13 results about "Mechanical axis" patented technology

The invention discloses a novel extensible long intramedullary rod and a matched tool, and relates to the technical field of medical instruments, the novel extensible long intramedullary rod comprises a female rod and a male rod, one end of the female rod is provided with a fixed tip, the other end of the female rod is provided with a blind hole, the male rod is sleeved with the blind hole, the fixed tip is used for being connected with the epiphysis of the far end of a long bone, and the end of the male rod is flush with an implantation opening. And the length of the male rod sleeved into the female rod is at least 1 / 2 of the length of the female rod. The extensible long intramedullary rod can effectively fix a long bone, prevent fracture of the long bone and maintain the shape of the long bone, can gradually achieve the purpose of extension along with the growth of the bone, can better maintain the mechanical axis of the bone, has a stronger protection effect on the fracture end, is particularly suitable for being applied to special patients in the department of orthopedics of children, and has a wide application prospect. And intraoperative and postoperative protection of lower limb long bone malformation and fracture caused by osteogenesis insufficiency and congenital long bone artificial joints can be realized.

ORTHOPEDIC LEG ALIGNMENT SYSTEM AND METHOD Abstract An orthopedic measurement system is disclosed to measure leg alignment. The measurement system includes a tri-axial gyroscope con­ figured to measure movement of a leg. The gyroscope is coupled to a tibia of the leg. For example, the gyroscope can be placed in an insert or tibial pros - thetic component that couples to the tibia. The gyroscope is used to measure alignment relative to the mechanical axis of the leg. The leg alignment measurement is performed by putting the leg through a first leg movement and a second leg movement. The gyroscope outputs angular velocities on the axes the sensor is rotated about. The gyroscope is coupled to a computer that calculates the alignment of the leg relative to the mechanical axis from the gyro - scope measurement data. ORTHOPEDIC LEG ALIGNMENT SYSTEM AND METHOD Abstract An orthopedic measurement system is disclosed to measure leg alignment. The measurement system includes a tri-axial gyroscope con- figured to measure movement of a leg. The gyroscope is coupled to a tibia of the leg. For example, the gyroscope can be placed in an insert or tibial pros - thetic component that couples to the tibia. The gyroscope is used to measure alignment relative to the mechanical axis of the leg. The leg alignment measurement is performed by putting the leg through a first leg movement and a second leg movement. The gyroscope outputs angular velocities on the axes the sensor is rotated about. The gyroscope is coupled to a computer that calculates the alignment of the leg relative to the mechanical axis from the gyro - scope measurement data.20 25 20 12 68 21 F eb 2 02 5 O R T H O P E D I C L E G A L I G N M E N T S Y S T E M A N D M E T H O D A b s t r a c t 2 0 2 5 2 0 1 2 6 8 2 1 F e b 2 0 2 5

To select and accurately position a component of an artificial joint without excessively complicating a technique, inundating medical workers, and / or burdening a doctor or a medical facility with a large cost of a complicated navigation system.SOLUTION: The present invention provides, in certain embodiments, a device for determining a tibial mechanical axis and a femoral mechanical axis. The present invention also provides surgical orientation devices, reference devices, and / or modules configured to track mechanical axes during movement to facilitate limb alignment. The present invention further provides surgical orientation devices, reference devices, and / or modules configured to determine gap measurements.SELECTED DRAWING: Figure 12

A system may include an implantable device having at least a first sensor configured to collect first data regarding one or more characteristics of a bone of a patient, wherein the implantable device is configured for implantation in a medullary canal of the tibia. The system may include an attachment member configured to couple with the implantable device when the implantable device is implanted in the medullary canal of the tibia. The system may further include a targeting device moveably coupled to the attachment member, wherein the targeting device is configured to reference a distal anatomy of a leg, and wherein the targeting device has at least a second sensor configured to collect second data regarding at least a position of the targeting device.

Example methods and systems may be used intraoperatively to help surgeons perform accurate and replicable surgeries, such as knee arthroplasty surgeries. An example system combines real time measurement and tracking components with functionality to compile data collected by the hardware to register a bone of a patient, calculate an axis (e.g., mechanical axis) of the leg of the patient, assist a surgeon in placing cut guides, and verify a placement of an inserted prosthesis.

