155 results about "Micro orifice" patented technology

The invention discloses an injection molding device with an auxiliary mold micro-opening and glue sealing structure, and the device realizes accurate micro-opening of a movable mold plate through the synergistic effect of a mold opening and closing assembly and an auxiliary mold opening assembly, so that the micro-opening distance of the movable mold plate can be kept in a controllable range of 0.5 mm-2mm. Therefore, the uniformity of mold cavity exhaust and material flow distribution in the injection molding foaming process is effectively improved; in addition, the structure of the injection screw is optimized, and a spiral dispersing element area and a pin mixing area are sequentially arranged at the head of the injection screw, so that the gas-containing molten material can be efficiently dispersed and homogenized, and the micropore structure and the surface quality of the interior of a product are remarkably improved. Compared with the prior art, the consistency and the size precision of the product can be remarkably improved, the defective rate is reduced, and the mechanical property and the appearance quality of the foamed plastic product are improved.

The utility model discloses a pelvic brittle fracture bionic hollow screw manufactured based on the 3D printing technology. The pelvic brittle fracture bionic hollow screw manufactured based on the 3D printing technology comprises a screw body, and the screw body comprises a screw tail, a supporting part and a screw head; a thread, a diversion trench and a microporous structure are arranged on the supporting part; the micropore structure comprises a plurality of point position sets spirally arranged on the supporting part, and the difference between every two adjacent point position sets is one fourth of the circumference. According to the pelvic brittle fracture bionic hollow screw manufactured based on the 3D printing technology, the screw body manufactured through the D printing technology is arranged, a micro-pore structure distributed in a topological configuration mode can be conveniently arranged on the screw body, bone cement can be conveniently spread around the screw body in a more dispersed mode through the micro-pore structure, and therefore the bone cement can be more evenly distributed on the periphery of the screw body. And the micropore structure is beneficial to bone tissue growth, so that the long-term stability of the screw is improved.

The invention discloses a nonlinear path planning method for a melt electrostatic direct writing stent guided by micropore characteristics, and relates to the technical field of additive manufacturing. Comprising the following steps: according to design requirements, defining binary functions L (x, y) and W (x, y), and respectively controlling spatial distribution of pore length and width of micropores; an XY plane is divided into orthogonal reference line grids through two groups of equidistant reference lines parallel to an X axis and a Y axis, namely an X (y) line and a Y (x) line, and each reference line can determine an upright plane, namely an X (y) plane and a Y (x) plane; and then determining geometric intersection points of the L / 2 (x, y) and W / 2 (x, y) function curves and an X (y) plane and a Y (x) plane determined by the reference line as path intersection points by using zigzag broken lines, after all the intersection points are obtained, sequentially connecting the intersection points to obtain a designed nonlinear path, and carrying out feasibility verification on the generated nonlinear path. The method provides a parameterized solution for micro-structure bionic design of the MEW stent, and is suitable for stent manufacturing with complex tissue regeneration requirements.

The present invention relates to a guided bone regeneration device that is intended for the reconstruction of a buccal bone defect and is composed of an optionally micro-perforated smooth wall which is made of titanium and has a shape that covers said buccal bone defect.The present invention also relates to a process for manufacturing a device of the invention, comprising a step of constructing the device of the invention according to a three-dimensional representation obtained by means of a technique of maxillary-dental imaging of the bone defect.

The flow-adjustable perfusion balloon catheter comprises a catheter body, a balloon capable of being filled and a catheter base, a push rod channel and a filling channel are arranged in the catheter body, the filling channel is communicated with an inner cavity of the balloon, and a first connector and a second connector are arranged on the catheter base. Micropores are formed in the positions, located at the near end and the far end of the balloon, of the catheter body and are the near-end micropore and the far-end micropore respectively, the near-end micropore and the far-end micropore are communicated through a blood flow channel formed in the catheter body, and a blocking piece capable of blocking the near-end micropore or the far-end micropore is arranged in the blood flow channel. A push rod is arranged in the push rod channel, and the far end of the push rod is connected with the near end of the plugging piece. Compared with the prior art, by arranging the blood flow channel, effective circulation of blood flow can still be achieved after balloon plugging in the operation, complications caused by ischemia or hypertension in the operation are avoided, the perfusion blood flow can be adjusted in time according to different patient conditions, and the success rate of the operation is increased.

