207 results about "Residual limb" patented technology

Various aspects of this disclosure relate to a prosthetic cover comprising an array of sensors, which transmit signals to an array of electrodes in a liner that fits over a residual limb of an amputee. Different interactions with the prosthetic cover cause different activation of the electrodes to transmit electrical current through different areas of the residual limb and modulate neurons differently within the residual limb. Various aspects of this disclosure also relate to a prosthetic liner with a substrate that includes electrodes for transcutaneous electrical nerve stimulation and / or electronic muscle stimulation for a 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.

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.

A prosthetic liner having a lower longitudinal stretch in the distal region than in either the proximal or optional intermediate region. The distal region may stretch anywhere from 0-30% vertically and 10-200% horizontally as compared to the proximal region's vertical stretch of 55-125% and 100-175% horizontally. A variety of stitches may be used at the distal end to implement this lowered longitudinal stretch. The liner also has an interior layer of elastomer gel. The design of this prosthetic liner is primarily to prevent the “pistoning” of the amputee's residual limb within the liner and for comfort over pressure-sensitive areas of the residual limb. The liner also includes the use of a low extensibility material which is adhered to the fabric portion of a prosthetic liner or orthotic liner either internally or externally and limits the longitudinal movement while allowing for transversal movement.

The present disclosure describes self-adjusting sockets for lower limb prostheses in which each step transmits motion to a resilient resistive element coupled to an actuator configured to cycle between a rest position and an actuated position. The resistive element can transmit the motion to the actuator to cycle the actuator. Each cycle of the actuator acts through a mechanical linkage to tighten the socket around the residuum, until a desired threshold tightness on the residuum is reached. After the threshold tightness is reached, the resistive element yields and absorbs the motion rather than transmitting the motion, so that the actuator ceases to cycle on each step, preventing further tightening beyond the threshold.

The invention relates to an optimization method for coupling of an artificial limb and a residual limb based on digital twinning. Carrying out multi-modal data fusion on anatomical structure characteristics, functional attributes and stress distribution data of the skin, the soft tissue and the bone of the stump; building multi-layer digital stump relation modeling; defining a multi-scale contact space formed by a structure adaptation area, a force transmission area and an energy buffer area in the dynamic behavior of the residual limb and the artificial limb; simulating a shear force migration track, a stress concentration mode and soft tissue slippage response among micro-units of a coupling surface in dynamic interaction; constructing a physical partition relationship of the coordination domain, and assisting in optimizing an artificial limb interface structure and a material functional gradient; describing a minimally invasive area caused by wearing and using the artificial limb, and calculating a minimum tissue perturbation path; through deformation vector field analysis and thermal-mechanical coupling relation modeling, risk distribution of tissue fatigue induced by the prosthetic interface under long-time use is evaluated; and dynamic multi-scale coupling optimization and multi-objective optimization control are carried out to realize visual prediction and early warning of fatigue risks.

The invention discloses a waterproof light artificial foot in the technical field of artificial limbs, and the waterproof light artificial foot comprises an artificial foot outer layer, a foot core and a static ankle connecting disc, the artificial foot outer layer wraps the foot core, a keel and a weight reducing groove are additionally arranged on the foot core, and the keel and the weight reducing groove are matched with each other, so that the structural supporting strength of the foot core is effectively guaranteed, the dead weight of the artificial foot is effectively reduced, and the service life of the artificial foot is prolonged. Further, the stump load of the user is reduced, the amount of exercise of the wearer during walking is reduced, and the disabled can use the device more effortlessly; the static ankle connecting disc tightly covers the top of the foot core and the top of the outer layer of the artificial foot, so that the foot core is effectively waterproof, a central water tank and a side water tank are additionally arranged, water at the top of the foot core can be guided and drained away, water vapor can be conveniently volatilized, water is effectively prevented from being deposited between the foot core and the static ankle connecting disc, the static ankle connecting disc and a butt joint bolt are effectively prevented from being rusted, and the service life of the foot core is prolonged. The whole structure of the foot core can be conveniently kept dry, the service life of the whole artificial limb is prolonged, and the artificial foot is more convenient to maintain and clean.

