223 results about "Ligament" patented technology

The invention provides an intelligent wearable rehabilitation monitoring and evaluation device after anterior cruciate ligament injury, and relates to the technical field of exercise rehabilitation and intelligent medical monitoring, the device comprises a sensor acquisition module, a signal processing module, a compensation determination module, a difference determination module and an evaluation analysis module, a force-electricity coupling flexible sensor, an IMU and a pressure sensor, the method comprises the following steps: synchronously collecting a muscle force signal, a surface electromyogram signal, an attitude signal and a plantar pressure signal at the same position, performing dynamic filtering, confidence enhancement and personalized compensation processing, extracting a difference feature vector, inputting the difference feature vector into a muscle force prediction model, and outputting a quantitative evaluation result. The portable wearable long-term dynamic monitoring is realized, the core indexes of muscles, joints and gaits are covered in multiple dimensions, the assessment is accurate and real-time, the rehabilitation scheme can be optimized, the risk of re-injury is reduced, and the rehabilitation effect and compliance of a patient are improved.

The invention discloses a spiral reinforced composite structure artificial ligament with a bundle characteristic and a preparation method thereof, and belongs to the technical field of biomedical materials. The artificial ligament is of a composite structure, is composed of a plurality of units and has a bundle-shaped characteristic. When the artificial ligament is stretched in the axial direction, the negative Poisson's ratio effect is achieved in the direction perpendicular to the axial direction. The structure of each unit is a spiral reinforced knitted structure and is prepared and formed by adopting a textile technology. The artificial ligament is formed by weaving a medical-grade fiber material or a surface-modified fiber material with biocompatibility. The physical characteristics such as the size, the surface roughness, the surface mesh size, the tensile mechanical behavior and the rigidity of the artificial ligament can be regulated and controlled through the design of a textile weave structure and process parameters. The physical performance of the artificial ligament can be regulated and controlled by changing the preparation process, tissue growth is better promoted so as to be better combined with a marrow tract interface, and the nonlinear stretching mechanical behavior of a natural ligament under the stress working condition is simulated.

The present disclosure relates to systems and methods for anatomical and injury modeling. A system can process multimedia and sensor data collected during various anatomical tests, such as mobility tests and muscle, ligament, or tendon assessments, performed by a user. By applying this data to neural network models, the system can generate anatomy scores and subscores for specific body regions, identifying potential vulnerabilities in the anatomy of the user. The system can further generate a personalized conditioning protocol to address these vulnerabilities and reducing the likelihood of injury.

A disposable, sterile guide constructed of medically-acceptable plastic used for compartmentalizing and therefore protecting the ligament or fascia during three different orthopedic surgical procedures: ECTR, ECuTR, and EPFR. This device reduces the risk of damage to any other part of the surrounding anatomy. The device is disposable and packaged so as to be sterile and therefore readily usable by the surgeon means that it can reduce the risk of infection and is a less expensive alternative to traditional non-disposable, metal instruments that must be sterilized prior to each procedure.

The utility model discloses a ligament tissue cutting tool. The ligament tissue cutting tool comprises a fixing device and a cutting device, the fixing device comprises a base which is provided with at least one rectangular block capable of sliding and is used for fixing a sample; the supporting device is arranged around the base and used for providing supporting and stability; the two grooves are formed in the top of the supporting device and used for receiving and fixing additional components or tools; the cutting device comprises a top part, two ends of the top part are provided with protruding parts, and the protruding parts are used for assembly connection; and the multiple blades are arranged in parallel, and each blade is perpendicular to the top of the cutting device and used for cutting the sample. The ligament tissue can be simply and conveniently fixed by the tool, and the ligament tissue can be cut into uniform fragment tissues with proper sizes, so that the ligament tissue is favorably digested in follow-up ligament cells.

The invention provides a preoperative planning method for ligament reconstruction operation based on multi-modal data. The preoperative planning method of the ligament reconstruction operation based on the multi-modal data comprises the following steps: acquiring joint medical images of multiple modals of an operation site, and performing registration and fusion processing on the acquired joint medical images of multiple modals to obtain a joint medical image multi-modal fusion result; performing segmentation processing according to the joint medical image multi-modal fusion result to obtain a joint segmentation result; performing key point detection according to the joint segmentation result to obtain a key point detection result; according to the key point detection result, a ligament reconstruction preoperative planning scheme is generated.

