules to be broken to release the repairing agent, rapid in-situ polymerization occurs under triggering of tissue fluid, the self-repairing efficiency of 90% or above is achieved, and the strength retention rate of 95% or above is maintained in the key rehabilitation period of the suture line. The defect that a traditional absorbable suture line is prone to fatigue fracture in a dynamic environment is overcome, the mechanical integrity is actively maintained through an intelligent self-repairing mechanism, all components can be completely degraded and absorbed, and a safer and more reliable solution is provided for dynamic tissue repairing.

The present application relates to the technical field of biological medicine, and discloses a preparation method of ganoderma lucidum broken wall superfine powder for female insomnia, after the ganoderma lucidum thick piece is treated by the processes of spraying moistening, hot pressure steam heating, ultrasonic treatment and microwave drying, the content of polysaccharide, triterpene and sterol is improved, and the release rate of active ingredients is also significantly improved. The structure of the ganoderma lucidum mycelium cell wall is damaged by the present application technology, so that the active ingredients such as polysaccharide, triterpene and sterol originally existing in the ganoderma lucidum can be easily extracted and released. The ganoderma lucidum cells are loosened and broken in the present application, and the polysaccharide in the combined state can be changed into the free state, so that the content of the ganoderma lucidum polysaccharide can be greatly improved. The active ingredients in the ganoderma lucidum can be quickly and maximally released in the digestive tract by directly taking the broken wall superfine powder of the broken cells, so that the effect of the superfine powder on improving female insomnia is improved.

The utility model provides a metal support for intestinal canal anastomosis and anastomotic leakage, which relates to the technical field of medical instruments and comprises a metal support, a drainage tube and a support release device, the metal support is arranged in the support release device before being released, and the metal support is dumbbell-shaped after being released and comprises a first raised section, a second raised section and a groove section, the groove section is a double-layer metal net and comprises an inner-layer metal net and an outer-layer metal net, a space is formed between the inner-layer metal net and the outer-layer metal net, the inner face and the outer face of the metal support are both wrapped with silica gel coatings, a plurality of round holes communicated with the space are formed in the silica gel coating of the outer-layer metal net, the drainage tube is connected with the groove section, and the interior of the drainage tube is communicated with the space. After being released, the metal stent can block a digestive tract ventage or support liquid secreted by an anastomotic stoma, intestinal mucosa, blood vessels and ventage tissue, the liquid can enter the space between the two layers of metal stent nets through the round holes in the silica gel coating of the outer-layer metal net and is sucked out by negative pressure, cleanliness of the anastomotic stoma and the ventage can be kept, and healing of the anastomotic stoma and the ventage is promoted.

The invention belongs to the technical field of medical instruments, and particularly relates to a child digestive tract foreign matter flexible clamping device which comprises an endoscope body, a flexible pipe is fixed to one end of the endoscope body, and a biopsy channel is formed in the flexible pipe. The multi-form clamping module is assembled in the biopsy channel in a sliding mode, the multi-form clamping module comprises a forceps rod, a driving guide wire, a first forceps head, a second forceps head, a third forceps head and a fourth forceps head, and the forceps rod is assembled in the biopsy channel in a sliding mode. Through a dual-mode clamping structure of the V-shaped clamp type clamping unit composed of the first clamp head and the second clamp head and the parallel type clamping unit composed of the third clamp head and the fourth clamp head, clamping modes can be flexibly switched according to the shapes of foreign matters; the device can adapt to child alimentary canal foreign matters in various forms such as flat, regular, circular and irregular shapes, and the clamping application range is greatly expanded.

The application relates to the technical field of digestive tract detection, and discloses a digestive tract detection system based on artificial intelligence, which comprises a data acquisition unit, a preprocessing unit, a feature extraction unit, an abnormality detection unit and a result display unit. The application focuses on endoscopic images, accurately preprocesses the images into grayscale images and normalizes the grayscale images, reduces data complexity, highlights textures, and is beneficial to subsequent analysis; the application effectively extracts texture features, quantitatively presents subtle changes, accurately identifies lesions, scientifically judges abnormalities according to thresholds and displays the abnormalities, and realizes automatic and standardized detection. Meanwhile, physiological indexes are introduced, multidimensional data is integrated, and the function of the digestive tract is comprehensively reflected; the indexes are finely processed, individual differences and dynamic changes are considered, abnormal fluctuations are captured, and diseases are early warned; the application accurately detects abnormalities, cooperatively displays image and index results, and helps medical staff comprehensively judge. The application comprehensively and deeply detects, improves the accuracy of early screening, efficiently comprehensively diagnoses, has wide clinical applicability, promotes intelligent and accurate diagnosis and treatment, and the like.

