72 results about "Knee joint replacement operation" patented technology

The invention discloses an adjustable positioning module, a knee joint replacement positioning platform and a knee joint replacement positioning method.The adjustable positioning module comprises a positioning table; the first supporting plate is used for supporting the upper body of the human body; the second supporting plate is used for supporting the legs of the human body, and the second supporting plate is in an inverted V shape; the third supporting plate is used for supporting the feet of the human body; the first supporting plate is obliquely and slidably arranged on the positioning table, a first driving mechanism used for driving the first supporting plate to obliquely and linearly slide relative to the positioning table is arranged on the positioning table, the second supporting plate is horizontally and linearly slidably connected to the positioning table, and the third supporting plate is slidably arranged on the positioning table. The positioning table is provided with a second driving mechanism used for driving the third supporting plate to vertically and horizontally slide linearly relative to the positioning table. The knee joint osteotomy device can be suitable for patients with different leg lengths, knee joint replacement surgery is facilitated, and the convenience and accuracy of osteotomy operation can be improved.

A method for optimizing a knee arthroplasty surgical procedure includes receiving pre-operative data comprising (i) anatomical measurements of the patient, (ii) soft tissue measurements of the patient's anatomy, and (iii) implant parameters identifying an implant to be used in the knee arthroplasty surgical procedure. An equation set is selected from a plurality of pre-generated equation sets based on the pre-operative data. During the knee arthroplasty surgical procedure, patient-specific kinetic and kinematic response values are generated and displayed using an optimization process. The optimization process includes collecting intraoperative data from one or more surgical tools of a computer-assisted surgical system, and using the intraoperative data and the pre-operative data to solve the equation set, thereby yielding the patient-specific kinetic and kinematic response values. A visualization is then provided of the patient-specific kinetic and kinematic response values on the displays.

The invention relates to the technical field of balance systems, in particular to a load and gap balance system in a knee joint replacement operation. Mainly aiming at the problems that a doctor realizes symmetrical gap balance and ligament stress by virtue of a manual technology and subjective evaluation, an unsatisfactory result can be caused, and complications, such as instability, limited movement range and premature wear of an artificial knee joint prosthesis, are possibly caused, the following technical scheme is provided: the artificial knee joint comprises a knee joint, the knee joint comprises a femur and a tibia, and a medial collateral ligament and an lateral collateral ligament are connected between the femur and the tibia; the first osteotomy guider is used for cutting off the thighbone, the thighbone part of the first osteotomy guider is cut off to form a far-end osteotomy plane, and a thighbone prosthesis is installed at the position of the far-end osteotomy plane. According to the invention, the gap can be accurately measured, the ligament can be accurately tensioned, personalized alignment is realized, prosthesis selection is optimized, and the surgical effect of knee joint replacement, the satisfaction degree of a patient and the long-term durability of the prosthesis are effectively improved.

A modular instrument system for use in a knee joint replacement operation includes a tibial component, a first femoral component, a second femoral component and at least one spacer element. The different components of the modular instrument system are releasably connectable to one another to form different instrument configurations.

The utility model relates to the technical field of medical instruments, in particular to a multi-scene use bone hammer which comprises a handle rod, a bone hammer column head arranged at one end of the handle rod, a first bone hammer head arranged at one end of the bone hammer column head and a second bone hammer head arranged at the other end of the bone hammer column head. And the second bone hammer head is a plastic bone hammer head. In a knee joint replacement operation, an original bone surface needs to be cut off, a bone hammer and a bone knife are used in cooperation, at the moment, a first bone hammer head (namely a metal bone hammer head) needs to be used for knocking the tail of the bone knife, bone cutting is achieved, and after the bone is cut off, a metal joint is fixed to the surface of the joint after the bone is cut off; the second bone hammer head (namely the plastic bone hammer head) is used for knocking a metal joint, fixation and replacement of the joint are achieved, the applicability of the bone hammer is improved, and the multi-scene use requirements of the bone hammer are met.

