31results about How to "Adequate mechanical support" patented technology

The invention provides a tissue repair support and its preparation method and use. The tissue repair support comprises a porous tridimensional network structure composed of a composite fiber layer and a hydrophilic material. The composite fiber layer comprises composite fibers composed of an adhesion factor and a hydrophobic synthesis material. The tissue repair support is used for meninge repair, spinal meninge repair, a tissue engineering support material, artificial skin, a wound accessory material, a biomembrane, a wound cladding material, a haemostasis material, a postoperative antistick material or a beauty treatment material.

The invention relates to a tricuspid valve edge-to-edge clip device capable of being implanted through a catheter. The tricuspid valve edge-to-edge clip device comprises a rotating propelling operating rod, a main body support threaded rod and a nickel-titanium alloy dish-shaped dish, wherein the rotating propelling operating rod covers outside a connecting pushing rod, the connecting pushing rod is connected with the main body support threaded rod arranged under the connecting pushing rod through a cylindrical pin arranged at the lower end of the connecting pushing rod, the external side of the main body support threaded rod is in sleeved connection with a rotating support mechanism, connecting rods extending out of two sides of the rotating support mechanism are respectively connected with needle plates on the tricuspid valve arranged at two sides, the lower ends of the needle plates on tricuspid valve is connected with the lower end of the main body support threaded rod, two sides of the lower end of the main body support threaded rod are symmetrically connected with and provided with an outwards-extended base plate under the tricuspid valve, and the middle of the base plate under the tricuspid valve is fixed with the elliptic nickel-titanium alloy dish-shaped dish in a clamping way. The tricuspid valve edge-to-edge clip device is simple in structure, good in biocompatibility and tracing performance, good in mechanical support force, good in compliance and shape memory ability, and has little wound to patients in use.

The invention relates to a method for manufacturing an artificial vessel bracket, in particular a compound artificial small vessel bracket. The compound artificial small vessel bracket is characterized in that the small vessel bracket comprises three layers; a net tube-shaped fabric formed by using sutures to weave medical grade poly-p-dioxanone which is strong and elastic is taken as an intermediate elastic layer; a blending sulfuric acid chondroitin-collagen coating is used as an inner layer; an outer layer is wrapped in a matrix fiber layer, then is reinforced with the sutures, and subjected to compound molding; and a degradable small-caliber (4-5 mm) vessel bracket which is similar to a normal vessel in physicochemical and biomechanical property, and matched with the regeneration of self vessel tissue. The planting of seed cells on the inner surface of the vessel bracket to form an in vitro vessel provides theoretical principles and experimental basis for the clinical application of small-caliber tissue engineering vessels in coronary artery surgery and other fields.

The invention provides a tissue repair support and its preparation method and use. At least one surface of the tissue repair support contains composite fibers composed of an adhesive factor and a hydrophobic synthetic material. Through the composite fiber-containing surfaces, the tissue repair support has good tissue adhesion and fitting capacity and can well adhere to a tissue anatomical structure. The tissue repair support is suitable for a stitching method or is free of a stitching process.

The invention relates to a patch for treating rotator cuff injuries, in particularly to a patch applicable to repairing huge rotator cuff tear. The patch is woven through the warping technology, is low in mass and not likely to be disengaged and has the good clipping performance; due to the special hole and boundary design, corresponding clipping and sewing fixation are easily perfrmed according to surgical needs. The rotator cuff patch is good in biomechanical intensity, can provide enough mechanical support for rotator cuff joints, avoids patch creep deformation and improves the surgical efficiency and the treatment effect.

The invention discloses a high-strength absorbable bone screw for internal fracture fixation. The bone screw is prepared from a degradable oriented polylactic acid sectional material, wherein the raw material of the oriented polylactic acid sectional material is L-polylactide having a specific rotation of negative155-negative 160 degrees; the sectional material is prepared from L-polylactide sequentially through blank preparing, oriented reinforcing and quenching, the blank preparing method is injection molding, the oriented reinforcing method is forging and pressing or extruding; and the sectional material is manufactured into the bone screw through a turning method, a carving method or a direct molding method. The bone screw has high strength, small attenuation rate of mechanical strength, ensures mechanical support in a bone healing stage and sufficient heating time for injured bones, has good biocompatibility, can be degraded and absorbed, can be used for reducing osteoporosis, and has a remarkable effect on fixing cancellous bone fracture. Under a special condition, the size of the bone screw can be adjusted according to the ankle osteotomy, ankle fracture degree and the growth plate characteristics of ulna.

