28 results about "Knee joint replacement operation" patented technology

The present application relates to the technical field of medical image processing, and provides a knee femur and tibia segmentation method based on region growing, comprising the following steps: S1, acquiring knee medical images; S2, selecting a growth seed point; S3, coarsely segmenting the knee medical images to obtain knee stem data; S4, finely segmenting the knee medical images to obtain knee connection data; S5, fusing the knee stem data and the knee connection data to obtain knee femur and tibia image data with complete contours; S6, coarsely filling the knee femur and tibia image data to obtain knee femur and tibia image data after coarse filling; and S7, iteratively filling holes in the knee femur and tibia image data by using a three-dimensional sliding window, so as to obtain image data that is consistent with the surrounding data in shape, position and completeness and smoothness. The present application solves the problems of slow segmentation speed, unstable segmentation effect, incomplete segmentation and adhesion in preoperative planning of knee replacement surgery.

The invention discloses a deformation error compensation method for a dilator in total knee arthroplasty, and aims to solve the problem of measurement errors caused by deformation of a cantilever structure. The method comprises the following steps of: firstly, performing parameterized dynamic modeling and simulation on an external execution mechanism through finite element software, calibrating a model by combining actual measurement data of a physical prototype, and constructing a high-precision deformation data set; then, the data set is used for training a BP neural network optimized through a genetic algorithm, and the network takes the applied force and the displacement measurement value which are collected in real time as input and outputs a real displacement value after compensation. And finally deploying the trained lightweight network model in an embedded processing unit of the spreader to realize real-time error compensation. According to the method, complex nonlinear deformation errors are effectively compensated, the average absolute error is reduced to 0.056 mm, the real-time response delay is smaller than or equal to 5 ms, the method is remarkably superior to a traditional linear method, more accurate gap measurement is provided for an operation, and the method can be further used for forming closed-loop control and improving the intellectualization and precision of the operation.

A kit for use in knee replacement surgery includes a trial patella component and a patella implant component. The trial patella component includes a backing plate having a backing surface for positioning against a patient's patella, and at least one sensor which can generate a signal corresponding to the compressive load applied to the trial patella component, and a first bearing plate which can be fitted to the backing plate and which, when fitted to the backing plate, provides a bearing surface for articulation against a bearing surface on the patient's femur. The patella implant component has a backing surface for fixation to a patient's patella instead of the backing surface of the trial patella component, and a bearing surface for articulation against a femoral bearing surface. The thickness of the patella implant component is greater than the thickness of the trial patella component when the first bearing plate is fitted to the backing plate, the difference between the said thicknesses being at least about 1 mm.

A knee alignment measurement tool for use during a total knee replacement surgery may include the following main components: a sensor assembly, a display unit configured to power up, operatively control the individual sensors of the sensor assembly, and display the readings therefrom, and a flexible gooseneck cable operatively connecting the sensor assembly to the display unit. The sensor assembly may include a rigid base supporting a circuit board, a left sensor and a right sensor positioned adjacent to the left center, and a cover sealed to the rigid base to enclose the left sensor and the right sensor, wherein the cover does not abut the rigid base during the compression of the sensor assembly.

Embodiments of the present application are applicable to the technical field of computer-aided medical treatment and surgical planning, and provide a single-condyle mobile platform surgical planning method and a computer device. The method comprises: determining a plurality of prostheses to be planned, the prostheses comprising femoral prostheses and tibial prostheses, and the femoral prostheses all being spherical prostheses; placing the femoral prostheses with the distal end point of a pre-constructed femur three-dimensional model as the center, and adjusting the femoral prostheses to target femur positions; calculating femur section coverage rates of the femoral prostheses at the target femur positions; determining a target femoral prosthesis from the plurality of femoral prostheses according to the femur section coverage rates; determining a target tibial prosthesis from the plurality of tibial prostheses, and performing preoperative planning of a single-condyle mobile platform knee joint replacement surgery based on the target tibial prosthesis and the target femoral prosthesis. By using the above method, preoperative prosthesis planning can be performed for single-condyle knee joint surgery of a mobile platform.