This invention relates to the field of factory environmental control technology, and discloses a distributed micro-orifice jet temperature control system and its control method for factory environments. The system includes a central unit, a main air supply duct, branch hoses, workstation-level electromagnetic regulating valves, female quick-connect fittings with leak-proof check valves, and terminal equipment with male quick-connect fittings. The terminal equipment is equipped with a hollow column composed of an outer and inner tube, a telescopic locking mechanism, and low-voltage cables with a helical spring-like extension structure. It also includes an AI controller, an ambient temperature sensor, a body surface temperature sensor, a personnel presence sensor, and a pulse width modulation generator. This invention uses leak-proof check valves to block airflow in vacant workstations to avoid energy loss, utilizes the helical spring-like extension structure to prevent breakage of low-voltage cables, and uses the AI ​​controller to adjust the flow cross-sectional area of ​​the workstation-level electromagnetic regulating valves based on multi-sensor parameters to achieve safe flow interruption and protect personnel at the workstations.

The invention relates to an instrument for transferring cerebrospinal fluid in a ventricle into a body cavity of other parts of a human body, and particularly discloses a cerebrospinal fluid drainage catheter component and a drainage system.The cerebrospinal fluid drainage catheter component comprises a catheter body, a plurality of rows of main long holes which extend in the circumferential direction and are distributed at intervals in the axial direction are formed in the wall of the catheter body, and a plurality of drainage holes are formed in the main long holes; a plurality of protruding parts are arranged on the two linear hole walls of the main long hole so that the main long hole can be divided into a plurality of micro holes. The pipe wall occupied by each row of main long holes is a first section, and the pipe wall between each two adjacent rows of main long holes is a second section; the driving component is used for driving one of every two adjacent second sections to axially move relative to the other second section, so that one end, in the circumferential direction, of the main long hole axially moves relative to the other end of the main long hole, and the two linear hole walls of the main long hole generate relative dislocation movement in the circumferential direction; therefore, the protruding part disturbs the interior of the main long hole.

The utility model relates to the technical field of soaking devices, and discloses a self-cleaning microporous membrane balloon catheter soaking device which comprises a box body, a sealing ring is arranged at the bottom of the box body, a rotating shaft is installed in the sealing ring, a baffle ring is fixedly connected to the outer portion of the lower end of the rotating shaft, and the lower end of the baffle ring is provided with a sealing ring. Limiting grooves are formed in the left side and the right side of the portion, located on the upper side of the baffle ring, of the rotating shaft, a lantern ring is arranged outside the upper end of the rotating shaft, limiting strips are fixedly connected to the left side and the right side of the inner wall of the lantern ring, and the outer walls of the limiting strips are connected to the inner sides of the limiting grooves in an up-down sliding mode. According to the balloon catheter soaking device, balloon catheters can be limited and fixed through the arranged fixing clamps, the multiple balloon catheters can be separated through the arranged containing disc, the situation that the balloon catheters are wound and damaged during soaking is avoided, soaking liquid in the box body can be pumped out through the gathering opening through the arranged conveying pump, and the soaking liquid is injected into the filtering box through the conveying pipe; and the soaking liquid is filtered through the filter plate, so that impurities in the soaking liquid are removed.

The utility model provides a pre-filling micropore injector, relates to the technical field of auxiliary structures of micropore injectors, and aims to solve the problems that when an existing micropore injector is actually used, a worker operates the injector to extract liquid medicine in an ampoule bottle and then injects the liquid medicine, the risk of bacterial contamination exists in the extraction process, and the injection time is prolonged. Comprising a pipe body, the left end of the pipe body is fixedly connected with a connector pipe, the outer wall of the pipe body is fixedly connected with a liquid injection pipe, the top of the liquid injection pipe is provided with an antibacterial plug block, the antibacterial plug block and the liquid injection pipe are matched in shape, a piston head is installed in the pipe body, and the right side of the piston head is fixedly connected with a push rod. A limiting sleeve is movably connected to the outer wall of the push rod, a handheld plate is fixedly connected to the right tail end of the push rod, and a connecting pipe is fixedly connected to the left end of the connector pipe.

