34 results about "Limb length" patented technology

A CAS system and method for guiding an operator in inserting a femoral implant in a femur as a function of a limb length and orientation of the femoral implant with respect to the femur, comprising a reference tool for the femur, a registration tool, a bone altering tool and a sensing apparatus. A controller is connected to the sensing apparatus to: i) register a frame of reference of the femur by calculating surface information provided by the registration tool as a function of the position and orientation of the registration tool provided by the sensing apparatus, and / or retrieving in a database a model of the femur; ii) calculate a desired implant position with respect to the frame of reference as a function of the limb length; and iii) calculate a current implant position and orientation in relation to the desired implant position with respect to alterations being performed in the femur with the bone altering tool, as a function of the position and orientation of the bone altering tool provided by the sensing apparatus and of a digital model of a femoral implant provided by the database. The database is connected to the controller for the controller to store and retrieve information relating to an operation of the controller. The computer-assisted system may be used to guide an operator in inserting a pelvic implant in an acetabulum as a function of an orientation of the pelvic implant with respect to the pelvis.

A CAS system and method for guiding an operator in inserting a femoral implant in a femur as a function of a limb length and orientation of the femoral implant with respect to the femur, comprising a reference tool for the femur, a registration tool, a bone altering tool and a sensing apparatus. A controller is connected to the sensing apparatus to: i) register a frame of reference of the femur by calculating surface information provided by the registration tool as a function of the position and orientation of the registration tool provided by the sensing apparatus, and / or retrieving in a database a model of the femur; ii) calculate a desired implant position with respect to the frame of reference as a function of the limb length; and iii) calculate a current implant position and orientation in relation to the desired implant position with respect to alterations being performed in the femur with the bone altering tool, as a function of the position and orientation of the bone altering tool provided by the sensing apparatus and of a digital model of a femoral implant provided by the database. The database is connected to the controller for the controller to store and retrieve information relating to an operation of the controller. The computer-assisted system may be used to guide an operator in inserting a pelvic implant in an acetabulum as a function of an orientation of the pelvic implant with respect to the pelvis.

The invention relates to the technical field of medical devices, in particular to a clinical limb rehabilitation device, which includes a base, a seat is arranged on the upper end of the base, an L-shaped bar is arranged on the upper end of the seat, and the lower end of the L-shaped bar is connected to There is an exercise device, the output shaft of the first motor is connected with a long rod, the upper end of the support rod is provided with an arc block, the upper end of the arc block is provided with a groove, and the side wall of the arc block There is an arc-shaped groove connected to the groove, the upper end of the groove is inserted with a fixed plate, the lower end of the fixed plate is provided with a support shaft matching the arc-shaped groove, and the support shaft matches the long rod, The upper end of the fixed plate is provided with Velcro, and the side wall of the fixed plate is provided with a spring connected with the seat. The invention can not only perform rehabilitation training on the upper and lower limbs of the patient at the same time, but also meet the use requirements of patients with different limb lengths, and has strong practicability.

A multiaxial combined and matched type anti-infection semi-pelvic false body comprises an acetabulum and net cup plate wing which is arranged on the top of the acetabulum and can be fixed on a reserved hip bone wing. Two to three universal joints are arranged on the back of the net cup plate wing. The universal joints are opened with a card slot which can be connected with a universal bar. The invention can arbitrarily adjust the height and the point of view of the acetabulum through the combination of the universal joints and the acetabulum to realize the truly anatomical location reconstruction of the hip joint which is not affected by the resection range. The reconstruction of the connection of the pelvic ring and the acetabulum takes the way of universal multi-axis in order to conveniently adjust the location of the acetabulum, thereby assuring the coherence of the limb length after being reconstructed. The location of the acetabulum can be adjusted according to the removal situation of the soft tissue in the operation. Through the sacrum and the contact point of the universal screw of the ischiopubic multi-axis point driven into the pelvic ring, especially multi-nail fixationdriven into the lumbar, the hardening stress can be scattered, the hardening stress concentration can be reduced to reduce the complicating disease such as looseness and broken nails.

The invention discloses a rope-driven three-degree-of-freedom training robot, which includes a robot body and an active and passive hybrid drive system. Training can avoid joint misalignment between the user and the robot, and can adapt to different limb lengths, reduce the user's load weight, effectively increase the comfort of training, and improve training efficiency. The active and passive hybrid drive system can During the training process, it provides force feedback with large output and high bandwidth to assist patients in rehabilitation training.

The invention discloses a measurer of the eccentric distance of a hip joint and the extended limb length. The scaled long straight section of an L-shaped limb length measuring rod (4) is fixedly connected with a scaled pointer (5) by a first cross connector (3); the short straight section of the L-shaped limb length measuring rod (4) is fixedly connected with one end of an eccentric distance measuring rod (2) by a second cross connector (6); the other end of the eccentric distance measuring rod (2) is fixedly connected with a positioning kirschner pin (1) by a universal connector (7); and thepinpoint of the scaled pointer (5) faces to one end where the positioning kirschner pin (1) is arranged. The measurer is accurate to measure, changes the limitation of the prior measurer aiming at measuring the limb length, simultaneously obtains two important measured data and fills in a gap that eccentric distance measurement can not be realized in a manual full hip joint replacement operation;and the measurer is convenient to dismount, does not influence the operation of an operation view and saves the operation time.

The invention discloses a multi-functional portable retractor for the osteology department and belongs to the field of medical appliances. The multi-functional portable retractor for the osteology department disclosed by the invention comprises a main body, a telescopic arm and an embedded connecting assembly, wherein a main body fixation clamp is disposed on one end of the main body; the telescopic arm which can stretch out from the other end is disposed inside the main body; the telescopic arm is telescopic relative to the main body; and the end part of the telescopic arm is connected to a traction arm by the embedded connecting assembly. The retractor disclosed by the invention is mainly used to solve the technical problem in accurate control of human body limb traction during operations, treatments and recovery; by the multi-functional portable retractor for the osteology department disclosed by the invention, a doctor can explicitly determine a traction distance during use and ensure a precise limb length of a patient; and force saving, torsion increase and efficiency are taken into account, so that optimal effects in aspects such as the force saving, torsion increase and working efficiency increase can be achieved.

The invention discloses a dummy model design method for a crash test reflecting a driver protection posture to solve the problems that an existing dummy model cannot reflect protection postures like bending and stretching of limbs of a driver when a crash happens and is not high in biological simulation. The dummy model design method for the crash test reflecting the driver protection posture comprises the following steps that protection postures are collected, a crash site is reappeared so as to enable the driver to generate protection postures and achieve the collection of the protection postures at different vehicle speeds; dummy model parameters are designed, the dummy model parameters are designed correspondingly through confirmation of the limb length and joint positions of the driver; the dummy model protection postures are designed: the protection postures of the dummy model when the crash happens is designed; crash parameters are output: display of limb motion of the dummy model during the crash process is achieved, crash parameters are output and displayed, and evaluation is conducted on the biological simulation of the dummy model.