The customized artificial meniscus prosthesis comprises a meniscus body, a joint cotyle is arranged in the middle of the meniscus body, a meniscus joint protrusion capable of simulating the shape and the movement track of a meniscus is installed in the joint cotyle, and a center nail is fixedly connected to the top of the meniscus joint protrusion. The free end of the center nail extends out of the lunar bone body and is arranged in a head-shaped bone of the wrist of the human body, and a plurality of sets of ligament suture holes are further formed in the back side of the lunar bone body. The customized artificial lunar bone prosthesis provided by the invention aims to be applied to lunar bone replacement surgery, mainly aims at treating advanced lunar bone ischemic necrosis caused by non-traumatic or traumatic factors, and is beneficial to improving the stability of the prosthesis and improving the joint activity; basic biomechanics and clinical experiment research verify that the prosthesis has good mechanical properties and clinical curative effects, promote development of the lunar bone prosthesis, enable more patients to retain wrist joint movement, create more values for society and families, and contribute to achieving the goal of healthy China.

The invention discloses a crown cutting and traction integrated tool for impacted teeth with inferior alveolar nerve injury risk, which utilizes a telescopic part made of a hydrogel material, has reversible performance of water absorption expansion and dehydration contraction, can realize micro-amplitude reciprocating deformation under the natural water environment change of an oral cavity or humidity control adjustment, and can be used for preventing and treating the impacted teeth with the inferior alveolar nerve injury risk. Therefore, slight stress stimulation in alternating directions is continuously applied to impacted teeth after traction is completed, periodontal ligament activity and an open state of a traction channel are maintained through reciprocating small force action, bridging hard connection between tooth roots and bone tissues is effectively prevented, initial resistance of second-time traction is remarkably reduced, and the secondary traction effect of the impacted teeth is improved. The operation risk of breaking through adhesion tissues again in clinic is reduced, the postoperative nerve traction complications and the tooth root absorption probability are further reduced, and the safety and efficiency of the whole treatment process are improved.

A composition and methods of making or use thereof include a plurality of fibers forming a shape for augmenting tendon to bone repair. The physical presence of the plurality of fibers provides initial fixation, while the use of an osteoinductive material provides long term enhancement of bone formation around the site of the tendon to bone repair.

The application discloses a chiral negative Poisson's ratio single cell structure with variable ligament thickness and a honeycomb structure, and belongs to the technical field of structural mechanics. The single cell structure comprises a central body and N ligaments distributed in a circumferential array around the central body, wherein N is greater than or equal to 3. Each ligament has a first side surface and a second side surface parallel to the central axis of the central body, and the profile lines of the first side surface and the second side surface are constructed by NURBS curves. The application uses NURBS curves to construct the boundary, so that the ligament has the characteristics of curved configuration and variable thickness, the structure form of the ligament can be flexibly regulated, the structure layout of the chiral negative Poisson's ratio structure is more flexible, the mechanical properties such as the structure strength can be flexibly adjusted according to different application scenarios, and the demand for the complexity and customization of the mechanical properties of the chiral negative Poisson's ratio structure in actual engineering can be met.

Described herein are methods for repairing tissues (e.g., a meniscus, anterior cruciate ligament, rotator cuff, etc.) using collagen implants suitable. For example, the collagen implants are injected into a repair site to heal the tissue. Further described are collagen slurries, injectable collagen implants and methods of preparation thereof.

The application provides a kind of extrusion nail and its assembly for orthopedics, which is applied to the technical field of orthopedic surgical instruments.The extrusion nail adopts a threadless structure and is composed of a nail body, a barb and an extrusion groove, and can be adapted to different length bone tunnels through the head-to-tail matching of multiple nails.The assembly includes an execution end and an impact handle, which can provide linear impact force to realize the linear implantation of the extrusion nail.The application replaces the rotary screwing with linear advancement, fundamentally avoiding the shearing and torsional injury of ligaments, and has the advantages of precise implantation, convenient operation and stable fixation, which meets the clinical needs of orthopedic ligament reconstruction surgery and improves the safety of surgery and the quality of postoperative healing.