The present application relates to a kind of nasal ala base subperiosteal implant retention method, belong to plastic surgery medical instrument technical field.The present application provides a kind of nasal ala base subperiosteal implant soft tissue suspension retention method and its implant and system.The method includes: implant is placed into maxillary bone subperiosteal interstice, and implant fixed wing is fixed with the soft tissue anchor point such as alar base ligament of alar elevating lip muscle using drug-loaded degradable suture and is suspended and fixed.Implant surface is provided with the microporous structure of guiding tissue ingrowth, and is provided with the drug depot recess of filling load immunomodulator temperature-sensitive hydrogel.Postoperative healing process, suture is released under the action of tension to accelerate proangiogenic factor and promote local vascularization, and temperature-sensitive hydrogel slow-release immunomodulator induces macrophage to repair type polarization, and cooperatively promotes the biological chimeric fixation of implant and soft tissue.The present application can realize the double stable retention of implant, reduces postoperative displacement risk.

Interbody fusion devices and related methods of manufacture are described herein. An example interbody fusion device can include a plurality of vertebral endplates, and a body extending between the vertebral endplates. The body and the vertebral endplates can define an internal cavity. Additionally, each of the vertebral endplates can include a lattice structure and a frame surrounding the lattice structure, where the lattice structure being configured to distribute load. Each of the vertebral endplates can also include a plurality of micro-apertures having an average size between about 2 to about 10 micrometers (μm), and a plurality of macro-apertures having an average size between about 300 to about 800 micrometers (μm).

This invention relates to the field of hydrogel electrode patch technology, and more particularly to a microstructured hydrogel patch and its preparation method, comprising a base layer, a conductive layer, and a hydrogel electrode layer stacked sequentially. The skin-contact surface of the hydrogel electrode layer is arrayed with micro-protrusions, each micro-protrusion having a micro-flared adsorption portion at its end, and an inward-curving portion at the end of the adsorption portion. A mesh-like breathing channel is provided between the micro-protrusions, and a breathable channel is axially opened on each micro-protrusion. A microporous one-way breathing valve communicating with the breathing and breathable channels is provided on the base layer. During preparation, the micro-protrusions and their end structures are formed using a mold, and the breathable channels are constructed. This invention enhances the adhesion between the patch and the skin through the micro-flared adsorption portion and the inward-curving portion, and combined with the breathable structure, improves breathability and wearing comfort, avoids skin allergies, and provides stable signal acquisition, making it suitable for long-term physiological signal monitoring.

This application discloses a single droplet generation device based on piezoelectric ceramics, including a microcavity liquid chamber, a piezoelectric driving component, a micro-orifice nozzle, a hydraulic adjustment system, and an electronically controlled driving module. The microcavity liquid chamber has a nozzle interface at its bottom, and its internal cavity volume is adapted to store a small amount of liquid and transmit pressure. The piezoelectric driving component includes a piezoelectric ceramic element, which is connected to the microcavity liquid chamber by bonding and is used to generate deformation under the drive of an electrical signal to apply pulse pressure to the liquid in the liquid chamber. The micro-orifice nozzle is detachably connected to the bottom of the liquid chamber, and its nozzle diameter is adjustable to control the initial size of the droplet. The electronically controlled driving module includes a power supply, a driving circuit, and a controller, which outputs an adjustable electrical signal to coordinately control the voltage amplitude, pulse width, and trigger frequency of the piezoelectric driving component, and is linked with the hydraulic adjustment system to achieve multi-parameter control of the droplet size. This application achieves high-precision droplet control through the coordination of the piezoelectric driving component and the electronically controlled module.

The invention discloses a trachea cannula with an aerosolization drug delivery function under an air bag. The trachea cannula comprises a main tube body, the air bag, an air bag inflation tube and an independent drug delivery channel embedded in the tube wall of the main tube body. The far end of the channel extends below the attachment point of the air bag and is communicated with the air channel through a plurality of micropores, and the near end of the channel is provided with a standardized connecting port. Medicine can be accurately conveyed to a dead space area below the air bag, efficient phlegm reduction, blocking prevention and infection resistance are achieved, negative pressure suction is supported, administration-suction integrated operation is formed, and nursing safety and convenience are remarkably improved.

