65 results about "Total knee arthroplasty" patented technology

The present invention relates to a system for determining the angle of osteotomy. The system comprises a plurality of liners, a pressure measurement apparatus and a processing module. Each liner comprises a liner body having an upper surface and a lower surface. A longitudinal distance between a slope region of each upper surface and a planar region of the upper surface gradually increases from a position near the geometric symmetry central axis of the liner to both sides of the liner, so as to define the degree of a tilt angle. The pressure measurement apparatus is used for measuring a pressure applied by each of two extremity sides of a bone joint, so as to determine a pressure difference value. The processing module is configured to determine an angle of osteotomy for the extremity sides on the basis of the tilt angles of the liners that balance the tension of the two extremity sides. The present invention restores the tension condition in a real working state of a joint before osteotomy and takes into account the balance state of the tension of soft tissue as a consideration for the angle of osteotomy, thereby effectively solving the problem of unbalanced tension between soft tissue at the inner and the outer sides of knee joints after total knee arthroplasty, and keeping the original mechanical performance of knee joints of patients after surgery.

A device is used to treat periprosthetic fractures, such as a fracture below the stem of a total hip replacement (THR). The device includes a clamp that is fixed to the exposed stem of the THR and a coupling, such as a morse taper, extending distally away from the stem. A post is inserted into the canal of the distal femur below the fracture. The post has a coupling extending proximally away from the distal femur. The couplings on the clamp and post are joined to create a stable connection between the patient's hip and distal femur. Instead of connecting the clamp with the post directly, one or more adapters may be provided to adjust the length and angulation of the treated limb. The device may also connect a THR stem with a Total Knee Arthroplasty (TKA) that includes a stem.

The present disclosure provides alert implants that comprise a medical device and an implantable reporting processor (IRP), where one example of such a medical device includes a component for a total knee arthroplasty (TKA) such as a tibial extension, a femoral component for hip replacements, a breast implant, a distal rod for arm or leg breakage repair, a scoliosis rod, a dynamic hip screw, a spinal interbody spacer, and tooling and methods that may be used to form the alert implant, and uses of such alert implants in the health maintenance of patients who receive the implant.

A surgical device is provided includes a hand-held portion with a working portion movably coupled to the hand-held portion for driving a tool. Actuators are provided for moving the working portion with each of the actuators having a travel range. An indicator notices a user when at least one of actuators is: (i) within the travel range; (ii) approaching a travel limit of the travel range; or (iii) outside the travel range. A surgical system is also provided inclusive the surgical device and a computing system configured to activate the indicator.

The invention provides a TKA postoperative lower limb three-dimensional force line assessment method and system based on multi-modal data fusion and a computer readable storage medium. The TKA post-operation lower limb three-dimensional force line evaluation method based on multi-modal data fusion comprises the following steps: acquiring double lower limb CT images of a patient before total knee arthroplasty; wherein the coverage range of the two lower limbs is from the upper part of the hip joint to the lower part of the ankle joint; performing three-dimensional reconstruction on the double-lower-limb CT image to clearly display each skeleton and surrounding soft tissue structure of the lower limbs; a biplane lower limb full-length X-ray acquisition system is utilized to acquire normal position and lateral position X-ray images of two lower limbs of a patient at a load-bearing position, and the space relation between skeletons and prostheses of the lower limbs in the load-bearing state is determined; and performing fusion analysis on CT reconstruction data and data acquired by a biplane lower limb full-length X-ray acquisition system to form a fusion image in a three-dimensional space, and accurately calculating angles of a thighbone prosthesis, a tibia prosthesis and a lower limb force line in the three-dimensional space after the TKA operation.

Disclosed is an innovation in the manner of surgically exposing the knee during total or partial knee arthroplasty, because currently, and as it has always been the case, the conventional surgical approach for the knee used the anterior route but also the medial route, where it was necessary to sever the whole tissue attachment of the inner bone border thereof, said tissue attachment comprising the capsule (envelope), the medial patellofemoral ligament and the tendon of the vastus medialis oblique (muscle) of the quadriceps. The present invention relates in particular to operating equipment intended to facilitate and / or implement a new and innovative surgical approach.

The invention relates to the technical field of medical instruments, in particular to an intelligent stepped release tourniquet and method for total knee arthroplasty, comprising a main controller, an actuator and sensor array, a software and algorithm system and a control panel; the main controller is electrically connected with the actuator and sensor array, the software and algorithm system and the control panel. The software and algorithm system is further electrically connected with the actuator and sensor array. The main controller comprises a main control chip, a communication module, a data storage module and a power management module, the main control chip is used for processing and controlling the overall work of the tourniquet, the communication module is used for transmitting data with external equipment, and the data storage module is used for recording tourniquet use data and patient information; the power management module is used for guaranteeing stable power supply of the tourniquet.

