16 results about "Internal Fixators" patented technology

The present application proposes a sternum internal fixator made of a shape memory alloy, comprising: a fixing plate (1) which has a sheet shape extending in a first direction (W) and a second direction (L) which are perpendicular to each other, is bent toward the inner surface side thereof in the first direction (W) within a body temperature range, and is used for fitting a sternum; a plurality of embracing arms (3) which extend from the two ends of the fixing plate in the first direction, are bent towards the inner surface side in an arc shape within the body temperature range, and are used for embracing the sternum between adjacent ribs; the fixing arms (2) extend from the two ends, in the second direction (L), of the fixing plate respectively, each fixing arm comprises a first section (21) and a second section (22), in the body temperature range, the first sections extend continuously with the fixing plate (1), and the second sections are connected with the first sections and bent by more than 90 degrees relative to the first sections.

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.

This invention addresses the problem of blind ends in existing non-invasive gynecologic oncology treatment methods by providing a novel fixation mold for a vaginal stump radiotherapy treatment device. The mold includes an external base for connecting to an external structure and an internal fixator for fixing the tube. One end of the internal fixator is fixedly connected to one side of the external base. The internal fixator contains a U-shaped flexible tube channel, with both ends of the channel penetrating the external base and communicating with the outside. This allows the treatment tube to radiate the apex of the vaginal stump at close range, overcoming the offset point problem in traditional non-invasive treatment methods.

The utility model discloses a positioning device of a hand fracture internal fixator, which comprises a positioning plate, a plurality of guide holes are formed in the positioning plate in a penetrating manner, and threaded connection holes are formed in the upper parts of several of the guide holes; a plurality of threaded connectors in threaded connection with the threaded connection holes are further included, first screwing bolts are arranged at one ends of the threaded connectors, extrusion shafts are arranged at the other ends of the threaded connectors, and the extrusion shafts are sleeved with rubber connection pipes movably connected with the extrusion shafts. The rubber connecting pipe comprises a sleeve with the same inner diameter as the extrusion shaft and an expansion pipe with the inner diameter smaller than that of the extrusion shaft and the outer diameter equal to the inner diameter of the fixing hole in the steel plate of the internal fixator; and each positioning bone nail comprises a positioning shaft, a second screwing bolt arranged at one end of the positioning shaft, and a thin bone nail arranged at the other end of the positioning shaft. The guide punching device is used for conducting guide punching in combination with a steel plate, the inclination degree of punching is precisely limited, nuts of connected bone nails can be perfectly attached to fixing holes in the steel plate, and the fixing effect is better.

The invention relates to the technical field of medical instruments, in particular to a thoracoscopic rib plate fixator and a thoracoscopic rib plate fixing method, and belongs to internal fixing equipment and a matched fixing method which are suitable for combination of an endoscopic technology and rib fracture minimally invasive repair. The memory alloy rib fracture internal fixation device or bone fracture plate is convenient to install, reasonable in structure, safe and reliable, and meets the requirement for minimally invasive surgery, so that the minimally invasive surgery of thoracoscope chest wall subcutaneous or submuscular diving tunnel rib fracture fixation is completed. Through the split type design of the embracing arms, the position of an affected bone can be conveniently adjusted under a thoracoscope, operation obstacles caused by premature recovery of the embracing arms are reduced, and the main purposes of reducing shape recovery of the embracing arms of the product due to the fact that the product is affected by the thoracic cavity environment during installation, reducing operation time and providing a more excellent medical instrument product for a patient are achieved.

The application relates to the technical field of surgical assistance, and discloses a foot deformity correction surgery planning and implementation method, which comprises the following steps: fusing multi-modal medical images and dynamic function data to construct a high-fidelity foot digital twin model; intelligently quantitatively evaluating and mechanismally analyzing deformities by using a deep learning network combined with a knowledge graph; automatically optimizing in a virtual space by using a multi-agent reinforcement learning algorithm to generate a personalized surgery plan verified by biomechanical simulation; converting the optimized scheme into augmented reality navigation information and robot control instructions to guide a surgical robot to perform adaptive and accurate osteotomy and reduction operations; dynamically evaluating execution deviations and guiding correction by using real-time three-dimensional scanning and registration technology during the operation, and intelligently matching and implanting internal fixators; immediately performing function verification after the operation, and generating a personalized digital rehabilitation scheme and long-term curative effect prediction for the patient based on the operation result. The application constructs an intelligent surgery ecological system throughout the whole process of "diagnosis, planning, implementation, evaluation and management", and significantly improves the accuracy, safety, predictability and scientific level of curative effect management of foot deformity correction surgery.

