36 results about "Anterior cruciate ligament reconstruction" patented technology

An apparatus and method for assembling a soft tissue reconstruction system having first and second anchor assemblies. The apparatus includes a base plate, a first mounting block mounted to the base plate and having a first reference surface against which the first anchor assembly is mountable, a second mounting block slidably mounted to the base plate and having a second reference surface against which a bone anchor of the second anchor assembly is mountable, a measurement bar extending from the second mounting block and slidable relative to the first mounting block, a support block slidably mounted to the measurement bar having a third reference surface for abutting against a tissue presentation surface of the second anchor assembly, and a tensioning device for tensioning a graft attached to the first anchor assembly. Indicia on the measurement bar indicate the proper locations of the reference surfaces and components mounted / abutted thereto.

A device and method to provide a surgically inserted internal tether between the femur and tibia is provided which will prevent distraction of the healing anterior cruciate ligament in all degrees of flexion and extension, at all times. The anterior cruciate ligament tether preserves the four-bar cruciate linkage, critical for normal knee mechanics. In addition, placement of the tether provides bleeding into the knee in the region of the anterior cruciate ligament attachment sites and the consequent inflow of pluripotential cells and healing mediators.

The invention relates to the field of medicine, in particular to an augmented reality operation navigation system for reconstructing anterior cruciate ligament. The system is constituted by augmentedreality glasses, operation navigation software for reconstructing the anterior cruciate ligament, binocular vision, labeling needles, femur joint labels, tibia joint labels, a computer and vision tracking software, wherein the operation navigation software, the binocular vision, labeling needles, femur joint labels, tibia joint labels and the computer are installed on the augmented reality glasses, and the vision tracking software is installed on the computer. Before an operation, diagnosis image CT data and MRI data are subjected to image fusing and division processing, three-dimensional reconstruction is conducted, and a reconstructed three-dimensional model is subjected to pre-operation planning; in the operation, the labeling needles are adopted to collect knee joint dissection joints,the collected knee joint dissection joints and the pre-operation knee joint model are rectified, and according to labeling of the tibia and femur, the knee joint three-dimensional model and a planning path are displayed in real time in the augmented reality glasses. According to the augmented reality operation navigation system for reconstructing the anterior cruciate ligament, precise locating of the starting point and the ending point of the anterior cruciate ligament can be achieved, the problem that an existing endoscope technique operation is narrow in vision is solved, and the operationrisks are effectively lowered.

A guide pin guiding device, for guiding a guide pin when a bone hole for a PLB is prepared in the femur, includes an insertion portion, for being inserted into a bone hole for the AMB prepared in the femur, at one end of an elongate main body thereof. The elongate main body is formed with a guide pin insertion hole for the guide pin to be inserted therein to prepare a bone hole for the PLB in the femur. The guide pin insertion hole is open to the outside of the elongate main body. The guide pin insertion hole includes a guide pin guiding portion and a slot portion extending from the guide pin guiding portion to the side edge of the elongate main body. In addition, a reamer guiding device for guiding a reamer when preparing a bone hole for the PLB in the femur can be used with the guide pin guiding device.

A drill guide for an anterior cruciate ligament reconstruction operation is provided. The drill guide allows a transplantation hole on a tibial bone and a transplantation hole on a femoral bone to be properly positioned without relying upon the experience and sense of the operator. The drill guide for an anterior cruciate ligament reconstruction operation includes a guide member regulating a movement of a drill guide in a direction perpendicular to an axis of the same, a pointing member having a tip part located in a position on an imaginary line extending from an axis of the guide member, and a light beam radiating member radiating a light beam traveling along the imaginary line extending from the axis of the guide member.

A real time visualization method and system for evaluating and monitoring recovery progress of Anterior Cruciate Ligament reconstructed / injured subject is provided. The method includes receiving multiple super-imposed bio-signals from an eletromyogram (EMG) for muscles of limbs of the patient and signals pertaining to three dimensional kinematics measurement from a motion sensor set, processing the signals to extract wavelet features and evaluating the wavelet features to determine the extent of rehabilitation and a recovery classification of the patient's limb from ACL injury. The system includes an input interface circuit, a processing module, a comparator module and an output interface circuit for providing an estimate of the extent of rehabilitation the patient's limb from ACL injury.