The embodiment of the invention provides a suture member capable of stopping bleeding of a mucous membrane defect part and promoting healing of the mucous membrane defect part. A suture member (100A) for suturing a mucosal defect part of a digestive tract wall, the suture member (100A) being configured so as to have: an annular wire (110) branched into two parts from an annular wire base end part (120) and formed in an annular shape by connecting to an annular wire tip end part (130) facing the annular wire base end part (120); and a cylindrical member (500) fitted over the annular wire (110) so as to be slidable in the direction from the annular wire base end (120) toward the annular wire tip (130), the annular wire (110) forming a ring part (200) further toward the tip side than the cylindrical member (500), and the annular wire (110) being disposed so that the substantially central part of the ring part (200) overlaps the substantially central part of the mucous membrane defect part. The annular wire (110) has a wire (for example, a bridge wire (300)) disposed above the mucous membrane defect portion, and the cylindrical member (500) is externally fitted to the annular wire (110) and the wire (for example, the bridge wire (300)) disposed above the mucous membrane defect portion.

The invention belongs to the technical field of digestive tract mucosa protective agents, and relates to a product with the efficacy of preventing and treating digestive tract mucosa injury and a preparation method thereof. The functional component of the product is hydrophilic adhesive material powder, the particle size of the powder is 50-200 meshes, or the functional component is colloid formed after the hydrophilic adhesive material absorbs water and swells, and the viscosity of the colloid is 5-200 cp; the hydrophilic adhesive material is more than one of caesalpinia spinosa gum, Arabic gum, guar gum, konjac gum, carrageenan, tragacanth gum and xanthan gum with specific viscosity. The preparation method comprises the following steps: uniformly mixing the raw materials, grinding, screening until the particle size is 50-200 meshes, and packaging, or adding the raw materials into water until the raw materials absorb water and swell to form colloid with the viscosity of 5-200cp, and packaging. The product takes effect quickly, has no side effect, is simple in preparation method and is suitable for large-scale preparation.

The invention discloses a digestive tract tumor biopsy sampling device convenient for puncture and sampling for medical oncology, which relates to the technical field of tumor biopsy sampling and comprises a biopsy device, a limiting seat and a base. According to the alimentary canal tumor biopsy sampling device convenient to puncture and sample for the medical oncology, tumor tissue can be accurately contained through the sampling groove, fragmentation of a tumor tissue sample is avoided, it is guaranteed that the tissue sample meets the tissue form needed by detection, the sample quality is guaranteed, the outer sleeve needle covers the sampling groove after sampling, the sample can be fixed and cannot fall off, and the sampling efficiency is improved. The tissue is prevented from remaining in the body or being polluted during withdrawing, and meanwhile the risks of bleeding and tissue damage in the puncture process are reduced; enough samples can be obtained through one-time operation, the repeated puncture frequency is reduced, the operation time is shortened, the pain of a patient is relieved, and the operation efficiency is improved; and the modularized puncture needle design allows medical staff to quickly adjust the puncture depth according to individual differences, and the flexibility is high.

The invention discloses application of alpha-cyanoacrylate n-butyl ester tissue glue in treatment of diverticulum of digestive tract. The tissue glue is used for preparing a medicine for treating the diverticulum of the digestive tract; during treatment, the diverticulum is injected through an endoscope, tissue glue makes contact with tissue fluid to be rapidly polymerized, the diverticulum is sealed, diverticulum complications are prevented, biocompatibility is good, degradation is achieved, no residues exist, the treatment effective rate is 100%, no complications exist, and the recurrence rate is low.