The invention provides a constant-force gas spring hydraulic drive type artificial limb socket. The constant-force gas spring hydraulic drive type artificial limb socket comprises an artificial limb socket shell and a plurality of constant-force compression assemblies. The constant-force compression assemblies are circumferentially arranged around the inner ring of the prosthetic socket shell at equal intervals; the constant-force compression assembly comprises a constant-force driving mechanism, a guide limiting mechanism and an extrusion plate; the extrusion plate is in transmission connection with the constant-force driving mechanism, and the extrusion plate is limited and fixed with the constant-force driving mechanism through the guide limiting mechanism; the constant force driving module is designed according to the constant force output characteristic of the gas spring, automatic adjustment of the volume of the residual limb within the constant force range is achieved, the problems of skin injury and the like caused by too large stress between an artificial limb socket and the residual limb are solved, and the wearing comfort of a patient is improved.

This invention relates to a prosthetic socket device, a prosthesis, and a negative pressure adjustment method. The prosthetic socket device includes a receiving shell and an adjustment and fixing device. The receiving shell has a receiving cavity with one open end. One end of the receiving shell is detachably connected to the adjustment and fixing device, and the other end is connected to a mounting part for mounting and fixing the prosthesis body. The adjustment and fixing device has an adjustment and fixing cavity that can be adjusted and positioned according to the size of the residual limb. The adjustment and fixing cavity communicates with the receiving cavity through the opening, allowing the residual limb to pass through the adjustment and fixing cavity and extend into the receiving cavity for fixation. The prosthetic socket device, prosthesis, and negative pressure adjustment method provided by this invention solve the problems of high cost and poor applicability of existing prosthetic sockets.

The present invention provides a method and device for optimizing the shape of a prosthetic receiving cavity, the method comprising the following steps: constructing a residual limb model, dividing the residual limb surface into multiple regions, and setting an extrusion center in each of the regions; setting the shape characteristics of the prosthetic receiving cavity as an extrusion strategy, and performing an extrusion test on each region of the residual limb surface to obtain test indicators of the extrusion center of each region; wherein the test indicators include at least two of the residual limb compression rate, the suspension force gap deviation value, the support force gap deviation value, and the bone movement limiting force gap deviation value; taking the stress bearing capacity of each part of the residual limb as a constraint condition, performing multi-objective optimization on the test indicators, and solving the minimum values ​​of multiple test indicators at the same time, and finally determining the optimal shape characteristics of the receiving cavity. The present invention utilizes computational simulation and multi-objective optimization technology, and can achieve a prosthetic receiving cavity shape design that takes into account both comfort and functionality by performing detailed extrusion analysis and extrusion strategy testing on the residual limb model.

The invention relates to the field of medical instruments, in particular to an intelligent upper limb prosthesis sensing system with a tactile representation function. The touch sensing module is used for collecting touch information when the artificial limb is in contact with an external object; the signal processing module is electrically connected with the tactile sensing module and is used for converting the tactile information into recognizable tactile feature data; the feedback control module is connected with the signal processing module and is used for generating a corresponding feedback control signal according to the tactile feature data in combination with a preset tactile feedback strategy; and the feedback execution module is connected with the feedback control module and is used for executing corresponding actions according to the feedback control signal and providing tactile feedback for the residual limb part of the patient. Tactile information (direct tactile information and indirect tactile information) is collected through the tactile sensing module, so that the perception of a patient when the patient touches an external object through the artificial limb is 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 utility model discloses a dog's movable all-covered artificial limb relates to pet artificial limb technical field, including adjusting component, adjusting component includes telescopic groove, rotary handle, support tube and elastic support leg, the bottom opening of telescopic groove is rotatingly equipped with rotary handle. According to the movable full-wrapping artificial limb for the dog, firstly, the belly receiving cavity is arranged on the belly of the pet and fastened through the hook-and-loop fastener, then the stump part of the pet is placed in the stump receiving cavity with the top opening of the full-wrapping barrel, and finally according to the use requirement, the rotating handle is rotated to be matched with the supporting pipe through the threaded groove of the hole of the rotating handle; the extension length of the telescopic groove, located in the opening of the bottom of the full-wrapping barrel, of the supporting pipe is adjusted, so that the artificial limb part and other limbs are kept to be consistent in height, and the assembly requirements of pets of different systems are met. And meanwhile, the structure is simplified, and the production cost is reduced.

