92 results about "Limb amputation" patented technology

The invention discloses a diabetic foot assessment method based on wound image recognition. The method comprises the following steps: processing a foot infrared thermal imaging image to generate a temperature anomaly graph; fusing the foot wound image and the temperature anomaly graph to generate a fused image; constructing a foot blood flow analysis model, extracting a blood flow influence factor, and correcting the fused image through the blood flow influence factor; and constructing a joint assessment model, taking the corrected fusion image and historical data of the diabetic foot patient as input of the joint assessment model, predicting a risk assessment level of the diabetic foot, and outputting a disease assessment result of the diabetic foot patient according to the risk assessment level. According to the method, multi-modal medical image fusion analysis is realized, the accuracy of wound area positioning and pathological state expression is improved, the accuracy of lesion area recognition is improved, the illness worsening risk can be predicted in advance, clinical decision can be assisted, the risk of serious complications such as amputation of a patient is reduced, and the prognosis and life quality of the patient are improved.

Various aspects of this disclosure relate to a layered polymer substrate with electrodes and conductive ink embedded in the substrate. In some embodiments, a prosthetic liner may be bonded onto the polymer substrate. The substrate may include an interconnect coupled to the electrodes via the conductive ink. The system may include a controller (e.g., an electrode controller) in communication with the electrodes via the conductive ink. The electrodes may be activated such that they may stimulate nerve fibers in a user's residual limb.

Various aspects of this disclosure relate to a layered polymer substrate with electrodes and conductive ink embedded in the substrate. In some embodiments, a prosthetic liner may be bonded onto the polymer substrate. The substrate may include an interconnect coupled to the electrodes via the conductive ink. The system may include a controller (e.g., an electrode controller) in communication with the electrodes via the conductive ink. The electrodes may be activated such that they may stimulate nerve fibers in a user's residual limb.

The present invention is directed to a reusable residual limb protector that can be used with a knee immobilizer to protect a recent amputee patient from further injury and infection of the amputation site while preventing knee flexion contractures. In alternative embodiments, the residual limb protector is configured for use with one patient. A method of use of the residual limb protector is also disclosed herein.

The present disclosure relates to the field of artificial limbs for amputees and specifically to a passive compliant wrist unit 210 for upper limb prosthesis. The passive compliant can comprise a plurality of fingers controlled by a compliant four bar mechanism. The arm is capable of extension / flexion, radial / ulnar deviation on application of a force on the snap joint. The limb is also capable of pronation / supination actions. By application of a force on an arm snap joint, the flexible wrist 216 can be adapted to perform extension / flexion, radial / ulnar deviation.

A lower limb motion intention prediction method based on multi-source signals comprises the following steps: firstly, analyzing motion characteristics of lower limbs of a human body, screening to-be-detected muscles, collecting electromyographic signals of a plurality of periods, and preprocessing the electromyographic signals; then linear features and nonlinear features of the electromyographic signals are extracted; the linear features and the nonlinear features of the electromyographic signals and motion capture information are fused through a series splicing method; a random forest method (RF-Bagging) is adopted to carry out feature selection on the feature matrix with the higher dimension; and finally, inputting the selected feature matrix by using a long short-term memory network (LSTM), performing joint continuous motion amount regression prediction according to the amputation type, and judging the motion intention recognition performance through various regression indexes. According to the method, joint continuous quantity prediction with a good effect under different amputation body types is realized.

Methods, systems, and / or apparatuses are provided for providing multi-joint assistance for and / or resistance against leg movement of a user. The assistance may be provided to a paretic leg or a prosthetic leg of the user. Kinematic data associated with the paretic or prosthetic leg of the user may be received. The data may include one or more of velocity data, position data, orientation data, or acceleration data for differing portions of the paretic or prosthetic leg. A current phase of a gait motion for the paretic or prosthetic leg may be determined based on the kinematic data. One or more of electrical stimuli or motorized assistance or resistance may be provided to the paretic leg, prosthetic leg, or the remaining portion of the amputated leg based on the current phase of the gait motion of the paretic or prosthetic leg.