The invention discloses freeze-dried particles as well as a preparation method and application thereof. Comprising a quadruple embedded probiotic system which comprises a core containing live probiotics, a first gel protection layer, a polyelectrolyte multilayer film and an external bacterial cellulose barrier layer from inside to outside; and at least one functional raw material subjected to fermentation treatment. Wherein the particle has a double-layer structure and comprises an outer layer and an inner core, and the outer layer comprises pH responsive gel. According to the freeze-dried granules as well as the preparation method and the application thereof, the survival rate of probiotics in processing and digestive tracts is remarkably increased, and precise release and colonization in intestinal tracts are realized; the activity and bioavailability of functional components are effectively improved through a fermentation process, and the comprehensive effect of regulating intestinal flora and energy metabolism is enhanced; meanwhile, the drying efficiency is greatly improved by the production process, and the stable porous structure and the rapid rehydration property of the product are ensured.

This invention belongs to the field of medical device technology and discloses an endoscope. The endoscope includes a serpentine joint, an instrument channel, and a camera core wire. A traction wire threading structure is provided on the serpentine joint for the traction wire to pass through. The wall thickness of the traction wire threading structure on the side facing the center of the serpentine joint is less than the wall thickness on the side away from the center of the serpentine joint. The instrument channel is disposed within the serpentine joint, forming a cavity. The axis of the instrument channel is parallel to the axis of the serpentine joint. This embodiment of the endoscope can increase the internal space of the serpentine joint while effectively reducing the outer diameter of the serpentine joint, allowing the endoscope to enter extremely narrow cavities at lesion sites, such as the digestive tract of pediatric patients or severely narrowed lesion areas. This provides opportunities for observation and treatment of these patients, increasing the product's market coverage and application scenarios.

This invention belongs to the field of medical device technology, specifically relating to a pediatric gastrointestinal lavage device. The device includes a gastric lavage machine body with a placement groove inside. A flushing connector is located at the upper end of the placement groove. It also includes a gastric tube comprising an inner tube and an outer tube. The inner tube is sleeved on the outside of the flushing connector, and the outer tube is coaxially disposed on the outside of the inner tube. The sidewall of the inner tube has multiple flow-blocking holes spaced evenly along the axial direction. These flow-blocking holes are composed of multiple clearance holes located in the same radial cross-section. This invention, by setting an elastic flow-blocking membrane adapted to the flow-blocking hole array on the inner tube, allows the device to automatically reduce the effective flow diameter of the tube when the negative pressure exceeds a threshold, achieving precise flow restriction and pressure reduction, and preventing damage to the delicate gastric mucosa of children due to high negative pressure.

The invention relates to the technical field of digestive tract detection, and discloses an artificial intelligence-based digestive tract detection system, which comprises a data acquisition unit, a preprocessing unit, a feature extraction unit, an anomaly detection unit and a result display unit, and focuses on an endoscopic image, the endoscopic image is accurately preprocessed and converted into a grey-scale image, and the grey-scale image is normalized, so that the data complexity is reduced, the texture is highlighted, and the detection accuracy is improved. Subsequent analysis is facilitated; texture features are effectively extracted, subtle changes are quantitatively presented, lesions are accurately recognized, abnormity is scientifically judged and displayed according to threshold values, and automatic and standardized detection is achieved. Meanwhile, physiological indexes are introduced, multi-dimensional data are integrated, and the digestive tract function is comprehensively reflected; the indexes are finely processed, individual and dynamic changes are considered, and abnormal fluctuations are captured to early warn diseases; abnormalities are accurately detected, images and index results are cooperatively displayed, and medical care is helped to comprehensively judge. Omnibearing deep detection is achieved, early screening accuracy is improved, comprehensive diagnosis is efficient, clinical applicability is wide, and diagnosis and treatment intelligentization and precision are promoted.

1. Name of the product in this design: Handle of clamp device for endoscope. 2. Purpose of this design: To be used in conjunction with an endoscope for placing clamps inside the digestive tract. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The utility model relates to a medical instrument for operation, in particular to a target positioning system for digestive tract operation, which comprises a target holder capable of entering the body of a patient through a digestive channel and clamping at an operation target, and the target holder is provided with a light source capable of sensing electric energy to emit light; the wireless power supply device is used for supplying electric energy to the target point clamping device in a wireless power supply mode; during a digestive tract operation, the target holder clamps an operation target in a digestive channel, the wireless power supply supplies electric energy outside the digestive channel, and the target holder sensing the electric energy emits visible light in the digestive channel. According to the utility model, based on the electromagnetic induction cooperation between the wireless power supply and the target holder, the target holder in the digestion channel can generate visible light, so that the target holder in the digestion channel can quickly and accurately generate visible light to perceive the position of an operation target, and meanwhile, the magnetic field interference on the application of other metal instruments is basically avoided; the safety and the feasibility are good.

