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CN-122005036-A - Hip joint reduction auxiliary device in hip joint replacement

CN122005036ACN 122005036 ACN122005036 ACN 122005036ACN-122005036-A

Abstract

The invention relates to the field of digital orthopaedics and computer-assisted surgery, in particular to a hip joint resetting auxiliary device in hip joint replacement operation, which comprises a multidimensional data acquisition module, a soft tissue characteristic decoupling module, a tension safety judgment module and a resetting decision feedback module, wherein a system utilizes end sensing arrays to synchronize mechanical and kinematic data in real time to construct force-displacement mapping, the core of the system is to introduce a rheological model to carry out speed compensation, eliminate viscous resistance interference generated by operation speed, accurately extract soft tissue instantaneous stiffness coefficient, compare biomechanical threshold values according to the viscous resistance interference to recommend prosthesis parameters, solve the problem that elastic deformation and movement viscous resistance cannot be distinguished, eliminate dependence on doctor hand feeling and operation speed, and realize accurate quantitative evaluation of resetting tension.

Inventors

  • LI MENGXIA
  • LI YAJIE
  • WANG HAOFENG

Assignees

  • 中国人民解放军联勤保障部队第九八九医院

Dates

Publication Date
20260512
Application Date
20260325

Claims (8)

  1. 1. A hip reduction assistance device for a hip arthroplasty, comprising: the multi-dimensional surgical scene data real-time acquisition module is used for acquiring axial traction data, rotation moment data and spatial displacement data and attitude angle data of the femoral head relative to the acetabular side (600) applied to the femoral side (200) in real time through a sensing array (110) integrated to the reset execution end (100), and performing timestamp synchronization on the axial traction data, the rotation moment data, the spatial displacement data and the attitude angle data to generate a multi-dimensional reset data stream; The soft tissue viscoelastic characteristic dynamic decoupling module is used for receiving the multidimensional reset data stream, constructing a force-displacement relation map of the axial traction data relative to the space displacement data, and calculating a derivative of the force-displacement relation map to obtain an instantaneous stiffness coefficient representing the instantaneous tension characteristic of the soft tissue; The tension envelope safety state judging module is used for acquiring a preset biomechanical stable region, wherein the biomechanical stable region is defined by a lower limit threshold value and an upper limit threshold value, and comparing the instantaneous stiffness coefficient with the lower limit threshold value and the upper limit threshold value in a numerical mode to judge whether the soft tissue tension state under the current resetting operation is in the biomechanical stable region or not and generate a tension state evaluation result; And the resetting quality feedback and decision-making auxiliary module is used for responding to the tension state evaluation result, generating a corresponding touch or visual feedback signal, calculating the numerical deviation of the instantaneous stiffness coefficient and the boundary value of the biomechanical stable interval, and determining recommended prosthesis specification adjustment parameters based on the numerical deviation.
  2. 2. The hip reduction assistance device in hip replacement according to claim 1, wherein the multi-dimensional surgical scene data real-time acquisition module comprises: a mechanical sensing unit for sensing the axial traction data and the rotational torque data using a multi-dimensional force sensor array (110); the space pose tracking unit is used for monitoring the space displacement data and the pose angle data in real time by utilizing an inertia measuring unit (130) or an optical mark to be matched with a stay wire type displacement meter (140); and the data synchronization unit is used for aligning the data acquired by the mechanical sensing unit and the space pose tracking unit according to a unified time reference so as to generate the multidimensional reset data stream.
  3. 3. The hip reduction assistance device in a hip arthroplasty of claim 1 wherein the soft tissue viscoelastic feature dynamic decoupling module is configured to: Filtering and denoising the multidimensional reset data stream to remove operation tremor noise; correlating the axial traction data with the spatial displacement data over a time domain to plot a force-displacement characteristic curve; And calculating the tangential slope of the force-displacement characteristic curve at the current moment to obtain the instantaneous stiffness coefficient.
  4. 4. The hip replacement assist device according to claim 1, wherein the tension envelope safety condition determination module is configured to: If the instantaneous stiffness coefficient is lower than the lower threshold of the biomechanical stability zone, generating a low tension alarm representing joint relaxation and dislocation risk as the tension state evaluation result; if the instantaneous stiffness coefficient is higher than the upper threshold of the biomechanical stability zone, generating a high-tension alarm representing the risk of nerve damage and abrasion as the tension state evaluation result; And if the instantaneous rigidity coefficient is in the biomechanical stable region, generating a tension adaptation confirmation signal representing successful resetting as the tension state evaluation result.
  5. 5. The hip replacement hip reduction assistance device according to claim 4, wherein the reduction quality feedback and decision assistance module is configured to: Calculating a difference between the instantaneous stiffness coefficient and the lower threshold in response to the low tension alarm, and matching a prosthesis model number suggestion for increasing eccentricity or neck length from a preset prosthesis specification database based on the difference; In response to the high tension alert, a difference between the instantaneous stiffness coefficient and the upper threshold is calculated and based on the difference, a prosthesis type number recommendation for reducing eccentricity or neck length is matched from the pre-set prosthesis specification database.
  6. 6. The hip reduction assistance device in a hip arthroplasty of claim 1 wherein the soft tissue viscoelastic feature dynamic decoupling module is further configured to: based on the rotation moment data and the attitude angle data, constructing a rotation stability analysis relation of moment along with angle change; calculating the change rate of moment relative to angle under different buckling and external rotation angles to generate a rotation stability index representing the anti-dislocation capability; the tension envelope safety state determination module is further configured to incorporate the rotational stability indicator into a determination logic of the biomechanical stability zone.
  7. 7. The hip replacement intra-hip reduction assistance device according to claim 1, wherein the reduction quality feedback and decision assistance module comprises: A tactile feedback unit for controlling the handle actuator (150) to generate vibrations of different frequencies when the tension state evaluation result indicates that the tension is too high or too low; and the visual interaction unit is used for displaying the relative position of the instantaneous rigidity coefficient relative to the biomechanical stable zone on a display interface or an indicator light ring (170) in real time.
  8. 8. The hip replacement assisting device according to claim 1, wherein the biomechanical stability zone is a continuous numerical zone containing a tension safety range, which is trained by a machine learning model, based on soft tissue tension data of a historic operation case and a patient body type parameter as input features, and with postoperative dislocation rate data as an evaluation tag.

