43 results about "Flexion angle" patented technology

The invention belongs to the technical field of wearable exoskeletons, and particularly relates to a forearm power assisting device, a forearm power assisting method and an upper limb power assisting system. The forearm power assisting device comprises an angle transmission mechanism, an angle amplification mechanism, an elastic energy storage mechanism and a tension output mechanism; wherein the buckling angle of the front arm is transmitted through the angle transmission mechanism, and after the buckling angle is amplified through the angle amplification mechanism, the elastic energy storage mechanism is driven, so that the flexible traction cable outputs pulling force linked with the buckling angle of the front arm. The forearm power assisting device is a system based on the pure mechanical transmission and energy storage principle, forearm flexion and extension angle changes can be directly converted into self-adaptive tension linked with the forearm flexion and extension angle changes, and therefore forearm muscle fatigue in long-time fine operation can be effectively relieved without an external power source.

Provided are a biplanar image-based preoperative planning method and system for total knee arthroplasty. Based on a static biplanar lower-limb image of a knee joint of a target object in a standing position and a dynamic biplanar image of the knee joint during functional motion, as well as an imported three-dimensional model, functional parameters, morphological parameters, and a three-dimensional medial and lateral joint gap of the knee joint are calculated, and then iterative calculation is continuously carried out using a two-dimensional model and a three-dimensional dynamic model to obtain a dynamically optimized placement position, so that preoperative TKA prosthesis model selection for balanced joint space across full flexion angles can be achieved; meanwhile, TKA prosthesis position planning for correcting the mechanical axis of the knee joint under three-dimensional weight-bearing conditions is considered, thereby accurately restoring the real dynamic motion of a patient, and improving the prosthesis-patient matching degree.

The invention discloses an ultrasonic shear wave elastography-based intrameniscus tearing quantitative evaluation method and system, and relates to the technical field of computer-aided diagnosis. The method is used for solving the problem of insufficient quantification of meniscus tearing detection. The method comprises the following steps: firstly, fixing a knee joint at a preset buckling angle, exciting shear waves along an annular fiber direction and a vertical direction, and collecting ultrasonic radio-frequency signals of an affected side meniscus and an uninjured side meniscus in different load states; then, a three-dimensional anisotropic elastic atlas is constructed based on the shear wave propagation velocity field, and spatial elastic distribution characteristics of the tissue are obtained; thirdly, calculating an elastic continuity index, a spatial variation coefficient and an abnormal region morphological parameter, and quantitatively representing the continuity and local tearing characteristics of the tissue structure; and finally, inputting the multi-dimensional features into a multi-branch neural network, fusing the features through a cross-branch attention mechanism, and outputting a meniscus tearing quantitative evaluation value, thereby realizing intelligent and objective evaluation of the tearing degree, and providing a basis for clinical diagnosis and postoperative rehabilitation.

Disclosed herein is an orthopedic device and methods to aid in reducing weight or pressure on a portion of a subject's knee while maintaining stability and normal gait patterns following injury or surgery. Certain embodiments include a main shaft for use in an orthopedic device, wherein the main shaft includes a curved portion. In embodiments, the curved portion cures outwardly in the walking direction. The curvature can comprise a curvature that is consistent with the maximum knee flexion angle that is observed during the loading phase of the normal gait cycle. In embodiments, the device further comprises a handle portion and a foot, wherein the main shaft is disposed between the handle portion and the foot. Additional aspects include a method of promoting the healing or recovery in a subject following injury or surgery of the knee using any one or more of the orthopedic devices disclosed herein.

Device (100) for the kinematic alignment of a tibial cutting block, wherein the device (100) comprises a first correction device (106, 108, 111) and a second correction device (104, 108, 114), wherein the first correction device (106, 108, 111) is designed to correct a flexion angle, wherein the second correction device (104, 108, 114) is designed to correct a tibial cutting height, wherein the first correction device and the second correction device comprise a guide (108) for a rod (104) for aligning the tibial cutting block, wherein the guide (108) is rotatable for correcting the flexion angle, and wherein the rod (104) is linearly movable with respect to the guide (108) for correcting the tibial cutting height. The device comprises an instrument set and a method for setting up the device.

