43 results about "Infections problems" patented technology

The invention relates to a hernia patch solid-supported with antibiotics and a preparation method. The antibiotic hernia patch solid-supported with drug-loaded microspheres comprises drug-loaded microspheres, a patch, and a supporting agent. The sandwich-type antibiotic hernia patch comprises a patch layer, a drug layer, and a film layer. The antibiotic hernia patch solid-supported with drug-loaded microspheres is prepared by solid-supporting the drug-loaded microspheres onto the surface of the patch material by the supporting agent. The drug-loaded microspheres are loaded with water-soluble drugs by a solvent evaporation method. The sandwich-type antibiotic hernia patch is prepared by sandwiching the drug layer between the patch layer and the film layer through a layer-by-layer superposition principle. The antibiotic hernia patch of the invention has a simple and practical preparation method, is suitable for different clinical medication requirements, has obvious slow release performance, has significant antibiotic effect in rats, solves the problem of acute and delayed infection after herniorrhaphy, has good market prospects, and is worthy of popularization and utilization.

A liquid trap cup is provided. The liquid trap cup comprises a hollow cup tube with a upper portion and a lower portion, a piston element with a top portion and a tail portion and a liquid discharge structure, in which the piston element is arranged airtight in the lower portion and is movable between a start point and an end point of the lower portion so as to control the opening and the closing of the liquid discharge structure.A liquid trap assembly using the liquid trap cup is provided. The liquid trap assembly comprises said liquid trap cup and a multi-necked adapter tube with an expanded-plate structure, in which expanded-plate structure can be tightly sealed with the liquid trap. When applying the liquid trap assembly to a breathing system, it can simply drain the liquid collected in the liquid trap cup without disassembling the liquid trap assembly so as to prevent the infection problems of patients and reduce the burden of the medical staff.

In order to solve the osseointegration and infection problems of implant materials, the invention provides a magnesium-copper coating for bone implantation and a preparation method thereof. Chemical vapor deposition technology and vapor plating technology are employed to prepare a metal magnesium-copper coating on titanium and titanium alloy, cobalt based alloy, stainless steel, polymer material or reticulated vitreous carbon, the thickness of the coating is 0.1-200 micrometers, and the mass ratio of copper element in the coating is greater than 0% and smaller than or equal to 10%. The coating and the method provided by the invention can solve the problems of bone compatibility and infection in existing implant materials, and a permanent implant material prepared by the method is suitable for the mechanical property requirements of various implantation positions, has excellent biocompatibility, and also has sterilization function.

The invention relates to a dental implant which comprises a neck implant section, a body implant section and a tail portion implant section which are sequentially connected. The end face of the neck implant section is provided with a center hole downwards penetrating through the body implant section. The body implant section is provided with a core made of compact metal and a peripheral part wrapping the outer side of the core and made of porous metal, and the center hole is located in the core. The core and the peripheral part are integrally formed through material increase manufacturing. The dental implant is prepared through a material increase manufacturing method, so that compact metal and porous metal are in seamless connection, machining efficiency is high, personalized customization is convenient, the micro-osmosis and infection problems can be effectively avoided, mechanical properties are good while biocompatibility is improved, micro-power resistance of the dental implant is improved easily, a tooth is prepared and loading is achieved immediately after the dental implant is implanted, further consultation time of a patient is shortened, the number of times of further consultation of the patient is reduced, the bone integration degree can be effectively improved, and stability is good.

A cuff member that enhances the invasion and engraftment of cells from subcutaneous tissue of a living body and robustly adheres to the subcutaneous tissue through the vascularization of capillary vessels, and can consequently isolate a wound from the outside, block exacerbating factors such as bacterial infection during healing, inhibit the downgrowth, and reduce infection problems including tunnel infection. A cuff member 2 includes a flange 3 and a tubular portion 4. The cuff member 2 includes a three-dimensional network open-cell porous structure, which is formed of a thermoplastic resin or a thermosetting resin and has an average pore size of 100 to 1000 μm and an apparent density of 0.01 to 0.5 g / cm3. A pad 5 overlies the flange 3. A tube 6 passes through the pad 5 and the flange 3.

The invention provides a calcium-phosphorus compound-magnesium composite coating for bone implanting and a preparation method thereof, aiming at solving bone combination and infection of implanted materials. A biomimetic deposition method and an evaporation technology are adopted, and a hydroxyapatite-metal magnesium coating is prepared on titanium and a titanium alloy, a cobalt-based alloy and astainless steel solid body; the thickness of the coating is 6 to 220 microns. By adopting the calcium-phosphorus compound-magnesium composite coating provided by the invention, the compatibility of implanting materials of bones and oral implants can be promoted and the infection problem is easy to solve; the implanting materials prepared by the method have excellent good biocompatibility and meetstandard requirements of mechanical properties of implanted parts; the implanting materials has an effective sterilization function.