The invention discloses a hook knife for collateral ligaments, and relates to the technical field of medical instruments, the hook knife comprises a handle, the front side of the handle is fixedly connected with a connecting rod, the front end of the connecting rod is provided with a movable groove, and the movable groove is internally provided with a knife body assembly for cutting and separating the ligaments; meanwhile, the cutter body assembly is provided with a cutter body in a left cutter form and a cutter body in a right cutter form. According to the hook knife for the lateral auxiliary ligament, when the adjusting frame moves, the limiting blocks on the sides of the adjusting frame can slide along the limiting grooves in the inner sides of the auxiliary grooves, the limiting blocks can be extruded by the inner walls of the limiting grooves, and therefore the two sides of the adjusting frame can generate slight elastic deformation; the limiting blocks can be clamped into the corresponding limiting grooves under the elastic effect of the adjusting frame, so that the position of the adjusting frame is preliminarily limited, it is guaranteed that the left knife and the right knife can be stably kept in the current cutting state, the situation that the positions of the knives are changed due to accidental touch in the surgical operation is avoided, and the cutting precision is guaranteed.

The present invention relates to a method (1200) and an apparatus for monitoring stresses in a steel ligament within a flexible pipe. The method comprises: subjecting (1202) a ligament to a first magnetic field and obtaining a first measurement indicative of a magnetic flux density near an outer surface of the tube adjacent the ligament; and subjecting (1204) the ligament to a second magnetic field and obtaining a second measurement indicative of the magnetic flux density near the outer surface of the tube adjacent the ligament. The first magnetic field comprises an alternating magnetic field, and wherein the second magnetic field comprises a combination of the alternating magnetic field and a static magnetic field. The method further comprises comparing (1205) the first measurement and the second measurement, and evaluating (1209) stress in the ligament from the comparison of the first measurement and the second measurement.

The invention relates to a medical instrument, in particular to a femoral tunnel guiding and positioning device for anterior cruciate ligament reconstruction, which comprises a transverse moving support, a fixing bolt I, a vertical moving support and a fixing bolt II, the transverse moving support is slidably mounted on a sickbed, the vertical moving support is slidably connected onto the transverse moving support, and the fixing bolt II is slidably connected onto the vertical moving support. The lower portion of the transverse moving support is in threaded connection with a first fixing bolt used for fixing the transverse moving support, and the upper portion of the transverse moving support is in threaded connection with a second fixing bolt used for fixing the vertical moving support. During operation, an arc-shaped guide rail and a second sliding block are arranged to assist in trepanning, trepanning can be guided through a through hole in the second sliding block only by controlling the second sliding block to move during trepanning, the operation difficulty is lower, the through hole is formed for guiding during trepanning, the deviation of the trepanning position is avoided, and the trepanning efficiency is improved. And potential safety hazards in the operation process are reduced.

Some embodiments provide a soft tissue device, such as a transverse carpal ligament cutting device having one or more balloons that are deflated when the device is in an inactive position and are inflated when the device is in an active position. Other embodiments provide a soft tissue cutting method, such as a method of cutting a transverse carpal ligament that uses a soft tissue cutting device.

The present disclosure relates to systems and methods for treatment using syndesmosis fixation. More specifically, syndesmosis fixation is provided with physical features produced from a citrate-based composite biomaterial to aid in healing of the syndesmotic ligament.

The invention discloses a facial ligament lifting method, which comprises the following steps of S1, accurately marking a subcutaneous attachment end or a body surface projection area corresponding to a target facial ligament on the surface of facial skin on the basis of facial anatomical positioning and anatomical walking of the target facial ligament, so that the subcutaneous attachment end or the body surface projection area corresponding to the target facial ligament is accurately marked on the basis of facial anatomical positioning; acting force is accurately focused on the target ligament through a special instrument, and surrounding tissue is prevented from being damaged. The whole process is only operated on the skin surface, no incision or implantation is needed, surgical wounds and wire foreign matter risks are thoroughly avoided, the composite force can be effectively conducted to the deep ligament to enable the deep ligament to generate controllable folding deformation, stable fixation is achieved through a subsequent biological healing mechanism, ligament relaxation is fundamentally improved, the effect is more natural and lasting, and the application range is wide. Due to the fact that skin breaking is not needed and energy is controllable, the operation safety is greatly improved, and dynamically-adjusted mechanics and selectable hot-cold collaborative procedures aim at optimizing experience and ensuring the comfort degree of the process.