The invention provides a traction device for fitting a knee joint instantaneous center track, and relates to the technical field of orthopedic medical instruments, the traction device comprises a thighbone fixing ring, a tibia fixing ring, an instantaneous center fitting mechanism and an automatic traction mechanism, a plurality of first through holes are uniformly distributed in the thighbone fixing ring, and a plurality of first fastening nuts are arranged on the first through holes; a plurality of second through holes are uniformly distributed in the tibia fixing ring, and a plurality of second fastening nuts are arranged on the second through holes; a swinging connecting piece is arranged on the instantaneous center fitting mechanism, a sliding block is connected to the swinging connecting piece, the center of the sliding block fits the instantaneous center of the knee joint of the human body, and the sliding block is connected into the guide groove in a sliding mode; the automatic drafting mechanism comprises an electric push rod, the electric push rod is provided with a guide rod, the guide rod extends or shortens to adjust the drafting angle of the instantaneous center fitting mechanism, and then the buckling angle of the knee joint is adjusted. The device has the advantages that the drafting orthopedic precision is high, the drafting angle is automatically adjusted, and the instantaneous center of the knee joint is fitted.

The utility model relates to the technical field of medical instruments, and discloses a foot auxiliary device for a knee joint operation, which comprises a fixing clamp, a first straight rod piece, a first corner direction adjusting piece, a healthy foot bearing plate, a second corner direction adjusting piece and an affected foot palm center supporting piece which are connected in sequence, the fixing clamp is used for clamping and fixing the foot auxiliary device and an operating bed, the healthy foot bearing plate is suspended outside the operating bed and used for bearing healthy feet, and the affected foot palm center supporting piece is in lap joint with the upper side of the tail of the operating bed. Thus, the healthy foot can be stably placed on the healthy foot bearing plate, discomfort caused by suspension of the healthy foot is effectively avoided, the palm center of the affected foot can be supported on the affected foot palm center supporting piece, the buckling angle is kept, and operation of an operator is facilitated.

The invention relates to the technical field of hip joint rehabilitation, in particular to a hip joint rehabilitation training bed with an adjustable buckling angle, comprising: a leg support mechanism comprising a support sleeve and a connecting frame rotatably connected to the bottom surface of the support sleeve; a bed plate; the driving mechanism is arranged below the leg supporting mechanism and comprises an overturning assembly, a bending assembly, an opening and closing assembly and a lifting assembly; the supporting sleeves are driven by the overturning assembly to rotate in the left-right direction, the rotating directions of the two supporting sleeves are opposite or opposite, the leg supporting mechanism is driven by the bending assembly to conduct single-end upwarp in the vertical direction in the head-tail direction of the bed board, and during upwarp, the two ends of the connecting frame are alternatively connected with the fixing plate. When the head is warped, the whole leg supporting mechanism moves towards the head of the bed board, the opening and closing assembly drives the two leg supporting mechanisms to move in the same direction or opposite directions in the arc direction of the fan-shaped groove, the rehabilitation training bed can achieve multi-posture hip joint training of a patient, can be suitable for training of patients of different body types and different states, and is good in overall practicability.

To provide a knee supporter capable of allowing a user to get at an ideal walking style and suppressing the abrasion of the articular cartilage of the leg due to the extension of the knee.SOLUTION: A knee supporter 1 includes a body part 2 which is substantially cylindrically attached from the femoral region to the crural region. The knee supporter comprises stretchable belts 3a and 3b which are spanned between the upper portion and the lower portion of the body part 2 and restrict extension of the knee by a tensile force, and stays 4a and 4b which vertically extend on at least one side of the left and right sides of the body part 2 and are rotatable around hinges 13 in response to bending of the knees. The rotation of the stays 4a and 4b is restricted so as not to be in a non-flexible state, that is, a fully extended state where an upper stay 11 and a lower stay 12 are linearly arranged in the vertical direction so that a flexion angle θ is 0°.SELECTED DRAWING: Figure 4

An extension-assisted hinged knee replacement comprises a femoral component, a tibial component, and a torque actuator operably interfacing the two components. The torque actuator is configured to apply extension torque based on the flexion angle of the knee, with the torque peaking between 0° and 90° of flexion. The implant may include a passive biasing element, which can be compressed or tensioned to enhance torque application, particularly during critical phases of knee extension.

Disclosed is a knee joint guide apparatus which can be driven even at any point on a plane in which an instantaneous rotation center of a knee joint can be positioned by a self-alignment function, and can also implement output performance required for a walking operation through a mechanical advantage change depending on a flexion angle. The knee joint guide apparatus includes: a proximal body link provided above a knee joint; a distal body link provided at a location corresponding to the proximal body link below the knee joint; and a planar rigid body 6-bar linkage mechanism including a plurality of revolute joints and a plurality of prismatic joints, and a plurality of links between the proximal body link and the distal body link to output a mechanical advantage depending on a flexion angle of the knee joint in movement of the knee joint with a self-alignment function.