A strap (3), two complementary fastening elements (4, 5) configured to close the collar (1) into a self-closing loop, a sheath (2) attached to the strap (3), said sheath (2) having an inner face with a micro-perforated body and an outer face made of waterproof material, the inner face having a pouch (11) with an opening (12) configured to allow the diffusion of an antiparasitic treatment molecule through said micro-perforated body. Figure for the abstract: Fig 1

The application discloses a kind of biomimetic silk fibroin cartilage scaffolds for cranium defect repair, belong to biomedical engineering technical field.To solve the problem of single structure, low bone formation efficiency and mismatching of mechanical properties and degradation rate of existing cranium repair scaffold, the application provides a kind of scaffold, which includes in order from outside to inside: biomimetic periosteum layer, bone conduction and vascularization layer and cartilage induction layer.Biomimetic periosteum layer is dense nanofiber membrane structure, and plays the role of physical barrier and osteoinduction;Bone conduction and vascularization layer is gradient porous structure with gradually decreasing aperture from outside to inside, aiming to guide the ordered growth of blood vessels and cells, and promote rapid vascularization;Cartilage induction layer is sponge-like microporous structure, used for forming stable cartilage template and starting endochondral ossification.The application simulates the natural bone healing process through structural biomimicry and functional zoning, synergistically promotes vascularization and osteogenesis, and realizes efficient biological repair of cranium defect.

The application discloses a preparation method of a high-mechanical-matching-degree prosthesis based on topological optimization, which comprises the following steps: reconstructing a bone defect model by scanning CT data of a target region, and performing smoothing treatment on the model; constructing a prosthesis contour; determining a prosthesis porosity distribution through topological optimization, and obtaining regions with different density ranges of the prosthesis; replacing the regions with different density ranges in step 3 with random microporous structures with different pore diameters and porosities according to required biological properties and mechanical properties, so as to obtain a prosthesis model matched with a mechanical environment of a defect; and printing a prosthesis embryo, and performing a defatting and sintering process to obtain the prosthesis. The application realizes the best distribution of micropores in the prosthesis through topological optimization, and designs the random microporous structures with natural transition according to the topological optimization result, so that the stress distribution of the prosthesis is more uniform, and the mechanical and biological requirements of the prosthesis in bone repair are met.

This invention relates to a device and method for aspirating hemorrhage from the stomach. The device includes a guide tube with an axially arranged suction chamber and an auxiliary chamber. One end of the suction chamber is fitted with a plug that communicates with it. The plug has several microporous rings penetrating its inner and outer circumference. The other end of the suction chamber is connected to a negative pressure unit. The auxiliary chamber is axially arranged on the wall of the suction chamber. One end of the auxiliary chamber extends into the end of the suction chamber and is connected to an impedance sensor. The other end is connected to an auxiliary flushing unit. The negative pressure unit and the auxiliary flushing unit are also electrically connected to a control module. The control module is electrically connected to the impedance sensor and the microporous rings and is used to trigger pulsed expansion of the microporous rings based on the impedance signal from the impedance sensor. Through pulsed expansion of the microporous rings, combined with reverse flushing by the auxiliary flushing unit, the device of this invention can achieve dual unblocking through both expansion and flushing, improving operational continuity.

The invention provides a glue uniformizing orifice film uniformizing process for a porous base material. The glue uniformizing orifice film uniformizing process comprises the following steps that S1, a rigid base material with micropores formed in the surface is provided; s2, the surface of the base material is subjected to glue uniformizing and curing, and an initial glue layer is formed; s3, applying a glue supplementing solution to the edge of the orifice of the micropore in a micro-dispensing manner to form an annular glue body surrounding the orifice; and S4, carrying out secondary homogenization treatment on the base material on which the annular colloid is formed, so that the annular colloid is spread and fused with the initial glue layer, and forming a glue film with uniform thickness in the orifice area. According to the method, after overall glue uniformizing is carried out, local accurate glue supplementing is carried out on the hole opening area, secondary uniformizing treatment is carried out, the siphon effect generated by negative pressure in a hole in the spin coating process is effectively counteracted, the thickness uniformity of a hole opening glue film is remarkably improved, and the problems that hole opening glue is thin and the bottom is leaked are fundamentally solved.