The invention discloses an intelligent man-machine interaction artificial limb system for high-position upper limb amputation disabled people and a control method of the intelligent man-machine interaction artificial limb system. The system comprises a multi-degree-of-freedom artificial limb mechanism; the multi-mode sensing unit is used for collecting an interaction intention signal of a user and environment visual information; the intelligent decision-making unit is used for identifying a user task intention based on the interaction intention signal and the environment visual information and generating a high-level task plan; the task execution unit is used for driving the multi-degree-of-freedom artificial limb mechanism to execute operation according to the high-level task plan; wherein the task execution unit comprises a double-arm cooperative control module, and the double-arm cooperative control module is configured to adopt a cooperative control strategy based on the Stackelberg game to enable the prosthetic mechanism to actively generate a motion instruction coordinated with a sound arm of a user. According to the intelligent man-machine interaction artificial limb system and the control method thereof, natural, efficient and high-generalization auxiliary operation tasks can be achieved, and the system and the method are particularly suitable for daily use requirements of severe disabled people.

The invention discloses an active pneumatic buffering ankle joint artificial limb system and a control method thereof. The system comprises a sensing module, a control module and a pneumatic execution module. The pneumatic execution module adopts a closed loop composed of a miniature diaphragm air pump, an air storage tank and a damping air bag, and pre-storage and quick release of high-pressure air are achieved through the air storage tank. The control method is based on multi-sensor data fusion, high-strength impact can be pre-judged before the heel touches the ground, and the rigidity of the damping air bag can be adjusted in advance. The problems that a traditional artificial limb buffering system is lagged in response and fixed in parameter and an active motor system is high in energy consumption are solved, low-power-consumption, fast-response and self-adaptive intelligent buffering is achieved, and the walking comfort and safety of an amputee are remarkably improved.

The utility model discloses an armpit crutch suitable for hand amputation in the technical field of residual limb assistive devices, which comprises a buffer cushion, a first lacing device is fixedly mounted on the left of the buffer cushion, and a second lacing device is fixedly mounted on the right of the buffer cushion. The purpose of providing comprehensive and stable support for the hand amputee is achieved, and the effects of ensuring safe and reliable use of the hand amputee and improving comfort and practicability are achieved. Wherein the ingenious bridle design realizes firm fixation of the body, the combination of multiple groups of limiting blocks and cushioning springs improves the supporting stability and the damping performance, the height-adjustable structure meets different requirements, and the supporting platform specially arranged for the artificial limb effectively reduces pressure friction and prolongs the service life; the purpose of further strengthening the performance of the walking stick is achieved, and the effect of creating a safer and more durable action assisting tool for the hand amputee is achieved.

The present invention generally relates to pharmaceutical compositions, methods, and devices / systems for treating vascular diseases. More particularly, the present invention relates to medical methods, devices, and kits for delivering drugs to peripheral vascular tissue to treat neointimal growth. More specifically, the present invention described herein is intended to overcome the drawbacks of existing treatments for peripheral artery disease (PAD). The devices and methods of the present invention are for reducing one or more pathological conditions; reducing treatment complications in the treated patient population, reducing the target lesion revascularization (TLR) rate; and reducing the patient population that requires any type of leg amputation, particularly for patients with PAD associated with infrapopliteal (tibial) arteries, such as patients with clinical indications for treatment below the knee (e.g., claudication and / or critical limb ischemia (CLI)) for treatment below the knee, and patients with complex pathologies are specifically contemplated.

The invention provides an artificial limb control method and system. The artificial limb control method comprises the steps that sensory feedback information is acquired, and a stimulation signal is generated according to the sensory feedback information; wherein the sensory feedback information refers to state information of the artificial limb in a first contact state after the artificial limb is in contact with an external object, the stimulation signal is used for stimulating stress tissue of the amputee, and the stress tissue comprises muscular tissue or nervous tissue corresponding to the artificial limb; obtaining stress information generated after the stress tissue receives the stimulation signal; and generating a control signal according to the stress information, wherein the control signal is used for dynamically controlling the artificial limb and the external object to be switched from the first contact state to the second contact state. The contact state of the artificial limb and an external object is coordinated and corrected based on the sensory feedback information, the accurate control degree and the flexible coordination of the artificial limb are improved, the optimal adaptability is achieved, and the autonomous purpose of the amputee is achieved.

