7 results about "Tissue elasticity" patented technology

This invention relates to the field of postoperative wound management technology, specifically to a method for intervening in abnormal scar hyperplasia after a cesarean section. The method includes the following steps: based on linear scar detection sites on the abdominal wall, the rebound temporal distribution characteristics are obtained; based on the changes in the rebound sequence, a segmented scar location structure is formed; the segmental nursing interval sequence is determined by combining the rebound arrangement relationship of each segment; nursing execution data is then generated according to the segmental location; and nursing rhythm changes are generated based on the differences in retesting. This invention calculates the recovery ratio based on displacement record changes and determines the rebound sequence to obtain temporal characteristics. By analyzing the internal temporal density, the order of segmental nursing is adjusted; the currently initiated segment is selected to optimize the application execution data; the records are rearranged to establish the nursing rhythm; and the unified treatment is transformed into a dynamic zonal intervention based on tissue elasticity. This eliminates the drawbacks of blind operation and ensures precise inhibition of tension concentration areas, comprehensively enhancing the targeted control of abnormal hyperplasia and improving the overall repair quality.

The application discloses a face plastic surgery effect prediction method and system based on three-dimensional reconstruction, and relates to the technical field of image recognition. The method comprises the following steps: obtaining face original three-dimensional point cloud data of a surgery receiver, surgery adjustment parameters and individual physical parameters; constructing initial coupling proportion field data; inputting the surgery adjustment parameters into a directional stress release model, combining skin line direction data to calculate asymmetric stress vector data, and performing spatial orientation correction on the initial coupling proportion field to obtain asymmetric deformation trend data, which is input into a time rebound prediction model to generate time evolution prediction data in combination with individual physical parameters and tissue elastic characteristics; limiting local volume increment in the prediction data according to a scar tendency weight, generating target postoperative deformation prediction data, and performing component decomposition to output multi-dimensional interpretable deformation decomposition results. The application realizes high-precision and interpretable prediction of the soft tissue dynamic deformation process of the surgery effect.

Described herein are devices, systems, and methods relating to monitoring the elasticity of soft biological tissues, for example, in the gastrointestinal tract. Described herein are embodiments of a wirelessly actuated palpation mechanism integrated into a swallowable capsule device, offering in situ tissue elasticity measurement with minimal invasiveness. Such approach can employ a magnetic soft cantilever beam actuated by external magnetic fields to gently press against soft tissue. Mechanical stress and strain can be monitored by an onboard magnetic sensor and a strain gauge, allowing for accurate assessment of tissue elasticity. Additionally, wireless modules utilizing Bluetooth Low Energy and powered by a battery can facilitate real-time communication. The device and system operates under external magnetic field control, which can move freely over soft tissues during examinations and palpate suspicious areas

This invention relates to the field of blood collection technology, and provides an automatic blood collection needle positioning method based on multi-parameter fusion. The method includes: collecting blood flow activity characteristic parameters of the target body's blood collection area within a historical period, analyzing the blood flow activity characteristic values ​​to determine whether the blood flow effectiveness within the target body's blood collection area meets the standard; when the blood flow effectiveness within the target body's blood collection area meets the standard, collecting tissue elasticity characteristic parameters of the blood vessel segment within the target body's blood collection area, analyzing the tissue elasticity characteristic values ​​to determine whether the blood collection needle positioning reliability meets the standard; when the blood collection needle positioning reliability does not meet the standard, determining a processing strategy to determine the adjustment range of the blood flow activity characteristic threshold. This invention improves the efficiency of automatic blood collection needle positioning.

This specification provides a method and system for extracting the mechanical features of vascular tissue, comprising the following steps: multi-level stress loading: applying a multi-level external stress sequence to a superficial vascular region via a force-controlled actuator; steady-state verification: monitoring the stress signal at the contact interface in real time after each level of stress loading; temporal synchronous triggering: sending a trigger command to the ultrasound probe only when the mechanical boundary is determined to be in a steady state; modulus calculation: calculating the tissue elastic modulus based on imaging sampling data; multi-level looping: repeating the above steps to complete the elastic modulus measurement under multi-level stress conditions; response feature extraction: constructing a response relationship based on the stress-elasticity dataset and extracting feature parameters characterizing the nonlinear mechanical behavior of the tissue. By establishing a triple steady-state verification mechanism, a deterministic temporal synchronous coupling relationship is constructed between the mechanical state determination and the SWE excitation command, and the nonlinear elastic response features of the tissue are obtained under multi-level controllable stress conditions.

The application discloses a locking device, a tissue ligation device and an endoscope surgical instrument, and belongs to the technical field of medical instruments. A locking part and an elastic part are arranged in the inner cavity of the shell of the locking device. The elastic part can generate an elastic force due to elastic deformation of the elastic part, and the elastic force is applied to the locking part to continuously press the locking part. The first threading hole and the second threading hole of the shell and the threading channel of the locking part can be used for threading a medical wire, so that the locking part can press the medical wire threaded in the threading channel of the locking part on the shell, thereby fixing the medical wire and realizing locking of the medical wire. Moreover, since the elastic force of the elastic part continuously acts on the locking part, the medical wire can be continuously pressed, the situation that the medical wire is loosened due to tissue peristalsis or tissue elasticity is reduced, and the operation efficiency and the operation success rate are improved.

This invention relates to the field of orthopedic medical technology and discloses a method and system for preoperative planning of bone and joint replacement surgery. The method includes acquiring medical images to construct a three-dimensional model of the skeleton and identifying joint movement trajectories; marking anatomical reference points to calculate the ideal orientation of the joint movement axis and establish a virtual reference system; simulating contact pressure distribution under different activity angles and calculating stress distribution maps of the implant at multiple locations; selecting an installation position that homogenizes contact pressure to generate a preliminary plan; combining the elastic modulus of soft tissue to calculate the ligament tension change curve and adjusting the implant orientation to generate a balanced optimization plan; and finally simulating the postoperative dynamic process to predict abnormal loads and reverse-correcting parameters to generate the final execution plan.