41 results about "Knee joint replacement" patented technology

The invention discloses a hip and knee joint replacement postoperative rehabilitation method and system based on mobile medical treatment, relates to the technical field of medical rehabilitation, and discloses the hip and knee joint replacement postoperative rehabilitation method and system based on mobile medical treatment. The training plan is dynamically adjusted in combination with multi-dimensional indexes, the problems of compensation recognition deficiency, feedback lag and plan stiffness in a traditional rehabilitation scheme are effectively solved, the rehabilitation effect can be improved, and the injury risk of adjacent joints can be reduced.

The invention provides an osteotomy path adjusting system in robot-assisted knee arthroplasty, and belongs to the technical field of knee joint detection. The system comprises a multi-modal data acquisition unit which comprises a knee joint pressure measuring gasket, an optical acquisition module and a kinematics data acquisition module, the knee joint pressure measuring gasket is used for acquiring knee joint pressure signals in an operation, and the optical acquisition module is used for acquiring relative poses of a femur and a tibia; the kinematics data acquisition module is used for acquiring kinematics data of the mechanical arm; the main control calculation unit comprises a data fusion module and a dynamic compensation module, and the data fusion module is used for constructing a synchronous spatio-temporal data set; and the dynamic compensation module is used for outputting a compensation instruction to the mechanical arm to adjust an osteotomy path based on the synchronous spatio-temporal data set, the preoperative predicted pressure prediction matrix and the soft tissue stiffness matrix. The pressure change in the operation can be responded in real time, the operation precision of the knee arthroplasty is improved, and the dependence on the experience of doctors can be reduced.

The invention provides a data processing method, medium and equipment in knee arthroplasty, and belongs to the technical field of medical electronics. The method comprises the following steps: acquiring pressure distribution data, measured by an array sensor, of an articular compartment in a complete period of joint movement; based on the pressure distribution data, pressure centers under all buckling degrees in the whole period of joint movement are calculated, and corresponding pressure center tracks are formed; calculating shear stress distribution data under the complete period of joint movement based on the pressure center track data; based on the pressure distribution data, calculating a dynamic pressure envelope line under the complete period of the joint movement; and generating an intraoperative correction suggestion for knee arthroplasty based on the pressure center trajectory, the shear stress distribution data and the dynamic pressure envelope. The correction suggestions given by the method are more accurate for abnormal conditions occurring in knee replacement.

Methods and devices are disclosed for soft tissue balancing of a knee joint during an arthroplasty procedure that include balancing the knee joint at or near mid-flexion, while maintaining the rotational position of the femur with respect to the tibia that replicates proper kinematic placement of these bones. Also disclosed are methods and devices for soft tissue balancing of a knee joint during an arthroplasty procedure that include balancing the knee joint at or near mid-flexion using one or more expansion devices that are not actively requiring monitoring and / or recording of forces applied by the bodily tissues, but instead uses incremental changes in actual length / height of the expansion device to determine whether the joint is properly tensioned or too lax.

Methods and devices are disclosed for soft tissue balancing of a knee joint during an arthroplasty procedure that include balancing the knee joint at or near mid-flexion, while maintaining the rotational position of the femur with respect to the tibia that replicates proper kinematic placement of these bones. Also disclosed are methods and devices for soft tissue balancing of a knee joint during an arthroplasty procedure that include balancing the knee joint at or near mid-flexion using one or more expansion devices that are not actively requiring monitoring and / or recording of forces applied by the bodily tissues, but instead uses incremental changes in actual length / height of the expansion device to determine whether the joint is properly tensioned or too lax.

The invention relates to a knee joint endoprosthesis (1) having a femoral component (10) for anchoring to a distal end of a femur and a tibial component (30) for anchoring to a proximal end of a tibia, wherein the femoral component and the tibial component each have a surface (17, 37) that is porous and / or has elevations and depressions. The invention further relates to a surgical kit for knee joint replacement.

This application relates to the field of medical device technology, specifically to an extramedullary positioning distal femoral osteotomy device for knee replacement, comprising an osteotomy plate, an axial indicator, a rotating component, and a reference plate. The osteotomy plate has a reference end face and an abutment end face, with a cutting suture and pin holes provided on the reference end face. The axial indicator is rotatably mounted on the reference end face; the rotating component is rotatably mounted on the reference end face; the reference plate is slidably mounted on the rotating component, and the reference plate can slide on the rotating component in a direction away from or close to the rotation axis of the rotating component, with the reference plate perpendicular to the reference end face. In this application, the axial indicator determines the direction of the patient's femoral axis, ensuring that the movement of the osteotomy plate is consistent with the direction of the femoral axis, thereby improving the accuracy of the cutting position during surgery. The rotating component and the reference plate allow the surgeon to adjust according to the preoperatively determined angle of the prosthesis articular surface, enabling precise matching of the cutting suture angle with the prosthesis articular surface, further improving the precision of the surgery.