The utility model discloses an air floatation embracing clamp structure, drilling mechanism and drilling equipment, including embracing clamp body and shell, the embracing clamp body is equipped with the air floatation axle hole that runs through along the axial direction, the shell is sleeved on the periphery of embracing clamp body, the shell and the outer wall surface of embracing clamp body form the annular air chamber, the annular air chamber is equipped with the air floatation axle hole, and the air floatation axle hole is communicated with the air floatation axle hole. The holding clamp body and / or the shell are / is provided with an air inlet communicated with the annular air cavity, the holding clamp body is provided with multiple rows of radial holes distributed in the circumferential direction, the radial holes form an air inlet end on the outer wall face of the holding clamp body, and the radial holes form an air outlet end on the hole wall of the air floating shaft hole. The hole diameter of the air inlet end of the radial hole is larger than that of the air outlet end of the radial hole, and the hole diameter of the air outlet end of the radial hole is not larger than 0.1 mm. The hole diameter of the air outlet end of the radial hole is not larger than 0.1 mm, a micropore throttling structure is formed, compared with small hole throttling, micropore throttling can greatly improve the rigidity of the air bearing, and consumed air flow is smaller.

The present disclosure provides a method for intradermal delivery of a serum comprising pre-conditioning a target area of the subject's stratum corneum by contacting the area with a device comprising a cartridge and nanotip, the pre-conditioning comprising moving the device in vertical, horizontal, and circular motions over the target area for 15 to 20 seconds per 2×2 cm portion to mechanically abrade the stratum corneum; filling the cartridge with a serum composition comprising biologically active agents; inserting the cartridge into the device inlet and holding vertically for 5 seconds; applying the serum to the pre-conditioned area by actuating the device to vibrate at 5800 to 8800 revolutions per minute and dispense serum through micro-ports positioned adjacent the nanotip, comprising moving the device in vertical, horizontal, and circular motions for up to 60 seconds; and optionally massaging the serum into the treated area.

This utility model discloses a digital dental 3D-printed titanium framework, comprising a pure titanium frame, a support mechanism and an occlusal mechanism on the pure titanium frame, the support mechanism including an upper support rod and a lower support rod, the top of the upper support rod being fixedly connected to a bone contact surface, the bone contact surface having multiple first micropores, multiple embedded protrusions at the outer edge of the bone contact surface, and first positioning markers on the bone contact surface, and multiple triangular support components between the upper and lower support rods, the triangular support components including a first support rod and a second support rod, belonging to the field of medical device technology. This digital dental 3D-printed titanium framework acquires three-dimensional data of the patient's teeth and jaws through an intraoral scanner, uses selective laser melting equipment, and selects medical-grade Ti-6Al-4V ELI alloy powder as the printing material, effectively improving accuracy, shortening the processing cycle, reducing weight, improving osseointegration efficiency, and reducing costs.

A strap (3), two complementary closing elements (4, 5) configured to be able to close the collar (1) in a loop closed on itself, a sheath (2) linked to the strap (3), said sheath (2) comprising an inner face provided with a microperforated body and an outer face made of waterproof material, the inner face being provided with a pocket (11) having an opening (12) and configured to allow the diffusion of an antiparasitic treatment molecule through said microperforated body. Figure for the abstract: Fig 1

The utility model provides a copper mold core for solving mold exhaust, and aims to solve the problems of unsmooth mold exhaust, bubble accumulation, material adhesion, difficult demolding and the like. The copper mold core mainly comprises a mold core column body, a forming groove, an exhaust micropore, an exhaust groove, a fixing lug and a surface coating. The mold kernel column body is made of copper or copper alloy and has excellent thermal conductivity; the forming groove is formed in the top of the mold kernel column body, and the smoothness of the formed surface is ensured through high-precision machining and polishing; the exhaust micropores and the exhaust grooves are respectively formed in the interior of the forming groove and the edge of the mold kernel column body and are used for effectively exhausting gas in the forming process and avoiding bubble retention; and the fixing lugs are used for stably mounting the mold core on production equipment. Through the design, the exhaust effect of the mold is remarkably improved, the forming quality of contact lenses is improved, the demolding process is smooth, and the service life of the mold is prolonged. The method is suitable for the production field of contact lenses and other high-precision medical instruments, and has wide application prospects.