The invention discloses an end effector of a robot in anterior cruciate ligament reconstruction. The end effector comprises a linear feed movement component, an operating force measurement component, an electric drill component and a visual feedback component, wherein the linear feed movement component is positioned at the bottom of the end effector; the visual feedback component is connected with the linear feed movement component through screws; the electric drill component is positioned inside the visual feedback component and is connected with the visual feedback component through the operating force measurement component as well as an upper end cover (19) and a lower end cover (16) of an electric drill clamper of the electric drill component; the operating force measurement component is positioned inside the visual feedback component and is connected with the surface of a platform of a lead screw nut part (7) in the linear feed motion component through screws. The end effector disclosed by the invention can finish automatic feed of drilling and accurate control over a pulling force and assist a doctor in finishing surgical operation, so that a surgical effect and safety are improved.

The invention provides an experimental platform for knee joint force loading and biomechanical detection. The experimental platform is mainly composed of seven parts including a frame unit, a femoralpose adjustment unit, a femoral reactivity and ligament strain measurement and force loading unit, a knee joint flexion driving unit, a tibia pose driven unit, a tibia internal and external rotationmeasurement unit, and a patella pose detection unit. The device compares the biomechanical characteristics of the in-vitro knee joint under different surgical techniques by detecting the biomechanicalcharacteristics of the knee joint after surgeries such as total knee replacement, anterior cruciate ligament reconstruction, and posterior cruciate ligament reconstruction.

The invention aims to provide an anterior cruciate ligament reconstruction surgical navigation method and system, and the method comprises the steps: carrying out the three-dimensional reconstruction of a virtual model of an affected part of a patient through a preoperative segmentation and modeling module, and setting a reference point in the virtual model; acquiring real operation scene information, and calculating position coordinates of a marker on a patient through a camera calibration and video acquisition module; carrying out space registration on the virtual model and a real surgical site by utilizing a virtual-real registration technology module, configuring a surgical planning path on a display, and carrying out navigation; and displaying a real surgical imaging result through an imaging and position tracking module, tracking the marker in real time and calculating coordinate information of the marker so as to complete surgical navigation for anterior cruciate ligament reconstruction. The point-to-point registration is adopted to automatically complete the registration of the virtual scene and the real scene, when the registration of the reference point is inaccurate, the registration of the reference point can be manually completed through the position information fed back in real time, and the registration rate is improved.

The invention relates to a fixing device for avulsion fractures of the anterior cruciate ligament (ACL) tibial insertion. The fixing device comprises a fixing plate and multiple fixed lines slidably fixed in the fixing plate. Two ends of each fixed line respectively extend out of the fixing plate from opposite directions. The whole device has a simple structure. The fixing plate and the fixed lines can slide relative to each other. In the implantation process, the position of the fixing plate can be conveniently adjusted. The operation is simple and convenient and facilitates fracture reduction and pressed fixation of the ACL tibial insertion during an operation, thus shortening the time for reduction and fixation surgery of fractures and simplifying the operation. The contact area betweenthe fixing plate and a fracture block is large, and the fixation is firm. No secondary surgery is required to remove a fixture, which reduces operative wounds and improves the quality of the operation. The device of the invention is applicable to various types of avulsion fractures of ACL tibial insertion.

The invention relates to a gait symmetryassessment method used after anterior cruciate ligament reconstruction. The gait symmetryassessment method is characterized by comprising the following steps that 1, plantar pressure data of a sampled individual is acquired, and parsing processing is conducted on the acquired plantar pressure data to obtain symmetry results of plantar pressures on two sidesof the sampled individual under different load-decreasing amplitudes; 2, according to the symmetry results of the plantar pressures on the two sides of the sampled individual under different load-decreasing amplitudes, initial load-decreasing amplitude for load-decreasing running training is determined, and according to assessment results of plantar stress symmetry of the sampled individual in therunning process under the initial load-decreasing amplitude, the load-decreasing amplitude for load-decreasing running training is adjusted until balanced load bearing of the lower limbs on the two sides of the sampled individual under non-weigh-losing condition is achieved. The gait symmetryassessment method can be widely applied to the field of gait symmetryassessment method used after anteriorcruciate ligament reconstruction.