The application discloses a hip-knee joint replacement postoperative rehabilitation method and system based on mobile medical treatment, relates to the technical field of medical rehabilitation, and discloses the hip-knee joint replacement postoperative rehabilitation method and system based on mobile medical treatment. The wearable sensor is used for monitoring patient motion data in real time and recognizing compensatory behavior. A training plan is dynamically adjusted in combination with multidimensional indexes, the problems of missing compensation recognition, feedback lag and plan rigidity in the traditional rehabilitation scheme are effectively solved, the rehabilitation effect can be improved, and the risk of adjacent joint injury can be reduced.

Robotic systems for orthopedic surgery are provided. The robotic systems may include at least first and second motors coupled to each other. An output shaft of one of the motors may be connectable to a surgical tool guide. An output shaft of another of the motors may be coupled to a portion of a ball and socket joint. A corresponding portion of the ball and socket joint may be coupled to a bone mount which may be attached to a bone to mount the first and second motors to bone for performing orthopedic surgical procedures.

A handheld three-axis swing saw type knee joint replacement robot system comprises a handheld instrument part and a navigation control part for guiding the handheld instrument part to accurately position and cut a target tissue in an operation, and the handheld instrument part further comprises an operation main body and a three-axis dynamic following mechanism; the three-axis dynamic following mechanism further cuts a tail end control unit, a rolling connection control unit and a pitching lifting control unit; the transverse rolling connection control unit is configured to enable the first fuselage to actively rotate around a transverse rolling shaft where the first fuselage is located relative to the second fuselage; the pitching lifting control unit is configured to enable the second fuselage to perform pitching angle control around a pitching shaft relative to the third fuselage and / or enable the second fuselage to perform lifting control relative to the third fuselage; the navigation control part is used for respectively controlling the cutting tail end control unit, the rolling connection control unit and the pitching lifting control unit to carry out three-degree-of-freedom joint motion of pitching, lifting and rolling so as to ensure the follow-up alignment operation of the operation execution part and the osteotomy surface.

The invention provides a human body model for a knee joint replacement simulation operation, and relates to the field of human body models. The human body model for the knee joint replacement simulation operation comprises a base and a knee joint model, a driving motor is fixedly arranged at the midpoint of the bottom end face in the base, a driving shaft is fixedly arranged at the output end of the driving motor, a mounting seat is fixedly arranged at the upper end of the driving shaft, and an electric telescopic rod is fixedly arranged on one side of the outer wall of the mounting seat. A supporting mechanism is fixedly arranged at the midpoint of the upper end face of the mounting base and comprises a first supporting rod and a second supporting rod, the first supporting rod and the second supporting rod are connected through a folding assembly to achieve 90-degree overturning, and the folding assembly comprises a first rotating shaft. According to the knee joint human body model, flat-lying type operation scene simulation can be achieved, the anthropomorphic bending and stretching effect can be achieved, and therefore operation of a replacement simulation operation and simulation judgment of operation success are facilitated.

A computer-implemented method for creating an activity-optimized cutting guides for surgical procedures includes receiving one or more pre-operative images depicting one or more anatomical joints of a patient, and creating a three-dimensional anatomical model of the one or more anatomical joints based on the one or more pre-operative images. One or more patient-specific anatomical measurements are determined based on the three-dimensional anatomical model. A statistical model of joint performance is applied to the patient-specific anatomical measurements to identify one or more cut angles for performing a surgical procedure. A patient-specific cutting guide is created that comprises one or more apertures positioned based on the one or more cut angles.

The invention discloses a knee joint osteotomy guide plate and a use method thereof, and relates to the field of knee joint replacement tools, the knee joint osteotomy guide plate comprises a thighbone osteotomy guide plate, the thighbone osteotomy guide plate comprises a thighbone guide plate main body and a thighbone insertion block, the thighbone guide plate main body and the thighbone insertion block are in insertion fit, and the thighbone guide plate main body is provided with a first binding surface, a first spicule fixing hole and a thighbone osteotomy groove; a second binding surface is arranged on the thighbone insertion block, and the first binding surface and the second binding surface are used for being attached to the thighbone surface or the thighbone osteophyte; the tibia osteotomy guide plate comprises a tibia guide plate main body and a tibia insertion block, the tibia guide plate main body and the tibia insertion block are matched in an inserted mode, the tibia guide plate main body is provided with a third attaching face, a second bone needle fixing hole and a tibia osteotomy groove, the tibia insertion block is provided with a fourth attaching face, and the third attaching face and the fourth attaching face are used for being attached to the tibia face or the tibia osteophyte; according to the osteotomy guide plate, an osteotomy plane is accurately positioned by utilizing a plurality of parts or osteophyte with obvious knee joint bone tissue characteristics, so that the osteotomy accuracy is improved, and the surgical risk can be reduced.

