48 results about "Arthroplasty replacement" patented technology

A computer implemented system for adjusting the placement of an implant in a patient through the use of a dimensioned grid template placed relative to patient anatomy on a fluoroscopic machine and a method to digitally quantify alignment parameters is provided. This system can be used for determining: 1) leg length, offset, and cup position during arthroplasty replacement surgery; 2) fracture reduction/correction position during trauma procedures and 3) an apparatus to be used for deformity correction planning is provided; 4) placement and positioning of instruments and implants relative to bone and anatomical architecture; 5) bone anatomy boundary parameter identification relative to reaming and cutting landmarks of bone.

A kit includes a distractor, a plurality of trial elements, and at least one sensor. The distractor is configured to separate a first bone from a second bone by adjusting the distance between a first member and a second member, and is configured to receive at least one sensor in the first portion. Each of the trial elements corresponds to one of a plurality of surgical implants, is configured to be temporarily coupled to the second bone so as to evaluate suitability of the corresponding one of the plurality of surgical implants for implantation, and is configured to receive at least one sensor. The at least one sensor is configured to be received in the distractor or one of the trial elements, and is configured to record a magnitude of a force, a direction of application of a force, a pressure mapping, or a location of application of a force.

The invention provides an ultrasonic apparatus for preventing osteolysis from appearing around a prosthesis after joint replacement. The ultrasonic apparatus is mainly composed of a processor, an ultrasonic generator, an output probe, a display screen, an operation rotary knob, a power supply and an ultrasonic apparatus shell, wherein the processor and the ultrasonic generator are located in the ultrasonic apparatus shell, the processor, the ultrasonic generator and the display screen are connected with the power supply in series, and the ultrasonic generator is connected with the output probe. The ultrasonic apparatus is reasonable in design and convenient to carry, the ultrasonic frequency, the strength, the duty ratio, the working hour span and the area of the output probe can all be adjusted and matched with data bases composed of different parameters combinations, different types of parameter setting can be arranged as required, probes in different sizes can be adopted as required, corresponding low-energy ultrasonic waves are transmitted to the area around the prosthesis, therefore, the osteolysis is prevented from appearing around the prosthesis, reconstruction of bone trabeculas around the prosthesis is promoted, the bone mineral density around the prosthesis is improved, the service life of the prosthesis is prolonged, the ultrasonic apparatus is suitable for different people, no use contraindication exists, no invasive intervention occurs to a user, and the ultrasonic apparatus is relatively safe.

The invention discloses a system and a method for measuring an acetabular anteversion angle and an abduction angle in hip replacement. The system comprises a gypsum binding belt, a reference module, a measuring module, a display module and a hip replacement surgical instrument, wherein the reference module is used for describing the posture of a pelvis reference surface and comprises a reference base, a reference end cover, a switch, a battery and a reference circuit board; a battery mounting hole site, a reference circuit board mounting hole site, a switch fixing groove and a reference end cover fixing hole site are arranged in the reference base; the battery and the reference circuit board can be fixed in the base, the switch can be fixed on the side of the reference base, and the reference end cover is fixed above the reference base to serve as a mounting shell of the reference module. The system has the advantages of low cost, good compatibility, simplicity in installation and convenience in operation, and is suitable for popularization and application in various hospitals.

The invention relates to the field of medical devices, and discloses a straight leg raise training device after knee replacement. The straight leg raise training device comprises a base station, a thigh plate allowing a thigh to set and a calf plate allowing a calf to set, wherein a through hole penetrating through the right end surface is rightwards formed in the rear end of the left end surfaceof the base station; a right rotating shaft is fixed to the rear end of the right end surface of the thigh plate; a right control member which is fixed to the right end surface and used for controlling the right rotating shaft to rotate is connected to the right end which penetrates through the through hole, of the right rotating shaft; and the rear side of the lower end surface of the calf plateis hinged to the front side of the lower end surface of the thigh, and the front end of the right end surface of the calf plate is in sliding connection to the left end surface of the base station inthe front-and-rear direction. Compared with the prior art, the purpose of raising the limbs of the patient according to angles based on the actual condition of the patient, can be achieved.

The invention relates to the technical field of distraction devices in knee joint replacement, in particular to a distraction device in knee joint replacement, which comprises distraction structures,a transmission structure, telescopic structures, a supporting structure, a driving structure and a limiting structure, wherein the supporting structure is arranged at the bottom end of a driving structure used for manual driving, the transmission structure is arranged in the supporting structure in a rotating connection mode, and the transmission structure is connected to the driving structure. The two ends of the transmission structure are connected to the telescopic structures used for adjusting the distraction distance, and the telescopic structures are connected to the supporting structure. Distraction structures used for distracting are arranged at the opposite ends of the two telescopic structures. The telescopic structures are matched with the supporting structure, so that the spaceutilization efficiency is improved; the driving structure drives the transmission structure conveniently, so that the transmission structure drives the two telescopic structures to adjust the distance between the two distraction structures, the distraction distance of the femur is adjusted conveniently, the operation flexibility is greatly improved, operation of medical staff is facilitated, andmeanwhile the structure is more stable.

