16 results about "Joint contact" patented technology

The invention relates to the field of rehabilitation management, and discloses an orthopedic patient rehabilitation process tracking system comprising a patient data acquisition module used for acquiring joint motion parameters and three-dimensional skeleton point cloud data of an orthopedic patient; the muscle model building module is used for building a skeleton model of the orthopedic patient, defining skeleton degree-of-freedom motion of the skeleton model and building a specific skeleton-muscle model; the monitoring network construction module is used for determining a distributed flexible strain sensor and an epidermal electrode of the orthopedic patient, defining an ad hoc network protocol of the distributed flexible strain sensor and the epidermal electrode, and constructing a flexible electronic monitoring network; the monitoring network data acquisition module is used for monitoring local muscle electrical activity and mechanical stress distribution of the orthopedic patient; and the rehabilitation process tracking module is used for executing rehabilitation process tracking of the orthopedic patient after analyzing a function recovery curve of the orthopedic patient by using the joint contact force and the ligament strain energy. The evaluation accuracy of the rehabilitation process of the patient can be improved.

The utility model provides a multi-curvature ankle joint prosthesis which comprises a tibia prosthesis connected with a tibia, a talus prosthesis connected with a talus and a cushion block with one side connected with the tibia prosthesis, a joint contact surface is arranged on the other side of the cushion block, and a talus contact surface matched with the joint contact surface is arranged on one side of the talus prosthesis. The curvature of the sagittal plane Z in the talus contact face is reduced from front to back, and the instantaneous rotation center of the talus prosthesis on the joint contact face is in an arc shape. According to the multi-curvature ankle joint prosthesis, the talus contact face and the anatomical structure of the human body are high in consistency, the natural form and the motion mode of the ankle joint are accurately restored, the ankle joint prosthesis better conforms to biomechanics and kinematics in the motion process, the motion stability of the human body is improved, local friction stress of the ankle joint prosthesis is smaller, and the ankle joint prosthesis is more stable in motion. And the service life of the ankle joint prosthesis is prolonged, so that the durability of the ankle joint prosthesis is improved.

The utility model belongs to the technical field of spiral lines, and particularly discloses a spiral line with anti-loosening joint contacts, which comprises a spiral line body, one end of the spiral line body is provided with a connector, one end of each of the two connectors is provided with a connecting contact, and the outer wall of each connecting contact is provided with an anti-bending assembly. The number of the anti-bending assemblies is two, each anti-bending assembly comprises a protective shell, the protective shells are used for preventing the spiral line body from being bent, the number of the protective shells is two, one end of each protective shell is fixedly connected with an L-shaped rod, one end of each L-shaped rod is connected with a semicircular ring, and the two ends of each semicircular ring are provided with connecting plates. According to the utility model, through the arrangement of the anti-bending assembly, the bending of the spiral line is effectively prevented, the connection stability is ensured, and the connection contact is not subjected to extra stress due to the bending of the spiral line, so that the probability of occurrence of the problems of poor contact, signal interruption and the like is reduced, and the probability of breakage of the spiral line is also reduced.

The invention relates to the field of orthopedic surgery risk assessment, in particular to an orthopedic surgery risk assessment method and system. The method comprises the following steps: acquiring preoperative data and intra-operative data of an orthopedic surgery of a patient, performing data preprocessing on the preoperative data and the intra-operative data, and extracting bone microstructure spatial features in initial orthopedic surgery data by using a cascade feature extraction network; calculating an association weight of the image data and the biological signal through a cross-modal attention mechanism, and constructing a patient specific skeleton model based on finite element analysis to perform real-time scene simulation on the characteristic orthopedic surgery data; the influence of joint contact stress distribution under different osteotomy angles, a bone implant interface micro-motion threshold after implantation of an internal fixation instrument and hemodynamic changes on a bone healing microenvironment is simulated in real time, complications caused by misoperation are remarkably reduced, and the success rate of an operation is increased.

Methods and systems are provided for determining medial joint contact force. For example, methods and systems described herein may train a neural network model to determine medial joint contact force. A plurality of training data is obtained and a plurality of heel strike to toe-off time periods are extracted from the training data. A gait categorization label is assigned. A ground reaction force and joint contact forces are determined. An input training array and an output training array is provided to the neural network. The neural network is trained to output a predicted joint contact force value corresponding to a calculated joint contact force measured from force plate data, based only on insole data. The trained neural network model is stored after it has been validated.

This invention relates to the field of orthopedic surgical risk assessment, and in particular to a method and system for orthopedic surgical risk assessment. By acquiring preoperative and intraoperative data of a patient's orthopedic surgery, the method preprocesses the preoperative and intraoperative data, extracts the spatial features of bone microstructure from the initial orthopedic surgical data using a cascaded feature extraction network, calculates the correlation weights between imaging data and biological signals through a cross-modal attention mechanism, and constructs a patient-specific bone model based on finite element analysis to simulate the characteristic orthopedic surgical data in real time. The method simulates the distribution of joint contact stress at different osteotomy angles, the impact of micromotion thresholds at the bone implant interface and hemodynamic changes on the bone healing microenvironment after internal fixation device implantation, significantly reducing complications caused by improper operation and improving the surgical success rate.

