59 results about "Secondary surgery" patented technology

The invention discloses a minimally invasive degradable reduction device for thoracolumbar vertebral fracture, and relates to the technical field of medical instruments. The mounting mechanism is mounted on the outer wall of the connecting rod in a sleeving manner; the pedicle screw is movably inserted into the middle of the top end of the mounting mechanism; an implantation mechanism; through cooperative work of the connecting rod, the mounting mechanism, the pedicle screw and the connecting mechanism, the whole reduction device adapts to minimally invasive approach modes such as percutaneous puncture and can be implanted into the body of a patient through a percutaneous puncture channel, a skin incision of the minimally invasive approach is small, damage to surrounding tissue is greatly reduced, and the reduction effect is good. Due to the layered design of the screw body in the pedicle screw, bone tissue ingrowth is promoted while the supporting strength is kept, and the reduction device is made of degradable materials, can be gradually degraded along with fracture healing after an operation and is metabolized and absorbed by an organism, and does not need to be taken out through a secondary operation, so that physical and mental pain of a patient is relieved; and the medical cost and the potential risk of the secondary operation are also reduced.

The utility model relates to technical field of ureteral stent solves the technical problem that ureteral stent still needs special operation to take out, especially to a kind of ureteral stent of operation-free convenient to take out, including as the support base ureteral stent body, the ureteral stent body outside is provided with the limiting component for increasing its limiting capacity, the ureteral stent body bottom end is provided with the convenient component for taking out from the patient's body, the convenient component includes the fixed seat fixedly connected in the bottom of ureteral stent body both sides, the utility model discloses because the setting of convenient component, the process of ureteral stent body can be taken out from human body inside more convenient, and will not hurt patient urethra, so that patient oneself can also take out, need not suffer the harm of secondary operation, can also alleviate the burden of doctor simultaneously.

The present application relates to the technical field of medical devices, and provides a system with a spiral structure for cavity embolization and a delivery method, the system comprising: an embolization device which is in a spiral structure in a natural state and can be freely stretched and contracted under stress; the embolization device comprises an inner mesh layer and an outer mesh layer which are concentrically arranged, and the sparseness of the outer mesh layer is greater than that of the inner mesh layer; the embolization device is used for sleeving the embolization stent and the inner circle of the spiral structure is tightly attached to the outer wall of the embolization stent. The system, after the release of the embolization device with a spiral structure, can tightly adhere to the periphery of the embolization stent, increase the diameter of the cavity part of the embolization stent, fill the entire cavity or cyst in a physical occupation manner, improve the occlusion effect, avoid the occurrence of internal leakage, and thus avoid secondary surgery. Moreover, since the sparseness of the outer mesh layer is greater than that of the inner mesh layer, the blood flow direction can be better changed, the blood flow speed is reduced, the endothelial material in the blood is quickly deposited in the embolization, the endothelialization is completed, and the tumor cyst is atrophied.

The invention discloses an absorbable particle cannula loaded with double radiosensitizers, and aims to effectively improve the internal radiation radiotherapy effect and facilitate implantation of radioactive particles, and the whole material can be degraded and absorbed in vivo and does not need to be taken out through a secondary operation. The absorbable particle sleeve mainly comprises an absorbable particle sleeve body for packaging radioactive particles, a spacer which is arranged in the sleeve body and is used for spacing the radioactive particles, and a polydopamine coating which is loaded with a double radiosensitizer of metal nanoparticles and aromatic ring structure drugs. In the polydopamine coating, the metal nanoparticles are nanoparticles formed by reducing metal ions on the surface of the coating in situ through catechol groups of polydopamine; and the medicine is loaded on the surface of the coating through non-covalent acting force (pi-pi stacking action, hydrophobic interaction and / or electrostatic attraction).