Surgical instrument (1) for use in knee replacement surgery, comprising a first fastening device (100) which is designed for detachable fastening to a reference component (600) attached to a distal femur (F), a second fastening device (200), which is spaced distally from the first fastening device (100) and is designed for detachable fastening to a tibial cutting block (700) for cutting on a proximal tibia (T), a circular arc guide (300) which is connected at one end to the first fastening device (100) and at the other end to the second fastening device (200) and by means of which the second fastening device (200) is guided linearly movable relative to the first fastening device (100) in a sagittal guide plane (E) along a longitudinally extended circular arc guide track (C), a first linear guide (400) by means of which the circular arc guide (300) is connected at one end to the first fastening device (100) and is guided linearly movable relative to the same in the guide plane (E) along an anteroposteriorly longitudinally extended first guide track (L1), and a second linear guide (500), by means of which the second fastening device (200) is connected at the other end to the circular arc guide (300) and is guided linearly movable relative to the same in the guide plane (E) along an anteroposteriorly longitudinally extended second guide track (L2).

This invention discloses an extramedullary tibial osteotomy device for knee replacement surgery, belonging to the field of medical device technology. The device includes a main connecting rod, with an ankle fixation module below it. The ankle fixation module includes an ankle connecting seat, and an angle adjustment module for adjusting varus / valgus and anteversion / anteroversion angles is located behind the ankle connecting seat. The lower end of the main connecting rod is fixed to the angle adjustment module. Above the main connecting rod are a tibial measurement module and a tibial osteotomy module. An upper navigation module and a lower navigation module are respectively located at the upper and lower ends of the main connecting rod. Both the upper and lower navigation modules contain remote sensing modules for acquiring the tibial varus / valgus and anteversion / anteroversion angles. This invention's extramedullary tibial osteotomy device for knee replacement surgery is simple to operate, has a short operation time, and is inexpensive.

The present apparatus is a tool that holds and positions the tibial insert to improve the process of inserting the insert during a knee replacement operation. The apparatus comprises an arcuate convex shape that receives and holds the insert in place. The apparatus can be attached to a handle to provide greater ease of use, more reliable handling, and easier placement. The apparatus is made to have a pressure fit on the insert to firmly hold it in place, while still allowing it to be pulled off after the insert has been placed.

The embodiment of the invention is suitable for the technical field of computer-aided medical technology and surgical robots, and provides a movable platform single-condyle surgical robot system, equipment and a computer program product, the system comprises a preoperative planning module, which is used for determining the implantation position of a surgical tool combination and a prosthesis; the intra-operative navigation module is used for performing joint gap balance evaluation based on the implantation position and determining the model of a first drilling tool to be used according to a joint gap balance evaluation result; and the intra-operation execution module is used for controlling the mechanical arm to operate each operation tool in the operation tool combination to execute each step of the movable platform unicompartmental knee replacement operation. By the adoption of the system, the type of the drilling tool can be directly determined according to the joint gap balance evaluation result, drilling tools of multiple types do not need to be evaluated in sequence, operation efficiency is improved, and the influence on a patient in the process of evaluating the type of the drilling tool is relieved.

Systems and techniques can be provided to generate sensorized insights into the characteristics of a knee joint space during a knee replacement procedure. In some implementations, a sensor support body carrying one or more sensors can be used to measure and inform the clinician of the varus / valgus angles of the tibia and femur, allowing the clinician to adjust the surgical procedure to accommodate the measured angles. The clinician may simulate changes to the load balance across the knee joint in response to potential dimensional changes to the knee joint prior to actually surgically implementing the changes.

This application relates to a simulation training method for total knee arthroplasty prosthesis positioning and gap balancing, belonging to the field of simulation training technology. To provide a standardized and repeatable workflow for individualized planning of total knee arthroplasty surgery, this application provides a simulation training method for total knee arthroplasty prosthesis positioning and gap balancing. This method includes determining the amount of osteotomy on the posteromedial femoral condyle based on the thickness of the femoral prosthesis's posterior condyle; determining the rotational alignment parameters of the femoral prosthesis based on a femoral trochlea model to obtain a patellar trajectory that meets the requirements; determining the placement of the tibial prosthesis on the tibia with the knee joint model in a flexed state; and determining the placement of the femoral prosthesis on the femur with the knee joint model in an extended state. This method enables individualized planning of total knee arthroplasty surgery, precise prosthesis positioning, flexion-extension gap balancing, and standardized training of the surgical procedure, improving surgical accuracy and postoperative outcomes.