The present application provides a surgical upper computer for knee replacement surgery and a knee replacement surgery system, relating to the field of surgical equipment. A surgical upper computer includes a processor; and a memory storing a plurality of computer programs, which, when executed by the processor respectively, cause the processor to execute multiple operation modes of the surgical upper computer. The multiple operation modes include: presenting information to be input to a user, where the information to be input includes a dynamic change range of a joint angle, and a relationship between the joint angle and a thrust applied between the femur and the tibia or a relationship between a formed gap; applying a thrust during a dynamic adjustment of the joint angle, and collecting corresponding relationship data between the thrust and the gap; and visually presenting the corresponding relationship data. According to an embodiment of the present application, the forces and gaps of soft tissues in knee replacement surgery can be collected and presented in a reasonable manner.

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.

A surgical instrument for use in a knee joint replacement operation having a first fastening device, a second fastening device, a guiding device connected at one end to the first fastening device and at the other end to the second fastening device and by which the second fastening device is pivotably movable in a manner guided relative to the first fastening device in a sagittal guiding plane, and an alignment rod configured for alignment with respect to an anterior edge of a tibia. The alignment rod is releasably connected to the second fastening device in a rigid manner.

The invention aims to provide an adjustable knee joint flexion maintaining device for knee joint replacement surgery, and relates to the technical field of medical instruments. A thigh supporter and a shank supporter are arranged on a supporting plate; during use, the thighs and the shanks of a patient are placed on the thigh plates and the shank plates of the thigh supporting device and the shank supporting device, the thigh plates are supported below the thighs, the shank plates are supported below the shanks, and the peripheries of knee joints are fully exposed; by rotating the thigh screw rod and the shank screw rod, the angles of the thigh plate and the shank plate are adjusted, and the knee joint buckling angle is adjusted; the distance between the thigh supporter and the shank supporter is adjusted through sliding of the thigh supporter; the height of the lower portion of the shank plate is adjusted through stretching of the telescopic rod, the bending angle of the knee joint and the height of the shank are further adjusted in cooperation with rotation of the shank plate, and the position of the lower limb can be better adjusted according to actual knee joint operation conditions.

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.

The invention discloses a knee joint replacement surgery navigation system. Relates to the technical field of medical treatment, and comprises a pre-operation processing unit used for determining a gradient pore model corresponding to a target object according to a knee joint medical image of the target object; the intra-operation processing unit is used for determining target pose information of an operation tool based on the multi-modal acquisition data in the implantation process of the personalized knee joint prosthesis, and performing reconstruction processing on the knee joint three-dimensional model of the target object based on the target pose information to obtain a processed knee joint three-dimensional model; and the postoperative processing unit is used for monitoring the knee joint state of the target object based on the implantable sensor after the personalized knee joint prosthesis is implanted, and executing a corresponding target early warning strategy according to abnormal information of the knee joint state under the condition that the knee joint state is detected to be abnormal. According to the invention, the problem of low positioning accuracy of a knee joint replacement surgery navigation system in the prior art is solved.

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.

The invention relates to the field of computer technology application, and provides a postoperative lower limb key point detection method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining a postoperative lower limb image needing to be detected at present and a preoperative lower limb image corresponding to the postoperative lower limb image; the post-operation lower limb image is an image shot after a knee joint replacement operation is carried out on the lower limb, and the pre-operation lower limb image is associated with the corresponding pre-operation lower limb key point information; based on the postoperative lower limb image, key points of a prosthesis area in the postoperative lower limb image are detected, and prosthesis area key point information is obtained; based on the preoperative lower limb image and the key point information of the prosthesis area, key points of a non-prosthesis area in the postoperative lower limb image are detected, and key point information of the non-prosthesis area is obtained. According to the method provided by the embodiment of the invention, accurate detection of the key points of the post-operation lower limb X-ray image can be realized without additionally establishing a deep learning model, and the model deployment efficiency of a lower limb skeleton intelligent measurement and calculation related system can be improved.

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).

The present invention provides a self-locking tibial prosthesis, comprising: a main body, a bendable claw is arranged on the edge of the lower surface, the claws are evenly distributed, an array gap is arranged between adjacent claws, a first annular protrusion is arranged at the center of the lower surface, a first protruding platform is arranged on the top of the first annular protrusion, an annular cable is placed on the first protruding platform, and traction cables are evenly arranged around the annular cable, and the traction cables are connected to the claws; a gasket, a second annular protrusion is arranged on the upper surface, and a second protruding platform is arranged on the top of the second annular protrusion. Applying the technical solution of the present invention, in knee replacement surgery, the gasket abuts against the tibia and moves upward, the diameter of the compressed annular cable shrinks, the traction claw is tightened, and the tibia is clamped to achieve a stable installation.

