74results about How to "Resolve infection" patented technology

The invention relates to ainsliaea fragrans champ caffeoylquinic acid extracts and preparation and application thereof. The ainsliaea fragrans champ caffeoylquinic acid extracts are prepared by the following steps of: performing refluxing extraction of the ainsliaea fragrans champ by using ethanol, filtering, concentrating and removing ethanol, adjusting the pH value to 1 to 3 by adding hydrochloric acid, applying macroporous adsorbent resin, water-washing, adding ethanol for gradient elution, and collecting eluent, of which the ethanol concentration is 50 to 70 percent; performing condensation and ethanol removal, adjusting the pH value to 1 to 3 by adding hydrochloric acid, using macroporous adsorbent resin, adding water and ethanol for gradient elution respectively, and collecting the eluent, of which the ethanol concentration is 40 to 70 percent; mixing the eluent, and vacuum drying the eluent to obtain the extracts. The UV content of the ainsliaea fragrans champ caffeoylquinic acid extracts is over 70 percent, the HPLC content is over 50 percent, and the content of 3-caffeoylquinic acid and the content of 3,5-dicaffeoylquinic acid are both over 10 percent. The ainsliaea fragrans champ caffeoylquinic acid extracts have the effects of resisting inflammations, bacteria, medicament-resistant strains, well improves pathologically changed tissues of rat suffering from cervicitis, obviously reduces the uterus index and the number of leukocytes and can be independently prepared into the medicaments for treating cervicitis or combined with other medicaments to prepare the medicaments for treating cervicitis.

The invention relates to an artificial urinary bladder intelligent control device. The artificial urinary bladder intelligent control device consists of an urine inlet monitoring area, an intelligent control system, a main body mechanism, a power source system and an external structure, wherein the urine inlet monitoring area and the intelligent control system comprise a small urine storage bag, a sensor, a circuit board, an in-vitro remote controller, a switch and a software control program; the main body mechanism comprises a main urine storage bag, a lifting platform and a motor; the power source system comprises a charging battery and a wireless charging system; the external structure comprises a main body outer casing, a ureter connecting pipe and a urethral canal connecting pipe. The artificial urinary bladder intelligent control device has the advantages that by adopting the mechanical and intelligent control combining method, the urine storage function and required urinating remote control function of natural urinary bladders of a human body are automatically simulated; by adopting a wireless charging technique, the infection caused by skin wounds due to installation of an external power source is avoided; the main body outer casing is made of a polymer material with good biological compatibility, and can be implanted into the human body to replace the natural urinary bladders; the artificial urinary bladder intelligent control device is suitable for patients with all urinary bladder cutting, and the great convenience is realized for the nursing and living of the patient after operation.

The invention relates to a production process of mechanism fermentation green and crisp plum wine, and belongs to a production method of fruit wine. The production process comprises the steps of color protection, anti-oxidization, acid regulation, sugar degree regulation, yeast preparation, pre-fermentation, post fermentation, aging and the like. The method has the beneficial effects that D-gluconic acid-delta-lactone is used; the fruit juice and the fruit slag are subjected to color protection; in addition, the D-gluconic acid-delta-lactone can be converted into non-toxic ingredients such as gluconic acid in two hours after the dissolution in the fruit juice; by the process, mildew and bacteria can be inhibited; the problem of sundry bacteria contamination in the juice extraction, acid regulation and sugar regulation processes is solved. In the technical process, the nontoxic Nisin, alcohol, chitosan and potassium sorbate are used for replacing the toxic S02; the S02 nontoxic effect of the product is controlled; the normal fermentation of the fruit wine and the sundry bacteria contamination avoidance of a product are ensured. Pectinase is replaced by the clarification effect of chitosan; the addition of pectinase for separating pectin in the fruit juice into methanol is avoided, so that the content of toxic ingredients of methanol in the product is reduced; the mouthfeel and the flavor of the product are good; the drinking is healthy.

The invention belongs to the field of medical artificial organs, and specifically relates to an animal-derived biological artificial bladder. The animal-derived biological artificial bladder is a medical artificial bladder that can be implanted in situ and consists of an artificial ureter, an artificial bladder body and an artificial urethra. The animal-derived biological artificial bladder is prepared by removing antigen-carrying cell components from original tissues after chemical modification of the animal bladder and retaining a framework for tissue regeneration. The animal-derived biological artificial bladder has better biocompatibility, and also has the same or similar structure as the extracellular matrix to perform cell adhesion, proliferation and differentiation. Thereby, the common problems such as infection, body rejection reaction, urinary calculus, renal function deterioration and the like that are brought to patients after total cystectomy are solved. In addition, the artificial bladder can sense the filling degree of the bladder, thus autonomously contracting and urinating without the aid of other external power devices.