The utility model relates to the technical field of medical instruments, in particular to a positioning device for assisting reduction and fixing acromioclavicular dislocation, which comprises a base plate, an acromion end positioning plate is arranged at one end of the base plate, and a clavicle end positioning block is arranged at the other end of the base plate. Holes are formed in the acromion end positioning plate, acromion end fixing guide needle sleeves are fixedly connected to the positions corresponding to the holes, a plurality of holes are formed in the base plate, and a first coracoshoulder ligament fixing guide needle sleeve, a second coracoshoulder ligament fixing guide needle sleeve and a clavicle end guide needle fixing sleeve are fixedly connected to the positions corresponding to the holes respectively. The positioning device can achieve accurate positioning, damage to blood vessels, nerve tracts and surrounding tissues below the coracoid process is avoided, and operation bleeding is reduced. Due to the fact that the individualized bone tunnel is established, the position where the belt carrier titanium plate is placed is appropriate, the osteolysis phenomenon is reduced, and meanwhile the risk of coracoid fracture is reduced. According to the operation method adopting the positioning device, the operation difficulty is remarkably reduced, the operation time is shortened, and the learning curve of young physicians is reduced.

The invention relates to the technical field of medical instruments, in particular to an internal fixing structure for posterior cruciate ligament tibia dead center fractures, which comprises a tail plate, a plurality of movable screw holes are formed in the front side of the tail plate in a penetrating manner, a plurality of locking screw holes are formed in the rear side of the tail plate in a penetrating manner, and two head plates are fixedly mounted at the front end of the tail plate. A notch is formed between the two head plates, a plurality of fixing screw holes are formed in the surfaces of the head plates in a penetrating mode, sliding grooves are formed in the positions, close to the edges, of the left side and the right side of each head plate, and deformable needles formed in a bent mode are arranged in the sliding grooves. By dissecting the attached head and tail plate structures, adopting an encircling type fixing mode and adopting the combined design of the adjustable deformable needles and multiple types of screw holes, multi-angle, dispersive and pressurized stable fixing of the tibia dead center fracture blocks is achieved, and ligament protection and operation flexibility are taken into account while the fixing strength and stability are improved.

The utility model discloses a reverse drilling device for ligament reconstruction and repair operation, which relates to the field of medical auxiliary instruments and comprises a handheld component, a drilling component, a drilling component and a drilling component. The bone drilling assembly comprises a connecting shaft, a connecting frame, an adjusting assembly, a rotating shaft, a push rod, a connecting rod and a drill bit; wherein the two ends of the rotating shaft penetrate through the connecting frame and extend into the sliding grooves, the adjusting assembly is arranged in the connecting frame and fixedly connected with the rotating shaft, the connecting shaft is inserted into the front end of the handheld assembly and connected with the connecting frame, and the push rod is inserted into the rear end of the handheld assembly in a sliding mode and connected with the adjusting wheel. The bone drilling assembly is divided into three parts which are installed at the front end, the inner portion and the rear end of the handheld assembly respectively, the rotating shaft drives the push rod arranged behind the handheld assembly to slide and stretch out and draw back through the connecting frame, the drill bit is made to be away from the cross section of the bone, the drill bit recycling space is reserved, and secondary damage to the bone due to drill bit recycling is prevented.

The invention relates to the technical field of ligament simulation analysis, and discloses a ligament dynamic simulation and isometric analysis system. A dynamic data acquisition module of the system obtains three-dimensional deformation data and real-time stress data of a ligament in the movement process, and a ligament dynamic response database is established; the finite element grid division module generates a self-adaptive variable density grid according to ligament anatomical structure features, and maps dynamic response data to grid nodes; the real-time solving module performs time domain iterative calculation based on an explicit dynamics algorithm, and outputs stress field distribution and strain energy density under different motion phases; the isometric analysis module extracts a length change sequence and calculates a length change rate and a tension balance coefficient; the damage risk assessment module generates a micro-damage probability map according to the strain energy density peak value and the tension balance coefficient deviation threshold value, and can accurately analyze the dynamic mechanical behavior of the ligament and assess the damage risk.

The utility model discloses a customized artificial lunar bone prosthesis which comprises a lunar bone body, a joint cotyle is arranged in the middle of the lunar bone body, a head-moon joint protrusion capable of simulating the form and the movement track of a head-moon bone is installed in the joint cotyle, and the top of the head-moon joint protrusion is fixedly connected with a center nail. The free end of the center nail extends out of the lunar bone body and is arranged in a head-shaped bone of the wrist of the human body, and a plurality of sets of ligament suture holes are further formed in the back side of the lunar bone body. The customized artificial lunar bone prosthesis provided by the utility model aims to be applied to lunar bone replacement surgery, mainly aims to treat advanced lunar bone ischemic necrosis caused by non-traumatic or traumatic factors, and is beneficial to improving the stability of the prosthesis and improving the joint movement; basic biomechanics and clinical experiment research verify that the prosthesis has good mechanical properties and clinical curative effects, promote development of the lunar bone prosthesis, enable more patients to retain wrist joint movement, create more values for society and families, and contribute to achieving the goal of healthy China.

