9 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 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 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.

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 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.