The invention discloses a ureteral stent tube and a ureteral stent device applying the same. The ureteral stent tube comprises a stent tube body and a pull wire, wherein the pull wire comprises an elastic section and a magnetic suction section. One end of the elastic section is fixedly connected with the tail of the stent tube body, the other end of the elastic section is fixedly connected with the magnetic suction section, the elastic section is an elastic silk thread, and the magnetic suction section is a silk thread with an intermittent iron wire. When the elastic section is freely unfolded, the length of the pull wire is smaller than that from the tail of the stent tube body to a urethral orifice of a patient after the ureteral stent tube is implanted into the body of the patient. When the ureteral stent tube is taken out, the magnetic suction section is outwardly attracted by a magnet, the elastic section is elongated, the pull wire is exposed out of the body, and the ureteral stent tube is taken out by pulling the pull wire. Compared with the prior art, the ureteral stent tube solves the problem that the patient is possibly infected after the exposed pull wire is contaminated, and also solves the problem that the patient feels uncomfortable as the pull wire is exposed.

The invention belongs to the technical field of high molecular material and metal surface treatment, and in particular, discloses a preparation method of an antibacterial adhesive coating layer on a surface of stainless steel medical equipment. The method comprises the following steps: (1) the surface cleaning is performed; (2) the surface amination is performed; (3) the stainless steel medical equipment after the surface amination is dip in nitromethane solution of a compound with a structural formula for reaction to form active reaction points on the surface; and (4) the stainless steel medical equipment treated in the step (3) is dip in water solution of methacrylic acid polyethylene glycol monoester; cuprous halide is added as catalyst to react by 24 hours at a room temperature; a polymethylacrylic acid macrogol ester antibacterial adhesive coating layer is formed on the surface of the stainless steel medical equipment; and the coating layer can stop bacteria from bonding the surface of the stainless steel medical equipment, so that the surface has functions of continuous bacteria resistance and biological corrosion prevention to prevent secondary pollution.

The invention discloses a method for preparing a hydrophilic coating on the surface of a medical device, comprising the following steps: dissolving a hydrophilic high polymer in an organic solvent to obtain a hydrophilic high polymer solution; The formed inorganic composition is added into the hydrophilic polymer solution and mixed fully to obtain an inorganic composition solution; the anticoagulant drug is dissolved in an organic solvent to obtain an anticoagulant solution; the anticoagulant solution is added to the inorganic composition The solution and water are stirred evenly to obtain the hydrophilic coating composition on the surface of the medical device; the hydrophilic coating composition on the surface of the medical device is evenly sprayed on the surface of the stainless steel medical device. Bacteria cannot adhere to the surface of the medical device treated by the method of the present invention, so no further sterilization treatment is required.

A plasma active water atomizer disclosed in the invention is characterized in that an activation cavity contains an aqueous solution to be activated, gas is conveyed into a plasma generator through anactivation gas pump to generate plasma active particles, and the plasma active particles are introduced into the activation cavity under the action of the activation gas pump to generate plasma active water together with the aqueous solution; a mixing pump is communicated with a liquid medicine pool for accommodating a liquid medicine and is communicated with the activation cavity through a wateroutlet, and the plasma active water and the liquid medicine form a mixed solution according to a preset ratio by the mixing pump so as to be pumped into an atomizing cup; and a control unit controlsthe activation gas pump to generate plasma activated water with a preset volume, controls the mixing pump to generate a mixed solution with a preset concentration and controls the atomization gas pumpto pump out mixed solution mist particles at a preset speed.

