13 results about "Wrist bone" patented technology

The present disclosure relates to a prosthesis (400) configured for implantation in a carpometacarpal joint in the wrist, the prosthesis comprising a first and a second implant part member (405a,b) configured to be screwed into a radius and metacarpal bone respectively. Each implant part member (405a,b) comprising an articulation member (420a,b) configured to be received in the bone fixation member (410a,b) in a releasable manner. The articulation members (420a,b) comprise orientation pins (423) configured to be inserted into bore sections of the bone fixation members 410a,b. When seated in the bore sections, the first portions of the articulation members (420a,b) with the orientation pins (423) are substantially centered along the central axes of the bone fixation members (410a,b), thereby forming common central axes extending through the bone fixation members (410a,b) and the articulation members (420a,b). The radius articulation member (420a) comprises a replacement articular surface configured for articulation with a replacement articular surface located on the metacarpal articulation member (420b). The radius replacement articular surface has (420a) a configuration that is asymmetric about the common central axis of the radius bone fixation (410a) and articulation members (420a). The bore sections have cross-section (419) extending perpendicularly to the central axis defining a first polygonal outline (429). The orientation pins (423) have cross-sections defining a second polygonal contour line, such that when the orientation pins (423) of the articulation members (420a,b) are seated in the bores of the bone fixation members (410a,b), rotation of the articulation members (420a,b) in relation to the bone fixation members (410a,b) is prevented.

Disclosed is a device for total wrist fusion that includes (a) a first section, which is preferably a plate, that is positioned under the skin on top of the forearm, wrist and potentially part of the hand and connected to one or more of the radius or carpal bones, (b) a second section, which is preferably in the shape of an awl and is received in the cannula of the third metacarpal bone. Optionally, an anti-rotational third section may be included, which can connect to the top of the third metacarpal bone.

The present application relates to the technical field of deep learning, solves the technical problem that the existing deep learning method often ignores the refinement of data preprocessing and the universality of training strategy when processing medical images, resulting in limited model generalization ability, and especially relates to a wrist joint bone quality classification method based on deep learning. First, a standardization preprocessing procedure is performed on the medical image, and then a two-stage hierarchical data enhancement mechanism is introduced to greatly improve the model performance. Then, the VGG16_bn model based on ImageNet pre-training is selected and fine-tuned as the core feature extractor, and the Focal Loss loss function is introduced in the model training process, so that it can accurately capture the key features of osteoporosis in the medical image. Finally, in the validation of the osteoporosis image classification task, the classification of the wrist joint shows an accuracy of up to 98%, which highlights its excellent performance and broad application prospect in clinical diagnosis.

The utility model provides a wrist bone injury nursing exercise device, which relates to the technical field of sports equipment, and comprises two mounting blocks, the opposite surfaces of the two mounting blocks are fixedly connected with a plurality of springs, the outer surface of one mounting block is fixedly connected with two supporting shells, and the outer surface of the other mounting block is fixedly connected with a plurality of connecting rods. The surfaces of the inner walls of the two supporting shells are rotationally connected with supporting rods through bearings. During use, the pull rings are held by two hands respectively, then force is applied to the two sides, one mounting block drives the two pieces of protective fabric to move, the protective fabric drives the supporting rod to rotate, the torsional spring compresses the stroke to absorb kinetic energy, the area of the protective fabric is stretched along with the stroke of the springs, the springs are shielded, and the springs are prevented from being broken; meanwhile, the protective fabric prevents the situation that the spring is attached to the surface of the body when stretched, the stroke of the spring is shortened when the spring is released, and the spring is clamped to the surface of the body, and the use experience is improved.

The invention discloses a wrist bone injury rehabilitation training device, and relates to the technical field of rehabilitation training equipment. Comprising a hand fixing cylinder and an arm fixing cylinder. The hand fixing cylinder and the arm fixing cylinder are connected through a plurality of connecting rods; a driving mechanism for driving the connecting rod to do telescopic motion is arranged on the arm part fixing cylinder; and the connecting rod is used for driving the hand fixing cylinder to swing. The device adopts a wearable design, is small in size and light in weight, can be worn by a patient, realizes rehabilitation training anytime and anywhere, overcomes the defect of fixed-point fixation of an existing device, improves the flexibility and convenience of rehabilitation training, and further improves the rehabilitation compliance of the patient.

A finger joint reduction simulation training device includes forearm, carpal, metacarpal, proximal phalanx, and middle phalanx portions, and at least one biasing element. The carpal portion is attached to a distal end of the forearm portion. The metacarpal portion is connected to the carpal attachment. The proximal phalanx portion has a proximal end that is connected to the metacarpal portion and a distal end opposite to the proximal end. The distal end includes a dislocation guide surface with a depression formed therein. The middle phalanx portion is positioned adjacent the proximal phalanx portion and includes a proximal end with a terminal surface configured to shift relative to the dislocation guide surface and includes a projection configured to extend into the depression of the dislocation guide surface. The biasing element is configured to bias the terminal surface of the middle phalanx portion against the dislocation guide surface.

A bone removal device configured to increase efficiency of total ankle surgery by enabling removal of resected portion of tibia from a patient is disclosed. In particular, the bone removal device may enable a resected portion of a bone, such as, but not limited to, a tibia, to be pulled from the bone. The bone removal device may be configured to be used in total ankle surgery on a tibia, in carpectomies on hand or wrists, and other surgeries in which assistance removing a resected portion of bone would be beneficial. The bone removal device may include one or more filaments to remove the resected tibia from the tibia. The bone removal device may include a bone removal device body supporting one or more arms which, in an open position, enable the bone removal device to pull the resected portion of bone from the bone.