This invention relates to the field of artificial joint prosthesis technology, and discloses an anatomical femoral condyle knee joint prosthesis that does not preserve the cruciate ligament. The prosthesis includes a femoral condyle, a tibial plateau pad, and a tibial plateau support. The femoral condyle comprises a medial condyle and a lateral condyle. The medial and lateral condyles, in lateral view, respectively form medial condyle curve contours and lateral condyle curve contours. The medial condyle curve contour is located lateral to the lateral condyle curve contour, and the movement trajectory length of the medial condyle curve contour is 15%-25% longer than that of the lateral condyle curve contour. The tibial plateau pad has medial condyle curved grooves and lateral condyle curved grooves that respectively conform to the medial and lateral condyles. The slope of the medial condyle curved groove is greater than that of the lateral condyle curved groove. This invention provides an anatomical femoral condyle knee joint prosthesis that does not preserve the cruciate ligament, solving the problem of poor compatibility between existing prostheses and surrounding tissues after implantation.

Described herein are methods for preparing collagen slurries and collagen implants suitable for injection into a repair site to repair a tissue, for example, an anterior cruciate ligament, rotator cuff tendon, and / or a meniscus. Further described are slurries and implants prepared by such methods.

The invention belongs to the technical field of medical instruments, and relates to an auxiliary surgical instrument for arthroscopic treatment of carpal tunnel syndrome, which comprises a cannula, a tail cap connected with the cannula and a slotting structure arranged on the back of the middle section of the cannula. The cannula is used for forming a continuous tissue isolation channel in the carpal canal, the tail cap is used for achieving stable connection of the arthroscope and the cannula and keeping the axis consistent, and the open groove corresponds to the area where the transverse ligament of the carpal canal is located after the instrument is positioned and is used for forming a controlled local operation window. Through cooperation of the cannula, the tail cap and the open groove in spatial position and function, the arthroscope view, the tissue protection area and the surgical operation window form a stable whole, and on the premise that the cannula continuously isolates and protects tissue in the carpal canal, visual and directional release of the transverse ligament is achieved. The arthroscope device is simple in structure, controllable in operation, beneficial for improving operation safety and stability and suitable for arthroscope treatment of the carpal tunnel syndrome.

The invention discloses a visual sacrospinous ligament stitching instrument which comprises a positioning component and at least two control components. The control part is provided with supporting ends, and a puncture needle is mounted at one supporting end; the two control parts are movably connected with each other, so that the two supporting ends can be close to or far away from each other, and the puncture needle is driven to puncture or withdraw from the sacrospinous ligament; in the two control parts which work cooperatively, at least one control part is movably connected with a positioning part so as to follow the corresponding control part to get close to or get away from the other control part which works cooperatively, and the sacrospinous ligament is positioned; when the supporting ends at the two ends are close to the sacrospinous ligament, the positioning component firstly abuts against the sacrospinous ligament and cooperates with the other control component to clamp the sacrospinous ligament, and in the process that the supporting ends at the two ends continue to be close to the sacrospinous ligament, the control component moves relative to the positioning component movably connected with the control component. By means of the ligament fixing device, ligaments can be fixed during puncture suturing, and the slippage phenomenon is reduced.

This utility model provides a ligament traction and cutting tool, relating to the medical field. It includes a hollow support cylinder and a rotating winch movably mounted on the hollow support cylinder. The bottom end of the hollow support cylinder has positioning teeth, and the top end forms two support grooves for mounting the rotating winch. The rotating winch includes a first rotating handle and a second rotating handle that rotate synchronously. The first and second rotating handles are connected by a winding rod, which has a hole for the ligament connecting wire to pass through. Compared with existing technologies, this ligament traction and cutting tool allows the rotating winch to be mounted on the hollow support cylinder. By rotating the handles and the winding rod, the artificial ligament is pulled out, and then a cutter extends into the hollow support cylinder to cut it. This achieves labor-saving ligament traction, controllable progress, and easy ligament cutting.