The utility model provides an inflatable protection pad, including leg pad, leg pad is from top to bottom is divided into silica gel soft pad, sponge layer and inflatable air bag, silica gel soft pad cladding is in the top layer of sponge layer, is provided with antiskid line, the recessed fit of sponge layer is set to human body patella, inflatable air bag is fixed in the bottom one end of sponge layer, adjusts own height through the inflation port and the air outlet of side end, the utility model changes the contact area of knee joint and bed surface, reduces the pressure intensity of knee joint surface when prone position, reaches the purpose that reduces, prevents pressure injury, can raise foot ankle part, makes ankle joint natural bending, foot tip natural droop, keeps lower limb function position, prevents blood vessel nerve injury, reduces the postural surgical complication, can make femoral shaft and pelvis keep certain flexion angle simultaneously, prevents overstretching, keeps functional body position, avoids nerve and blood vessel injury, has inflatable air bag, can cooperate with external air blowing equipment and adjusts ankle height according to actual condition, adjusts knee flexion angle.

The invention relates to a device (100) for kinematically aligning a tibial cutting block, wherein the device (100) comprises a first correction device (106, 108, 111) and a second correction device (104, 108, 114), the first correction device (106, 108, 111) is designed to correct a flexion angle, the second correction device (104, 108, 114) is designed to correct a tibial cutting height, the first correction device and the second correction device comprise a guide (108) for a rod (104) for aligning the tibial cutting block, the guide (108) can be rotated in order to correct the flexion angle, and the rod (104) can be moved linearly in relation to the guide (108) in order to correct the tibial cutting height. The invention also relates to an instrument set comprising the device and to a method for configuring the device.

A method of evaluating a human knee joint includes: inserting a tensioner-balancer; moving the knee joint to one or more positions within its range of motion; using the tensioner-balancer to maintain a predetermined distraction load range or a predetermined distraction height range, and collecting distraction height data and distraction force data of the femur relative to the tibia; deriving ligament displacement data and load data; processing the collected data to produce a digital geometric model of the knee joint, wherein the model includes a ligament force versus displacement characterization curve for each of a plurality of flexion angles; using a software application, evaluating the digital geometric model of the knee in comparison to patient population data; using the software application, selecting a portion of the characterization curve that represents an optimized level of ligament tautness, based on the evaluation; and storing the digital geometric model for further use.

To provide a supporter that is easy to wear, can be worn daily, assists torque at a joint, and achieves both stability of the joint and ease of bending and stretching. [Solution] The artificial muscle type joint supporter is made of an elastic material and comprises a main body (16), an artificial muscle (10) having an air chamber (11) inside the main body, a supporter with a storage space for storing the artificial muscle and worn by the wearer so that the artificial muscle stored in the storage space covers the back of the joint and is fixed to the back of the joint, an air supply balloon that communicates with the air chamber inside the artificial muscle via a tube and can be manually operated to pressurize the air chamber by sending pressurized air into the air chamber inside the artificial muscle, an exhaust adjustment valve attached to the tube and capable of discharging air from the air chamber, and an adjustment body that adjusts the pressure in the air chamber by adjusting the amount of air discharged from the exhaust adjustment valve, and which causes the artificial muscle to expand and act on the back of the joint, thereby adjusting the wearer's walking assist force and the extension and flexion angles of the joint.

This utility model relates to the field of orthopedic rehabilitation training technology, and in particular to a hip joint trainer for orthopedic rehabilitation training, including a lower bed board; it also includes an upper bed board and a footboard. Fixed cylinders are fixedly connected to both sides of the rear end of the lower bed board. A rotating shaft is movably connected to both fixed cylinders. A second fixed cylinder is fixedly connected to the middle of the outer side of the rotating shaft. The upper bed board is fixedly connected to the end of the second fixed cylinder away from the lower bed board. A concave block is fixedly connected to the middle of the lower end of the lower bed board. This utility model controls the extension length of the device to a length suitable for the patient's leg flexion by adjusting the position of a laser rangefinder. When the distance between the laser rangefinder and the slider is zero, the controller controls the motor to rotate in the opposite direction, thus reciprocating and driving the patient's leg to perform back-and-forth stretching movements. Therefore, the device can be adjusted to the most suitable position for different patients with different leg flexion angles and lengths, accelerating the rehabilitation training process.