The invention relates to an anti-abrasion anti-etching alloy rod production method through a powder metallurgy process. Iron base alloy powder with anti-abrasion anti-etching performance characteristics and inner carbon steel or stainless steel alloy are subjected to hot isostatic pressing encapsulation combination to be formed into anti-abrasion anti-etching alloy rods through hot isostatic pressing combination. The produced alloy rod tissue structure is compact completely, and two layers of alloy are integrated tightly, accordingly, the requirement of application work conditions for anti-abrasion anti-etching performances is met, the use amount of high-cost alloy powder is reduced, the production cost is reduced, and the product market competitiveness is improved. The method is simple to operate, easy to control and provided with wide application markets.

The invention relates to a degradable bioprosthetic valve system which is implanted in high elasticity external stent through conduit, preparation thereof and application thereof. The degradable bioprosthetic valve system comprises a round tube external stent, and a valve is cut and seamed in the external stent. The preparation comprises winding and braiding degradable polylactic acid fiber to form a round tube netted external stent, and fixing the round tube netted external stent on a mould; thermohardening; and cutting a bioprosthetic valve and seaming the bioprosthetic valve in the external stent. The application is that the external stent clings to the blood vessel wall after the bioprosthetic valve is implanted through a conduit, the external stent gradually degrades after being covered and wrapped with intima, the periphery of the valve gradually clings to the blood vessel wall, and the bioprosthetic valve firmly clings to the blood vessel wall after all the external stent degrades. The degradable bioprosthetic valve system can be implanted and is degradable, the bioprosthetic valve can be totally adhered to the blood vessel wall, so the degradable bioprosthetic valve system has good prospect on clinical application.

The invention discloses a silicon pole plate and a preparation method thereof. The silicon pole plate is made of a doped conductive crystalline silicon material and is provided with an internal cooling medium flow channel, a front reducing agent flow channel and / or a back oxidizing agent flow channel, wherein the internal cooling medium flow channel, the front reducing agent flow channel and / or the back oxidizing agent flow channel are / is respectively provided with a silicon pole plate inlet and outlet combination communicated with the internal cooling medium flow channel, the front reducing agent flow channel and / or the back oxidizing agent flow channel. Compared with a metal pole plate, a graphite pole plate or a composite material pole plate in the prior art, the silicon pole plate provided by the invention has better advantages in the aspects of service life, cost, efficiency and power density, and undoubtedly has great significance and a core promotion effect on the large-batch industrialization process of fuel cells.

The invention provides a tissue repair scaffold, as well as a preparation method and usage thereof. At least one surface of the tissue repair scaffold comprises a composite fiber which comprises an adhesion factor and a hydrophobic synthetic material. The surface comprising the composite fiber enables the tissue repair scaffold of the invention to be endowed with good tissue adhesive force and conformability and adhere well to a tissue anatomic structure. The tissue repair scaffold can be either sutured or non-sutured.

The invention provides a photo-crosslinking injectable nanofiber-hydrogel compound and a preparation method thereof. The compound is prepared from composite hydrogel and hydrophobic modified hyaluronic acid nanofibers which are uniformly dispersed in the composite hydrogel, the composite hydrogel is formed by polymerizing gelatin which is modified by carbon-carbon double bonds and can be photopolymerized, hyaluronic acid which is modified by carbon-carbon double bonds and can be photopolymerized, and dopamine which is modified by carbon-carbon double bonds and can be photopolymerized in the presence of a photoinitiator under the illumination condition. On the basis that the porosity and the specific surface area of the material are not reduced, the mechanical property and the tissue adhesion performance of the material are improved, and the skin repair performance of the material is improved. The invention also provides an application of the photo-crosslinking injectable nanofiber-hydrogel compound in the field of preparation of skin repair materials.

The invention relates to a tricuspid valve edge-to-edge clip device capable of being implanted through a catheter. The tricuspid valve edge-to-edge clip device comprises a rotating propelling operating rod, a main body support threaded rod and a nickel-titanium alloy dish-shaped dish, wherein the rotating propelling operating rod covers outside a connecting pushing rod, the connecting pushing rod is connected with the main body support threaded rod arranged under the connecting pushing rod through a cylindrical pin arranged at the lower end of the connecting pushing rod, the external side of the main body support threaded rod is in sleeved connection with a rotating support mechanism, connecting rods extending out of two sides of the rotating support mechanism are respectively connected with needle plates on the tricuspid valve arranged at two sides, the lower ends of the needle plates on tricuspid valve is connected with the lower end of the main body support threaded rod, two sides of the lower end of the main body support threaded rod are symmetrically connected with and provided with an outwards-extended base plate under the tricuspid valve, and the middle of the base plate under the tricuspid valve is fixed with the elliptic nickel-titanium alloy dish-shaped dish in a clamping way. The tricuspid valve edge-to-edge clip device is simple in structure, good in biocompatibility and tracing performance, good in mechanical support force, good in compliance and shape memory ability, and has little wound to patients in use.