This invention relates to the field of medical device technology, providing a leg fixation bracket, fixation method, and medical device for knee replacement surgery. The bracket includes a clamping unit and a universal adjustment unit. The universal adjustment unit includes a first ball-head base fixed to the clamping unit, a second ball-head base for connecting a Kirschner wire guide, at least one adjusting rod connecting the two ball-head bases, and a locking mechanism for simultaneously locking the relative positions of the ball-head bases and the adjusting rod. The fixation method includes: fixing the clamping unit to the operating table side rail; releasing the locking mechanism and adjusting the posture to align the Kirschner wire guide with a predetermined insertion point. This invention achieves simultaneous multi-point locking through a single locking mechanism, making operation simple and locking reliable; the clamping unit can clamp bidirectionally to adapt to different operating table side rails; the overall purely mechanical structure requires no electrical components, ensuring high safety and effectively improving the stability and efficiency of knee replacement surgery.

A system of patient-matched and surgeon-specific single use surgical instruments designed for five different applications for knee replacement surgeries; primary total knee replacement, custom-made total knee replacement, revision total knee replacement, hinged total knee replacement and partial knee replacement. The system has patient-matched & surgeon-specific instruments are designed & prepared for each case based on patient's need and surgeon's demand. The system contains patient-matched set of blocks and guides, “On-Demand” surgeon-specific Instruments sets, conventional instruments sets, surgical planning software, 3D printing Software, 3D printers and sterilization unit. All the system components are manufactured by using 3D printing technologies.

The embodiment of the invention is suitable for the technical field of computer-aided medical treatment and surgical planning, and provides a single-condylar movement platform surgical planning method and computer equipment, the method comprises the following steps: determining a plurality of to-be-planned prostheses, the prostheses comprise thighbone prostheses and tibia prostheses, and the thighbone prostheses are spherical prostheses; placing the thighbone prosthesis by taking a thighbone far end point in a pre-constructed thighbone three-dimensional model as a circle center, and adjusting the thighbone prosthesis to a thighbone target position; calculating a thighbone section coverage rate of the thighbone prosthesis at the thighbone target position; a target femoral prosthesis is determined from the multiple femoral prostheses according to the femoral section coverage rate; and determining a target tibial prosthesis from the plurality of tibial prostheses, and carrying out preoperative planning of a unicompartmental knee joint replacement operation based on the target tibial prosthesis and the target femoral prosthesis. By adopting the method, preoperative prosthesis planning can be carried out aiming at the unicompartmental knee joint operation of the movable platform.

1. Name of the product in this design: Graphical User Interface for Orthopedic Surgical Navigation and Control of Electronic Devices. 2. Intended use of this design: for use in an electronic device. 3. The key design features of this product are its graphical user interface. 4. The image or photograph that best illustrates the design's key points: the front view. 5. Application of the graphical user interface: for navigation control and information display in robot-assisted orthopedic surgery. 6. Human-computer interaction method of graphical user interface: On the surgery type selection page shown in the main view, select the "Total Knee Replacement Surgery" card to enter the change state diagram 1. Select the item to open the preview page of the knee joint scheme shown in Figure 2, which represents the change state. Click "Navigation" in Change State Diagram 2 to enter Change State Diagram 3. Click "Next" to proceed to the changed state diagram (Figure 4). Click "Finish" to enter the changed state diagram (Figure 5). Click the right button next to "Navigation Steps" to enter the changed state diagram 6. Click "Verify" to enter the changed state (Figure 7). Click the right-hand button next to "Joint Registration" to enter the changed state (Figure 8). Click "Gap" to enter the changing state (Figure 9). Click "Full Process" to enter the change status diagram (Figure 10). Click the right button next to "Intraoperative Assessment" to enter the changed state (Figure 11). Click "OK" to enter the changed state (Figure 12). Click the button with "A" at the bottom to enter the changed state (Figure 13). Click "Apply" to enter the changed state (Figure 14). Click the right button next to "Osteotomy Navigation" to enter the changed state (Figure 15). The gray-coated area represents the content image.

A method and apparatus for joint balance adjustment for joint replacement procedures is disclosed. An example of a knee balance adjustment fixture may include a tibial positioning guide and / or at least one balance adjustment assembly configured to be mounted on a tibial reference in a generally medial-lateral orientation at a generally anterior position relative to the knee. The balance adjustment assembly may include a vertical guide configured to be releasably mounted on the tibial positioning guide in a generally downward-upward orientation, at least one posteriorly extending paddle selectively movable vertically along the vertical guide, the paddle configured to selectively engage with the distal femur and / or proximal tibia, and / or at least one pin guide selectively movable vertically along the vertical guide, the at least one pin guide including at least one opening configured to receive at least one of a drill bit and a bone pin.