The invention relates to a tunable with posterior cruciate ligament reconstruction tibia positioning device on a dissection force line axis extension cord. The tunable posterior cruciate ligament reconstruction tibia positioning device includes a positioning arm and a handle, the rear end of the positioning arm is fixedly connected with the front end of the handle, a sliding block is arranged on the handle, a locking device for locking the sliding block is arranged on the sliding block, one end of a support rod is fixedly connected with the sliding block, the other end of the support rod is fixedly connected with a guide block, and a guide hole is formed in the guide block; a positioning tip at the front end of the positioning arm inclines to the left or the right, and the axis of the guide hole penetrates through the positioning tip. According to the tunable posterior cruciate ligament reconstruction tibia positioning device on the dissection force line axis extension cord, the positioning tip inclines to the exterior, and therefore the positioning tip can be located on a slope groove on the posterior cruciate ligament dissection force line axis extension cord behind the proximaltibia; meanwhile, the positioning tip deforms along the slope groove, passes through a posterior cruciate ligament stop and arrives at the inner side of the fossa intercondyloidea, an acute angle formed by a transplant and a tibia tunnel is successfully converted into two obtuse angles, pressure on the tibia tunnel and pressure on part of the transplant are reduced, abrasion caused by the edge ofthe tibia tunnel to the transplant is reduced, and a killer turn effect is reduced.

A device for the patient-specific, individual anatomic placement of bore channels when attaching artificial ligaments to bones, namely for use in placing boreholes on the thigh and lower leg during anterior cruciate ligament reconstruction, is provided with a probe (1) to be introduced into a joint via an arthroscopy portal and with a targeting head (2) disposed on the distal end of the probe. The targeting head (2) comprises a targeting template (3) which is produced individually using a 3-D imaging method, in particular 3-D magnetic resonance tomography (3-D-MRT) or 3-D computer tomography (3-D-CT), and which is a negative imprint of the osseous surface relief in the region where the torn ligament attaches to the bone in question, in particular where the cruciate ligament attaches to the thigh or lower leg. The targeting template (3) comprises at least one passage (4) for marking the bore channel that is to be produced on the bone, and a hand grip (7) is provided on the proximal end of the probe (1) for holding and positioning. The invention also relates to a method for producing a corresponding device.

The invention discloses a femur tunnel shifting disk type locator for anterior cruciate ligament reconstruction under an arthroscope. A femur tunnel is located according to the distance and angle between a femur physiological mark point measured before surgery and the position of a femur tunnel which needs establishing. The locator comprises an axis hook rod, a fixing portion, an outwards-rotating shifting disk set and an inwards-rotating shifting disk set, wherein the front end of the axis hook rod is provided with a hook, the fixing portion is used for fixing the axis hook rod, and the outwards-rotating shifting disk set and the inwards-rotating shifting disk set are coaxially mounted on the axis hook rod in a sleeved mode. The inwards-rotating shifting disk set is provided with a pointer. The outwards-rotating shifting disk set is provided with a hollow drill bit guide rod. The pointer and the drill bit guide rod are both parallel to the axis hook rod. The distance between the axis of the drill bit guide rod and the axis of the axis hook rod is equal to the distance between the femur physiological mark point measured before surgery and the position of the femur tunnel which needs establishing. The hook is hooked to the physiological mark point, the inwards-rotating shifting disk set is moved axially to make the pointer point to the top line of femur fossa intercondyloidea, and the outwards-rotating shifting disk set is rotated so that the angle between the inwards-rotating shifting disk set and the outwards-rotating shifting disk set can be equal to the angle between the femur physiological mark point measured before surgery and the position of the femur tunnel which needs establishing.. The femur tunnel shifting disk type locator meets the actual demand for locating according to the angle and distance in anterior cruciate ligament reconstruction surgery, and increases the success rate of the surgery.

A real time visualization method and system for evaluating and monitoring recovery progress of Anterior Cruciate Ligament reconstructed / injured subject is provided. The method includes receiving multiple super-imposed bio-signals from an electromyogram (EMG) for muscles of limbs of the patient and signals pertaining to three dimensional kinematics measurement from a motion sensor set, processing the signals to extract wavelet features and evaluating the wavelet features to determine the extent of rehabilitation and a recovery classification of the patient's limb from ACL injury. The system includes an input interface circuit, a processing module, a comparator module and an output interface circuit for providing an estimate of the extent of rehabilitation the patient's limb from ACL injury.