This invention belongs to the field of medical devices, specifically a combined internal fixator and fixation method for fixing joints with micro-motion. The combined internal fixator includes a first bone screw and a second bone screw. A movable connecting structure is provided between the connecting ends of the first and second bone screws. The movable connecting structure includes a groove and a shaft. The groove includes an insertion port and a mounting groove communicating with the insertion port. The mounting groove has a semi-circular cross-section. The shaft includes a semi-circular shaft adapted to the mounting groove, which is rotatably accommodated within the mounting groove, allowing the first and second bone screws to rotate relative to each other around a first radial axis. This invention, through a hook-groove sliding self-locking structure, achieves controllable micro-motion and integrated implantation for fixing joints with micro-motion. It has achieved significant technological advancements in preserving joint physiological function, simplifying surgical procedures, avoiding secondary surgeries, and reducing the incidence of complications. It has important clinical application value and is suitable for fixing joints with micro-motion.

The invention discloses an optimization method, device and equipment of a biodegradable bone fracture plate and a storage medium, and is applied to the technical field of medical instruments, and the method comprises the following steps: constructing a finite element model of femoral shaft fracture; in the finite element model, applying a dynamic biomechanical load simulating a human body walking cycle; the stress level of the bone fracture plate and the displacement level of the fixed thighbone are used as optimization targets, and multi-dimensional parameters of the bone fracture plate are optimized; delimiting a safety area of the bone fracture plate according to the optimized bone fracture plate design parameters; according to the method, the technical steps of base material type selection and process optimization, finite element model construction and dynamic load application, multi-dimensional parameter optimization, safety area demarcation and personalized adaptation and the like are organically combined; the technical problems of secondary operation, stress shielding, high biological safety risk, poor adaptability, high engineering difficulty and the like of a traditional bone fracture plate are effectively solved.

This invention discloses a piezoelectric sensing adaptive internal pressure fixation bone plate system for treating tibial plateau fractures, belonging to the field of orthopedic implantable medical devices. It includes a bone plate, pressure bolts, and an external control module. The bone plate is available in three specifications according to the Schatzker classification: lateral L-type, medial T-type, and bilateral composite type, with transverse internal pressure holes. The pressure bolts embed a PZT-5H piezoelectric sensing device and have an overload-resistant groove between the head and neck, enabling real-time acquisition of the compressive stress at the bolt-bone interface. The external control module transmits signals wirelessly via Bluetooth 5.0 and uses a PID algorithm to non-contactly drive the bolts via magnetic field coupling to adaptively adjust the compressive stress to 30–50 MPa. The system has two levels of safety protection: 55 MPa coil power-off protection and 80 MPa groove breakage protection. This system eliminates the need for secondary surgery, dynamically maintains optimal stress throughout the fracture healing cycle, with a healing time ≤12.5 weeks, a complication rate ≤4%, and an excellent / good knee HSS score rate ≥88%. It is suitable for Schatzker type I-VI tibial plateau fractures.

The invention provides a peripheral nerve stimulation system. The peripheral nerve stimulation system comprises a stimulation front end, a release part, a wire and a base, the stimulation front end and the release part are used for being implanted into a body, and the stimulation front end is used for being connected with a target nerve; the base is used for being arranged outside a body; the two ends of the wire are connected with the base and the stimulation front end respectively. The base is configured to send stimulation energy to the stimulation front end through the wire; wherein the stimulation front end is configured to be degradable, and the release part is configured to drive the wire to be released and separated from the stimulation front end when receiving release energy from the base; after the lead is disengaged from the stimulation front end, the lead is configured to be removed from the body. By means of the configuration, the precision and effectiveness of intraoperative electrical stimulation treatment and the convenience of percutaneous electrical stimulation treatment are achieved at the same time, and a secondary operation can be omitted after treatment is completed.