A method of evaluating a knee joint including a femur, a tibia, and ligaments, includes: inserting into the joint a tensioner-balancer; moving the joint while using the tensioner-balancer to maintain predetermined distraction force or distraction height, and collecting height and force data; deriving ligament displacement data and load data from the height and distraction data; processing the data into a digital model of the joint, including a characterization curve for a plurality of flexion angles; importing into the model implant geometry having femoral and tibial components, each having a back surface; updating the model with a location of femoral and tibial cuts, positioned such that when the components are placed in the joint with their back surfaces against the respective cuts, the implant will position the joint to function in a selected portion of the curve; and storing the model.

The invention relates to the technical field of physiotherapy, and discloses a physiotherapy control method and equipment for a vehicle and a storage medium, and the method comprises the steps: obtaining a current patella position of a user to be subjected to physiotherapy and a current buckling angle of a knee joint; determining a target position of a physiotherapy light spot according to the current patella position, and determining a target shape of the physiotherapy light spot according to the current buckling angle; wherein the buckling angle and the target shape of the physiotherapy light spot have a preset corresponding relation; and controlling physiotherapy equipment of the vehicle to emit physiotherapy light spots based on the target position and the target shape so as to irradiate the patella of the user to be subjected to physiotherapy for physiotherapy. Therefore, the target position and the target shape of the physiotherapy light spot are respectively determined through the current patella position and the current buckling angle, so that the irradiation position and the shape of the light spot better meet actual physiotherapy requirements, and the physiotherapy effect on a user is further improved.

The utility model relates to a hip joint angle trainer which comprises a mounting seat, a strapping tape, an angle sensor, an audible and visual alarm and a controller. Wherein the strapping tape is arranged on the mounting seat and is used for being mounted on the hip joint of a wearer in a strapping manner. The angle sensor is in wire connection with the controller, the controller is in control connection with the audible and visual alarm, and the angle sensor is used for monitoring the buckling angle of the hip joint. In addition, the angle sensor, the audible and visual alarm and the controller are fixedly arranged on the mounting seat in an integrated mode. Compared with the prior art, when the training device is used, a rehabilitation therapist can set a proper preset buckling angle and a proper preset stretching angle for a patient according to the rehabilitation level of the patient with the hip joint function damage, and the patient conducts rehabilitation training on the hip joint function under the guidance of the hip joint angle training device; and the scientificity and effectiveness of patient training can be improved. The hip joint angle trainer is easy to operate, low in price and suitable for being popularized in patients and rehabilitation therapists.

The application provides a method and device for measuring the angle between two bone blocks forming a joint, which can be used for real-time measurement of the flexion, valgus and varus angles of a knee joint in computer-aided knee joint replacement. The conversion relationship between the coordinate system of a 3D virtual bone model and the coordinate system of the markers collected from the actual bone surface is established by using an optical tracking system, and the angles are calculated by using the marker points extracted from the model, which are selected from the hip joint center H, the femoral knee joint center FK, the lateral epicondyle LE, the medial epicondyle ME, the tibial knee joint center TK, the tibial tuberosity TB and the ankle joint center AK. The method comprises the following steps: calculating the femoral mechanical axis direction vector and the tibial mechanical axis direction vector; calculating the flexion angle when the knee joint moves around the transverse axis on the sagittal plane. The valgus and varus angles can be determined by projecting the femoral axis and the tibial axis on the coronal plane Pc or the transverse plane. The application also provides a surgical robot system, a storage medium and a measuring device.

The present invention provides a lower limb exoskeleton, including a leg connecting rod mechanism, which includes a base, an active part, a first driving connecting rod, a second driving connecting rod, a hip joint swing rod, a thigh connecting rod, a thigh, and a calf; the active part is rotatably arranged on the base; the first ends of the first driving connecting rod and the second driving connecting rod are both hinged on the active part; the second end of the first driving connecting rod is hinged on the second hinge point of the hip joint swing rod; the two ends of the thigh connecting rod are respectively hinged on the third hinge point of the hip joint swing rod and the sixth hinge point of the calf; the first end of the thigh and the fourth hinge point of the hip joint swing rod are hinged at the same position of the base, and the second end of the thigh is hinged on the fifth hinge point of the calf; the second end of the second driving rod is hinged on the seventh hinge point of the thigh; the length of the second driving connecting rod is adjustable to change the maximum flexion angle of the thigh; the active part rotates to drive the thigh and calf to move, which can simulate the gait movement of the human body; the maximum flexion angle of the thigh is changed, and the difficulty of wearing is reduced.