The invention relates to the technical field of medical treatment, in particular to an ankle joint fracture reduction assisting method under the guidance of a digital image, which comprises the following steps: acquiring CT image data of an ankle joint fracture part of a patient, and setting CT scanning parameters in the acquisition process; importing the CT image data into medical image processing software for three-dimensional reconstruction to obtain an original three-dimensional fracture model; performing measurement and virtual reduction of a fracture block on the original three-dimensional fracture model to obtain a three-dimensional fracture model after reduction; planning a surgical approach and a placement position and angle of an internal fixture based on the three-dimensional fracture model after reduction; real-time image data are collected in the operation process, registration fusion is conducted on the real-time image data and the reset three-dimensional fracture model, a visual guide image is generated, and real-time navigation is provided for operation. According to the method, the reproducible end-to-end process is formed through the steps, the process difference between different operators / hospitals is remarkably reduced, and the aims of resetting and fixing are kept consistent in the pre-operation according to the result.

The utility model relates to the technical field of die cutting equipment, and discloses a foam stamping die convenient to demould, which comprises a table plate and a demoulding mechanism, a plurality of H-shaped steels are arranged on the outer wall of the table plate, the plurality of H-shaped steels are symmetrically distributed on the outer wall of the table plate, a lifting buckle is arranged on the outer wall of each H-shaped steel, a lifting cover is arranged on the outer wall of each lifting buckle, and the lifting covers are arranged on the outer walls of the lifting buckles. And an internal fixator is arranged on the inner wall of the lifting cover, a first fastening bolt is arranged on the inner wall of the internal fixator, and a placement groove is formed in the inner wall of the internal fixator. According to the foam stamping die convenient to demold, an arc-shaped pressing plate and a pressing rod are arranged on the outer wall of a cutter, so that when the cutter works, elastic tension released by the pressing rod can push the arc-shaped pressing plate to fix the cutter, then the stability of the cutter can be guaranteed, a sliding rod motor can drive a clamping shaft to fix the cutter, and the cutting efficiency is improved. And therefore, the cutter is convenient to replace.

The utility model discloses a subgrade pavement splicing structure of subgrade engineering, which comprises a subgrade pavement, a connector and a fixer, the connector is arranged in the subgrade pavement, the fixer comprises a positioning limiting plate, the bottom of the positioning limiting plate is fixedly connected with a positioning rod, the bottom of the positioning rod fixedly penetrates into the connector, and the connector is fixedly connected with the connector. A screw hole is formed in the bottom of the positioning rod, a screw rod is in threaded connection with the interior of the screw hole, the bottom of the screw rod extends to the bottom of the screw hole to be fixedly connected with a fixing rod, and the bottom of the fixing rod penetrates to the bottom of the connector. According to the utility model, the connectors can be fixed by arranging the fixers, and then the bottom roadbed I, the bottom roadbed II and the bottom roadbed III of the roadbed pavement are connected by arranging the connectors, so that a user can conveniently connect a plane pavement during use, the user can conveniently assemble the pavement, and the normal use of the user is ensured.

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 present invention provides a detachable expansion screw and internal fixator for the anterior pelvic ring, comprising a main nail, a trapezoidal expansion piece, a trapezoidal slider, and an internal connecting rod; a cavity is provided inside the main nail, and the cavity runs through the axial direction of the main nail; the main nail comprises an integrally formed nail rod and a nail head; a slot for clamping the trapezoidal expansion piece is provided at the end of the nail rod away from the nail head; the trapezoidal slider slides in the trapezoidal expansion piece toward the nail head, causing the trapezoidal expansion piece to expand toward the outer sides of the nail rod; one end of the internal connecting rod is connected to the trapezoidal slider, and the internal connecting rod is used to penetrate into the main nail and pull the trapezoidal slider to slide. The internal fixator comprises a connecting cross bar and at least two of the above-mentioned screws, and the screws are connected by a connecting cross bar. The present invention provides a trapezoidal expansion piece at the end of the main nail away from the nail head, causing it to expand in the body, thereby improving the stability of the main nail fixed in the body.

An internal fixator device for epiphyseal block intervention, comprising: a bone plate (20) comprising a pair of retaining elements (21) having respective through-holes (23) and a structural central portion (22); a pair of fixation screws (30), each comprising a respective screw (31) for fixation to the bone portion and a screw head (32) held in the through-hole (23). The central portion (22) is configured to cause bending deformation of the bone plate (20) in epiphyseal block intervention. The screw heads (32) of the set screws (30) remain rotationally constrained with the respective retaining elements (21), and the screws (31) of the set screws (30) are configured to be separated to define an angle. The internal fixture device (10; 10 ') further comprises at least one sensor (40, 40') applied to the central portion (22) and configured to measure the bending deformation, and the sensor (40, 40 ') is further configured to wirelessly transmit data representing the bending deformation so as to calculate the defined angle of the screw (31) of the fixing screw (30).