The utility model is applicable to the technical field of medical care equipment, and provides a lifting pillow for preventing lower limbs from rotating inwards, which comprises two side plates respectively arranged on two sides of a fixed bottom plate, a positioning plate arranged at one end of the fixed bottom plate, one ends of the two side plates are respectively connected with the fixed bottom plate, and the other ends of the two side plates are respectively connected with the positioning plate. The upper fixing belt is arranged in a semi-open cavity formed by the fixing bottom plate, the side plates and the positioning plate, the two ends of the upper fixing belt are connected to the two side plates respectively, the two ends of the positioning fixing belt are connected to the back face of the positioning plate respectively, and the two ends of the reinforcing tensioning piece are connected to the upper portion of the positioning plate and the top faces of the side plates respectively. The lower limbs of a patient are effectively fixed through the lifting pillow, the phenomenon of dislocation of the artificial prosthesis caused by unconscious inward rotation, adduction, excessive hip bending and the like is effectively eliminated, the secondary operation phenomenon caused by dislocation of the artificial prosthesis is eliminated, the nursing quality of the patient is improved, and nursing intervention is enhanced. The risk of prosthesis dislocation is reduced, detumescence is facilitated, the treatment effect is improved, and early rehabilitation of a patient is effectively promoted.

The application discloses a pedicle screw system, which comprises a screw expansion sleeve, a screw body, a fixing base, a fastening nut, a fixing rod, a guide cylinder and a bone cement injection device; the screw expansion sleeve is provided with a connecting sheet with a gradient structure and expansion wings with through grooves, can reversely engage with a bone hole, and has good anti-loosening effect. The guide cylinder can realize component positioning and assembly guiding, and can also cooperate with the bone cement injection device to complete preoperative bone cement pre-injection strengthening before the screw body and the fixing base are assembled. The fixing base is provided with a guide plate and a limiting type fixing rod, and assembly positioning is convenient. The pedicle screw system has high fixing strength, is suitable for osteoporosis patients, does not need secondary surgery, is simple in assembly, and has strong clinical practicability.

The invention discloses an axial micro-motion and rigid locking dual-mode switchable fracture external fixation support, and relates to the technical field of orthopedic medical instruments, and the key points of the technical scheme are that the fracture external fixation support comprises two bone needle assemblies; the outer sleeve is connected with one bone needle assembly; the telescopic inner core rod is connected with the other bone needle assembly and is sleeved in the outer sleeve in an axial sliding manner; the elastic buffering assembly is arranged between the outer sleeve and the telescopic inner core rod; the mode switching assembly is arranged on the telescopic inner core rod and can be operably connected with or separated from the outer sleeve; when the mode switching assembly is separated from the outer sleeve, the telescopic inner core rod can axially slide relative to the outer sleeve and act on the elastic buffering assembly. When the mode switching assembly is connected with the outer sleeve, the telescopic inner core rod is rigidly connected with the outer sleeve through the mode switching assembly. Fixing modes can be conveniently switched according to different stages of fracture healing, secondary operation is not needed, and the fracture healing environment is optimized.

The invention discloses a drainage self-closing device for preventive ileum fistulization, relates to an ileum fistulization device, and aims to solve the problem that the conventional preventive ileum fistulization method needs a secondary operation. The device comprises a Y-shaped drainage tube, a water injection tube, an air injection tube, a purse string, a suture line, a knot pushing rod and a suture needle, wherein a bag receiving hole is formed in the side wall of the inlet end of the Y-shaped drainage tube, and the tube wall of the outlet end of the Y-shaped drainage tube is a T-shaped tube wall; the end part of the gas injection tube is a balloon; the knot pushing rod is a hollow pipe, a lower hole is formed in the lower end of the pipe, and a wire outlet hole is formed in the side wall of the pipe close to the lower hole; and an inclined plate plug is arranged at the upper part of the wire outlet hole in the hollow pipe. The device is used for fistulization, healing of the fistulization opening is accelerated, and the device can be used for clinical medicine, in particular to the field of gastrointestinal surgery.