A prosthetic knee can include a variable-torque magnetorheological (MR) actuator assembly or braking system, a frame and an electronics assembly or system that also serves as a mount for the knee actuator and facilitates in monitoring and controlling the operation of the knee actuator. The prosthetic knee system advantageously provides resistive forces to substantially simulate the position and motion of a natural knee joint during ambulation and / or other locomotory activities performed by the amputee. The prosthetic knee can be enclosed in a waterproof compartment. An outer cover can be configured to fit around the waterproof cover of the prosthetic knee.

The application is suitable for the technical field of motion intention recognition, and provides an intelligent lower limb prosthesis human motion intention recognition method based on a stir-fried meat optimization algorithm. The application proposes a feature weight dynamic optimization framework based on the stir-fried meat optimization algorithm, realizes real-time adaptive distribution of motion feature weights through two links of offline weight vector training and real-time feature optimization execution. The algorithm achieves optimal results on 7 standard unimodal test functions and has good migration; through the above-knee amputation patient data set verification, the optimized weight matrix has the lowest number of recognition errors and the fastest optimization speed, significantly improves the classifier prediction accuracy and the environmental anti-interference ability of intention recognition, and meets the real-time requirement. The application solves the adaptability problem of intelligent lower limb prosthesis in complex life scenes, lays a foundation for high-reliability product development, has important practical application value in the motion scene recognition of lower limb prosthesis and walking aid robots, and has significant industrialization transformation potential.

The invention discloses a post-amputation nursing device for diabetic feet. The post-amputation nursing device comprises a base, an arc-shaped supporting plate and a supporting soft cushion. The arc-shaped supporting plates are placed in arc-shaped containing grooves of the base, the left arc-shaped supporting plate and the right arc-shaped supporting plate are hollow arc-shaped supporting plates, a plurality of adjusting air cylinders are evenly distributed in grooves in the upper surfaces of the arc-shaped supporting plates, and the supporting soft cushion is placed on the arc-shaped supporting plates and composed of a plurality of air cushion units. The front side, close to the bottom, of the base extends forwards to form a sliding table, and a nursing mechanism is arranged on the sliding table. The post-amputation nursing device for the diabetic foot is placed below a post-amputation limb, the post-amputation limb of the diabetic foot is clamped under the condition that the post-amputation limb is evenly stressed through the mutual synergistic effect of the supporting plate driving air cylinder, the adjusting air cylinder, the air pump, the pneumatic electromagnetic valve and the gas electromagnetic distribution valve, and then the end of the post-amputation limb is effectively heightened; the wound surface is prevented from being contacted with the bed surface after the amputation of the urine foot, so that the injury caused by compression or friction is avoided.

The invention relates to an improved method for manufacturing a so-called final socket (2') from a provisional socket (2), for fitting a residual limb of an amputee. The method comprises 3D modeling of the inner surface of the provisional socket (2), including a 3D model (44) of said surface in a spatial reference frame (11), and automatic modification of said 3D model (44) to optimize the arrangement of an artificial limb (3) on the final socket (2). The method further comprises optimizing a digitization step by determining an improved position for a distance measuring tool (42) within the provisional socket (2) during modeling. The invention also relates to a manufacturing aid system for a final socket configured to implement the method of the invention. Fig. 8

This application relates to the field of intelligent adjustment technology. Specifically, it discloses a prosthetic socket and its adaptive adjustment method. It uses artificial intelligence technology based on deep learning to analyze the pressure values between the residual limb and the socket collected by multiple pressure sensors, captures the pressure correlation pattern between the position of the residual limb and the socket, and introduces the spatial topological features between each pressure sensor to strengthen the feature expression of the pressure correlation pattern between the position of the residual limb and the socket, so as to intelligently evaluate the matching degree between the residual limb and the socket, and then realize the adaptive adjustment of the prosthetic socket. In this way, it can make the prosthetic socket more suitable for the residual limb, improve the comfort and stability of the prosthesis, reduce the pain and injury of the residual limb, and thus improve the quality of life of amputees.

The invention discloses a PTB socket model optimization design method and device, electronic equipment and a product, and relates to the technical field of rehabilitation engineering and rehabilitation assistive devices. According to the invention, the inner surface of the artificial limb socket model is divided into a pressure sensitive area and a pressure tolerance area, and a load is applied by simulating the maximum ground reaction force supported by a single leg when a shank amputation patient is assembled with an artificial limb to walk; then, the displacement increment of the grid surface in each pressure tolerance area is iteratively optimized through an optimization algorithm by taking the maximum overall comfort degree of the artificial limb socket model as a target, so that optimization design can be carried out according to individual differences of shank amputation patients, and the conditions of stress concentration of a sensitive area and insufficient support of a tolerance area are avoided; discomfort, pain and even secondary injury brought to the patient suffering from shank amputation are avoided, and the use experience of the patient suffering from shank amputation is improved.