The utility model discloses a kind of knee joint replacement postoperative rehabilitation pressing devices, including stand, one end of the stand is movably connected with movable seat, one end of the movable seat is fixedly connected with lifting seat, the both sides of the lifting seat are movably connected with telescopic plate, one end of the telescopic plate is fixedly connected with boom, the utility model has beneficial effect, first power mechanism, second power mechanism, third power mechanism and inflation mechanism are respectively driven by controller to operate, so that two groups of fixed rods can be clamped to the calf and thigh in the air, its knee is located in the just below lifting seat, finally again through first power mechanism drive lifting seat slowly lift, lifting lifting seat pushes the lifting of hanged clamping seat, clamping seat drives the lifting of connected clamping plate, clamping plate can repeatedly press the leg of clamping, structure is reasonable, it is convenient for automatic pressing of leg, less manual labor, it is convenient to adjust simultaneously, it is convenient for different body size patient to be clamped and pressed.

The invention relates to the technical field of intelligent rehabilitation devices, in particular to a knee joint replacement postoperative lower limb rehabilitation training system based on somatosensory interaction. Comprising a posture supporting device capable of being arranged to be in a lying or side lying state, an infrared rehabilitation mechanism used for conducting microcirculation adjustment on lower limbs before rehabilitation, a sensing detection mechanism used for providing motion resistance, a physical sign obtaining mechanism used for obtaining physical sign information and a somatosensory obtaining mechanism used for obtaining dynamic motion data. The rehabilitation analysis mechanism is connected with the physical sign acquisition mechanism and the somatosensory acquisition mechanism; and the processor is used for determining microcirculation setting parameters based on the acquired physical signs and somatosensory data, determining a single motion period according to motion resistance changes, extracting real-time motion resistance and joint vibration signals under corresponding actions based on the single motion period to determine a motion fatigue attenuation coefficient, and determining rehabilitation progress according to the motion fatigue attenuation coefficient. The motion resistance is intelligently adjusted based on multiple sensing data, and the rehabilitation efficiency of a user can be improved.

The invention provides a prosthesis taking-out device for a knee joint replacement revision operation based on a high-frequency electrotome, and belongs to the technical field of medical instruments. Comprising a high-frequency electrotome pen head, the top end of the high-frequency electrotome pen head is fixedly connected with a high-frequency electrotome pen body, the top end of the high-frequency electrotome pen body is provided with a connecting plate, the connecting plate is provided with a first negative pressure pipe, the first negative pressure pipe penetrates through the connecting plate, and the top end of the high-frequency electrotome pen body is in threaded connection with a fixing cap; the fixing cap is movably connected with the first negative pressure pipe in a sleeved mode, and the fixing cap is located at the top end of the high-frequency electric knife pen body and attached to the connecting plate. According to the high-frequency electrotome pen, the high-frequency electrotome pen head is arranged, bone cement is subjected to hot melting by heating a prosthesis, the stripping difficulty of the main bone of a prosthesis patient is lowered, the requirements for operation experience and the technology are lowered, and the high-frequency electrotome pen has the advantages of being simple in structure, convenient to use and high in practicability. The suction assembly sucks the hot-melted bone cement.

The utility model relates to the technical field of hip and knee joint replacement postoperative recovery instruments, and provides a quadriceps femoris contraction exercise prompter which comprises a patella sleeve, a sounder, an air bag, a pressure recorder and a counter, the air bag, the pressure recorder and the counter are arranged on the patella sleeve, the air bag corresponds to popliteal fossa, an air outlet nozzle is arranged on the air bag, and the sounder is detachably arranged in the air outlet nozzle. According to the quadriceps femoris training device, the patella sleeves are arranged on the legs to fix the air bags on the popliteal fossa of the patient, when the patient performs quadriceps femoris training, the knees exert force downwards to exert pressure on the air bags, after the air bags are contracted, prompt sound is given out through the sounder, and therefore the effect that the patient can be informed whether the action is qualified or not without accompanying of family members is achieved; meanwhile, the number of times of compression of the air bag is counted through the counter so as to judge the number of times of exercise of the patient, medical staff can conveniently judge the effectiveness of quadriceps femoris exercise, rehabilitation of the patient is promoted, the self-protection capacity of the patient is improved, and the labor cost is reduced.