The invention provides a dynamic separable distal tibiofibular syndesmosis injury fixing screw, and belongs to the field of surgical instrument equipment. A recovery channel is arranged in the far-end screw body, a mechanical tension structure is arranged in the recovery channel, the mechanical tension structure comprises a pre-pressing spring and a shear pin, and one side of the shear pin is connected with the near-end screw body; a shearing seam is formed in the connecting position of the shearing pin and the near-end screw body, an open groove is formed in the center of the shearing seam, a blocking piece is arranged in the open groove, a limiting groove is formed in the outer wall of the shearing pin, one end of the pre-pressing spring is connected with the shearing pin, the other end of the pre-pressing spring is connected with a sealed cabin, and a solution capsule is arranged in the sealed cabin. A limiting ring is arranged on one side of the sealed cabin, and a fixing assembly is arranged on one side of the limiting ring; a protective film is arranged on one side of the shearing seam, load triggering separation is achieved through a mechanical tension structure, a secondary operation is avoided through a built-in recovery channel, the sealed cabin can release healing promoting medicine, and the advantages of dynamic fixing and healing promoting are achieved.

This application discloses a hydrogel composition, its preparation method, and its applications, relating to the fields of regenerative medicine and biomedical materials technology. The hydrogel composition comprises o-nitrobenzyl alcohol-modified tetra-arm polyethylene glycol and methacrylated hyaluronic acid. The hydrogel composition provided in this application addresses the problems in related technologies that rely on tissue flaps or prostheses for repair, such as large trauma, easy foreign body reaction, asymmetrical shape, unnatural feel, and the inability of tissue engineering materials to be rapidly molded intraoperatively, requiring secondary surgery.

The invention discloses a treatment fixing device for rib fracture, and belongs to the technical field of medical instruments. The device comprises a surrounding claw, the surrounding claw is composed of grasping parts, a top face and a locking part, and the two grasping parts are symmetrically arranged at the front end and the rear end of the top face and jointly form a grasping space used for fixing a fracture part; a locking belt of the locking part is clamped with a buckle on the top face through meshing teeth, and anti-reverse teeth in the buckle ensure stable locking. One or more embracing claws connected through the connecting parts can be selected according to the fracture condition, the whole embracing claw is made of absorbable materials, and the grasping force is enhanced through the threaded structures of the top faces and the inner surfaces of the connecting parts. The fixing device is good in fixing effect and suitable for different fracture scenes, secondary surgery is avoided due to the degradable characteristic, and the problems that in the prior art, a fixing device is poor in adaptability, foreign matter is left and the like are effectively solved.

This invention discloses a powder composition for the prevention and treatment of symblepharon (eyelid-eye-ball adhesion). The powder composition comprises a polymer material that cross-links with each other upon contact with an aqueous medium, forming a hydrogel isolation membrane in situ at the wound surface. This invention also discloses the application of the above-mentioned powder composition in the preparation of medicaments for the prevention and / or treatment of symblepharon. The powder composition provided by this invention, when applied to ocular surface wounds, rapidly forms a physical isolation layer in situ. This formed physical isolation layer exhibits good stability and can be gradually and gently degraded without the need for secondary surgical removal.

The invention relates to a biomechanical experiment method of a novel magnesium controlled-release dynamic intramedullary nail, which comprises an intramedullary nail, a nail-withdrawing-preventing bolt, a material exchange hole and a gasket, the surface of the intramedullary nail is provided with an upper hole and a lower hole, the upper hole is the nail-withdrawing-preventing bolt, the lower hole is the material exchange hole, the gasket is embedded in the middle of the surface of the intramedullary nail, and the gasket is embedded in the middle of the surface of the intramedullary nail. A magnesium controlled release-dynamic compression coupling mechanism is provided for the first time, and a degradable material technology is combined with an orthopedic internal fixation dynamic idea; the magnesium alloy gasket structure is innovatively designed, automatic power compression of the intramedullary nail is achieved, and the intramedullary nail is powered without a secondary operation; innovative application of the magnesium alloy in large orthopedic implants is created, and the application field of degradable materials is expanded.

The application discloses an intelligent oral cavity barrier film, a monitoring system and a method for bone combination state. The intelligent oral cavity barrier film comprises: a degradable metal layer configured to include an inductor coil, a first plate of a capacitor, and a porous support area integrally connected with the inductor coil; a dielectric polymer layer; a second plate of the capacitor separated from the first plate by the dielectric polymer layer; the inductor coil, the first plate of the capacitor, the second plate of the capacitor and the porous support area are integrally formed by laser cutting from a whole piece of the degradable metal layer; wherein the inductor coil, the first plate, the dielectric polymer layer and the second plate jointly constitute a passive LC resonance circuit; the quality factor Q of the LC resonance circuit is configured to change in response to the change of ion concentration in the environment around the dielectric polymer layer, and the bone combination state can be wirelessly monitored by an in-vitro reading device. The application has mechanical support and complete degradability, and reduces the risk of secondary surgery.