The present application relates to the fields of animal nutrition and microbial fermentation technology, and particularly relates to a strain of Saccharomyces boulardii, a microecological preparation thereof and application thereof.The Saccharomyces boulardii is named as NCUTY 002, has been preserved in China Center for Type Culture Collection, and the preservation number is CCTCC NO:M 2025648.The Saccharomyces boulardii NCUTY 002 screened in the present application has excellent acid tolerance (pH≤2.5) and bile salt tolerance (0.5%), and shows high self-aggregation capacity, so that it can survive and stably colonize in the extreme environment of digestive tract of egg ducks, and can be used as a special feed additive for egg ducks.

The application discloses a polypeptide pka15 with immunoregulation efficacy and application thereof. The polypeptide pka15 provided by the application has immunoregulation efficacy, can significantly reduce the number of macrophages and neutrophils at an inflammation site, and can be used for preparing a medicine for relieving and / or treating autoimmune diseases and allergic diseases caused by inflammation. Meanwhile, the polypeptide pka15 can significantly improve the symptoms of IBD, has the efficacy of improving damage to a digestive tract mucosa, can be used for preparing a medicine for relieving and / or treating inflammatory bowel disease and a medicine for protecting and / or repairing damage to the digestive tract mucosa, can be synthesized by a biological or chemical method, is easy to be prepared in a large amount, has simple synthesis, can be prepared into a polypeptide preparation, is convenient for subsequent clinical application and popularization, has no toxic side effects, has better safety as compared with existing glucocorticoid and non-steroidal immunoregulation medicines, and has low medicine cost and good curative effect.

A synthetic resin stent is able to demonstrate self-extensibility, restorability, adhesion to the digestive tract, and ability to follow peristaltic movement. The synthetic resin stent is provided with: a first stent that has a first stent body formed as a cylindrical mesh from fibers made of synthetic resin, and that can be deformed from a reduced-diameter state to an expanded-diameter state; and a second stent that is formed as a cylindrical mesh which is finer than that of the first stent body, is arranged so as to cover the outer periphery of the first stent body, and can be deformed from a reduced-diameter state to an expanded-diameter state.

The application provides application of a DPP-4 inhibitor in preparation of a medicine for preventing and / or treating digestive tract stenosis, and belongs to the technical field of medicines. Based on morphological performance of stenosis segment esophageal tissue outer membrane scar fibrosis, it is found that a DPP-4+ fibroblast subpopulation in stenosis segment esophageal outer membrane fibrosis hyperplasia tissue is obviously highly expressed. The DPP-4 inhibitor can prevent and treat refractory stenosis after esophageal ESD operation through anti-inflammatory and anti-fibrosis effects on stenosis segment esophageal outer layer tissue, and is a powerful supplement to the current esophageal ESD postoperative stenosis which focuses on intraluminal prevention and treatment of esophageal submucosa and part of inherent muscle layer scar fibrosis.

The invention relates to the technical field of microorganisms, and discloses a lactobacillus zeae strain and an application thereof, and the preservation number of the lactobacillus zeae strain is CGMCC (China General Microbiological Culture Collection Center) NO.26771. The lactobacillus zeae strain has the advantages that the lactobacillus zeae strain can be used for preparing a lactobacillus zeae strain; the lactobacillus zeae provided by the invention has the effects of inhibiting the activity of pathogenic bacteria, reducing inflammatory factors, inhibiting alveolar bone resorption and regulating digestive tract flora.