The invention provides a vertical type LED (Light Emitting Diode) photo-therapeutic skin nursing instrument which comprises an LED face pack light module group, a light equalization film, a timer module, a switch controller, a power supply module, a rotary base and a face pack die box; the positive surface of the face pack die box is a light emergence surface, the back part of the face pack die box is a mirror surface for viewing the finish of skin phototherapy. The LED face pack light module group is a light-emitting component combined by hard circuit boards and is better in stability, and design of the vertical type rotary base supplies convenience for conversion between a face pack and a makeup mirror surface; as the vertical type LED photo-therapeutic skin nursing instrument is not directly pasted on and contact with a face, dangers that light is too hot to burn the skin and the like are prevented; phototherapy can be supplied to the skin of a whole body, and thus the cost performance of a product is increased; and in addition, for saving the space, with addition of the mirror surface design and the rotary base design, the face pack die box has the versatility. The vertical type LED photo-therapeutic skin nursing instrument solves the skin problems and the infection problem caused by a disposable patch type face pack and overcomes the limitation of a patch type photo-therapeutic face pack.

The invention relates to a vaccine composition preventing porcine reproductive and respiratory syndrome. Specifically, the vaccine composition includes an immune dosage of classic porcine reproductiveand respiratory syndrome virus antigen and / or highly pathogenic porcine reproductive and respiratory syndrome virus antigen and / or a porcine reproductive and respiratory syndrome virus NADC30 strainantigen, and a pharmaceutically acceptable carrier. The vaccine composition provided by the invention can effectively resist the attack of new epidemic strains, highly pathogenic porcine reproductiveand respiratory syndrome viruses and classic porcine reproductive and respiratory syndrome viruses, solves the infection problem of porcine reproductive and respiratory syndrome viruses of different sources of the, and is of important significance for purification of porcine reproductive and respiratory syndrome viruses.

The invention discloses application of ursolic acid in inhibiting growth of multi-drug-resistance enterobacter cloacae. According to a good in-vitro killing function of ursolic acid upon anthropogenic multi-drug-resistance enterobacter cloacae which resists to cefazolin, cefotaxime, aupmentn, meropenem, ofloxacin, levofloxacin, ciprofloxacin, cefoxitin, minocycline, imipenem, piperacillin, azithromycin and macrodantin, growth of multi-drug-resistance enterobacter cloacae can be inhibited, the lowest sterilization concentration is 0.6mg / mL, and the lowest antibacterial concentration is 0.3mg / mL. The invention discloses an inhibition function of the ursolic acid upon the multi-drug-resistance enterobacter cloacae, and the ursolic acid is capable of effectively alleviating or solving the drug-resistance infection problem of the multi-drug-resistance enterobacter cloacae and reducing the case fatality rate, provides new ideas for inhibiting anthropogenic multi-drug-resistance enterobacter cloacae, and has great practical significances.

The invention discloses a paper diaper convenient in isolating excrement. The paper diaper comprises a cylindrical waistline portion and a crotch portion; the cylindrical waistline portion is formed by connecting two side portions of a front waist exterior sheet and two side portions of a back waist exterior sheet; and an interior body is arranged on the inner side of the crotch portion and comprises a first separation layer and a second storage layer; and an excrement accommodating cavity used for accommodating excreted excrements is formed between the first separation layer and the second storage layer; the position, corresponding to an anus of a human body, on the middle back inner side of the crotch portion is provided with an opening through which the excreted excrements are convenient to enter the excrement accommodating cavity; the first separation layer is convenient for urine to pass through and is used for isolating the excrements excreted into the excrement accommodating cavity; and the second storage layer is used for receiving the excreted excrements in the excrement accommodating cavity and storing and absorbing the excrements. For the paper diaper, through the firstseparation layer and the excrement accommodating cavity, the excrements and the urine are effectively separated, cleaning and maintenance are facilitated, the skin or infection problems caused by long-time contact of the excrements with the human body are avoided, and replacement is facilitated.