The present application relates to the technical field of cardiac pacing electrode, in particular to a telescopic cardiac pacing electrode, which comprises a pulse pacemaker and an electrode lead, the electrode lead comprises an insertion end, a connecting sleeve, a conductive core wire and an electrode end, the insertion end, the connecting sleeve and the electrode end are sequentially fixedly connected, the insertion end is insertedly matched with the pulse pacemaker, the connecting sleeve is internally provided with the conductive core wire, the two ends of the conductive core wire are respectively connected with the insertion end and the electrode end, and the pulse pacemaker generates a pulse electric signal which is transmitted to the inside of an organ through the electrode end; in the present application, the telescopic members and the fixing members are staggered in the subcutaneous section, the initial length is the shortest, the spacing of the fixing members anchored in the subcutaneous tissue is increased with the growth of the patient's trunk, the telescopic members are axially stretched, the length adjustment range covers the entire growth period from childhood to adulthood, the risk of electrode lead tightness, electrode displacement or breakage is fundamentally eliminated, and secondary surgery is avoided.

The invention discloses a personalized implantation structure and method for improving insufficient chin anterior movement in a chin shaping surgery, the personalized implantation structure comprises an implant and a chin anterior movement osteotomy matched with the implant, and the implant is fixed on the chin anterior movement osteotomy. Compared with the prior art, osteotomy forward movement and the implant are combined together to be applied to the chin forming operation, and when the chin bone mass of a patient is insufficient, supplementation can be conducted through the implant. Compared with an autogenous bone or an artificial bone for transplantation, the implant does not need to face the problems of absorption, rejection and the like, and the risk of a secondary operation cannot be increased; meanwhile, compared with the mode that the prosthesis is completely adopted for implantation, the burden of mandibular fibrous tissue can be relieved, and the risk of implant displacement can also be reduced.

The invention provides a degradable magnesium alloy, a preparation method and application of the degradable magnesium alloy, a degradable magnesium alloy bone fracture plate system and a preparation method and application of the degradable magnesium alloy bone fracture plate system, and relates to the technical field of medical materials. According to the method, magnesium alloy is subjected to micro-arc oxidation in electrolyte to form a micro-arc oxidation coating, and the degradable magnesium alloy is obtained; the magnesium alloy comprises the following components in percentage by mass: 0.5 to 6 percent of calcium, 0.5 to 1.5 percent of zinc and 92.5 to 99 percent of magnesium. The magnesium alloy with specific composition is excellent in mechanical property, can provide stable mechanical fixing strength for a fracture part, avoids stress shielding, can be completely absorbed for a long time, and avoids pain caused by taking out of a second operation. According to the micro-arc oxidation coating prepared by adopting the specific electrolyte, the corrosion resistance of the magnesium alloy can be remarkably improved. The components of the magnesium alloy and the micro-arc oxidation coating in the degradable magnesium alloy provided by the invention are elements required by a human body, no toxic or harmful element is introduced, and the degradable magnesium alloy has good biocompatibility with the human body.

The invention discloses a split type deep body temperature monitoring device, a preparation method and application, and belongs to the technical field of temperature monitoring. The monitoring device is prepared from a biodegradable material and comprises a double-layer electrode layer, a spacing layer, a connecting channel, a dielectric layer and a packaging layer, wherein each of the upper electrode layer and the lower electrode layer comprises a spiral inductance coil, a snakelike connecting line and a capacitor plate; the spiral inductance coils are arranged on two sides of the spacing layer, are opposite in rotation direction and are connected in series through the connecting channel to enhance mutual inductance; the snakelike connecting line is used for connecting the spiral inductance coil and the capacitance pole plate, and mechanical flexibility is improved. The split type design is adopted, deep body temperature monitoring is well achieved, the wireless reading distance and the Q value are remarkably increased through cooperation of the double-layer asymmetric coils connected in series, and therefore the accuracy of deep body temperature monitoring is comprehensively improved. Moreover, the sensor is made of a fully degradable material, so that the sensor is prevented from being taken out by a secondary operation, and the sensor has a good biomedical application prospect.