The invention discloses a drinking health risk assessment method based on acetaldehyde metabolism load, and relates to the technical field of health risk assessment. Comprising the following steps: selecting a key gene in an alcohol metabolic pathway, and screening known functional single nucleotide polymorphism (SNP) sites in the key gene; performing binary assignment on each selected SNP site according to the influence of the genotype of the SNP site on the acetaldehyde metabolism load; respectively calculating a liver acetaldehyde load index and a digestive tract acetaldehyde load index, and summing to obtain a total acetaldehyde load index; performing risk grading on the drinking health risk according to the total acetaldehyde load index; and analyzing the association between the alcohol intake and the disease risk by using a multivariable Cox proportional risk regression model, verifying the effect modification effect of the acetaldehyde load index, and carrying out risk stratification assessment. According to the method, the individual drinking health risk can be accurately evaluated by integrating alcohol metabolism related polygene genetic characteristics.

1. The name of the design product: a mirror feeding table for a control system of a surgical instrument for a digestive tract endoscope. 2. The use of the design product: for the mirror feeding operation of a double-channel endoscope in a digestive tract endoscope surgery, and for feeding the endoscope and surgical instruments to a designated position. 3. The design points of the design product: in shape. 4. The picture or photo best indicating the design points: perspective view 1.

The invention relates to the technical field of medical instruments, and discloses a safe retraction mechanism for a digestive tract puncture needle. The mechanism takes a hollow tube body as a core base body, one axial end of the hollow tube body is fixedly connected with a flexible guide tube, and one radial side is fixedly connected with a medical functional catheter; a puncture assembly is slidably installed in the hollow pipe body, an axial guide groove is formed in the inner wall, and an axial boss on the peripheral wall of the puncture base is matched with the guide groove. The puncture assembly comprises a puncture base and a puncture needle body fixed to one end of the puncture base, and the needle body is arranged in the flexible guide pipe in a penetrating mode and forms a support. A pull-back rod is fixed on the puncture base, one end of the pull-back rod extends out of the hollow tube body, and a rod body is sleeved with a pre-stretching pull-back spring to provide retraction power; the pull-back rod is assembled with the recovery mechanism and comprises a locking base, a clamping assembly and a retraction triggering piece. After puncture is completed, the clamping assembly is unlocked and linkage is released through the pull-back spring, rapid retraction of the needle point is achieved, the end opening of the guide pipe is sealed in cooperation with the elastic contraction ring, dual protection is formed, puncture wounds are effectively avoided, and medical safety specifications are met.

Provided are Christensenellaceae, and a composition and a pharmaceutical use thereof. The Christensenellaceae can be used for treating or preventing liver function damage and related diseases, digestive tract mucosa damage and related diseases, diabetes, obesity, and related diseases. The Christensenellaceae can also be used in combination with hypoglycemic and lipid-lowering drugs, and has a synergistic effect on liver function damage and related diseases, diabetes, and obesity and related diseases.

The present disclosure relates to a double salt, a preparation method therefor, and a pharmaceutical composition containing same. More specifically, the present disclosure relates to a double salt consisting of magnesium ions, monovalent metal cations, phosphate ions, optional hydrogen phosphate ions, and optional hydroxide ions. The present disclosure further relates to a method for preparing the double salt, a pharmaceutical composition containing the double salt, a kit containing the pharmaceutical composition, the use of the double salt in the preparation of a drug for reducing the level of ammonia and / or ammonium ions and / or urea in the blood and / or digestive tract of a subject and preventing and / or treating a disease or condition associated therewith, and a method for preventing and / or treating a related disease or condition.

The utility model relates to the related technical field of clinical medical treatment, in particular to a novel hemostasis drainage catheter which comprises a drainage catheter body, and medical sponge is tightly attached to and connected with the outer side surface of the drainage catheter body. According to the novel hemostasis drainage catheter, the traction wire is fixed in the medical sponge, the drainage device can be fixed to the skin surface in the hemostasis drainage process, the hemostasis drainage catheter is prevented from sliding, certain micro-negative pressure can be kept through the self-expansion and wound surface attaching adsorption effect of the sponge, and the hemostasis drainage effect is achieved; in addition, the adsorption effect of the medical sponge can be utilized, medicine carrying and stable administration can be achieved, the medicine does not need to enter other parts in the body, such as the digestive tract and the blood circulation system, side effects of the medicine on the human body are greatly reduced, and a larger medicine selection space is provided for doctors.