The present invention provides, in certain embodiments, a device for determining the tibial mechanical axis and the femoral mechanical axis. The present invention also provides a surgical orientation device, a reference device, and / or a module configured to track the mechanical axes during movement to facilitate limb alignment. The present invention further provides the surgical orientation device, the reference device, and / or the module configured to determine a gap measurement.

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.

This application provides a method for calculating the lower limb force line angle in total knee arthroplasty, comprising: transforming a first skeletal mechanical axis at an initial position in an image coordinate system to a defined first prosthesis coordinate system; transforming the first skeletal mechanical axis in the first prosthesis coordinate system to a second prosthesis coordinate system when the first prosthesis rotates to the position of the condyle under weight-bearing; transforming the first skeletal mechanical axis in the second prosthesis coordinate system to the image coordinate system; and projecting the angle between the first skeletal mechanical axis and the second skeletal mechanical axis onto the coronal plane to obtain the lower limb force line angle. Using the condyle position as a transformation constraint, and through matrix transformation between the established skeletal coordinate system and the prosthesis coordinate system, the HKA angle is calculated intraoperatively, providing more accurate quantitative calculation results for total knee arthroplasty.

The present application relates to the Brown orthopedic traction device, it includes the leg rest structure and traction structure, wherein the leg rest structure includes the chassis, the calf support and the thigh support, the traction structure includes the traction frame, the frame wheel, the traction rope, the traction power device, the traction bow. One aspect of the present application not only reduces the difficulty of patient posture adjustment and operation, but also greatly reduces the risk of limb injury, body position discomfort, muscle tension, pressure sores and other complications caused by traction, and also reduces the risk of deformity healing or delayed healing rate; on the other hand, based on the height and angle adjustment of the traction frame, the position and traction direction of the traction bow are adjusted, without the need for further leg rest position adjustment, reducing the difficulty of traction; at the same time, based on the cooperation of the length and angle of the four-section traction rope, not only can the current traction be continued in the dynamic balance mode, but also the traction position and angle can be kept unchanged to implement the traction force change, so as to improve the traction direction and mechanical axis coincidence degree, thereby reducing the risk of traction injury.

Disclosed herein are a system for determining ligament tension and a method for utilizing the same in a knee balancing procedure. The system according may include a first sensor to measure a first load at a first condyle of a femur, a second sensor to measure a second load at a second condyle of the femur, an inertial measurement unit to measure angular change of a tibial mechanical axis of a tibia during a rotation of the tibia in a coronal plane, and a display in communication with the first sensor, the second sensor and the inertial measurement unit for displaying a ligament stress-strain curve. The method may include the steps of rotating a tibia toward a first condyle, measuring first load values and first deflection angles of the tibia, and determining a stress-strain curve of a first ligament from the first load values and first deflection angles.

The invention relates to a traction frame of a Braun orthopedic traction device, which comprises a traction frame, a frame wheel, a traction rope, a traction power device and a traction bow. The traction frame is adjusted in front and back by a locking part from the bottom relative to the leg rest frame. The height of the frame top is adjusted by the extension and contraction of the left and right sides of the traction frame. The frame wheel comprises a first, second and third pulley group. The traction rope comprises a first, second, third and fourth section. The invention adjusts the position and direction of the traction bow based on the height and angle of the traction frame without adjusting the leg position again, which reduces the difficulty of traction. The length and angle of the four sections of the traction rope cooperate, which not only continuously tractions in the dynamic balance mode, but also changes the traction force while keeping the traction position and angle unchanged, which improves the traction direction and the mechanical axis, thereby reducing the risk of traction injury.

This invention relates to a method and system for assisting in the identification of knee alignment anomalies considering anatomical constraints. The method includes: acquiring the original aspect ratio of a raw medical image; adaptively filling the raw medical image based on a comparison between the original aspect ratio and a target aspect ratio; using the filled image as input to a depth coordinate regression model to obtain normalized coordinate vectors of key feature points based on global anatomical constraints; converting the normalized coordinate vectors into physical coordinates in the original coordinate system; calculating the angle between the femoral mechanical axis vector and the tibial mechanical axis vector, and calculating the vertical distance from the center point of the knee joint to the total mechanical axis of the lower limb; and generating knee alignment anomaly identification prompts. Compared with existing technologies, this invention has advantages such as accurate geometric measurements, strong robustness, high clinical deployment efficiency, and reliable identification results.