The application provides a knee joint replacement surgery planning method and device based on X-ray images, equipment and a storage medium. The method comprises the following steps: acquiring two orthogonal X-ray images of a knee joint; using a statistical shape model method to three-dimensionally reconstruct a three-dimensional model of a femur and a tibia of the knee joint from the two input X-ray images, and outputting key point positions; recommending a prosthesis model and a pose according to the three-dimensionally reconstructed model and the key point positions; confirming the inspection result by a doctor by using the spatial relationship constructed by the key points, and further adjusting the prosthesis pose according to needs, and finally outputting a knee joint prosthesis replacement surgery planning scheme. The method disclosed by the application uses the statistical shape model method to three-dimensionally reconstruct a two-dimensional X-ray image into a three-dimensional bone model and visualize the three-dimensional bone model, which is beneficial to the doctor to more intuitively observe the prosthesis positioning condition, so that the surgery scheme can be better outputted. Moreover, the method disclosed by the application has a relatively low cost and can cover more people.

This application relates to a demonstration support frame for prosthetic bone manipulation in knee replacement surgery, belonging to the technical field of educational or demonstration equipment. The support frame includes a base, on which are respectively provided a fixed column and a sliding column. The lower end of the fixed column is fixed to the base, and the lower end of the sliding column is slidably disposed on the base and can reciprocate toward the fixed column. A first clamping member for holding a femoral or tibial model is provided on the fixed column. One end of the first clamping member is rotatably connected to the fixed column, and a first locking member is provided between them. The other end of the first clamping member faces the sliding column. A second clamping member for holding a femoral or tibial model is provided on the fixed column. One end of the second clamping member is rotatably connected to the sliding column, and a second locking member is provided between them. The other end of the second clamping member faces the fixed column. The support frame of this application is very convenient to use and has good adjustability.

The invention relates to the technical field of general pre-osteotomy and evaluation scheme design in knee joints, in particular to a general pre-osteotomy and evaluation method and system in knee joints. The method comprises: planning a prosthesis position in a navigation system; based on the pre-osteotomy retention amount, the osteotomy surface is shifted, and pre-osteotomy is carried out; universal test molds matched with prostheses of various brands and sizes are installed; measuring the knee joint gap state after the test mold is installed; on the basis of the measurement gap state, the final osteotomy surface of the prosthesis is adjusted by identifying the difference between the test mold and the real prosthesis and performing quantitative correction; and finally, completing osteotomy according to the adjusted osteotomy surface. According to the method, multi-brand prostheses are covered by a limited universal test model through parametric modeling, quantitative measurement and intelligent compensation correction of gaps are achieved through a navigation system, the problems that an existing pre-osteotomy technology depends on a specific test model, evaluation is subjective and adjustment is difficult are solved, and the accuracy, universality and efficiency of knee joint replacement surgery are remarkably improved.

The application relates to the field of computer technology, and provides a postoperative lower limb key point detection method and device, electronic equipment and a storage medium, which comprise the following steps: acquiring a postoperative lower limb image to be detected currently and a preoperative lower limb image corresponding to the postoperative lower limb image; the postoperative lower limb image is an image taken after a knee replacement surgery on a lower limb; the preoperative lower limb image is associated with corresponding preoperative lower limb key point information; based on the postoperative lower limb image, key points in a prosthesis region of the postoperative lower limb image are detected to obtain prosthesis region key point information; based on the preoperative lower limb image and the prosthesis region key point information, key points in a non-prosthesis region of the postoperative lower limb image are detected to obtain non-prosthesis region key point information. The method provided in the embodiment of the application can realize accurate detection of postoperative lower limb X-ray image key points without establishing an additional deep learning model, and can improve the model deployment efficiency of a lower limb skeleton intelligent measurement related system.

There is provided instruments for use during knee replacement surgery. Amongst other instruments, there is provided a clamp (100) for use in knee replacement surgery, the clamp (100) being operable to engage with a femoral sizing spoon (60) and a tibial resection guide (70) so as to enable positioning of the tibial resection guide (70) relative to a tibia (3) of a patient, the clamp (100) comprising an adjustment means configured to enable a thickness of a locking element (150) between a lower surface (154) and an upper surface (152) to be varied.