The invention provides a motion shaft positioner for artificial knee joint replacement, which comprises two spoon arms and a connecting body, the two spoon arms can be placed between a near-end tibia and a remote femur, and the near-end tibia and the remote femur are restrained by ligaments, so that the inner condyle and the outer condyle of the femur are respectively clamped and propped against the two spoon arms on a tibial plateau at corresponding curvatures; the connecting body naturally positions a reference axis according to the positions where the two spoon arms are clamped and abutted, the reference axis is approximately parallel to the movement axis of relative pivoting of the medial condyle and the lateral condyle on the tibial plateau, and articular surface finishing between the proximal tibia and the remote femur is performed according to the reference axis, so that the device is formed.

The invention discloses an anteversion angle and abduction angle positioning and guiding device in hip replacement. The anteversion angle and abduction angle positioning and guiding device comprises apelvis sagittal plane positioning device, a pelvis cross section positioning device, a fixing device and a guiding device. A projection surface of a coronal plane of the pelvis is indirectly positioned by positioning the sagittal plane and the cross section of the pelvis and through a mutual vertical relationship among the sagittal plane, the cross section and the coronal plane. An anteversion angle and an abduction angle of an acetabular cup can be directly obtained in an operation, a result is intuitive and easy to obtain, and the device is easy and convenient to operate, greatly shortens operation time, and improves the angle positioning accuracy of the acetabular cup and the success rate of the hip replacement.

The invention discloses a guiding knocking cap and a knocking device for joint replacement. Radial component force is effectively reduced in the force transmission process from the knocking cap to a knocking rod. The knocking cap comprises a knocking part, a pressure spring sleeve, a steel ball, a steel ball sleeve, a first spring, an impact rod, a buffering sleeve at least comprising a second spring and a flange end cover. The impact rod comprises a head part and a rod part. The second spring sleeves the periphery of the rod part and penetrates through the hollow hole part of the knocking part together with the rod part. The far end of the second spring abuts against the steel ball sleeve, and the near end of the second spring abuts against the head of the impact rod. The flange end cover is fixedly installed on the knocking part. In the initial state, the head part is far away from the knocking part towards the near side under the pre-tightening bias force of the second spring, and a flange part formed on the outer periphery of the head part is limited by a stop part of the flange end cover. After the head of the impact rod is knocked for the first time, the rod part knocks the knocking rod for the second time to achieve instantaneous impact force, and the knocking rod is driven to advance to complete installation of the acetabular cup. Meanwhile, the radial component force is buffered through elastic deformation of the second spring.

The invention relates to a knee joint replacement postoperative fixing and pressurizing training belt which comprises a leg binding belt and an elastic telescopic belt. A sole fixing part is arrangedat the lower end of the elastic telescopic belt, and the upper end of the elastic telescopic belt is connected with the leg binding belt through a quick detaching buckle. The leg binding belts are provided with Velcro elastic belts, and the tightness can be adjusted according to the sizes of legs. A heel supporting part connected to the heel supporting part is further arranged and used for supporting the heel and preventing bedsores. A sand strip can be placed in the storage bag part for pressurization or ice bag cold compress, and rehabilitation is accelerated. The belt is simple in structure, convenient and comfortable to use, free of assistance of other people, multifunctional and capable of comprehensively meeting the requirements for position management of postoperative hyperextensionstress and operative limb rehabilitation training at a time.

The invention discloses a tendon suturing system for joint replacement, which comprises a joint prosthesis, a suturing instrument, a locking structure and a bone setting thread system, wherein the joint prosthesis is provided with an outer convex surface, and a mounting groove is formed in the outer convex surface; the stitching instrument is provided with a first end and a second end, a stitchinghole is formed in the first end, and the shape of the second end is matched with that of the mounting groove, so that the second end can be embedded into the mounting groove; the locking structure isused for fixing the stitching instrument on the joint prosthesis without loosening; and the bone setting thread system is used for fixing the joint prosthesis to an external backbone. The stitching instrument and the joint prosthesis can be effectively combined, the combined assembly body is fixed on the joint backbone, and meanwhile, the tendon continuity of a wounded part is smoothly guaranteed, so that the postoperative tendon rehabilitation is facilitated, and the postoperative tendon is not displaced. The tendon suturing system is used in the joint replacement.