The invention relates to a mask and an epidemic prevention assembly using the mask. The mask comprises a mask main body used for covering the front side of the nose and the front side of the mouth ofa human body, the middle of the mask main body in the vertical direction is of a folded edge structure capable of being unfolded and folded in the vertical direction along with the vertical opening and closing of the jaw of the human body, and the folded edge structure is formed by sequentially connecting at least two V-shaped vertical edges in the vertical direction. In the present invention, themiddle of the mask main body in the vertical direction is of a folded edge structure which can be unfolded and folded in the vertical direction along with the vertical opening and closing of the jawof the human body, the folded edge structure is formed by sequentially connecting at least two V-shaped vertical edges in the vertical direction, when a user wears the mask and speaks, the jaw of theuser can be opened and closed up and down, and the V-shaped vertical edges of the folded edge structure can be unfolded and folded along with the opening of the jaw, so that the upper end of the maskis prevented from moving downwards and sliding off, and the infection problem caused by pulling the mask by hands is further avoided.

The invention relates to an anti-bacterial essence solution for treating respiratory diseases and a preparation method of the anti-bacterial essence solution, wherein the anti-bacterial essence solution comprises a traditional Chinese medicine fermentation solution and plant essential oil. The anti-bacterial essence solution provided by the invention has the beneficial effects that the anti-bacterial essence solution which is pure natural and has anti-bacterial and anti-virus functions is formed by mixing compound traditional Chinese medicines with the plant essential oil, is used for treating acute and chronic rhinitis, bronchitis, allergic rhinitis, pneumonia and other respiratory system infection problems and can simultaneously achieve the effects of clearing heat and toxin and preventing the occurrence of the respiratory diseases. The anti-bacterial essence solution provided by the invention is natural, has no chemical additives, has a pleasant odor and simultaneously has excellent anti-bacterial capability, and the killing rate against common respiratory viruses and pathogenic bacteria can achieve 99.9%.

Disclosed herein are a hospital access control system and a hospital access control method utilizing the same, which can classify users according to different access areas according to personal information, provide access authentication means for the users, and determine whether or not the access areas applied to the access authentication means are authorized access areas in order to manage entrance and exit points, floors, spaces, traffic lines and the likes for the users thoroughly and rigorously, thereby constructing a rigorous infection prevention management system in the hospital that unspecified individuals use, and minimizing damages in the hospital by actively coping with infections in case of issues of infections.

The invention provides a multilayer anti-infection high-strength artificial dura mater, which comprises three layers including a hydrophobic inner layer facing to the cerebrum, a water-soluble chitosan outer layer backing to the cerebrum and a woven type middle layer. The invention also provides a preparation method of the multilayer anti-infection high-strength artificial dura mater. The preparation method comprises the following steps of preparing the hydrophobic inner layer through electrospinning; preparing water-soluble chitosan fine strips; preparing hydrophobic fine strips; preparing the woven type middle layer; preparing the outer layer on the middle layer by an oriented electrospinning process; finally obtaining the artificial dura mater. The artificial dura mater effectively solves the problem of infection in the dura mater repair process; meanwhile, the strength of the traditional artificial dura mater is improved; free cutting can be performed according to requirements; safety and reliability are realized; the application prospects are wide.

The invention belongs to the technical field of medical instrument disinfection, and discloses a headrest type suspended anesthesia device for the anesthesia department. The device comprises a fixingmechanism and a disinfection mechanism and a moving mechanism which are installed on one side of the fixing mechanism. The moving mechanism comprises a horizontal rotation driving assembly and a longitudinal lifting driving assembly; the longitudinal lifting driving assembly is mounted on the horizontal rotating driving assembly; in the present invention, a movable clamping device is arranged; theclamping device is mainly composed of a rotating ring and a first motor. On demand, the rotating ring can be driven to rotate through the first motor, the catheter and the mask placed on the rotatingring can be separated or closed and thus the function of automatically installing, connecting or separating the mask is achieved, the infection problem caused by contact with the mask during manual installation and the waste of treatment time of a patient in the installation process are reduced, and due to the fact that the clamping device is in a suspended state, the catheter can be lifted, andthe problem that the catheter is placed disorderly is solved.