The invention relates to the technical field of medical treatment, in particular to an intraoperative solution mode dynamic planning method and system for partial knee arthroplasty. The method comprises the following steps: acquiring medical image data of a knee joint of a patient, and performing bone surface three-dimensional reconstruction and initial prosthesis planning; during the operation, the skeleton anatomy is mapped to the virtual three-dimensional model through the registration process; applying distraction force during flexion and extension of the knee joint, and calculating a contact point track, a gap and a dynamic angle between the thighbone prosthesis and the tibia prosthesis in real time; and according to comparison between the parameters and preset safety parameters, generating a surgical planning adjustment suggestion. Through dynamic real-time evaluation and intelligent adjustment, the defect that a traditional operation depends on static planning and doctor experience is overcome, the operation precision, repeatability and safety are improved, the method is suitable for robot-assisted partial knee joint replacement, postoperative complications can be effectively reduced, and patient prognosis can be improved.

The application discloses a knee replacement surgery navigation system. It is related to the medical technology field, and the system comprises: a preoperative processing unit for determining the gradient pore model corresponding to the target object according to the knee medical image of the target object; an intraoperative processing unit for determining the target pose information of the surgical tool based on the multi-modal acquisition data during the implantation process of the personalized knee prosthesis, and reconstructing the three-dimensional model of the knee of the target object based on the target pose information to obtain the processed three-dimensional model of the knee; a postoperative processing unit for monitoring the knee state of the target object based on the implantable sensor after the implantation of the personalized knee prosthesis, and executing the corresponding target early warning strategy according to the abnormal information of the knee state when the knee state is detected to be abnormal. Through the application, the problem of low positioning accuracy of the knee replacement surgery navigation system in the related art is solved.

1. Name of the product in this design: Knee joint osteotomy guide plate. 2. Purpose of this design: For positioning of osteotomy during knee replacement surgery. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The application provides a kind of based on the joint bone point selection registration method and system of augmented reality, it is related to skeletal point selection registration technical field, including the three-dimensional model image obtained by three-dimensional reconstruction to joint CT image;Multiple registration points are selected on the surface of three-dimensional model image;Three-dimensional model image is displayed in augmented reality glasses, and make joint physical object and augmented reality glasses display image completely coincide;Select multiple points corresponding to multiple registration points on the three-dimensional model image in augmented reality glasses on joint physical object.The application based on the method of augmented reality, point selection registration is carried out through augmented reality glasses, avoids the error of directly selecting registration point on physical object, improves the registration accuracy between skeletal image coordinate system and physical object coordinate system, and further improves the system accuracy of knee joint replacement surgery robot;Make doctor can quickly and accurately find the registration point on the patient's skeleton, greatly improve the registration accuracy, shorten the point selection time.

The application discloses a kind of bone relative motion measurement method, joint rotation axis acquisition and positioning method, can effectively improve the effect of knee joint replacement surgery, by the present application to measure a-MSA or i-MSA before operation to determine the position of rotation axis, then the prosthesis rotation axis is installed to the position in operation, can effectively reduce the dissatisfaction rate of knee joint replacement patient.And the present application is easy to implement, suitable for large-scale promotion.

This invention provides an automated osteotomy planning method and system for unicompartmental knee arthroplasty, comprising: acquiring a first contact point between the femur and tibia on the healthy side of the knee joint, and a second contact point between the femoral prosthesis and tibial prosthesis on the surgical side of the knee joint; generating the postoperative motion trajectory of the femur and tibia based on the first and second contact points; and automatically planning the amount of osteotomy of the femur or tibia on the surgical side of the knee joint based on the motion trajectory of the femur and tibia. This invention solves the problems of traditional manual surgery relying on the surgeon's experience, affecting the surgical outcome, and currently lacking effective intraoperative planning and accurate prediction capabilities. It greatly improves the safety and efficiency of unicompartmental knee arthroplasty, while also improving the surgical outcome, and significantly enhances the intelligence, usability, and reliability of this invention.

This utility model discloses a precision measuring device for a knee replacement surgery navigation system. The device includes a first test piece and a second test piece. The first test piece includes a first body, at least four support members disposed on the first body, multiple first groove points, and a first optical array. The first end of each support member away from the first body includes a first recess for placing a first laser reflector. The second test piece includes a second body and a second optical array disposed on the second body. The second body includes multiple second groove points and at least three second recesses for placing second laser reflectors. This application, through the first and second recesses for placing the first and second laser reflectors, enables the precision measuring device to be simultaneously located by both the knee replacement surgery navigation system and the laser tracker, thereby allowing the precision measuring device to measure the accuracy of the knee replacement surgery navigation system.