The utility model relates to the technical field of pressure testing devices, in particular to a total knee joint prosthesis constraint degree testing tool which is fixed on a workbench of a tensile machine and comprises a fixing seat used for installing a tibia component and an adjusting seat used for installing a thighbone component, the fixing seat is arranged on the workbench, the adjusting seat is fixedly connected with a chuck of the tensile machine, and the adjusting seat is arranged on the workbench. The tibia assembly and the femur assembly are oppositely arranged, the workbench is further provided with a sliding rail for linear displacement of the fixing base, and one side of the fixing base is provided with a tension source used for driving the fixing base to move and enabling the tibia assembly on the fixing base to make contact with the femur assembly on the adjusting base. According to the total knee joint prosthesis constraint degree testing tool, through cooperation of the tensile machine for applying vertical pressure and the sliding seat for applying horizontal tensile force, two axial experiments are completed at a time, stress of load movement at different buckling angles is simulated, and the testing efficiency is effectively improved.

A method of evaluating a knee joint which includes a femur, a tibia, and ligaments, includes: inserting into a lateral or medial compartment of the joint a tensioner-balancer having apparatus for applying distraction force; moving the joint within its range of motion; maintaining a predetermined distraction load range or a predetermined distraction height range; collecting distraction height and force data of the femur relative to the tibia; deriving ligament displacement and load data from the height and force data; processing the data to produce a digital geometric model of the joint, the model including a ligament force versus displacement characterization curve for each of a plurality of flexion angles of the femur relative to the tibia; using a software application, evaluating the digital geometric model and selecting a portion of the curve that represents a predetermined desired level of ligament tautness; and storing the digital geometric model.

This invention provides a knee joint traction device and a method for using the knee joint traction device that can alleviate the pain of patients suffering from knee pain due to osteoarthritis of the knee and facilitate the transition to exercise therapy for many patients suffering from knee pain. [Solution] A knee joint traction device 1 for tractioning the knee joint 5 of a patient A lying supine, comprising: a vibrating member 9 that transmits vibrations to the popliteal fossa 44 by bending the knee joint 5 of the patient A lying supine at a predetermined flexion angle θ; a foot holding member 13 that is attached to the foot 11 of the patient A to hold the foot 11; a traction device 17; wires 15 and 16, one end of which is connected to the foot holding member 13 and wound between pulleys 19 and 20 positioned at appropriate locations, with the other end connected to the traction device 17; a spring 21 provided at an intermediate position between the wires 15 and 16; and a support frame 23 that supports these various components.

The invention relates to the field of medical care information, and discloses a knee joint rehabilitation auxiliary training system, which comprises a data acquisition unit; the central processing unit is used for acquiring multi-modal data including plantar pressure, a flexion angle of a knee joint and activation data of at least one muscle, and at least part of the data is from the data acquisition unit; the activation level of the muscle is calculated based on the activation data of the muscle and the corresponding personal maximum voluntary contraction data, the activation level of the muscle is compared with a corresponding target threshold value to obtain a first comparison result, and first feedback information corresponding to the muscle is generated based on the first comparison result; calculating a dynamic load index of the knee joint by utilizing a dynamic load index calculation model at least based on the buckling angle and the plantar pressure, comparing the dynamic load index with a safe load interval to obtain a second comparison result, and generating second feedback information based on the second comparison result; the display unit is used for displaying the first feedback information and the second feedback information to assist the patient in achieving the training target. And the safety is improved.

The invention relates to the technical field of medical equipment, and discloses an elbow joint limiting anti-tube-falling device which comprises a large arm supporting body, a small arm supporting body, a bandage, a buffer cushion a and a buffer cushion b and further comprises an angle limiting mechanism and an over-limit alarm mechanism. The angle limiting mechanism comprises connecting rods a fixedly installed at the lower ends of the two sides of the large arm supporting body through screws, outer cover plates are arranged at the lower ends of the connecting rods a, pressing locking assemblies are movably installed in the outer cover plates, and connecting rods b are arranged on the side walls of the pressing locking assemblies. The over-limit alarm mechanism comprises an electronic element groove and a sound hole which are formed in the pressing and locking assembly, a battery, a loudspeaker and a control assembly are fixedly installed in the over-limit alarm mechanism, and a pressure sensing piece is arranged on the peripheral side of the pressing and locking assembly; according to the elbow joint limiting anti-tube-falling device, the angle limiting mechanism capable of adjusting the bending angle of the elbow joint and the over-limit alarm mechanism are designed and adopted, and when a patient tries to exceed the limiting angle, the safety of the patient can be effectively guaranteed, and the risk of unplanned tube drawing is reduced.