A fluorine-containing antibacterial coating on the surface of a metal material and a preparation method thereof, belonging to the technical field of surface antibacterial treatment; the coating composition includes oxygen elements, fluorine elements, R-F compounds and R-O compounds, and the coating has nanoscale holes structure and / or nanoscale convex structure; wherein, R is one of titanium, titanium alloy, stainless steel, cobalt alloy, magnesium alloy or zinc alloy; preparation method: 1) surface pretreatment; 2) vacuum preparation; 3) Argon plasma cleaning; 4) Fluorination treatment: At the same time, argon, oxygen and carbon tetrafluoride gas are introduced into the plasma reaction chamber to perform fluorination treatment to obtain plasma treated metal materials; fluorine-containing antibacterial coating of the present invention , fluoride ions will be dissolved when in contact with bacterial liquid or other body fluids, which has a bactericidal effect and achieves antibacterial effects; the method of the present invention can obtain anti-infection medical metal materials that do not produce cytotoxicity and solve clinical problems related to metal implant devices. bacterial infection problem.

The invention relates to the field of medical treatment, and particularly relates to a repairing solution for treating soft tissue trauma of animals and a preparation method thereof. The repairing solution is prepared from the following raw material components in parts by weight: 5-15 parts of camphor oil, 45-60 parts of yolk oil, 5-15 parts of tetrastigma hemsleyanum diels et gilg and 10-20 parts of eugenol. The repairing solution can be used for repelling parasites in animal hairs, is suitable for treating symptoms of lipsotrichia, pruritus, erythema, incrustation, pustule and other skin diseases of animals, has excellent antibacterial and anti-inflammatory effects, can be used for effectively solving the infection problems of virus, fungi, bacteria and the like on animal local skin, and has the effect of promoting an injured part to actively heal, thus shortening the time of wound healing in the process of treating the wound. Furthermore, the components of the repairing solution are safe and do not have toxic or side effect, so that no adverse influence is generated when the animal licks the repairing solution after the repairing solution is applied to the wound surface of an animal.

The invention aims to provide medical antibacterial austenite stainless steel. The chemical components of the medical antibacterial austenite stainless steel comprise 0.02 or the less of C, 0.2-0.8 ofSi, 0.5-1.8 of Mn, 0.02 or the less of S, 0.02 or the less of P, 17.0-18.5 of Cr, 11.5-14.0 of Ni, 2.0-3.0 of Mo, 3.0-5.0 of Cu, 0.5-3.0 of Ga and the balance Fe. By adding Ga in an austenite stainless steel matrix and through corresponding heat treatment, a Fe3Ga intermediate phase can be precipitated from the austenite matrix, and thus the quick sterilization property and the strong antibacterial property under the high bacterial concentration are achieved on the material. The medical antibacterial austenite stainless steel can be applied to implantable medical devices related to the fieldof oral cavities, and the bacterial infection problems caused by the implantable devices can be greatly lowered.

The invention discloses a controllable antibacterial tracheal stent. The stent comprises a tracheal stent base and an antibacterial coating layer covering the surface of the tracheal stent base, and the antibacterial coating layer is prepared from a biocompatible and biodegradable host material with antibacterial ingredients; the antibacterial ingredients are dispersed in the biocompatible and biodegradable host material, and attached to the surface of the tracheal stent through a physical or chemical method; by adjusting the concentration and geometrical parameters of the antibacterial ingredients in the degradable antibacterial layer, controlled release of the antibacterial ingredients is achieved, and the infection problem caused when the tracheal stent is placed into a human body is efficiently and controllably solved.

The invention discloses a non-contact rapid reception system, and mainly relates to the field of medical facilities. The system comprises a negative pressure reception vehicle, a reception channel, asterile channel, a pollution channel and a non-contact consulting room; a transparent visible sampling window is formed in the side wall of one side of the reception channel, an operation glove extending outwards is fixed to the sampling window, and the operation glove can be worn from one side of the reception channel; a visible clinical reception window is arranged on a partition wall of the sterile channel and the reception channel; one end of the pollution channel is communicated with the reception channel; a plurality of non-contact consulting rooms are linearly distributed between the sterile channel and the polluted channel, spaces between the consulting rooms and the sterile channel are independent and are provided with conveying cabinets and visible diagnosis and treatment windows, the conveying cabinets are respectively provided with cabinet doors in the sterile channel and the ward, and disinfection devices are arranged in the conveying cabinets. The invention has the beneficial effect that cross infection is avoided to the greatest extent. The infection problem of suspected infectious disease patients before definite diagnosis is solved.