Disclosed are an assembled folding feces and urine separation toilet bowl and a use method thereof. The assembled folding feces and urine separation toilet bowl comprises a toilet bowl surface, a feces pool supporting bag, a toilet bowl opening, a rotating shaft, a feces supporting frame, a urine supporting frame, a cushion, four supporting legs, four mounting holes and a urinal supporting bag, the toilet bowl surface is of an axially symmetric structure, and the four mounting holes are used for fixing the supporting legs. A urine bag sleeves a urinal supporting frame, urination can be finished, and the urine bag and a feces bag sleeve a urinal and a feces pool supporting frame respectively, so that defecation can be finished. The urine bag is packed after urination, the packed feces bag, toilet paper and disinfectant tissues are placed into an outer feces bag containing adsorbing agents after defecation, the outer feces bag is sealed, and bagged feces and urine can be stored for a long time and can be used for producing fertilizers, biological products, feed, methane and the like. Water and a special space are omitted, and the toilet bowl is small in size, light in weight, convenient to convey and distribute and simple to use and can be directly used for a family without a toilet, an earthquake stricken area, a flood stricken area and emergency water failure.

A system, accompanying apparatuses and methods relating to an oral, nasal or propellant enhanced mist delivery, drug delivery and lung cleansing apparatuses and having for an object to provide a safe and harmless means for and method of delivering medication with heated, moist, flavored air; or by inhaling warm medication like methanol into the lungs in case of a respiratory ailment under direction of a physician. Additionally, all state of the art medicines are envisioned for delivery with the system.

The invention discloses lateral episiotomy assisting equipment for parturition, and relates to the technical field of medical equipment. The lateral episiotomy assisting equipment for parturition comprises a lateral episiotomy operation assisting device, the lateral episiotomy operation assisting device comprises an operation table, supporting rods are fixedly connected to the front end and the rear end of the upper surface of the operation table, the upper surfaces of the supporting rods are fixedly connected with round rods, a neck pillow is fixedly connected to the right end of the upper surface of the lateral episiotomy operation assisting device, a neck storage groove is formed in the middle of the neck pillow, the lateral episiotomy operation assisting device is provided with a moving assembly, an instrument storage assembly, a dirt collection assembly and a function switching assembly, telescopic upper rods are fixedly connected to four corners of the lower surface of the operation table, and the interiors of the telescopic upper rods are hollow, so the problem that wounds possibly make contact with dirt and are infected when a puerpera suffers intolerable pain and moves because amniotic fluid and blood flow out to pollute a working table top during parturition lateral episiotomy when no special auxiliary equipment for parturition lateral episiotomy exists is solved.

The invention provides a magnesium-silver-copper coating for a medical implant material and a preparation method of the magnesium-silver-copper coating in order to solve the problems of synosteosis and infection of an the implant material. The multi-arc ion plating technology is adopted, the metal magnesium-silver-copper coating is prepared on an entity or a porous structure base body made from titanium, titanium alloy, stainless steel and a high polymer material, and the thickness of the coating ranges from 0.1 micrometer to 200 micrometers; and the mass percent of silver in the coating is larger than 0% and smaller than or equal to 10%, and the mass percent of copper is larger than 0% and smaller than or equal to 2%. The permanent implant material with the coating is suitable for the mechanical performance requirements of multiple implanting positions, and has excellent biocompatibility and a sterilizing function.

The invention provides a minimal invasive fracture restoration and fixing system with easy and convenient operation, which has the advantages that the fracture operation efficiency is improved, the wounds of local soft tissues and periosts are reduced, and the fracture is theoretically promoted to be better and more quickly cured. A minimal invasive fracture restoration and fixing bracket system comprises two connecting rods, a universal connecting sleeve piece and a plurality of inner fixing bodies, wherein the universal connecting sleeve piece is arranged between the connecting rods, the inner fixing bodies are vertically implanted into bones, each implanting end is of a thread structure, the other end of each inner fixing body is connected with one ends of the connecting rods, the other ends of the connecting rods are connected with the universal connecting sleeve piece, the universal connecting sleeve piece comprises two connecting sleeves and a middle connecting body, one ends of the connecting sleeves are connected with the connecting rods, the other ends of the connecting sleeves are connected with the middle connecting body, the interior of the middle connecting body is provided with a sliding body, the middle connecting body is also provided with an adjusting and locking unit, and the sliding body is slidingly butted with the connecting rods through the adjusting and locking unit.