The invention relates to the technical field of deep learning, solves the technical problem that when an existing deep learning method is used for processing a medical image, refinement of data preprocessing and universality of a training strategy are often ignored, so that the generalization ability of a model is limited, and particularly relates to a wrist joint bone classification method based on deep learning. Firstly, a standardized preprocessing process is performed on a medical image, and secondly, a two-stage hierarchical data enhancement mechanism is introduced to greatly improve the model performance. Then, a VGG16bn model based on ImageNet pre-training is selected and finely adjusted to serve as a core feature extractor, and a Focal Loss loss function is introduced in the model training process, so that key features of osteoporosis in a medical image can be accurately captured; finally, in the verification of an osteoporosis image classification task, the accuracy rate in the classification of wrist joints is as high as 98%, and excellent performance and wide application prospects in clinical diagnosis are manifested.

The invention discloses a method and system for evaluating the bone age of a human body through a three-dimensional ultrasonic image and a medium, and belongs to the technical field of medical image processing and three-dimensional reconstruction. Comprising the following steps: acquiring a three-dimensional ultrasonic image of a human wrist bone; segmenting a bone tissue region of the three-dimensional ultrasonic image to generate a binary mask; converting a pixel region corresponding to the wrist bone tissue in the binary mask into a discrete three-dimensional point cloud; acquiring global features based on the three-dimensional ultrasonic image; the three-dimensional point cloud generates an initial bone surface through Gaussian distribution; iteratively generating a globally continuous UDF field through a UDF predictor; determining each point on the bone surface based on the UDF field, and outputting a smooth bone surface grid model; evaluating block-by-block epiphysis on the bone surface grid model in a grading manner, and calculating the bone age; according to the method, the bone age of the human body can be accurately predicted by using the ultrasonic image.

The wrist joint prosthesis comprises a carpal bone holder and a radius prosthesis, one of the carpal bone holder and the radius prosthesis is provided with a wrist joint convex, and the other is provided with a wrist joint concave, the wrist joint convex and the wrist joint concave are matched to make the carpal bone holder and the radius prosthesis movably abut together; wherein, the side of the carpal bone holder, which is opposite to the radius prosthesis, has an abutting surface, the abutting surface is used to abut against a carpal bone side bone cutting surface, the abutting surface comprises a platform surface and a first slope surface and a second slope surface connected to opposite edges of the platform surface, the included angle A between the first slope surface and the platform surface ranges from 15° to 35°, and the included angle B between the second slope surface and the platform surface ranges from 25° to 45°. The wrist joint prosthesis, the overall shape of the abutting surface of the carpal bone holder is similar to the shape of the bone surface at the place where the carpal bone is used to install the carpal bone holder, so that when the carpal bone is cut to form a bone cutting surface which is adapted to the abutting surface, the bone cutting amount of the carpal bone can be reduced as much as possible.

The application discloses a stress release nursing bracelet suitable for teenagers and an intervention system, relates to the technical field of wearable smart devices, and comprises an elastic watchband, the end face of which is provided with an arc-shaped light-transmitting panel, the outer end of which is provided with a flexible LED breathing light belt, the side end of which is provided with a micro loudspeaker, and the lower end of which is provided with a magnetic attraction interface and a pressure sensor; the inner end of the panel is provided with a biological sensor module, a main control chip, a micro-vibration motor and a battery module. The inner side of the panel is curved and attached to the wrist, and the curvature is contracted to adapt to different thicknesses; the light belt is arranged in a ring shape, and the light is uniformly diffused; the loudspeaker groove faces outward and upward, and is avoided from being shielded; the magnetic attraction interface is flush with the watchband, and does not disturb the closing; the pressure sensor is arranged at the wrist bone position, and the sensing surface is slightly concave. The biological sensor module is close to the radial artery, the sensing head is directional to the blood vessel; the main control chip is centrally and downward, and the connecting line is shortened; the micro-vibration motor is arranged on the ulna side, and the vibration sensing is uniformly transmitted to the wrist. The bracelet can monitor pressure and intervene in multiple ways, and is suitable for teenagers.

A bone removal device configured to increase efficiency of total ankle surgery by enabling removal of resected portion of tibia from a patient is disclosed. In particular, the bone removal device may enable a resected portion of a bone, such as, but not limited to, a tibia, to be pulled from the bone. The bone removal device may be configured to be used in total ankle surgery on a tibia, in carpectomies on hand or wrists, and other surgeries in which assistance removing a resected portion of bone would be beneficial. The bone removal device may include one or more filaments to remove the resected tibia from the tibia. The bone removal device may include a bone removal device body supporting one or more arms which, in an open position, enable the bone removal device to pull the resected portion of bone from the bone.

The application provides a dexterous hand thumb, a dexterous hand and a robot, the dexterous hand thumb is provided with a first driving assembly in a shell of a carpal bone assembly, an output shaft of the first driving assembly is in transmission connection with a first end of a connecting frame assembly, so that the connecting frame assembly rotates around a second axis, the second axis is a central axis of the output shaft of the first driving assembly, a second end of the connecting frame assembly is in transmission connection with a first end of a metacarpal bone assembly; a central axis of the shell of the carpal bone assembly is a first axis, and the first axis is perpendicular to the second axis, an xy plane is a palm plane, and a yz plane is a wrist cross section, so that the minimum included angle between the first axis and the xy plane is greater than or equal to 25 degrees and less than 45 degrees, and the minimum included angle between the first axis and the yz plane is greater than or equal to 5 degrees and less than 23 degrees; in the case that the number of driving motors is limited, the dexterous hand thumb is more suitable for the moving mode of a human hand thumb, so that the bionic performance of the dexterous hand thumb is improved.