The application provides a bone-cutting guide for knee joint replacement surgery navigation and a use method thereof. The bone-cuting guide comprises: a navigation array for calibrating the position of a saw blade in a navigation system; a saw blade fixing seat for fixing a bone needle and mounting the saw blade; a first direction adjusting structure for adjusting the movement of the saw blade fixing seat; and a bone needle for being fixed in a bone needle hole of the saw blade fixing seat. Compared with the prior art, the application can realize accurate positioning of the angle and position of bone cutting by calibrating the position of the saw blade in the navigation system in time. Compared with the scheme in which a doctor uses a traditional surgical tool to perform bone cutting, the bone-cuting guide and the bone-cutting method have high position accuracy and depend less on the experience of the doctor, and compared with the scheme in which bone cutting is performed by cooperation of full intelligent navigation technology and a mechanical arm, the application does not need the participation of the mechanical arm, the operation steps are simple, and the surgical cost is reduced.

Methods and devices are disclosed for soft tissue balancing of a knee joint during an arthroplasty procedure that include balancing the knee joint at or near mid-flexion, while maintaining the rotational position of the femur with respect to the tibia that replicates proper kinematic placement of these bones. Also disclosed are methods and devices for soft tissue balancing of a knee joint during an arthroplasty procedure that include balancing the knee joint at or near mid-flexion using one or more expansion devices that are not actively requiring monitoring and / or recording of forces applied by the bodily tissues, but instead uses incremental changes in actual length / height of the expansion device to determine whether the joint is properly tensioned or too lax.

The application discloses a knee joint replacement surgery auxiliary positioning method, electronic equipment and a storage medium. The method calculates the distance between the end tool of the mechanical arm and the surgery planning plane, the first included angle between the end tool plane of the mechanical arm and the surgery planning plane, and the second included angle between the sawtooth of the end tool of the mechanical arm and the cutting direction of the surgery planning plane at the current time, respectively. When the end tool of the mechanical arm reaches the surgery planning plane, the end tool plane of the mechanical arm is parallel to the surgery planning plane, and the sawtooth of the end tool of the mechanical arm is directed to the cutting direction of the surgery planning plane, it is determined that the positioning of the mechanical arm at the current time is accurate, the movement of the mechanical arm is controlled to stop, and when the condition is not met, the pose of the mechanical arm at the next time is calculated, the movement of the mechanical arm is controlled according to the pose at the next time, the auxiliary positioning under any pose is realized, and the application scenarios are wider than those of the prior art.

The invention relates to the technical field of crossing of orthopedic medical instruments and biomedical engineering, and discloses a knee joint personalized prosthesis appearance and implantation orientation modulation method and system based on anatomy-motion-dynamics contradiction resolution, and the method comprises the steps: constructing an energy functional of a skeleton-ligament-prosthesis system based on a minimum potential energy principle; knee joint motion features and ligament elasticity features are analyzed to serve as drive and constraint of the personalized skeleton-ligament-prosthesis three-dimensional point cloud model, and prosthesis parameters are iteratively optimized to solve the contradiction between anatomy and kinematics; establishing a muscle-bone (muscle-bone) model of a personalized prosthesis-knee joint, performing inverse kinematics and finite element coupling simulation, and aiming at minimizing joint load, muscle energy consumption and contact stress, eliminating dynamic contradiction; in combination with intraoperative morphology, kinematics, soft tissue elasticity and other multi-source information, personalized prosthesis assembly scheme optimization and surgical planning optimization are achieved, and knee joint replacement is promoted to be converted from empirical surgery to analytic surgery.

The invention discloses a knee joint replacement prosthesis, and relates to the technical field of medical instruments. The knee joint replacement prosthesis comprises a patella connecting assembly, the patella connecting assembly comprises a patella supporting platform and a supporting rod, and one end of the supporting rod is fixedly connected with the patella supporting platform; the tibia oversleeve is arranged on the supporting rod in a sleeving manner; one end of the medullary cavity handle is fixedly connected with the other end of the supporting rod through a connecting assembly, a separation groove is formed in the other end of the medullary cavity handle, the forming direction of the separation groove is the same as the axial direction of the medullary cavity handle, and the end of the medullary cavity handle is divided into a plurality of elastic sections through the separation groove. The diameter of the end of the medullary cavity handle is variable, the medullary cavity handle can smoothly stretch into the preset position of the medullary cavity, the resilience force generated by deformation of the elastic section can increase the friction force between the medullary cavity handle and the medullary cavity, and therefore the stability of fixation between the medullary cavity handle and the medullary cavity is enhanced; therefore, the knee joint replacement prosthesis improves the stability after the prosthesis is implanted into the bone.