The utility model discloses a prosthesis for children with congenital dysplasia of the foot, characterized in that it comprises a prosthetic foot, a connector, a connecting plate, a shoe body, a cover plate, and a tensioning mechanism; the connector is located between the prosthetic foot and the connecting plate, and is detachably connected to the prosthetic foot and the connecting plate respectively; the upper end of the connecting plate is fixedly connected to the rear part of the lower end of the shoe body; a groove is provided at the upper of the shoe body; the cover plate is located in the cavity formed by the shoe body, and fits on the outer wall of the shoe body at the groove; a tensioning mechanism is detachably connected to the outer wall of the shoe body; the tensioning mechanism is close to the groove. The utility model has the advantages that a prosthesis with a two-layer structure is formed by arranging a prosthetic foot, a connector, a connecting plate, and a shoe body, so that children with congenital dysplasia can walk normally without amputation, and when the patient wears the two-layer prosthesis, the correct biomechanical line can be guaranteed, and the growth and development of other bodies will not be affected, so that the legs can be guaranteed to be of equal length.

Various aspects of this disclosure relate to a layered polymer substrate with electrodes and conductive ink embedded in the substrate. In some embodiments, a prosthetic liner may be bonded onto the polymer substrate. The substrate may include an interconnect coupled to the electrodes via the conductive ink. The system may include a controller (e.g., an electrode controller) in communication with the electrodes via the conductive ink. The electrodes may be activated such that they may stimulate nerve fibers in a user's residual limb.

The present invention discloses a skin marking device for amputation surgery, comprising a tape measure and an arc-shaped sheath, wherein the tape measure is marked with a length scale; a curved ruler is inserted into the curved sheath, and the curved ruler can be extended and retracted along the curved sheath, and both the curved sheath and the curved ruler are made of flexible materials; the closed end of the curved sheath is fixedly connected to the zero-scale end of the tape measure; the curved sheath faces the tail end of the tape measure, and the curved sheath and the tape measure form an L shape; the inner wall of the opening of the curved sheath is provided with a first limit block, and the bottom end of the curved ruler is provided with a second limit block, and the first limit block cooperates with the second limit block; the device can conveniently perform a skin arc-marking operation before amputation surgery, and the drawn arc is accurate and regular, which is beneficial to skin suturing after the surgery.

A sports crutch for a football player with a lower limb amputation, comprising a main bar (1), characterized in that: an axillary support (2) is firmly connected to the surface of the main bar (1), an armrest (3) is firmly connected to the surface of the axillary support (2), a handpiece (4) is firmly connected to the surface of the main bar (1), a support bar (5) is firmly connected to the surface of the main bar (1), an end of the support bar (5) remote from the main bar (1) is firmly connected to a mounting seat (6), an elastic support element (7) is firmly connected to the surface of the mounting seat (6), a mounting plug (8) is firmly connected to the surface of the elastic support element (7), a hook-and-loop fastener spine surface (9) is firmly connected to the surface of the elastic support element (7),a Velcro fastener skin surface (10) adheres to the side of the Velcro fastener mandrel surface (9) remote from the elastic support element (7), and a non-slip padding layer (11) is firmly connected to the side of the Velcro fastener skin surface (10) remote from the Velcro fastener mandrel surface (9).

The invention relates to an improved method for manufacturing a prosthesis (1') from a positive mould (110), for fitting to a residual limb of an amputee. The method comprises 3D modelling of the inner surface of an existing socket (2) comprising a 3D model (44) of the surface in a spatial reference system (10) and automatic modification of the 3D model (44) in order to optimize the arrangement of an artificial limb (3) in the socket (2') to be manufactured. The method further comprises determining a position of a fastener (116) in the spatial reference system (10) with the aid of a guide (112) for placement of the fastener (116). The invention also relates to a manufacturing aid assembly (100) configured to aid in the manufacture of a socket according to the method of the invention and comprising a positive mould (110) and the placement guide (112).