A method to facilitate a robotic total knee arthroplasty includes performing a plurality of femoral cuts on a femur, the performing the plurality of femoral cuts including performing a distal femoral cut of the plurality of femoral cuts, performing an anterior femoral cut of the plurality of femoral cuts, performing an anterior chamfer cut of the plurality of femoral cuts after the performing the distal femoral cut and the performing the anterior femoral cut, and performing a posterior femoral cut of the plurality of femoral cuts after performing all other femoral cuts of the plurality of femoral cuts. The method further includes performing at least one tibial cut on a tibia after the performing the plurality of femoral cuts on the femur.

The present application provides a total knee arthroplasty robot auxiliary system, a control method, electronic device and a computer readable medium. The auxiliary system comprises: a preoperative planning system configured to formulate a preoperative plan, preoperative plan data including a knee joint image; an intraoperative planning system configured to formulate an intraoperative plan, wherein the knee joint image in the preoperative plan and a knee joint surface contour of the patient determined in an operation are subjected to image registration, knee joint dynamic spacing force line data at a continuous flexion-extension angle is acquired, a dynamic spacing force line data graph is visually displayed, and a prosthesis plan is adjusted according to the visual display of the dynamic spacing force line data graph to obtain the intraoperative plan; and an executing system, wherein a bone-cutting guide mounted at an operating end of a mechanical arm of a surgical robot is guided to be located in a planned predetermined position according to the intraoperative plan, and the bone-cutting guide is configured to locate a bone-cutting saw.

An implant type or a process of implant fixation is automatically identified by processing surgical plan information. Further, bone mineral density information associated with a patient is determined by processing at least one image. The determined bone mineral density information and patient information representing at least demographics associated with the patient are processed, and a selection of a plurality of patients that previously underwent arthroplasty is made. Outcome information representing results of arthroplasty procedures is processed and a threshold is established representing a biomechanical tolerance. The bone mineral density information is processed to be determined associated with the patient is determined to be above or below the threshold.

An implant type or a process of implant fixation is automatically identified by processing surgical plan information. Further, bone mineral density information associated with a patient is determined by processing at least one image. The determined bone mineral density information and patient information representing at least demographics associated with the patient are processed, and a selection of a plurality of patients that previously underwent arthroplasty is made. Outcome information representing results of arthroplasty procedures is processed and a threshold is established representing a biomechanical tolerance. The bone mineral density information is processed to be determined associated with the patient is determined to be above or below the threshold.

A system for balancing a knee of a patient includes a force measurement device configured to measure forces between a femoral bone and a tibia bone as a force is applied to the knee and a computing system configured to determine a separation distance between a point or region associated with the femur and a point or region associated with tibia based on force information from the force measurement device. The force measurement device may include at least one paddle configured for placement between the femur and tibia and including at least one force sensing element for sensing forces associated with the femur or tibia. The computing system may be configured to normalize a measured force and identify the separation distance based on the normalized force, wherein the identified separation distance is substantially the same over a range of forces measured by the force measurement device.

A surgical instrument system for use in a total knee arthroplasty includes a reference block that is attachable to a femur. The reference block has a block front side and a block rear side lying opposite the block front side. At least one compensation element has an element rear side and, lying opposite along the proximal-distal axis, a contact face for contacting a lateral condyle and / or medial condyle. A connection system has at least one connection portion on the reference block. At least one complementary connection portion is disposed on the compensation element. The connection system is configured to releasably attach the compensation element on the block front side. The compensation element in the attached state does not completely cover the block front side. The connection system is configured so that the compensation element is attachable in different positions on the block front side by the connection system.

1. The name of the design product: knee joint surgery gasket. 2. The use of the design product: gasket used in total knee arthroplasty; used for measuring knee joint pressure and changes and intraoperative soft tissue balance adjustment operation. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: assembly 1 perspective view 1. 5. Other components that need to be explained: component 1 is a knee joint surgery measurement gasket; component 2 is a knee joint surgery adjustment gasket.

The present invention relates to a tibial sensor pin insertion guide for robotic total knee arthroplasty and, in particular, comprises: a tibial contact part configured such that the bottom surface contacting the medial slope of the tibia is inclined upward at an angle of 30-40 degrees on both sides with respect to a center line; and a first pin insertion tube formed to penetrate the posterior side of the tibial contact part and to be inclined upward at an angle of 45-55 degrees with respect to the longitudinal direction of the tibial contact part. The present invention has the effect of preventing the sensor pin inserted into the tibia to mount a sensor during robotic total knee arthroplasty from damaging the peroneal nerve passing through the outer side of the tibia during the insertion process.