Disclosed in the invention is a method for manufacturing a packaging assembly. The method comprises the following steps that: a lead frame is formed at a substrate, wherein the lead frame includes a plurality of leads and first surfaces of the leads are exposed; electronic elements at a plurality of levels are installed at the lead frame, so that the electronic elements at at least one level are electrically connected with the first surfaces of at least one group of leads among the multiple leads; and at least one part of the substrate is removed, so that second surfaces, opposite to the first surface, of the multiple leads are exposed for external connection. According to the method, overturning of a semiconductor structure during the manufacturing process is not needed. The yield of the packaging assemblies can be improved; the cost can be lowered; and the packaging quality can be enhanced.

The invention relates to a method for preparing iron-based bone implant capable of accelerating degradation. The method comprises the following steps: (1) ball milling to break a wall; (2) acidification treatment; (3) filtration and drying; (4) powder dispersion; (5) Laser sintering. The invention has the beneficial effect that the end of the carbon nanotube generates structural defects by utilizing a ball milling wall-breaking process, Carboxyl and hydroxyl functional group are formed at that structural defect through acidification treatment, The Coulomb adsorption between iron and iron ionsis used to adsorb the bivalent and trivalent iron ions produced by the degradation of iron matrix, so as to avoid the production of ferric hydroxide, ferrous hydroxide and other degradation products covering on the iron matrix, to promote the full contact between the iron matrix and human body fluid, and to accelerate the degradation process of iron-based bone implants; At that same time, the carboxyl and hydroxyl functional group in the invention can further accelerate the degradation of the iron-based bone implant by improving the hydrophilicity of the iron-based bone implant.

The invention relates to a method for manufacturing an artificial vessel bracket, in particular a compound artificial small vessel bracket. The compound artificial small vessel bracket is characterized in that the small vessel bracket comprises three layers; a net tube-shaped fabric formed by using sutures to weave medical grade poly-p-dioxanone which is strong and elastic is taken as an intermediate elastic layer; a blending sulfuric acid chondroitin-collagen coating is used as an inner layer; an outer layer is wrapped in a matrix fiber layer, then is reinforced with the sutures, and subjected to compound molding; and a degradable small-caliber (4-5 mm) vessel bracket which is similar to a normal vessel in physicochemical and biomechanical property, and matched with the regeneration of self vessel tissue. The planting of seed cells on the inner surface of the vessel bracket to form an in vitro vessel provides theoretical principles and experimental basis for the clinical application of small-caliber tissue engineering vessels in coronary artery surgery and other fields.

The invention provides an ultra-wideband electromagnetic shielding and bulletproof composite structure material and a preparation method thereof, and belongs to the field of preparation of electromagnetic wave-absorbing materials. The invention aims to solve the problems that the current electromagnetic shielding material is narrow in absorption wave band, the composite structure material is high in preparation cost and complex in process, and does not have protection performance. The ultra-wideband electromagnetic shielding and bulletproof composite structural material is mainly composed of four structural modules, namely (1) a wave-transparent skin; (2) preparing an aramid fiber honeycomb sandwich; (3) a reflecting plate; and (4) a bulletproof back plate. Wherein the wave-transparent skin is arranged on the outermost surface and receives incident electromagnetic waves, the aramid honeycomb sandwich, the reflecting plate and the bulletproof back plate are sequentially overlaid downwards, and all structural modules are bonded through modified resin adhesives. The ultra-wideband electromagnetic shielding and bulletproof composite structure material has a very excellent electromagnetic shielding effect, electromagnetic stealth of a target facility is achieved, meanwhile, certain protection performance is achieved, space occupation is reduced due to the multi-functionalization characteristic of the overall composite structure, and therefore the possibility that a target is detected is further reduced from the appearance; and the preparation raw materials of each structure module are rich, the cost is low, the operation process is simple, and industrial popularization and application of the ultra-wideband electromagnetic shielding and bulletproof composite structure material are facilitated.

