29 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.

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 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.

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.

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.

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.

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 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 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 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.

The invention discloses a method for accurately positioning and quantifying a achilles tendon broken end under the guidance of B ultrasound, which belongs to the technical field of medical information processing, and comprises the following steps of: acquiring a multi-angle B ultrasound image of an achilles tendon area acquired by multi-angle B ultrasound scanning equipment for segmentation processing, identifying and extracting a gap between an achilles tendon boundary and the broken end, generating segmentation result data, and determining whether the achilles tendon area is a fractured end or not. Constructing a three-dimensional point cloud model through feature point registration, and calculating and generating broken end quantization parameters; foot posture information collected by an inertial measurement unit is obtained, and foot flexion and extension angle data are extracted from the foot posture information; correlating the broken end quantization parameter with the foot flexion and extension angle data to generate a dynamic tension displacement curve; and determining a safe suture tension threshold based on the dynamic tension displacement curve, and outputting the safe suture tension threshold to a surgical navigation interface to generate navigation information. According to the method, the dynamic biomechanical model is constructed by adopting multi-modal data fusion, and the navigation information is generated based on the dynamic biomechanical model, so that the achilles tendon repair operation can be quantified and referenced.

The present invention provides a pneumatic rehabilitation glove, comprising a glove body and a plurality of telescopic parts; the telescopic parts are configured to extend and retract; the glove body includes a finger portion, the finger portion being configured to correspond to each finger of a subject, a portion of the plurality of telescopic parts being disposed on the finger portion, such that at least one telescopic part is disposed corresponding to the distal phalanx of at least one of the subject's fingers; a portion of the plurality of telescopic parts being disposed on at least one of the subject's fingers, and disposed on the remaining portion of the finger excluding the distal phalanx, such that at least two telescopic parts are disposed corresponding to any non-distal phalanx of at least one of the subject's fingers. The pneumatic rehabilitation glove of the present invention achieves the purposes of multi-point expansion and contraction and multi-point fixation through the location of the telescopic parts, can ensure the fit of the glove to the subject's fingers, allows the subject's fingers to have a large flexion angle during training, avoids the occurrence of arching, and ensures the rehabilitation effect.

The invention relates to an information display method and device, computer equipment and a storage medium. The method comprises the steps of displaying target parameter information of a knee joint in response to a display operation based on an interactive interface, and determining a target extension and flexion angle from all first extension and flexion angles in response to a selection operation for at least one piece of parameter information in the target parameter information so as to display a target knee joint model corresponding to the target extension and flexion angle. Wherein the target parameter information comprises a plurality of first stretching and bending angles of the knee joint and at least one kind of physiological parameter information under each first stretching and bending angle. By adopting the method, scientific researchers can conveniently check physiological parameter information of the knee joint.

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.

The invention discloses a unicompartmental knee joint tightness measuring device in the technical field of medical instruments. The unicompartmental knee joint tightness measuring device comprises a gasket, a through groove parallel to the gasket is formed in the gasket, a bending angle measuring assembly and a tightness measuring assembly are arranged at one end of the through groove, a curve recording assembly is arranged at the other end of the through groove, and a prosthesis positioning assembly is fixedly connected to the top wall of the gasket. The elastic pressure between the femoral condyle and the tibial plateau is reflected through the compression amount of the spring, the elastic pressure is expressed on the instrument panel in a mechanical mode to help a doctor to measure the dynamic elastic pressure at the full buckling angle, the operation efficiency is improved, and the postoperative hidden danger is reduced; and an external laser sensor is used for configuring a dip angle before osteotomy to position a prosthesis dip angle and an osteotomy line on the femoral condyle, so that a doctor can conveniently restore the original femoral condyle contour of a patient by installing a prosthesis after osteotomy, and more data support is provided for exploring the principle and technical improvement of unicompartmental knee arthroplasty.

An electronic computing system to generate information relating to a gait of a human. A first sensor proximate the heel detects a first location of a heel of the human at an initiation of a swing phase for a corresponding leg. A second sensor proximate the knee detects a first, concurrent, location of a corresponding knee. The system calculates a first angle θ1 defined by a vertex, A, at the first location of the knee formed by a first side, B, defined by a straight vertical line that intersects the first location of the knee and a second side, C, defined by a straight line that intersects the first location of the knee and the first location of the heel. The system then calculates a maximum flexion of the knee at the initiation of the swing phase for the corresponding leg based on the first angle θ1.

This disclosure relates to surgical instruments for alignment of bone cuts during surgeries on joints and in particular, during total replacement of joints. The surgical instrument comprises a contact surface shaped to fit a prepared end of the first bone of the joint and an artificial articular surface that imitates the native articular surface of the first bone that has been removed by the preparation of the first bone. The artificial articular surface is pivotable in relation to the surgical instrument. The instrument can be fitted onto the prepared bone and coronal balancing can be performed. After fixing a further instrument to the second bone the joint can be balanced in flexion. At the optimal flexion angle, the slope and the cutting depth can be adjusted to achieve alignment. The further instrument is then used as a guide for cutting the second bone at the resulting cutting depth, slope and varus / valgus angle.

A surgical system includes a tracking system configured to obtain data indicative of a pose of a first bone of a joint and a pose of a second bone of the joint, a display device configured to display a graphical user interface, and circuitry configured to determine an acceptable range of flexion angles of the joint for a gap capture step, determine a current flexion angle of the joint based on the data from the tracking system, determine the current flexion angle relative to the acceptable range of flexion angles for the gap capture step, and control the display device to provide, via the graphical user interface, a visualization of the current flexion angle relative to the acceptable range of flexion angles for a gap capture step.

An arm brace providing adjustable permitted flexion of the arm at the elbow includes an adjustable upper arm section, an adjustable lower arm section, a stoppable hinge connecting the arm sections, a stop to stop the hinge, and adjustable closures to connect the brace system to the upper and lower arm of a patient around the elbow. The stoppable hinge includes a stop receiver with slot detents for inserting a stopping tab at angular settings for permitted arm flexion, and an edge, for interacting with the stopping tab. The upper and lower arm sections are adjustable left-to-right to fit the patient's arm by a ratchet mechanism.