A knee orthosis for a trans-tibial amputee having a leg prosthesis including a socket for receiving a stump, the knee orthosis has: a femoral cuff; a tibial cuff having an inner face facing the socket and an outer face, the tibial cuff defining a locating member; a hinge pivotally connecting the cuffs; and a tibial cuff locator including a body protruding from a base, the base having a prosthesis engaging surface adapted to be mounted on the leg prosthesis, the body of the tibial cuff locator extending outwardly from the base along a locator axis, the body being matingly engaged with the locating member of the tibial cuff, wherein translation of the tibial cuff relative to the tibial cuff locator in one or more directions transverse to the locator axis is mitigated with the tibial cuff locator matingly engaged with the locating member of the tibial cuff.

This invention discloses a 3D-printed prosthesis shaping method, relating to the field of prosthesis manufacturing. The method includes: S1 obtaining reference information and limb information; S2 constructing a reference model and retaining the limb model; S3 refining the reference model to obtain an appearance model; S4 extracting the main body model; S5 adjusting the size of the main body model; S6 3D printing the main body model to obtain a supporting body; S7 3D printing the appearance model to obtain an appearance body; S8 creating a plaster mold of the appearance body; S9 dividing the plaster mold to obtain a sub-mold; S10 placing the supporting body inside the sub-mold; S11 merging and splicing the sub-molds; and S12 injecting a liquid flexible material into the plaster mold, which solidifies to obtain the prosthesis. By obtaining limb information at the location of the prosthesis to be installed and adjusting the reference model based on this information, the method realizes the personalized needs of amputees for prostheses, fundamentally improving the wearing comfort and aesthetics of the prosthesis, and significantly promoting the psychological recovery of confidence in amputees. It also significantly reduces the manufacturing cost and time of the prosthesis.

The invention discloses an intelligent assistance method and system for nursing rehabilitation, and relates to the technical field of medical intelligent assistance. The method comprises the following steps: acquiring residual neural signals of an amputation part, and performing regionalized decoding on different channel signals in combination with a distributed processing unit to generate an action intention signal matrix; on the basis of the action intention signal matrix, synchronously triggering the activation of the corresponding nerve region and the residual limb muscle to form a nerve-muscle synchronous action data stream; performing comparative analysis on the monitoring data and the nerve-muscle synchronous action data flow, and extracting a dynamic error signal; nerve stimulation parameters and muscle stimulation parameters are optimized through the multi-modal data fusion model; a complete nerve-muscle cooperative control scheme is generated, and the residual limb or the artificial limb of the patient is driven to complete the target action in real time. According to the invention, the problems of poor neural signal decoding accuracy, mismatching of nerve-muscle responses and the like in the prior art are effectively solved.

Various aspects of this disclosure relate to a layered polymer substrate with electrodes and conductive ink embedded in the substrate. In some embodiments, a prosthetic liner may be bonded onto the polymer substrate. The substrate may include an interconnect coupled to the electrodes via the conductive ink. The system may include a controller (e.g., an electrode controller) in communication with the electrodes via the conductive ink. The electrodes may be activated such that they may stimulate nerve fibers in a user's residual limb.

The present disclosure provides systems, devices, and apparatuses for prosthetic fingers that can be used in a person who has had a metacarpophalangeal joint or proximal amputation. The apparatus provides opposition to force in the extension direction via a spring-loaded pawl and locking rack and pinion mechanism, restoring grip force in a person missing a finger or thumb, allowing the individual to manipulate or stabilize objects. The finger can be spring loaded in the extension direction by a torsion spring or other biasing member. The pawl can automatically disengage the rack when the finger reaches full flexion, and the full flexion disengagement stop can be adjustable. The pawl can automatically engage the rack when the finger is fully extended, and the extension stop is adjustable. The pawl can include a transverse feature that creates an obstruction with the anchoring linkage and limits deflection of the structure under loading.

Various aspects of this disclosure relate to a layered polymer substrate with electrodes and conductive ink embedded in the substrate. In some embodiments, a prosthetic liner may be bonded onto the polymer substrate. The substrate may include an interconnect coupled to the electrodes via the conductive ink. The system may include a controller (e.g., an electrode controller) in communication with the electrodes via the conductive ink. The electrodes may be activated such that they may stimulate nerve fibers in a user's residual limb.