The invention discloses a preparation method and applications of through-hole phase-transfer type IPMC taking PVDF / PVP / IL as a basal membrane. The IPMC is composed of a basal membrane, carbon nanotubemembrane electrodes fixed on two sides of the basal membrane, and an external electric signal input system. The through-hole phase-transfer type IPMC has high porosity. The PVDF / PVP / IL basal membraneis prepared by a phase transfer technology and a hypochloric acid PVP removing technology; the porosity of the basal membrane is large therefore, IPMC can absorb more ionic liquid, the IPMC can be stably driven for a long term; the through-hole phase-transfer type IPMC is hydrophobic, and the driving of IPMC obtained through IL (ionic liquid) driving is more stable. The through-hole phase-transfer type IPMC contains a large amount of channels, the ionic migration amount in IPMC is increased, greater pressure difference and ionic flows are formed in IPMC, greater driving is formed in an electric actuator, and at the same time, a stronger mechanical performance is provided.

The invention relates to an anti-abrasion anti-etching alloy tube production method through a powder metallurgy process. Iron base alloy powder with anti-abrasion anti-etching performance characteristics and inner carbon steel or stainless steel alloy are subjected to hot isostatic pressing encapsulation combination to be formed into anti-abrasion anti-etching alloy tubes. The produced alloy tube tissue structure is completely compact, and two layers of alloy are integrated tightly, accordingly, the requirement of application work conditions for anti-abrasion anti-etching performances is met, the use amount of high-cost alloy powder is reduced, the production cost is reduced, and the product market competitiveness is improved. The method is simple to operate, easy to control and provided with wide application markets.

The invention discloses a power semiconductor chip metal layer structure capable of realizing low-temperature bonding and high-temperature service, which is characterized in that on the basis of the traditional back gold layer Ti / Ni / Au of a chip, a metal Co layer and a metal Sn layer are respectively deposited through an electroplating method, and meanwhile, the metal Co layer is electroplated on the surface of a substrate copper layer to form a Co / Sn / Co sandwich structure. The electroplated Sn coating is compact in grain and has the advantages of being low in porosity and good in weldability, and the problems of cavities, organic matter residues and the like caused in the backflow process of a solder layer such as soldering paste or a soldering lug are solved.

The invention provides a tissue repair support and its preparation method and use. The tissue repair support comprises a porous tridimensional network structure composed of a composite fiber layer and a hydrophilic material. The composite fiber layer comprises composite fibers composed of an adhesion factor and a hydrophobic synthesis material. The tissue repair support is used for meninge repair, spinal meninge repair, a tissue engineering support material, artificial skin, a wound accessory material, a biomembrane, a wound cladding material, a haemostasis material, a postoperative antistick material or a beauty treatment material.

The invention discloses a composite graphite grounding conductor and a manufacturing method and an application method of the composite graphite grounding conductor. The composite graphite grounding conductor is characterized by comprising a corrosion-resistant sleeve, a high-carbon graphite inner core is filled into the sleeve, and a group of through holes are distributed in the sleeve. According to the composite graphite grounding conductor and the manufacturing method and the application method of the composite graphite grounding conductor, the expanded graphite core is wrapped by a high-strength hot galvanized tube or a stainless steel tube with holes, so that high electrical conductivity is ensured, and the composite graphite grounding conductor has high mechanical strength and certain toughness and is not prone to fracture. Due to the special structure, electrical conduction is mainly completed by the graphite core, so that the mechanical strength is kept even if a metal armor rusts because of oxidation, and the electrical conductivity of the whole product will not be affected. The composite graphite grounding conductor organically combines the electrical conductivity and corrosion resistance of the graphite and physical performance of metal material and thus has the advantages of being compact in texture and resistant to pressure, tension and impact due to high strength.

The present invention provides a tissue repair scaffold, its preparation method and application. At least one surface of the tissue repair scaffold contains composite fibers composed of adhesion factors and hydrophobic synthetic materials. The surface containing the composite fiber makes the tissue repair scaffold of the present invention have good tissue adhesion and conformability, and can be well adhered to tissue anatomical structures. The tissue repair bracket can be sutured or not sutured.