The invention relates to a suit for children to go to toilet during outing and a using method of the suit. The suit comprises a fluid guide device, a box-type squatting pan, a urine bag and excrement outer bags, wherein the fluid guide device and the box-type squatting pan can be repeatedly used; the urine bag is disposable and is filled with water absorbents; the excrement outer bags are provided with self sealing openings; each excrement outer bag comprises an excrement bag containing water absorbents, adsorbents, toilet paper and a disinfection paper towel; the fluid guide device, the urine bag and the excrement outer bags are all placed into a box body; the box body is covered with a box cover. Before urinating is carried out, the fluid guide device is sleeved with the urine bag, and an opening of the urine bag is tied after urinating is carried out; before defecating is carried out, the box-type squatting pan formed by splicing the box body and the box cover is sleeved with one excrement bag, an opening of the excrement bag is tied after defecating is carried out, the excrement bag is placed into the excrement outer bag containing the adsorbents, and an opening of the excrement outer bag is sealed. The bagged excrement and urine can be thrown into a nearby trash can or be taken back home to be processed. The suit does not occupy special space, is small in size, light in weight, convenient to carry and simple in using method, solves the problem of foul smells and the problems of cross infections, water pollution and environmental pollution, and is particularly suitable for the children during outgoing.

The invention belongs to the technical field of medical instruments, and particularly discloses an instrument placement rack for a surgical instrument table. The instrument placement rack for the surgical instrument table includes support legs, wherein a mounting block is fixedly connected to the upper surfaces of the support legs, first mounting mouths are formed in the upper surface of the mounting block, and a first connecting block is fixedly connected to the inner wall of each first mounting mouth; a first limiting mouth is formed in the surface of one side of each first connecting block,a connecting base is movably connected with the inner wall of each first mounting mouth in an insertion mode, and a second mounting mouth is formed in the outer surface of each connecting base; placement blocks are fixedly connected to the upper surface of each connecting base, hint blocks are fixedly connected to the outer surface of each placement block, and the outer surface of each placementblock is of a cylindrical shape; and insertion grooves are formed in the outer surface of each placement block, and a sterilization cavity is formed in the upper surface of each placement block. Through the instrument placement rack of the surgical instrument table, the effect of automatic emergence of placement boxes can be achieved under the action of drive when the staff wants to pull out the placement boxes, so that the problems are solved that the placement boxes cannot be pulled out quickly when the staff are in a hurry, and time is wasted.

The invention provides a variable region sequence of a mouse monoclonal antibody specifically combined with porcine rotavirus, an antibody or an antibody fragment prepared from the variable region sequence, an application of the antibody, and a kit and a pharmaceutical composition prepared from the antibody. The antibody disclosed by the invention can be used for indirect immunofluorescence, immunohistochemistry and the like; the kit disclosed by the invention can be used for effectively detecting the porcine rotavirus, and is high in sensitivity and rapid in detection; and the pharmaceutical composition disclosed by the invention can be used for effectively preventing and treating porcine rotavirus infection.

The invention relates door equipment, in particular to a pet door with a photosensitive discoloration function. The pet door with the photosensitive discoloration function comprises a door body. The door body adopts photosensitive discoloration glass. The photosensitive discoloration glass presents opaque black when illumination reaches 600 LX or above, the transition state from the colorless transparent state to the opaque black state is presented when the illumination is 200-600 LX, and the colorless transparent state is presented when the illumination is smaller than 200 LX. A pet hole is formed in the bottom end of the door body. A small door blocking out the pet hole is arranged on the pet hole. One end of the small door is hinged to one end corresponding to the pet hole. A torsional spring is arranged in the position, hinged to the pet hole, of the small door. According to the pet door with the photosensitive discoloration function, the arrangement of the photosensitive discoloration glass is adopted, so that the problem that items inside a room are damaged due to the fact that a general glass door cannot ward off sunlight radiation in the midday or under the condition of strong sunlight illumination is solved.

The invention provides a bactericide composition comprising a phage, which comprises the phage and a carrier of Acinetobacter baumannii. The invention also provides a method for decontamination of medical institutions or medical-related research institutions, which is characterized in that Acinetobacter baumannii with an effective amount is applied to the medical institutions or medical-related research institutions to reduce the amount of Acinetobacter baumannii existed in the medical institutions or medical-related research institutions.

The invention discloses a digital powder food micromolecule toxic substance detector. The detector comprises a detector body, wherein a guiding slot and a groove are formed in the right side of the detector body; the groove is located above the guiding slot; a spring and a tension spring are fixedly connected to the left sides of the inner walls of the groove and the guiding slot; a sampling sleeve and a sampler are fixedly connected to the right ends of the spring and the tension spring respectively; the sampling sleeve movably sleeves the surface of the sampler and is located on the right side of the detector body; the surface of the sampler is movably connected with the inner wall of the guiding slot; a sampling slot is formed in the upper surface of the sampler, and is located in the sampling sleeve; a guiding rod is fixedly connected to the right side of the detector body. According to the digital powder food micromolecule toxic substance detector provided by the invention, through arranging the sampling sleeve and the sampler, the problems that the sampler and the detector are separately operated, and the sampled sampler is manually inserted into the detector for detection, resulting in food infection since the operation process is exposed in the external environment too long are solved.