The invention discloses a metal material, and a preparation method thereof and a metal material product. The metal material comprises the following components in parts by weight: 35-42 parts of nickel, 15-20 parts of cobalt, 1-3 parts of silver, 25-30 parts of titanium, 0.5-3 parts of tantalum and 0.1-0.3 part of niobium. According to the preparation method of the metal material, a colloid impregnation method and a powder metallurgy method are combined, the defects that titanium alloy is poor in oxidation resistance and thermal conductivity at the high temperature and has strict requirements for energy input in the forming process are overcome, the metal material has good fatigue resistance, corrosion resistance and comprehensive mechanical performance by adding cobalt, tantalum and niobium, and the metal material is suitable for large-scale production. Meanwhile, due to good biocompatibility, high mechanical strength and fatigue resistance and addition of a proper amount of silver element, a certain broad-spectrum sterilization or bacteriostasis effect is achieved while the basic mechanical property is guaranteed, the bacterial infection problem of the titanium alloy surgical implantable instrument is effectively solved, and the surgical implantable instrument is worthy of popularization and application. Metal material products made of the metal material can be widely applied to the medical fields of dental prostheses, joints, spines, trauma and the like.

The invention belongs to the technical field of medical devices, in particular to an immuno-injection device for oncology that is easy to adjust. One side of the welding machine has a support bar, and one end of the needle head close to the side of the pipe body is engaged with a screwing block; in the present invention, the worker inserts the fixing block into the needle head, and holds the support bar by hand, and another Hold the tube body with one hand, and push the tube body to let the needle penetrate into the patient's tumor. When pushing the tube body, the needle will slide inside the fixed block, and the fixed block can fix the needle to prevent the needle from being punctured. It solves the problem that when the staff do not hold the needle to puncture the skin before the interventional treatment, it is easy to shake and cause the puncture position to shift, and the staff directly hold the needle to puncture and the problem is easy to cross Infection problem.

The invention provides a preparation method of a hip joint bone cement interposition and a special bending machine thereof. The preparation method comprises the following steps that firstly, an interposition femoral stem with a metal scaffold is casted, and it is ensured that the tail end of the metal scaffold is buried in the interposition femoral stem; then the head end of the interposition femoral stem is put into a femoral head casting mould, finally, an interposition femoral head connected with the interposition femoral stem into a whole is casted, and the interposition femoral stem and the interposition femoral head jointly form the hip joint bone cement interposition. The preparation method abandons a manual fabricating mode, and by adopting a method for casting the interposition femoral stem and the interposition femoral head step by step, the shaping accuracy is ensured, and the matching degree is improved; it is avoided that the tail end of the metal scaffold is exposed fromthe interposition femoral stem when the interposition femoral stem is casted, so that after the hip joint bone cement interposition is casted, the metal scaffold cannot be exposed to the outside, thereby reducing or avoiding the infection problem of an operative site of a patient.

The invention discloses a key type water dental floss with visualization and ultrasonic detection functions in the technical field of water dental flosses; the key type water dental floss comprises a main shell; a control switch is fixedly mounted at the top of the right side of the main shell; a movable groove is formed in the top of the left side of the main shell; a fixed seat is fixedly connected to the upper end of the right inner wall of the movable groove; a spray head is pulled downwards, so that the spray head is tightly clamped between two arc-shaped grooves; the spray head is stored on the inner side of the movable groove; bacterial infection caused by exposure of the spray head is avoided; a liquid discharge pipe is clamped to the inner side of a movable cavity; two movable blocks are pushed to slide upwards on the inner side of the movable cavity; a water inlet is sealed under the action of a second reset spring, so that it ensures that liquid in the main shell cannot flow out; the bacterial infection problem due to the fact that an existing water dental floss spray head is exposed outside for a long time is solved; the disease risk of the oral cavity of a patient is reduced; the health of the patient is better facilitated; the main shell does not need to be opened during liquid adding; and the working efficiency is improved.

The invention discloses applications of deoxyschizandrin in inhibiting growth of multi-drug-resistance escherichia coli. Deoxyschizandrin has good in-vitro killing action on human multi-drug-resistance Escherichia coli resisting ampicillin, nalidixic acid, cefotaxime, ciprofloxacin, cefoxitin and the like, the deoxyschizandrin can inhibit the growth of multi-drug-resistance escherichia coli at theminimum bactericidal concentration of 25.57 microg / mL and minimum inhibitory concentration of 3.13 microg / mL. The invention provides the inhibition of deoxyschizandrin on human multi-drug-resistanceescherichia coli. The deoxyschizandrin can effectively relieve or solve the drug-resistance infection problem of the multi-drug-resistance escherichia coli, reduce the case fatality rate, thus havingimportant practical significance on providing a new concept for inhibiting the human multi-drug-resistance Escherichia coli.