The utility model relates to the field of medical blood collection relates to a novel blood collecting tube, its and base joint, base sets up on the storage box, including blood collecting tube body, the cap that buckles on blood collecting tube body, set up on the pressing subassembly of cap and set up on the self -locking subassembly of blood collecting tube body, drive the part structure on pressing subassembly can make it with self -locking subassembly joint or each other separate from each other. The utility model discloses through pressing pressing head movement, makes it drive inclined block movement and first joint contact, realizes the mutual locking between cap and blood collecting tube body after blood collection again, can effectively avoid the loosening of cap even accidental drop caused by external force factor, can avoid the impurity into blood collecting tube and pollute sample. Through pressing pressing head again, make the inclined block continue to move and third joint contact, while the inclined block promotes second joint movement and first joint contact, cap and blood collecting tube body are unlocked, can pour out the sample in the inside fast, simple operation, convenient to use.

The present invention provides a method for simulating the extrusion deformation of mortise and tenon joints based on finite element analysis, comprising the following steps: first, simplifying the three-dimensional force model of the mortise and tenon joint into a two-dimensional plane stress model; dividing the structure into beam-column extrusion deformation influence areas, through-beam extrusion deformation boundaries and other areas according to the extrusion influence range of through-beams and wooden columns; respectively cutting out the above areas in the finite element model, and dividing them using different grid densities or sizes; and setting the two-dimensional model boundary conditions and contacts according to the force mechanism of the original structure and theoretical analysis. The precise extrusion deformation curve of the contact area of ​​the mortise and tenon joint can be extracted through finite element calculation. The present invention effectively simplifies the method for simulating the extrusion deformation of the mortise and tenon joint, and reduces the number of grids in the finite element analysis by performing grid encryption at key force-bearing positions. The length of the grid unit at the contact boundary position can reach 0.1 mm, thereby improving the accuracy of the simulation of the extrusion deformation of the mortise and tenon joint.

To enable an original arrangement attitude of a movement regulation body to be maintained even if a large pressing force is exerted on the movement regulation body attached to a pipe joint cover by movement of a pipe joint.SOLUTION: An arrangement structure of a pipe joint includes: a pipe joint cover C1 which comprises a base V1 and a lid body L1 and houses a pipe joint K1 in an arrangement structure 10 at the interior; and a movement regulation body A1 which is attached to the pipe joint cover C1 and becomes an obstacle in a movement destination of the pipe joint K1 which is moved due to linear expansion of a fluid pipe P1 in a longitudinal direction caused by heat to regulate the movement. The movement regulation body A1 comprises: a pipe joint contact surface 48 with which the pipe joint K1 is placed in contact by the movement; and a pressing reaction force receiving part which is formed at a surface opposite to the pipe joint contact surface 48 to cause a pressing force applied to the movement regulation body K1 through contact by the pipe joint A1 to act on a pressing force support part of the pipe joint cover C0 through the movement regulation body A1 to receive a pressing reaction force in a direction opposite to the movement.SELECTED DRAWING: Figure 10

The application provides a finger partial defect repair fixed-point matching method and system. The method constructs a multi-pose three-dimensional reconstruction model based on first three-dimensional medical image data and second three-dimensional medical image data of a finger to be repaired, and obtains a three-dimensional template model of a complete finger. Then, the three-dimensional template model is mapped to a first pose and at least one second pose to obtain a template multi-pose model. Then, a fixed-point matching relationship and corresponding deformation parameters between residual phalanges and corresponding anatomical points on the three-dimensional template model are determined. Finally, based on the fixed-point matching relationship and the deformation parameters, a fixed-point matching result for repairing a finger partial defect area is generated to ensure that the fixed-point matching result and the residual phalanges not only match well in each static pose, but also maintain stable joint contact relationship and soft tissue strain state in the continuous process of postoperative flexion and extension movement.

The invention provides a method for predicting the rotation center position of a hip joint in hip replacement, and the method comprises the steps: carrying out the integrated processing of an initial personalized three-dimensional skeleton model, which is determined according to a CT image of a patient, with each prosthesis model, and determining at least one postoperative simulation skeleton model; for each postoperative simulation skeleton model, skeleton replacement processing is carried out on the general bone muscle model, and at least one initial postoperative simulation bone muscle model is obtained; performing correction processing by using the EOS image to obtain at least one candidate postoperative simulation bone muscle model; according to the target motion track data, the target plantar pressure data and each candidate postoperative simulation bone muscle model, hip joint contact force under each candidate postoperative simulation bone muscle model is obtained, and the optimal position of the hip joint rotation center in hip replacement is predicted. By means of the scheme, the problems that in a traditional method, the rotation center position is not accurate, and contact force is too large can be effectively solved.