The invention provides a preparation method of a melt electrospun composite fiber scaffold for bone repair and anti-infection. The preparation method comprises the following steps that (a) polycaprolactone, polyethylene glycol and macrolide antibiotics are mixed uniformly in an organic solvent, the organic solvent is evaporated and then is subjected to vacuum drying, and a solid mixed material isobtained; the mass ratio of the polycaprolactone to the polyethylene glycol to the macrolide antibiotics is 90 to (0.1-20) to (0.1-20); and (b) the solid mixed material obtained in the step (a) is subjected to melt electrospinning, and the melt electrospun composite fiber scaffold for the bone repair and anti-infection is obtained. Compared with the prior art, the preparation method can obtain a novel bone repair and anti-infective melt electrospun composite fiber scaffold which has an ordered structure and excellent biocompatibility, can be completely degraded, can be antibacterial, can promote bone cell proliferation, and meet the physical performance requirements, and the problems that a bone repair implant requires to be removed surgically twice and the bone implant is infected are solved.

The invention discloses a preparation method of a stainless steel medical appliance surface hydrophilic antibacterial coating. The method comprises the following steps of cleaning the surface of a stainless steel medical appliance; soaking the stainless steel medical appliance for 30 minutes by a sodium hydroxide solution being 5 weight percent; then, performing cleaning by deionized water; then, performing drying; performing surface amination on the stainless steel medical appliance; soaking the stainless steel medical appliance subjected to surface cleaning by a methylbenzene solution of the amino silane for 15 to 60 minutes so as to realize surface amination of the stainless steel medical appliance; after soaking, taking out and draining the stainless steel medical appliance; preparing the hydrophilic antibacterial coating on the surface of the medical appliance; uniformly spraying and coating the surface of the stainless steel medical appliance with the medical appliance surface hydrophilic coating composition. Bacteria cannot be attached onto the surface of the medical appliance treated by the method provided by the invention, so that the sterilization and disinfection treatment is not needed.

The invention discloses an identification RT-PCR method matched with attenuated live vaccines for NADC30-like PRRSV and application thereof, belonging to the technical field of agricultural and veterinary biotechnology. According to the invention, through contrastive analysis of the genomes of the attenuated live vaccines for NADC30-like PRRSV, the matching identification RT-PCR method is established, three specific primers are adopted for identification, vaccine strain infection and wild virus infection can be rapidly identified according to the size of an amplified target fragment, differentsubtypes of wild viruses can be distinguished and diagnosed, and rapid diagnosis and purification of the porcine reproductive and respiratory syndrome are achieved.

The invention belongs to the field of biomedical materials and particularly provides degradable anti-infection lithiasis-preventing Fe-Cu series alloy applicable to a urinary implant material. The alloy comprises the following components in percentage by weight: 0.2% to 5.0% of Cu, 0 to 35% of Mn, 0 to 1.5% of C, 0 to 0.6% of N and the balance Fe. Aiming at the problems that urinary tract implantsare undegradable, susceptible to infection, prone to forming stone and the like, the degradable anti-infection lithiasis-preventing Fe-Cu series alloy achieves a sterilization effect by releasing Cuions and simultaneously inhibits formation of bacterial biofilms at the surface by surface degradation and sterilization effect, thereby preventing formation and growth of stone taking bacterial filmsas the center; meanwhile elements including Mn, C and N can be selectively added; and the austenization and degradation speed of the alloy are regulated so that the alloy can be degraded and metabolized in a biotic environment in a body after a surgery without being taken out for the second time. Therefore, the problems about infection and stone formation of the urinary tract implants are effectively solved, and clinical actual problems can be solved, so the degradable anti-infection lithiasis-preventing Fe-Cu series alloy meets the current advanced medical treatment conception and the requirements of human bodies and is a new direction of development of urinary implant material.