A prosthetic liner having a lower longitudinal stretch in the distal region than in either the proximal or optional intermediate region. The distal region may stretch anywhere from 0-30% vertically and 10-200% horizontally as compared to the proximal region's vertical stretch of 55-125% and 100-175% horizontally. The stretch of the liner at various pressure sensitive regions of a residual limb can also be lowered or heightened depending on the area. A variety of stitches may be used at the distal end to implement this lowered longitudinal stretch. Preferably, the liner is made of a stretchable material. The liner also has an interior layer of elastomer gel. The design of this prosthetic liner is primarily to prevent the "pistoning"of the amputee's residual limb within the liner and for comfort over pressure-sensitive areas of the residual limb.

The present application relates to a kind of power ankle prosthesis based on adjustable position one-way parallel spring, mainly by support mechanism, power direct drive mechanism, spring mechanism, adjusting mechanism, toe mechanism composition.Support mechanism is connected with human lower extremity stump, power direct drive mechanism, spring mechanism, adjusting mechanism are fixed on support mechanism, and toe mechanism is hinged with support mechanism.The support mechanism of the present application provides the support of ankle prosthesis, power direct drive mechanism and spring mechanism provide the energy output and support torque required in the walking process of power ankle prosthesis, spring mechanism stores passive energy and releases, compensates motor energy consumption, adjusting mechanism realizes the adaptive adjustment to wearer gait speed in the walking process, and elastic toe mechanism simulates the elastic mechanism of normal human toe in the walking process, provides passive elastic grip for ankle.

The utility model relates to an artificial limb socket fitting and taking device, which belongs to the technical field of medical auxiliary instruments and comprises a platform for a patient to stand, a supporting part movably connected with the platform along the outer edge of the platform and vertically extending, and a supporting part movably connected with the platform along the outer edge of the supporting part, and the connecting sleeve is connected with the supporting part and is used for mounting an artificial limb receiving cavity. Through the structure, the supporting part and the connecting sleeve are not only fixed at one position any more, during use, a patient stands on a platform, and when the patient does not try on or take the shape, the supporting part and the connecting sleeve on the supporting part are moved to one side of the residual limb of the patient, and the receiving cavity is installed on the connecting sleeve; and the supporting part and the connecting sleeve on the supporting part are moved away from one side of the stump, so that the supporting part and the connecting sleeve are prevented from interfering and blocking the operation of a stump maker, and the artificial limb socket fitting and taking device is higher in practicability.

The invention belongs to the technical field of biomedical engineering, and particularly relates to a manipulator for the disabled, which comprises a joint assembly and a residual limb connecting assembly, a mechanical arm is arranged on one side of the joint assembly, the residual limb connecting assembly is rotationally connected to the other side of the joint assembly, one end of the residual limb connecting assembly is of an open structure, an elastic bandage is arranged on the side, away from the joint assembly, of the end of the residual limb connecting assembly, and a hook-and-loop fastener is arranged on the surface of the elastic bandage. The stump end of a user is sleeved with the stump connecting assembly through an open structure at one end of the stump connecting assembly, so that the joint of the joint assembly and the stump connecting assembly rotates, the angle is adjusted, and meanwhile the stump connecting assembly can be used for adjusting the comfort of the stump end of the user; and the comfort of wearing the manipulator at the stump end of the user for a long time is improved.