The embodiment of the invention discloses wearable knee joint equipment, a knee joint rehabilitation evaluation method and computing equipment. The wearable knee joint equipment comprises a flexible substrate; the sensing unit is integrated on the flexible substrate and comprises an electromyographic sensing module used for collecting surface electromyographic signals of rectus femoris for driving the knee joint to move; the muscular tension sensing module is used for generating a muscular tension signal by detecting skin deformation caused by knee joint movement based on the piezoresistive effect; the joint angle sensing module is used for generating a knee joint motion range signal by detecting knee joint flexion and extension strain based on the piezoresistive effect; the signal processing module is connected with the sensing units and used for processing and wirelessly transmitting the surface electromyogram signals, the muscular tension signals and the knee joint movement signals to a computing device so that the computing device can determine the state evaluation result of the knee joint rehabilitation state based on the signals. The possibility is provided for remote dynamic monitoring of TKA postoperative rehabilitation, and the accuracy of rehabilitation state evaluation is improved.

Disclosed herein is an angled wall femoral component (500) of a cam-post knee arthroplasty system for posterior cruciate ligament (PCL) replacement total knee arthroplasty (TKA) or revision TKA (rTKA) procedures, such as cruciate ligament (CS), bilateral cruciate ligament (BCS), or posterior stabilization (PS) procedures. The angled wall femoral component may include a femoral box (502) configured to receive a tibial post (110) of a corresponding tibial component (100). The anterior wall (508) of the femoral box is angled anteriorly and may include an anterior cam (561). The anterior wall is angled anteriorly to allow clearance between the anterior side of the tibial post and the anterior wall, while allowing a movable engagement between the tibial post and the anterior cam during knee flexion and extension, to which the femoral component is implanted.

The present invention discloses an osteotomy verification marker nail, which includes a marker nail head, a threaded upper segment of the marker nail, a non-threaded lower segment of the marker nail, and a marker nail tapered tail segment that are coaxially connected in sequence from top to bottom. It can be used in robot-assisted total knee arthroplasty to determine whether there is a relative displacement between the bone target of the surgical robot and the patient's bone. The present invention also discloses a supporting integrated driving and extracting device for the osteotomy verification marker nail, which includes a driving and extracting column, a driving and extracting hammer, and a marker nail joint. The driving and extracting column includes a driving and extracting column top, a driving and extracting rod, a driving and extracting handle, and a driving and extracting column bottom; the driving and extracting hammer includes a percussion ring and a percussion handle; the marker nail joint includes a joint top and a joint column provided at its bottom end. A groove is opened upward on the bottom end surface of the joint column, and a cylindrical magnet, an upper joint, and a lower joint are sequentially arranged in the groove from top to bottom. The integrated driving and extracting device facilitates the doctor to quickly drive in or extract the marker nail during the operation, improving the efficiency of the operation.

The invention discloses a deformation error compensation method for a dilator in total knee arthroplasty, and aims to solve the problem of measurement errors caused by deformation of a cantilever structure. The method comprises the following steps of: firstly, performing parameterized dynamic modeling and simulation on an external execution mechanism through finite element software, calibrating a model by combining actual measurement data of a physical prototype, and constructing a high-precision deformation data set; then, the data set is used for training a BP neural network optimized through a genetic algorithm, and the network takes the applied force and the displacement measurement value which are collected in real time as input and outputs a real displacement value after compensation. And finally deploying the trained lightweight network model in an embedded processing unit of the spreader to realize real-time error compensation. According to the method, complex nonlinear deformation errors are effectively compensated, the average absolute error is reduced to 0.056 mm, the real-time response delay is smaller than or equal to 5 ms, the method is remarkably superior to a traditional linear method, more accurate gap measurement is provided for an operation, and the method can be further used for forming closed-loop control and improving the intellectualization and precision of the operation.

The present disclosure provides alert implants that comprise a medical device and an implantable reporting processor (IRP), where one example of such a medical device includes a component for a total knee arthroplasty (TKA) such as a tibial extension, a femoral component for hip replacements, a breast implant, a distal rod for arm or leg breakage repair, a scoliosis rod, a dynamic hip screw, a spinal interbody spacer, and tooling and methods that may be used to form the alert implant, and uses of such alert implants in the health maintenance of patients who receive the implant.

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.

The present disclosure provides alert implants that comprise a medical device and an implantable reporting processor (IRP), where one example of such a medical device includes a component for a total knee arthroplasty (TKA) such as a tibial extension, a femoral component for hip replacements, a breast implant, a distal rod for arm or leg breakage repair, a scoliosis rod, a dynamic hip screw, a spinal interbody spacer, and tooling and methods that may be used to form the alert implant, and uses of such alert implants in the health maintenance of patients who receive the implant.