The invention provides a boron-doped diamond film electrode composite substrate. The boron-doped diamond film electrode composite substrate comprises a substrate lower part and a substrate upper part which is positioned on the upper surface of the substrate lower part and is used for depositing a boron-doped diamond film, the lower part of the substrate is a ceramic material, and the upper part of the substrate is a metal material; and a groove is formed in the upper surface of the lower base body part, a protruding part matched with the groove is arranged on the lower surface of the upper base body part, and the groove is used for clamping the protruding part. The protruding part on the upper portion of the base body is clamped in the groove in the lower portion of the base body, the protruding part and the groove are matched with each other, and the bonding performance of the upper portion and the lower portion of the base body made of different materials is enhanced. The upper part of the substrate is a part for depositing the boron-doped diamond film, and the lower part of the substrate is used for providing mechanical support, so that the fluid scouring bearing capability of the substrate is enhanced. The lower part of the substrate is made of a ceramic material, the corrosion resistance is strong, after the boron-doped diamond film is deposited on the upper part of the substrate, the upper part of the substrate with weak corrosion resistance is isolated from fluid by the boron-doped diamond film, the overall corrosion resistance of the composite substrate is improved, and the service life is long.

The invention relates to a method for preparing iron-based bone implant capable of accelerating degradation. The method comprises the following steps: (1) ball milling to break a wall; (2) acidification treatment; (3) filtration and drying; (4) powder dispersion; (5) Laser sintering. The invention has the beneficial effect that the end of the carbon nanotube generates structural defects by utilizing a ball milling wall-breaking process, Carboxyl and hydroxyl functional group are formed at that structural defect through acidification treatment, The Coulomb adsorption between iron and iron ionsis used to adsorb the bivalent and trivalent iron ions produced by the degradation of iron matrix, so as to avoid the production of ferric hydroxide, ferrous hydroxide and other degradation products covering on the iron matrix, to promote the full contact between the iron matrix and human body fluid, and to accelerate the degradation process of iron-based bone implants; At that same time, the carboxyl and hydroxyl functional group in the invention can further accelerate the degradation of the iron-based bone implant by improving the hydrophilicity of the iron-based bone implant.

The invention discloses a bioabsorbable compound stent. An ultra-fine grain magnesium alloy stent is used as a matrix, a completely degradable polymer material is coated on the surface of the ultra-fine grain magnesium alloy stent as an anticorrosion and mechanical-support protective layer, and a medicinal carrier coating is applied outside the protective layer. The magnesium alloy material is a three-component alloy or multi-component alloy composed of one or the combination of the following alloy systems: Mg-Fe, Mg-Mn, Mg-Zn, Mg-Ca, Mg-Y and Mg-RE. The stent can provide sufficient mechanical support for blood vessels and effectively avoid resilience. The stent can effectively reduce the overhigh corrosion rate of the magnesium alloy after being implanted into the human body, and ensure that the blood vessels can gain sufficient mechanical support in the early endothelialization period, so that the service time of the stent and the blood vessel endothelialization time are optimally matched, and the stent can be completely degraded within an appropriate time.

A degradable iron-based implant and a preparation method thereof. The implant is composed of an iron matrix and carbon nanotubes evenly distributed therein. The preparation steps are: taking carbon nanotubes and iron powder, and stirring mechanically under the protection of argon Mixing and ball milling followed by a selective laser melting process under argon protection resulted in a degradable iron-based implant. The beneficial effect of the present invention is that carbon nanotubes are used as cathodes for galvanic corrosion, and the degradation rate of the iron-based implant is greatly improved by utilizing its characteristics of high standard potential, good electrical conductivity and large specific surface area, and solves the problem of conventional Iron-based implants degrade too slowly, and the prepared iron-based implants can provide sufficient mechanical support, and the preparation method of the present invention can achieve uniform dispersion of carbon nanotubes in the iron matrix and maintain structural integrity , so as to give full play to its improvement effect on the degradation behavior of iron-based implants.

The invention provides a boron-doped diamond thin film electrode foamed ceramic matrix, which comprises a core, a middle part attached to the outer surface of the core at intervals, and a boron-doped diamond on the exposed surface of the core at the interval between the outer surface of the middle part and the middle part. The film deposition part; the core part and the boron-doped diamond film deposition part are made of ceramic material, the middle part is an energy-absorbing material whose outer surface is covered with heat insulating material, and the boron-doped diamond film deposition part is a foam-like structure composed of interpenetrating holes . The core part of the present invention provides mechanical support for the substrate, shares part of the fluid impact force acting on the electrode installation position, and reduces the possibility of the electrode leaving the installation position; The impact force generated by the interpenetrating holes of the boron-diamond film deposition part is effectively absorbed by the middle part when it hits the middle part, avoiding the problem that the impact force is too large when the impact force penetrates the entire electrode, which causes the matrix to be damaged along the hole wall and the electrode life is shortened. .