The utility model discloses an artificial limb socket with a neck bush, and relates to the technical field of artificial limb sockets. Comprising an artificial limb receiving cavity, and a threaded hole is formed in the bottom of the artificial limb receiving cavity; the neck bush is used for being arranged on the stump in a sleeving mode, a metal support is arranged at the bottom of the outer side of the neck bush, and a lock pin is detachably connected to the center of the bottom of the metal support; the anti-damage bottom support structure is arranged at the lower end part of the neck bush and is connected with the metal support; and the outer side of one end of the special-shaped lock, which is provided with a lock hole for inserting the lock pin, is provided with an external thread and extends into the threaded hole to be connected with the artificial limb receiving cavity through threaded connection. The neck bush is detachably connected into an artificial limb receiving cavity through the special-shaped lock, wearing of an artificial limb is facilitated, meanwhile, the stump is better supported through the anti-damage bottom support structure at the rigid connecting position of the bottom of the neck bush, the stump is prevented from being hurt due to the fact that reverse acting force is generated on the stump, and the leg is prevented from being hurt.

The invention discloses a digitization and flexible pressure sensor combined thigh prosthetic socket optimization manufacturing method. Performing digital reconstruction on the thigh stump physical model; performing space calibration and size calibration processing on the reconstructed stump structural plane digital model; carrying out sparse processing on the stump structural plane digital model after space calibration and size calibration, and editing and optimizing the stump structural plane digital model; splicing the sparse point cloud digital model and the digital point cloud model of the hat brim and the seat support to form a thigh artificial limb digital model; a flexible pressure sensor is arranged for pressure analysis and adjustment of the thickness of a local segment, a prosthetic socket digital model with double-sided sparse point clouds formed on the outer layer surface is generated, and finally conversion is performed for 3D printing. According to the invention, the flexible sensing unit corresponds to the point cloud unit on the digital skin, real-time change evaluation of muscle stress under static and dynamic conditions is carried out, the physiological change of a patient can be rapidly adapted during re-examination, and a more personalized and timely rehabilitation solution is provided.

Systems and methods are provided for applying electrical stimulation to a body by an electrode spaced from a target nerve of passage. It has been discovered that pain felt, or perceived to be felt, in a given region of the body can be treated by stimulating muscle close to a “nerve of passage” in a region that is superior (i.e., cranial or upstream toward the spinal column) to the region where pain is felt, such as in a case of post-amputation residual limb pain, or purportedly felt in the case of post-amputation phantom limb pain.

An adjustable socket system includes first and second shell components and first and second longitudinal supports connected to a base. The socket system is movable between an open configuration to loosen the fit of the socket system, and a closed configuration to secure the fit of the socket system on residual limb received therein. A tightening system includes a tensioning unit having a handle defining a moment arm rotatable about a rotation axis, and a tensioning element operatively coupled to the handle via a movable connection point located and protected between the first shell component and the first support and to the shell components via a control point. Rotation of the handle displaces the movable connection point and the tensioning element relative to the control point to move the socket system to the closed configuration.

A prosthetic liner configured to be worn over a residual limb of a user is disclosed. The disclosed prosthetic liner can include a gel sleeve configured to be worn over the residual limb and comprising a plurality of cells disposed on the gel sleeve configured to receive a fluid and exert pressure on the residual limb, a pump fluidically coupled to the gel sleeve and configured to move the fluid into the plurality of cells, and a control board electrically coupled to both the gel sleeve and the pump and configured to control activation of the pump.

The utility model relates to the technical field of correctors, in particular to a corrector for preventing joint deformity of a stump, which comprises a fixing band supported by a metal support strip, a fixing iron piece and a connecting elastic band, the outer side of the fixing band is fixedly connected with the fixing iron piece, one end of the fixing iron piece penetrates through one side of the fixing band and is fixedly connected with one end of the connecting elastic band, and the other end of the fixing iron piece is fixedly connected with the connecting elastic band. The connecting elastic band is fixedly connected with the soft orthopedic sleeve through the fixing iron piece, one end of the fixing band is fixedly connected with an adjusting device, and a ventilation device is installed on the outer side of the fixing band. The fixing band comprises a fixing band main body, one side of the fixing band is provided with a mounting groove, one side of the mounting groove is fixedly connected with a hook surface magic tape through sewing, the ventilation device comprises a moisture absorption layer, and one side of the moisture absorption layer is fixedly connected with an auxiliary structure through sewing. Sweat is prevented from accumulating between the stump and the corrector, and the skin problem caused by long-time soaking of sweat is avoided.