The invention discloses a lead gauge with a parallel mechanism for anterior cruciate ligament reconstruction. The lead gauge with the parallel mechanism consists of six displacement bar assemblies with identical structures, one lead displacement assembly, one moveable platform assembly and one fixed platform assembly, wherein the six displacement bar assemblies are installed between the moveable platform assembly and the fixed platform assembly, and the lead displacement assembly is installed on the moveable platform assembly. The six displacement bar assemblies respectively adopt cylindricalsurfaces formed by inner / outer envelope, and screw rods are matched with feed screw nuts, thereby not only changing the rotary motion of a motor into the linear displacement of cylindrical slide blocks, but also enabling the structure to be compact. By matching spherical heads arranged at the upper and the lower end parts of the displacement bar assemblies with spherical hinge assemblies on the moveable platform and the fixed platform, the movement of the adjacent displacement bar assemblies can be coordinated.

The invention discloses a fixing system of a transplant in anterior cruciate ligament reconstruction. The fixing system comprises a positioner, a guide needle, a hollow drill bit and an expansion screw, the expansion screw is an absorbable expansion screw and comprises an inner nail and an expansion sleeve, protein factors and nano-hydroxyapatite are combined by an absorption method and then compounded with the polythene levo-propionate by a multiple emulsion method to prepare sustained release microspheres, the protein factors are BMP (bone morphogenetic protein)-2, the expansion sleeve is provided with a first through hole along axial direction, the inner nail is provided with a stepped through hole along the axial direction, the diameter of the first through hole is smaller than the minimum diameter of the stepped through hole, the guide needle is provide with a ladder pattern matched with the first through hole and the stepped through hole, and the positioner is provided with a sleeve for penetrating the guide needle. According to the fixing system of the transplant in anterior cruciate ligament reconstruction, tendon-bone healing is facilitated, high fixing strength can be generated, and the fixing system can overcomes the shortcomings of host immune response cause by ectogenic cells, low conversation efficiency and the like.

The invention provides an experimental platform for knee joint force loading and biomechanical detection. The experimental platform is mainly composed of seven parts including a frame unit, a femoralpose adjustment unit, a femoral reactivity and ligament strain measurement and force loading unit, a knee joint flexion driving unit, a tibia pose driven unit, a tibia internal and external rotationmeasurement unit, and a patella pose detection unit. The device compares the biomechanical characteristics of the in-vitro knee joint under different surgical techniques by detecting the biomechanicalcharacteristics of the knee joint after surgeries such as total knee replacement, anterior cruciate ligament reconstruction, and posterior cruciate ligament reconstruction.

A surgical instrument for use in performing anterior cruciate ligament reconstructions includes an elongate body section having a handle portion for a user to grasp the instrument, and a head section having a curvilinear groove formed therein adapted for receiving and frictionally engaging a guide wire. The head section can include an end portion having a contour anatomically conforming to the femur. The instrument can direct a guide wire to an anatomic position on the femur.

The invention belongs to the field of medical materials, and particularly relates to an implantable ligament substitute material based on oriented carbon nanotube fibers and a preparation method of the implantable ligament substitute material. On the basis of the oriented carbon nanotube fibers, double-helix fibers are obtained through multistage helix of multiple strands of fibers and stress release and serve as the ligament implant material. The tensile modulus of the ligament material is 1.4-4 GPa, the elongation at break is 10-30%, and the ligament material can meet the mechanical requirements of implanted ligaments; and the density is 0.3-0.9 g / cm<3>, and a large number of nano-scale and micron-scale oriented pore channels similar to the structure of the autologous ligament are formed. After a New Zealand rabbit ligament defect model is implanted for 4 weeks through an anterior cruciate ligament reconstruction operation, new bones grow into gaps between ligaments and bone ducts, and 13 weeks later, the new bones are fused into the multi-stage fiber ducts, so that the implanted ligaments and bone tissues are completely integrated. The implantable ligament material can be used for alternative implantation of ligaments of animals such as mice, rabbits, cats, dogs, sheep, pigs and humans.