In some embodiments, provided herein is a method of administering an adductor tube block in a patient wherein the method comprises: (a) selecting an entry point of an injection needle in a leg of the patient; (b) inserting an injection needle into the entry point of the patient's leg; (c) identifying a first nerve of the patient's leg; (d) administering normal saline and a pharmaceutical composition to the first nerve; (e) identifying a second nerve of the patient's leg; (f) administering normal saline and the pharmaceutical composition to the second nerve; wherein the first nerve and the second nerve are selected from the group consisting of a medial femoral muscular nerve (NVM) and an implicit nerve, and wherein the first nerve is not the second nerve; and wherein the pharmaceutical composition comprises a multivesicular liposome.

A system including a knee ranging tool: including a base configured to locate on a resected proximal face of a tibia in a knee of a patient; defining a tibial reference surface configured to run against a femoral surface of an artificial femoral component, installed on a distal face of a femur of the patient, during articulation of the knee of patient; including a set of stages interposed between the base and the tibial reference surface, configured to locate the tibial reference surface relative to the base, and compliant to medial-lateral translation, anteroposterior translation, and transverse rotation; and configured to indicate a medial-lateral translation offset, an anteroposterior translation offset, and a transverse rotation offset corresponding to a position of the tibial reference surface, relative to the base, that yields elastic deformation of ligaments in the knee over a range of motion of the knee.

The invention discloses a total knee arthroplasty demand prediction method and system, and relates to the field of clinical auxiliary decision making. The method comprises the following steps: acquiring a knee MRI image, and automatically segmenting a joint gap key structure through a deep convolutional neural network to obtain a volume of interest (VOI); using an SERA tool to extract iconomics characteristics of the IBSI standard; and finally constructing a joint space and clinical feature radiomics model (JSC-RM) by combining a knee osteoarthritis outcome investigation (KOOS) score, so as to predict whether the TKR is accepted or not in the future 1-4 years. According to the method, LASSO feature screening and superficial layer neural network modeling are adopted, a threshold value is set in combination with a Youden index, the prediction performance is superior to that of an existing model, the consistency and accuracy of TKR opportunity judgment of resident doctors are remarkably improved, and preoperative intelligent risk intervention is achieved.

Instruments and components for improving the accuracy of resection of the proximal tibia in a kinematic alignment total knee arthroplasty (“TKA”). Instruments include an adjustable double tibial stylus instrument comprising: a first wide convex stylus tip and a second wide convex stylus tip at a second distal end of the second stylus. The wide convex stylus tips may be fixed components of the adjustable double stylus instrument, or the wide convex stylus tips may be detachable.

The utility model provides a tibial platform visualization device and operation navigation positioning system, tibial platform visualization device includes: registration tracking part, is used for on tibial platform sliding or point selects the characteristic point of different position on tibial platform, registration tracking part has first tracker, visualization tracking part, is used for installing on tibial platform clamping part, visualization tracking part has second tracker, control part, control part obtains the position information of registration tracking part when different position on tibial platform through first tracker, and obtains the position information of visualization tracking part through second tracker. The tibial platform visualization device can effectively solve the technical problem that tibial platform prosthesis is difficult to realize accurate positioning in the total knee arthroplasty process under the assistance of the orthopedic operation navigation positioning system in the prior art.

A system and method may use a robotic arm to perform a range of motion test for use in generating information related to kinematic alignment in a total or partial knee arthroplasty. A method may include controlling a robotic arm to move a tibia throughout a range of motion for a knee. A series of measurements of gap distance for the knee may be used to determine a tibial resection location for the tibia. The method may include updating a plan (e.g., 3D, preoperative) for an orthopedic procedure on the knee with the tibial resection location.

A device for increasing the range of motion (ROM) of a patient's afflicted knee joint following total knee arthroplasty (TKA) comprising an apparatus for insertion onto the pedal of an existing recumbent stepper machine. The apparatus enhances the functionality of recumbent steppers by (1) increasing the ROM angle of the knee at every seat position by moving the patient's foot closer to the stepper seat and thus the patient's torso, and by (2) allowing more ankle flection and a deeper guard rail than the original pedal to help maintain heel contact with the apparatus throughout the session.

Described herein are mechanical, self-contained, non-implantable devices for setting polyethylene thickness during pilot-scale trial and equilibrium of total knee arthroplasty. These adjustable trial tibial pad devices may be used with total knee arthroplasty (TKA) systems to optimally set the thickness and / or other dimensions of the articular surface of the TKA. These adjustable trial tibial pad devices may include a plurality of preset thickness settings, wherein the thickness is a thickness between a femoral articular surface and a tibial seating surface of the adjustable trial tibial pad device.