The invention relates to the technical field of medical instruments, in particular to an intraoperative adjustable internal fixture implantation guider which comprises a guide module and an adjusting locking module, the guide module comprises a guide rod and a hinge, and the adjusting locking module comprises a knob nut and a connecting rod; the guide rod is provided with a guide hole, the hinge is provided with an adjusting locking hole, the guide rod is a main body and provides a foundation for the design of the guide hole, the hinge is connected with the adjusting locking module, the adjusting locking hole in the hinge is used for the combination of a plurality of guide rods, and the connection mode not only ensures the flexible combination of the guide rods, but also can be used for locking the guide rods after the guide rods are adjusted to proper positions. The guide rod is stably locked through the knob nut and the connecting rod so as to meet the requirements of different operation scenes, the angle and distance of the guide rod can be flexibly adjusted by rotating the connecting rod, the angle deviation can be adjusted, and the guide rod can be locked at the needed position. Therefore, the problem of angle deviation easily caused by manual implantation is solved.

The utility model relates to the technical field of internal fixators for bone setting, in particular to a rib bone setting plate which comprises a bone plate body and clamping jaws arranged on the two sides of the bone plate body, a fixed clamping jaw and the bone plate body are integrally formed, a movable clamping jaw is connected with the bone plate body through a sliding seat, and a sliding groove for the sliding seat to horizontally slide is formed in the bone plate body. An elastic locking piece used for limiting the sliding seat is further arranged in the sliding groove, the sliding groove is provided with two side walls, the elastic locking piece is elastic steel balls symmetrically arranged on the two side walls, a locking groove matched with the elastic steel balls is formed in the sliding seat, the elastic steel balls abut against the locking groove, and the elastic steel balls are arranged in the sliding groove through springs. Elastic grooves capable of containing the springs are formed in the two side walls, and positioning rings are arranged at openings of the elastic grooves and used for limiting the elastic steel balls and the springs in the elastic grooves. According to the rib bone fracture plate, the detachable movable clamping jaws are arranged on the bone plate body, so that it is guaranteed that ribs are stably clamped, and meanwhile the rib bone fracture plate is convenient to detach.

The application relates to the technical field of medical instrument testing and biomechanical testing, in particular to an orthopedic internal fixator fatigue test system based on an intelligent sensor, which comprises a test rack, a multi-degree-of-freedom actuator, a sensor array arranged on the orthopedic internal fixator and a control computer in communication connection with the sensor array; a collection module acquires multi-modal stress and strain feedback signals at an initial sampling frequency, a processing module extracts a characteristic value variation rate of stress amplitude and strain phase and compares the characteristic value variation rate with a load spectrum self-adaptive reconstruction trigger threshold value, when the threshold value is reached, the feedback signals are input into a nonlinear biomechanical compensation evolution model to solve a target multi-dimensional coupled load spectrum, otherwise, a current multi-dimensional coupled load spectrum is extracted; a control module generates a multi-axis load control instruction, and an execution module controls the multi-degree-of-freedom actuator to adjust a mechanical loading vector; the application realizes dynamic evolution testing based on a structure recession state and improves the credibility of fatigue life evaluation.

The invention discloses a three-dimensional segmented adjustable distal radius internal fixator and a using method thereof, and relates to the technical field of orthopedic internal fixing devices.The three-dimensional segmented adjustable distal radius internal fixator comprises a multi-segment adjustable bone fracture plate, and the multi-segment adjustable bone fracture plate comprises a near-end module, a middle connecting module and a distal-end module; the screw rod adjusting frame structure is arranged among the near-end module, the middle connecting module and the far-end module; the tail end of the far-end module is further provided with a hook claw structure and a positioning posture adjusting telescopic arm assembled with the multiple sections of adjustable bone fracture plates. The bone fracture plate is centered and positioned on the central axis of the radius backbone through the positioning posture-adjusting telescopic arm, the problems of radian mismatching and placement position are solved through telescopic sliding of the middle connecting module and self-adaptive angle deflection of the far-end module, stable pressurization is carried out to promote healing, and under the effect of a hook claw structure, the bone fracture plate is fixed to the middle of the radius backbone through the positioning posture-adjusting telescopic arm. And more complicated fracture types are further reinforced and covered.