The embodiment of the application is suitable for the field of computer-aided medical technology, and provides a kind of orthopedic surgery robot system and computer program product, the orthopedic surgery robot system includes orthopedic surgery robot and connected flexible pressure sensor;Wherein: flexible pressure sensor is used to collect the first data of knee joint in the operation process, and first data is transmitted to orthopedic surgery robot, and first data at least includes the stress information of knee joint in the operation process;Orthopedic surgery robot is used to obtain the second data corresponding to first data in the operation process, generates visual knee joint stress distribution information according to first data and second data, and displays knee joint stress distribution information through display interface, and second data at least includes the flexion angle and joint clearance of knee joint.The orthopedic surgery robot system described above can accurately monitor the stress condition of knee joint in the operation process, and provide accurate mechanical feedback for the operation.

The utility model discloses a multi-purpose body position placing device for lower limb joint surgery, which relates to the technical field of surgical equipment and comprises an operating table, a first lower limb rest stand is movably arranged at one end of the top of the operating table, a second lower limb rest stand is movably connected to one end of the operating table, and a connecting plate is arranged between the first lower limb rest stand and the second lower limb rest stand. Two sets of mounting seats are arranged on the two sides of the outer wall of the operating table, supporting rods are arranged on the outer walls of the mounting seats, a fixing block is arranged between the supporting rods, a rotating rod is arranged at the top of the fixing block, and a foot rest stand is arranged on the outer wall of the rotating rod. The knee joint bending angle of a patient is adjusted by adjusting the first lower limb rest stand and the second lower limb rest stand, then the lower limb rest stands are fixed through the cooperation of the rotary knobs and the lifting rings, and therefore the problem that the lower limb rest stands cannot be fixed in the operation process is solved. The technical problem that the thigh of an affected limb needs to be manually lifted to maintain flexion of the knee joint or fix the knee joint is solved, manpower is saved, and meanwhile operation efficiency is improved.

The application discloses a kind of rotation forming postoperative prosthesis system with knee joint protection, including: prosthesis support, fixed cavity, first inertial measurement unit, second inertial measurement unit, controller and motor correction protection device;Prosthesis support is used to replace physiological shank and foot before amputation;Fixed cavity is used to wrap thigh and protect hip joint;First inertial measurement unit is fixed to the lateral wall of fixed cavity, for measuring angular velocity value on the thigh of prosthesis;Second inertial measurement unit is fixed to the shank support part of prosthesis support, for measuring angular velocity value on the shank of prosthesis;Controller is used to calculate the flexion angle of knee joint according to the angular velocity value transmitted by first inertial measurement unit and second inertial measurement unit, and calculate the rotation angle of prosthesis according to the flexion angle of knee joint;Motor correction protection device is fixed on prosthesis support and fixed cavity, for controlling the rotation angle of prosthesis to correct and protect the over-torsion of knee joint according to the control of controller.

The application relates to the field of healthcare information, and discloses a knee joint rehabilitation auxiliary training system, which comprises a data acquisition unit, a central processing unit, a display unit and the like. The central processing unit is used for acquiring multi-modal data, including plantar pressure, a flexion angle of a knee joint and activation data of at least one muscle, at least part of the data being from the data acquisition unit; calculating an activation level of the muscle based on the activation data of the muscle and corresponding personal maximum voluntary contraction data, comparing the activation level of the muscle with a corresponding target threshold to obtain a first comparison result, and generating first feedback information corresponding to the muscle based on the first comparison result; calculating a dynamic load index of the knee joint by using a dynamic load index calculation model based on at least the flexion angle and the plantar pressure, comparing the dynamic load index with a safe load interval to obtain a second comparison result, and generating second feedback information based on the second comparison result; and the display unit is used for displaying the first feedback information and the second feedback information to assist a patient in achieving a training target. The safety is improved.