The utility model discloses a self-locking type titanium cable fixing and locking buckle for fracture surgery, and relates to the technical field of medical instruments, the self-locking type titanium cable fixing and locking buckle comprises a locking buckle main body and a threaded pressing sleeve, the locking buckle main body comprises a threaded hole, a through hole and a front chamfer, the threaded hole is formed in the top of the locking buckle main body and extends into the locking buckle main body, and the through hole is formed in the top of the locking buckle main body. The through hole is formed in the side face of the locking buckle body and penetrates through the locking buckle body, the threaded pressing sleeve comprises a self-holding plum blossom and a thread, and the thread is fixedly connected with the self-holding plum blossom. The standardized operation of the torque handle avoids unstable fixation and reduction of the slipping rate of the titanium cable caused by force difference of an operator, meanwhile, the thread self-locking structure can bear continuous tension when the patient bears weight, the risk of a secondary operation is completely eradicated, the locking effect is controllable, and the slipping risk is reduced.

The application discloses a tibial plateau fracture locking bone plate system with a self-adaptive locking mechanism and transverse internal pressure, comprising a bone plate body, a self-adaptive locking bolt (ASB) and a passive-active hybrid driving module. The bone plate is provided with a transverse internal pressure groove; the ASB is integrated with double-lead threads, a check ratchet, a shape memory alloy gasket, a thin film strain gauge, NFC sensing and a piezoelectric micro motor; through body temperature triggering and external percutaneous coupling, automatic / semi-automatic adjustment of locking force is realized, quantitative intraoperative pressure, real-time postoperative monitoring, whole-process adaptive stress control are realized, the fracture end is maintained in an optimal healing window of 30-50 MPa, reduction loss, internal fixation failure and secondary surgery rate are significantly reduced, and the system is suitable for intelligent internal fixation of various tibial plateau fractures.

The application discloses a rib fracture embracing type internal fixator, and relates to the technical field of orthopedics. The rib fracture embracing type internal fixator comprises an embracing plate, a plurality of embracing ends are arranged on the two long side walls of the embracing plate, the embracing plate is arranged in a C-shaped structure, is used for being transversely clamped at the fracture end of a fractured rib, the tensioning sheet is arranged in a C-shaped structure, the two end portions of the tensioning sheet can be arranged outside two opposite embracing ends on the embracing plate to form an embracing space, the space in the embracing space can be contracted and expanded for adjusting, and is used for accommodating fractured rib ends at different positions. The rib fracture embracing type internal fixator can stably fix the fractured rib position, and degradable material is adopted, so that secondary surgery is avoided.

The invention discloses a micro-motion intramedullary nail, and relates to the field of medical instruments, the micro-motion intramedullary nail comprises an intramedullary nail main body, the intramedullary nail main body is composed of a far-end nail body and a near-end nail body, the far-end nail body is provided with a far-end interlocking screw hole, the near-end nail body is provided with a near-end interlocking screw hole, a micro-motion assembly is arranged between the far-end nail body and the near-end nail body, and the micro-motion assembly is connected with the near-end nail body. The micro-motion assembly comprises an absorbable block and a limiting nail body, and a femtosecond laser modified coating used for promoting fracture healing is arranged on the outer wall of the intramedullary nail body. According to the micro-motion intramedullary nail, by arranging the micro-motion assembly, the problem of stress shielding caused by the fact that an existing intramedullary nail is not matched with the elastic modulus of bone tissue is effectively solved, a proper micro-motion space is provided in the fracture healing period, the situation that the intramedullary nail excessively bears stress is avoided, the bone mass loss and osteoporosis risks are reduced, the secondary fracture probability is reduced, and the fracture healing period is shortened; meanwhile, the absorbable block does not need to be taken out through secondary operation, and pains and medical burdens of patients are relieved.