The invention discloses a construction method and application of a calculation model of varus knee joint contact stress, and the method comprises the steps: setting a femur and femur cartilage of a knee joint as first elastomers, setting a tibia and tibia cartilage as second elastomers, respectively setting a high-elasticity-modulus layer and a low-elasticity-modulus layer, applying a normal force to the high-elasticity-modulus layer and introducing a modification coefficient, obtaining the corrected contact radius and peak pressure, and constructing a dynamic equilibrium equation of the introversion knee joint; adding meniscus parameters, and constructing a peak contact stress model of double contact areas of the introversion knee joint; constructing a strain function for the low-elastic-modulus layer by adopting a Yeoh model to obtain the elastic modulus of the meniscus material during large strain; inputting the image data, the introversion angle and the load parameters of the subject into the mathematical model of the peak contact stress of the knee joint, comparing the obtained analytical solution with the numerical solution of the finite element model, and if the analytical solution is within a preset range, proving that the mathematical model is correct, and applying the mathematical model to the optimization application of the artificial meniscus and the knee joint prosthesis.

The utility model relates to the technical field of three -way joint, specifically disclose a wear -resisting three -way joint, including three -way joint, two horizontal joint's bottom is provided with wear -resisting structure, wear -resisting structure includes integrated mounting panel and wear plate, is set up on wear plate multiple wear -resisting recess, integrated on wear plate multiple wear -resisting convex, multiple wear -resisting recess and multiple wear -resisting convex interval arrangement, through setting wear -resisting structure in the vertical joint's right below, can reduce the impact of water flow buffering and the long -term wear and tear of water flow to the inner wall bottom end of horizontal joint, specifically when water flow flows down from the vertical joint, water flow and multiple wear -resisting recess and multiple wear -resisting convex on wear plate contact, and then through multiple wear -resisting recess and multiple wear -resisting convex can disperse water flow, slow down the impact of water flow, avoid the water that flows down from the vertical joint directly with the inner bottom end of horizontal joint contact to realize the effect of wear -resisting protection to three -way joint.

This invention discloses an IMU-based method and system for predicting lower limb joint dynamic parameters. The method includes the following steps: acquiring kinematic data of key rigid bodies in the lower limb kinetic chain using four inertial measurement units (IMUs) configured at specific locations on the lower limb; preprocessing the kinematic data to construct a temporal input feature tensor; inputting the temporal input feature tensor into a pre-trained deep learning prediction model to obtain a fused feature vector; the deep learning prediction model performing split decoding on the fused feature vector, mapping it to different task branches; the multi-task branches simultaneously outputting the joint contact forces and torques of the hip, knee, and ankle joints; and the system integrating the aforementioned IMU-based method for predicting lower limb joint dynamic parameters. This invention achieves real-time, high-precision synchronous prediction of contact forces and torques of the hip, knee, and ankle joints using only IMU sensors, and is suitable for rehabilitation assessment and motion monitoring.

The present invention provides an automatic registration and positioning method for implants based on dual-plane X-ray tracking, including construction of a virtual dual-plane X-ray system, implant edge extraction and weighted expansion in X-ray images, rapid projection and edge extraction of implant geometric models, and search for optimal matching positions. According to a locator, the relative positions of the image planes of two X-ray machines are determined, thereby establishing a virtual dual-plane X-ray system in a computer system; the weighted expansion edges extracted from the X-ray images and the edges of the implant model projection are taken by two X-ray machines, and the matching degree of the implant model at any spatial position is calculated. The spatial position of the implant when the matching degree is the highest can be quickly obtained through a simulated annealing algorithm. This method can realize automatic tracking of the implant's spatial position in the body based on the motion images continuously obtained by the two X-ray machines, and use this as a reference for implant kinematic research and joint contact analysis, greatly reducing the manpower and time overhead of manual registration.

The utility model relates to the technical field of pipe joints, and discloses a single-button detachable quick connector, which comprises a connector body and a single-button lock catch, and is characterized in that the connector body comprises a sleeving part and an inserting part, the inserting part is used for being fixedly connected with one end of a pipe in a pipeline, and the other end of the pipe in the pipeline is fixedly connected with the single-button lock catch. The sleeving part is used for being fixedly connected with a male connector in an inserted mode, an installation inserting opening is formed in the sleeving part, the single-button lock catch is detachably fixed to the installation inserting opening, all the anti-skid ribs are fixed to the side, facing the inserting part, of the single-button lock catch, and when the lock catch makes contact with the male connector, the larger the contact force is, the larger the contact force is, due to the effect of the anti-skid ribs, the larger the contact force is. In a general state, the lock catch is pressed, the lock catch is opened, and the unlocking male connector can be pulled out.