A preparation method of the bacterial drug-resistant inhibitor is provided, which is that the Beta-naphthamine is utilized as raw material and reacts with the urea to gain the N-(2-naphthol)- thiourea, and then reacts with the o-amino pheylmethyl ether to gain INF271, namely, 1-(2- methoxyphenyl)-3-naphthyl-2-thiourea. (1) The Beta-naphthamine and urea are added in water and are added with the diluted acid for 1h to 5h heating and reflux and are filtered after cooling to gain 1-(naphthol-2base)-thiourea; (2) 1-(naphthol-2base)-thiourea and the o-amino pheylmethyl ether mix with the diluted acid and are heated to 100 DEG C. to 108 DEG C., and then react for 1h to 5h to gain the 1-(2- methoxyphenyl)-3-naphthyl-2-thiourea after cooling and filtering. The diluted acid applied in the reaction can be sulphuric acid, hydrochloric acid and acetic acid, etc. the priority is hydrochloric acid.

The invention relates to a modified silicone rubber, a preparation method and applications thereof, and an antibacterial silicone rubber product, and belongs to the technical field of medical material. The raw materials of the modified silicone rubber comprise polydimethylsiloxane, vinyl terminated polysiloxane, octamethyltetrasiloxane, a catalyst, glycidyl ether epoxy resin, a surface modifier, carboxymethyl chitosan, and an aloe extracted product. The modified silicone rubber possesses excellent bacteria inhibition effect, is capable of solving a problem in the prior art that injection is caused because of bacteria propagation caused by the poor bacteria inhibition effect of conventional silicone rubber. The preparation method is simple and rapid, and is suitable for industrialized production. The above modified silicone rubber can be used for preparing the silicone rubber product with bacteria inhibition effect, and the silicone rubber product is provided with excellent bacteria inhibition effect.

A Chinese medicine in the form of medical tea for treating cold, influenza and respiratory tract infection of SARS virus is prepared from 8 Chinese-medicinal materials including astragalus root, parched almond, honeysuckle flower, mint, etc through drying, breaking, sterilizing and loading in bags.

The invention discloses a safety puncture needle seat for a remaining needle. The safety puncture needle seat comprises a puncture needle seat body, wherein the puncture needle seat body is in fastened connection to a puncture needle; the end, connected to the puncture needle, of the puncture needle seat body is provided with a protective shield; and the protective shield comprises telescopic arms at two sides and protective glues which are fixedly connected to the telescopic arms. The safety puncture needle seat provided by the invention can solve the problem that medical personnel can be infected by germs in patient's blood in the case that the medical personnel is hurt by a puncture steel needle covered with the patient's blood due to a vigorous contraction action in a process of using an existing puncture needle; moreover, the safety puncture needle seat provided by the invention is simple in structure and practical and is applicable to straight and Y-shaped remaining needles; and the safety puncture needle seat is great in market popularization value.

The invention discloses perfumed soap with moisturizing and sterilizing functions, and a preparation method thereof. The perfumed soap with the moisturizing and sterilizing functions is prepared from, by mass, 25-55% of grease components, 5-15% of absolute ethyl alcohol, 20-40% of a sodium hydroxide solution, 5-15% of glycerinum, 1-3% of natural petals, 1-5% of plant essential oil, 1-5% of mineral powder and 0.5-2% of copper oxide, wherein the grease components comprise a component A and a component B, the mass ratio of the component A to the component B is 3:7, the component A comprises sweet almond oil, canola oil and coconut oil, and the component B comprises one or a combination of palm oil, soybean oil, olive oil, peanut oil, corn oil and castor oil. According to the invention, through application of mineral powder, copper oxide and plant essential oil, the perfumed soap is makeup removing soap, has a good moisturizing effect, can effectively improve the use experience of the makeup removing soap, can prevent skin from being dry and tight after cleaning, and has good use effect.

The invention provides a needle tube structure and an injector with the same, and the needle tube structure comprises a shell which is provided with an injection cavity; a push rod provided with an avoiding channel, wherein the push rod is movably arranged in an injection cavity; and a sealing piece mounted in the avoiding channel; wherein the shell is provided with a connecting part used for being detachably connected with a needle head structure of the injector, the sealing piece is provided with a connector located on the outer side of the avoiding channel, and the connector is used for being connected with a liquid passing core of the needle head structure so as to drive the liquid passing core to retract into the receding channel. The needle tube structure solves the problem that a needle head of the injector easily punctures medical staff in the collecting and processing process, and then spreading of hepatitis B, hepatitis C, AIDS and other diseases is caused, and infection of the medical staff is caused.