This invention discloses a method for radiotherapy target localization based on biodegradable radiopaque ceramic markers. The method involves customizing and standardizing biodegradable radiopaque ceramic markers to match the radiotherapy cycle, based on pre-defined tumor lesion parameters and full-cycle radiotherapy parameters. Target area image data of the implanted non-coplanar markers are acquired, and coordinate system registration, precise target delineation, and radiotherapy planning parameters are determined based on CT thin-slice images. Before radiotherapy, the markers are used to verify their position, and positioning correction parameters are output for radiotherapy equipment calibration. After radiotherapy, the degradation of the markers is monitored based on follow-up images. This invention achieves precise radiotherapy target localization, uses markers without artifact imaging, has a degradation cycle precisely matched to the radiotherapy cycle, is completely degradable without the need for secondary surgery, and exhibits excellent biocompatibility.

The invention relates to the technical field of medical instruments and equipment, in particular to a special bone fracture plate for posterior PiLon fracture, which comprises a bone fracture plate body integrally in a T-shaped curve shape, integrally formed by a near end, a middle section and a far end and sequentially connected along the vertical direction; an angle fixing seat; fluorescence mark points; a groove; and compounding a growth factor coating. The device is reasonable in structure, the anatomical structure of an articular surface can be effectively recovered through personalized design and accurate fitting, and the risk of traumatic arthritis is reduced; due to the multi-angle fixing design, the holding force on a fracture block is enhanced, and displacement and looseness are reduced; the operation time is shortened and the radiation exposure is reduced through fluorescence mark assisted positioning; due to the design of the grooves and the fillets, soft tissue compression and friction are reduced, and the occurrence rate of complications is reduced; the honeycomb structure and the composite growth factor coating promote bone healing, and the recovery period is shortened; the gradient degradation material avoids secondary operation, and the burden of a patient is relieved.

The invention relates to the technical field of biomedical engineering and implantable medical instruments, in particular to a biodegradable flexible wireless implantable intracerebral heating device and a preparation method thereof. The device is of a layered structure and sequentially comprises a porous bioprotein substrate layer and a silk protein nanofiber membrane prepared by adopting an electrostatic spinning process from bottom to top, and the crystallinity and degradation rate of the silk protein nanofiber membrane are adjusted through ethanol annealing treatment. And the lower hydrophobic encapsulation layer is positioned on the substrate layer, is made of a biodegradable hydrophobic polymer, preferably polylactic acid (PLA), and is used for isolating biological fluid. And the wireless heating layer is positioned on the lower hydrophobic packaging layer and is formed by depositing a biodegradable metal material, preferably zinc (Zn). And the upper hydrophobic packaging layer covers the wireless heating layer and forms a sealed package for the heating layer together with the lower layer, so that the metal layer is prevented from being corroded by the body fluid too early. The device aims at solving the problems that an existing intracerebral implantation device needs to be taken out through a secondary operation and mechanical mismatch is caused.

The utility model relates to the technical field of bone fixing devices, and particularly discloses a completely degradable composite anchor with a line. The composite belt line anchor comprises an anchor body and a threading hole, wherein the anchor body comprises a columnar core body and a coating layer coating the columnar core body; a thread is arranged on the coating layer for coating the columnar core body; the columnar core body is made of a biodegradable metal material, and the coating layer for coating the columnar core body is made of a biodegradable high polymer material. According to the composite anchor with the line, the biodegradable high polymer material serves as a matrix phase, the biodegradable metal material serves as a reinforcing phase, combination of the two phases is enhanced through structural design and surface treatment, and the composite anchor with the line can be completely biodegraded and is excellent in mechanical strength, especially drawing resistance. The prepared composite anchor with the line can be completely degraded in vivo, huge pain caused by a secondary operation to a patient can be effectively avoided, and anchor with the line with different mechanical property requirements can be customized according to requirements.