The invention discloses a medical drainage device for pressure sore. The device comprises a control box, a setting table, a drainage box, a cleaning box, a storage box, a recycling frame, a recycling barrel, a first drainage cover and a second drainage cover, wherein the drainage box is arranged on a left side of the control box, the cleaning box is arranged on a right side of the control box, the storage box is arranged on a right side of the cleaning box, a first connector is welded to a position, close to a middle end, of an outer wall of a top of the drainage box, a second connector is arranged at a position, close to a middle end, of an outer wall of a left side of the drainage box, a top of an inner wall of the drainage box is connected with a drainage pump through bolts, antibacterial rubber edges are arranged on peripheries of outer walls of front sides of the first drainage cover and the second drainage cover, and gauze strips are arranged on peripheries of outer walls of the antibacterial rubber edges. The device reduces a problem of secondary infection caused by a device structure when the device is continuously used by multiple patients or when the device is used by multiple parts of a single patient, improves convenience of medical staff in operating and using the device, and alleviates a problem of secondary pollution after pus is drawn out and a cleaning solution is discharged.

The invention relates to the fields of immunological technology, biotechnology and biological medicine, in particular to a vaccine for preventing novel coronavirus pneumonia COVID-19 and a preparation method thereof. A composition of immunogenic conjugates includes at least two combinations of immunogenic conjugates containing the same carrier protein or at least two combinations of immunogenic conjugates containing two different carrier proteins. The composition of the immunogenic conjugates is used for preparing a vaccine for preventing COVID-19. Compared with a traditional attenuated vaccine, an inactivated vaccine and other novel vaccines, the vaccine can quickly cope with virus variation; the field requirement for vaccine production is reduced, and large-scale batch production is easy to realize; the research and development cost and the research and development period are reduced; safety, no toxicity and stability are realized; as the molecular structure is small and simple, the problems of serious complications and iatrogenic infection are rarely caused.

The invention belongs to the technical field of medical equipment, and mainly relates to a magnetic force traction device. The magnetic force traction device comprises an intramedullary rod which is arranged in the bone cavity and an intramedullary nail which fixes the bone and the intramedullary rod, first clamping rings and second clamping rings are arranged at both ends of the magnetic force traction device, the first clamping rings are hinged to one ends of the second clamping rings, fixed lug plates are arranged at the other ends of all the first clamping rings and the second clamping rings, connecting holes are formed in all the fixed lug plates, threaded through holes are radially formed in the outer side walls of all the first clamping rings and the second clamping rings, and are internally provided with adjusting screws, locating clamps are spherically hinged to the portions, in circular rings where the first clamping rings are located, of the adjusting screws, cylindrical guide rods and threaded guide rods with the equal outer diameter are connected to the first clamping rings at the two ends of the magnetic force traction device, and second electromagnets slidably sleevethe portion, on the cylindrical guide rods, between the second clamping rings. By means of the magnetic force traction device, the infection problem of puncturing holes is solved while the burden ofa patient is relieved, traction is convenient, and discomfort is not easily caused.

The invention provides a multilayer anti-infection high-strength artificial dura mater, which comprises three layers including a hydrophobic inner layer facing to the cerebrum, a water-soluble chitosan outer layer backing to the cerebrum and a woven type middle layer. The invention also provides a preparation method of the multilayer anti-infection high-strength artificial dura mater. The preparation method comprises the following steps of preparing the hydrophobic inner layer through electrospinning; preparing water-soluble chitosan fine strips; preparing hydrophobic fine strips; preparing the woven type middle layer; preparing the outer layer on the middle layer by an oriented electrospinning process; finally obtaining the artificial dura mater. The artificial dura mater effectively solves the problem of infection in the dura mater repair process; meanwhile, the strength of the traditional artificial dura mater is improved; free cutting can be performed according to requirements; safety and reliability are realized; the application prospects are wide.

The invention discloses a homogenizing device for plant litter. The homogenizing device comprises a sealed chamber, wherein a clear water tank is arranged at the bottom of the sealed chamber; a central main rod and homogenizing cups are arranged in the sealed chamber; multiple balancing poles are connected on the central main rod; a motor and a speed reducer are arranged at an end of each balancing pole; a rotary shaft, a cutting blade, a supporting pipe and a homogenizing cover are arranged below each balancing pole; the central main rod, the balancing poles and the supporting pipes adopt hollow structures, and rubber water pipes are arranged in the central main rod, the balancing rods and the supporting pipes; a washing pump is arranged in the clear water tank. The activity of microorganisms obtaining nutrition from the litter cannot be influenced, the exogenous infection problem of a sample is solved, and the device can be automatically washed after homogenizing.