This invention belongs to the field of knee replacement surgery, specifically a pressure balance measuring device for knee replacement surgery, comprising a measuring device body; a base is provided below the measuring device body, and an adjustment and removal mechanism is provided between the measuring device body and the base; the adjustment and removal mechanism includes a fixing plate, which is located at the top of the base; through the design of the adjustment and removal mechanism, the size of the measuring device can be adjusted to accommodate different sizes for installation, solving the problem that existing devices do not have a component for slight height adjustment to accommodate different widths. Because the gaps between different patients' knee joints are different, when measuring, it is necessary to change the measuring device of the same size according to different gaps, resulting in frequent changes of measuring devices of different widths during installation, reducing work efficiency, and improving convenience.

The utility model relates to a kind of knee joint soft tissue tension gap measurers, belong to total knee arthroplasty instrument technical field.Fixed detection plate lower part is connected with the inside of hand-held end body fixedly, tension and gap measuring device one and tension and gap measuring device two lower part are respectively located in hand-held end body, and bottom is fixedly connected with the bottom of fixed detection plate, movable detection plate one and movable detection plate two are respectively connected with the middle part of tension and gap measuring device one and tension and gap measuring device two.Advantage is novel structure, realize the simultaneous measurement to the gap distance of two sides inside and outside of knee joint and soft tissue tension, intraoperative operation is simple, it is convenient to compare the difference of inside and outside gap, and it is not easy to be affected by external influence and cause detection failure or surgical accident, can be sterilized and reused.

The invention discloses a knee joint flexion keeping device for knee joint replacement surgery, which comprises a bottom surface frame, the border of the bottom surface frame is provided with at least one plane for stably placing a triangular prism support, and the bottom surface frame is provided with a plurality of uniformly arranged fixing bumps; the supporting frame is hinged to the bottom face frame, a leg fixing frame is hinged to the other end of the supporting frame, a positioning protruding block is arranged at the tail end of the leg fixing frame, the positioning protruding block is matched with the fixing protruding block in structure, and after the positioning protruding block and the fixing protruding block are fixed in an abutting mode, the three frames form a stable triangular structure. On the basis of improvement of an existing knee joint flexion maintaining device in the prior art, the supporting angle can be adjusted in a large range by arranging the matched protruding block structures between the leg supporting frame and the bottom face frame; when a large angle is needed, the positioning protruding block at the tail end of the leg supporting frame is moved to the side away from the supporting frame and then the angle is increased, and otherwise, the angle is reduced.

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.

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.

The present disclosure provides compositions and methods for preparation of a novel patient-specific entirely biologic living non-knee joint arthroplasty / joint replacement.

The invention belongs to the technical field of medical instruments, and discloses a knee joint replacement training simulation device which comprises a bottom frame assembly, a framework assembly and a plurality of clamping assemblies. The framework assembly comprises a first framework and a second framework, the first framework and the second framework are adjustably connected with the multiple clamping assemblies respectively, the first framework is movably connected to the bottom frame assembly, and the second framework is movably connected to the end, away from the bottom frame assembly, of the first framework. The end, away from the first framework, of the second framework is adjustably connected to the bottom frame assembly. By means of the multiple clamping assemblies adjustably connected to the first framework and the second framework, bone molds of different sizes can be adapted without additionally designing or increasing or decreasing structures; through adjustable connection of the clamping assembly and the frameworks and flexible linkage between the frameworks, adaptive operation is simplified, consumable replacement frequency is reduced, use cost is reduced, simulation demonstration efficiency is improved, and clinical training and scheme display requirements are accurately met.

A magnetic guiding device for knee joint replacement relates to the technical field of medical instruments and is provided with a guide plate, sensors and a magnetic field generator, the sensors are respectively fixed on the guide plate and a bone near a lesion joint, the magnetic field generator generates a magnetic field, and the magnetic field covers the sensors. The sensor transmits the position and direction information of the guide plate in the magnetic field to the computer system, the computer system calculates the relative position of the guide plate and the lesion joint and displays the relative position on a computer screen, and the guide plate image can correspondingly move on the computer screen along with the movement of the guide plate; a doctor moves the guide plate and observes a guide plate image displayed by the computer and a lesion joint image, after the guide plate image and the lesion joint image are aligned and placed in a computer screen, the guide plate is fixed to the bone, and then the interface of the lesion joint and the joint prosthesis is cut out through guide of the guide plate.