The invention relates to an automatic liquid flow test tool for a micro pore plate, which improves the automatic test capability and test efficiency of a component automatic test system, and belongs to the technical field of liquid rocket engine component liquid flow test. The tool comprises a tool block, an upper hold-down ring, a lower hold-down ring, an upper sealing ring, a lower sealing ring and an inner hexagonal screw. The tool block is provided with an upper pressing ring sinking groove, a lower pressing ring sinking groove, an upper sealing ring installation positioning hole, a lower sealing ring installation positioning hole and a hole plate installation positioning hole. The upper sealing ring is placed in the upper sealing ring mounting and positioning hole, the upper pressing ring is pressed on the upper sealing ring and matched with the upper pressing ring sinking groove for pressing, and the upper pressing ring and the tool block are fastened through the inner hexagon bolt; a lower sealing ring is placed in a lower sealing ring mounting and positioning hole, a lower pressing ring is pressed on the lower sealing ring and is matched with a lower pressing ring sinking groove for pressing, and the lower pressing ring and the tool block are fastened through an inner hexagon bolt; and the pore plate is assembled in the pore plate mounting and positioning hole.

The invention belongs to the technical field of medical instruments, and discloses an articular cavity continuous lavage device which comprises a double-cavity drainage perfusion assembly and a fixing lantern ring. The double-cavity drainage perfusion assembly comprises an inner sleeve, the outer side of the inner sleeve is coaxially connected with an outer sleeve in a sleeving mode, a drainage channel is defined between the outer wall of the inner sleeve and the inner wall of the outer sleeve, and a flow channel in the inner sleeve is a perfusion channel; a plurality of lateral micropores are formed in one end of the inner sleeve, the other end of the inner sleeve is detachably connected with the perfusion device through a first connector, and the end, away from the lateral micropores, of the drainage channel is detachably connected with a drainage bag through a second connector; the fixing lantern ring is arranged on the outer side of the outer sleeve in a sleeving mode, fixing wings are arranged on the two sides of the fixing lantern ring, and suture holes are formed in the fixing wings. The technical problems that a catheter of an existing lavage device is prone to being blocked, fixation is not firm, and the joint fluid drainage extraction efficiency is low are solved.

The invention provides a hip joint surface replacement prosthesis suitable for severe acetabulum defects, and belongs to the technical field of medical instruments. The three-wing acetabulum outer cup prosthesis is made of metal cobalt-chromium-molybdenum materials, a titanium alloy coating and a hydroxyapatite coating are arranged on the surface of the three-wing acetabulum outer cup prosthesis, and the coatings are of a micropore structure. The upper wing, the middle wing and the lower wing are connected to the circumferential surface of the three-wing acetabulum outer cup prosthesis in a sliding mode; the upper wing, the middle wing and the lower wing of the hip joint surface replacement prosthesis are designed into shapes matched with a bone anatomical structure of a patient, so that the prosthesis can be tightly attached to an acetabulum area of the patient. According to the personalized adaptive design, necessary initial stability is immediately provided after an operation, a solid foundation is laid for early movement and recovery of a patient after the operation through a multi-point fixing mechanism, and the risk of complications caused by prosthesis looseness is reduced.

The invention provides a quantitative drug delivery spray head for nasal cavity postoperative care, which comprises a spray head shell main body, a quantitative drug delivery piston assembly, an atomizing nozzle assembly, a power wrench, a catheter, a drug delivery bottle connecting cap, a quantitative storage cavity, an antifouling protection cavity assembly, a conduction tube cavity and a fixed hanging ring, and the quantitative dosing piston assembly is connected with the spray head shell main body and the power wrench. By means of the precise piston-cylinder body structure and the fixed stroke spring, it is guaranteed that the volume height of liquid medicine sprayed out by pressing every time is consistent, the problem that medicine is excessively or insufficiently used is effectively solved, and the safety and effectiveness of treatment are guaranteed; a three-stage atomization mechanism of micropore spraying, vortex atomization and mechanical impact is combined, generated fog drops are fine in particle size and concentrated in distribution, a wide and uniform spray field can be formed in cooperation with guiding of the vortex diffusion cover, and it is ensured that medicine can fully cover a wide area and crypt wrinkles in the nasal cavity without missing dead corners.