A sensor-driven adaptive thermal regulation system for prosthetic sockets is disclosed. The system integrates sensors with active thermoelectric cooling elements to manage heat and moisture accumulation within the prosthetic socket. Thermoelectric modules are positioned in proximity to the user's residual limb and are controlled by a Processing unit via; Logic-based circuitry. A heat transfer material serves as a thermal sink and a prosthetic liner, absorbing heat through state transitions to enhance dissipation. The system supports both manual and autonomous operation. In manual mode, users control cooling via a mobile application featuring biometric authentication, real-time sensor monitoring, and override functionality. In autonomous mode, cooling is triggered automatically when preset environmental thresholds are exceeded. A flexible heat sink further ensures efficient thermal transfer, improving prosthetic fit, comfort, and wearability. The system may be integrated into liners or retrofitted into existing above-knee and below-knee prosthetics.

A ventilated prosthetic socket includes a rigid, structural and load-bearing socket body forming an inner volume adapted to receive a residual limb, and a wall thickness extending from an inner wall surface bordering the inner volume to an outer wall surface. The socket body defines an opening extending through the wall thickness. At least one vent element communicates the inner wall surface to the outer wall surface and extending therebetween in the opening along the socket body to thereby permit a transfer of air from the inner volume to outside of the socket through the opening. The at least one vent element is separately formed from the socket body and discretely insertable into the opening and secured against the inner surface and the outer wall surface. A method and kit are provided to adapt the socket in a ventilated form.

The utility model relates to the technical field of artificial limb sockets, in particular to an ergonomic socket device, which is characterized in that a binding belt is sleeved above a residual limb, the binding belt and the residual limb are fixed through adhesion among a plurality of magic tapes, a carbon fiber shell is sleeved on the outer side, and a lacing rope is tied on a proper air hole. The tail end of the residual limb is placed in the nylon sleeve, the using stability of the carbon fiber shell can be improved, the multiple air holes formed in the carbon fiber shell can enable air to enter the carbon fiber shell, the air permeability of the skin is guaranteed, the weight of the carbon fiber shell can be greatly reduced through the air holes, and the service life of the carbon fiber shell is prolonged. The effect of wearing and using for a long time is achieved through a force bearing point formed by the nylon sleeve and the stump, the ball joint can enable the threaded sleeve to rotate, bend and the like, when the carbon fiber shell is lifted up, the threaded sleeve resets under the action of the elastic force of the rubber sleeve, and the effect of improving the flexibility of the prosthetic foot plate is achieved.

A silicone prosthetic liner for use with a prosthetic assembly that acts as the interface between the residual limb of an amputee and the socket assembly. The prosthetic liner comprises an open proximal end, a closed distal end, and sidewalls comprising an inner layer of molded silicone. The silicone is molded over a mandrel that has been sandblasted using #36 grit and, optionally, #320 grit at 100 psi so as to form microcraters and reduce the coefficient of static friction.

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

The utility model relates to the technical field of artificial limb production, and discloses a multidirectional fixing device for a stump model, which comprises a chassis, the inner bottom wall of the chassis is fixedly connected with a servo motor II, the output end of the servo motor II is fixedly connected with a turntable, the two sides of the top wall of the turntable are fixedly connected with support plates, and the support plates are fixedly connected with the bottom wall of the chassis. A first servo motor is fixedly connected to the side wall of the supporting plate on one side, first transmission shafts are slidably connected to the two ends of the rotating rod through clamping grooves correspondingly, transmission belts are arranged on the peripheries of the two first transmission shafts correspondingly, the two first transmission shafts are connected with second transmission shafts through the transmission belts correspondingly, and connecting plates are fixedly connected to the middles of the two second transmission shafts correspondingly. According to the device, the clamped stump model can be driven to rotate by starting the second servo motor, the stump model can be driven to turn over by starting the first servo motor, and therefore a worker can conveniently adjust the fixed stump model in multiple directions.