The invention discloses a ligament stiffness robot in-situ measuring system and method during an anterior cruciate ligament reconstruction surgery. The ligament stiffness robot in-situ measuring system includes a universal six-freedom-degree mechanical arm and an anterior cruciate ligament stiffness measuring device, and on the basis of transformation of space coordinates, the anterior cruciate ligament stiffness measuring device at the tail end of a robot interacts with a reconstructed anterior cruciate ligament in a leg of a patient in real time and laterally measures the stiffness of the reconstructed anterior cruciate ligament. In the past, ligament stiffness measurement is manually conducted by a doctor, and thus certain uncertainties exist. The ligament stiffness robot in-situ measuring system simplifies measurement difficulties for the doctor during the anterior cruciate ligament reconstruction surgery and assists the doctor in surgery operation, human interference factors are reduced, the surgery quality is improved, and implementation and popularization of precision medicine are facilitated.

The invention discloses a visual knee joint cruciate ligament reconstruction method which comprises the steps of data acquisition, coordinate system unification, cruciate ligament spatial coordinate extraction, visual cruciate ligament reconstruction based on images, image measurement and the like. The method is capable of realizing CT (Computed Tomography) and MRI (Magnetic Resonance Imaging) digital fusion, is simple and effective, and is capable of guiding knee join ligament surgery without increasing the burden of patients.

The invention discloses an anterior cruciate ligament reconstructing and converging and transplanted tendon weaving device, and relates to the technical field of transplanted tendon weaving devices. Anterior cruciate ligament can be easily reconstructed, converged and woven. The device comprises a working table and a controller. A transverse slide groove is transversely formed in the upper surface of the working table and internally provided with a transverse slide mechanism. A vertical lifting mechanism with a vertical upward telescopic rod is fixedly arranged on the upper surface of the transverse slide mechanism. A rectangular measurement block is fixedly arranged on the telescopic rod of the vertical lifting mechanism. A front slide groove is longitudinally formed in the upper surface of the working table and in front of the transverse slide groove and internally provided with a longitudinal front slide mechanism. A front supporting column is fixedly arranged on the upper surface of the longitudinal front slide mechanism. The control end of the transverse slide mechanism, the control end of the vertical lifting mechanism, the control end of a longitudinal rear slide mechanism, the control end of the longitudinal front slide mechanism, a first tension sensor and a second tension sensor are connected with the controller.

The invention relates to an analysis method for gait characteristics after anterior cruciate ligament rupture. The method is characterized by comprising the following steps that 1), the three-dimensional kinematic data and plantar pressure data during the normal walking processes of a plurality of ACL rupture patients and normal people are obtained, multiple groups of data are randomly selected asstandard sample data, and the rest of the data is to-be-detected sample data; 2), analysis processing is conducted on the plantar pressure data to extract plantar pressure characteristic parameters;3), analysis processing is conducted on the three-dimensional kinematic data and gait characteristic three-dimensional kinematic characteristic parameters are extracted; 4), training is conducted on the basis of the gait characteristic three-dimensional kinematic characteristic parameters and the plantar pressure characteristic parameters extracted from the standard sample data to obtain an evaluation model, and cluster analysis is conducted taking the gait characteristic three-dimensional kinematic characteristic parameters and the plantar pressure characteristic parameters of the to-be-detected data as input to obtain a cluster analysis result. The method can be extensively applied to the analysis of the gait characteristics after anterior cruciate ligament rupture.

The invention discloses grafted tendon weaving equipment for anterior cruciate ligament reconstruction convergence and relates to the technical field of grafted tendon weaving devices. The equipment can achieve anterior cruciate ligament reconstruction convergence weaving easily and comprises a workbench and a controller, wherein a transverse sliding groove is transversely formed in the upper surface of the workbench, a transverse sliding mechanism is arranged in the transverse sliding groove, a vertical lifting mechanism with a vertically upward telescopic rod is fixedly arranged on the upper surface of the transverse sliding mechanism, and a rectangular measurement block is fixedly arranged on the telescopic rod of the vertical lifting mechanism; a front sliding groove is longitudinally formed in the upper surface of the workbench in front of the transverse sliding groove, a longitudinal front sliding mechanism is arranged in the front sliding groove, and a front support pillar is fixedly arranged on the upper surface of the longitudinal front sliding mechanism; the control end of the transverse sliding mechanism, the control end of the vertical lifting mechanism, the control end of a longitudinal rear sliding mechanism, the control end of the longitudinal front sliding mechanism, a first tension sensor and a second tension sensor are all connected with the controller.