A TRIAL PATELLA COMPONENT KIT 5 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 10 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 15 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. 20 25 20 25 66 10 A pr 2 02 5 A B S T R A C T 2 0 2 5 2 0 2 5 6 6 1 0 A p r 2 0 2 5 A T R I A L P A T E L L A C O M P O N E N T K I T

The present invention provides a distal plug prosthesis for blocking the distal femoral medullary cavity opening, comprising a prosthesis column and an annular skirt, wherein the prosthesis column has a head end and a tail end; the head end is tapered and suitable for drilling; a cover sheet is formed on the edges around the tail end, and the plane where the cover sheet is located forms an angle of 30-40° with the central axis of the prosthesis column; the annular skirt is at least two circles, formed on the outer cylindrical surface of the middle part of the prosthesis column. The distal plug prosthesis for blocking the distal femoral medullary cavity opening provided by the present invention fills the gap in the industry. During knee replacement surgery, when intramedullary positioning is used at the femoral end, after completing the positioning or before installing the prosthesis, a distal plug prosthesis of suitable specifications is selected to be directly plugged into the distal femoral medullary cavity opening, saving operation time, and there is no need to grind the patient's osteotomy block during the operation to re-form the bone plug. Moreover, the distal plug prosthesis is tightly sealed after being plugged in, and is not easy to fall off, be plugged too deep or fall into the medullary cavity, and can effectively block the distal femoral medullary cavity opening.

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 invention discloses a knee joint point cloud registration method, device and equipment and a medium, and relates to the technical field of medical image processing, and the method can be used for carrying out registration on knee joint point clouds which are obtained by CT (Computed Tomography) image reconstruction and are acquired by point cloud acquisition equipment and have different modalities, and is used for guiding a knee joint replacement operation. According to the method, the registration between the point cloud reconstructed by the CT scanning before the knee replacement operation and the point cloud acquired by the point cloud acquisition equipment during the operation can be effectively realized, the special shape information of the point cloud is effectively processed, the difficulty of low overlapping rate of the point cloud is overcome, and accurate information is provided for augmented reality operation navigation.

The present invention discloses a control method for improving the follow-up stability of the end of a robotic arm, including: the robotic arm receives the end target posture P inital ; based on the current posture of the robotic arm, filter the end target posture P inital to obtain the posture P filter after noise elimination; correct the posture P filter to obtain the corrected posture P correct ; transform the posture P correct to the end coordinate system of the robotic arm to obtain the final posture P final ; control the robotic arm to move to the final posture P final . When the robotic arm of the knee replacement surgical robot system performs bone cutting, the present invention can track the cutting plane in real time; at the same time, it can eliminate the jitter and possible errors during the bone cutting tracking of the robotic arm, and improve the bone cutting accuracy and user experience.

1. The name of the product of this design: directional sensor. 2. Purpose of the product with this design: The product with this design is an auxiliary tool for knee replacement surgery, which is used to convey surgical information to doctors and remind doctors of the completion effect of the surgery. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

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.

The invention discloses a lower limb stable supporting device special for knee replacement surgery. The lower limb stable supporting device comprises a base, a lifting leg support mechanism, a bottom support, a cross rod and a foot support assembly. A translation assembly is mounted on one side of the top surface of the base, and a vertical rod is mounted on the other side of the top surface of the base; the lifting leg support mechanism is mounted at the moving end of the translation assembly; the bottom support is vertically connected to the vertical rod in a sliding mode, a first driving assembly is installed on the bottom support, and the first driving assembly is used for adjusting the height of the bottom support; the transverse rod is transversely connected to the bottom support in a sliding mode, and a second driving assembly is installed on the transverse rod and used for adjusting the horizontal position of the transverse rod; the foot support assembly is installed on the transverse rod through the dip angle adjusting assembly, and a temperature control assembly is installed in the foot support assembly. Adjustment of the inclination angle, the height and the horizontal position of the foot support and adjustment of the position of the leg support can be achieved, rapid and accurate adjustment of the lower limb supporting position and angle is achieved, and stability and safety of the lower limbs of a patient in the knee joint replacement operation are guaranteed.

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.