Description

Hip joint reduction auxiliary device in hip joint replacement Technical Field The invention relates to the technical field of digital orthopaedics and computer-aided surgery, in particular to a hip joint resetting auxiliary device in hip joint replacement. Background In the resetting link of total hip replacement operation, the tension state of the soft tissue around the hip directly determines the biomechanical stability after the joint operation and the rehabilitation effect of a patient, the existing resetting evaluation scheme mainly depends on a tactile feedback of a doctor hand or a basic force measuring device, the tightness degree of the soft tissue is judged by sensing the total resistance in the traction process, and the neck length or the eccentric distance specification of a prosthesis test model is selected according to the total resistance, however, the biological soft tissue has obvious viscoelastic physical characteristics, the externally presented mechanical response of the biological soft tissue is highly dependent on elastic deformation and viscous damping generated by the operation speed, the existing scheme is difficult to strip the viscous resistance caused by the difference of the operation speed from the total traction force, the acquired rigidity data contains a large amount of artifacts generated by the speed of push-pull and cannot reflect the inherent elastic properties of the soft tissue, in addition, the traditional monitoring method is difficult to identify the potential unstable risk of the neck length or the eccentric distance of the prosthesis test model due to the lack of a high-precision time synchronization mechanism of the mechanical data and the force-displacement hysteresis error, the traditional monitoring means often generates the quantitative basis of the prosthesis selection, and the dislocation of the joint after the operation or the nerve abrasion caused by the excessive tension and the prosthesis abrasion caused by the excessive tension difference easily occurs. Therefore, how to eliminate the interference of viscous damping and motion artifacts in the resetting operation to accurately extract the instantaneous stiffness of the soft tissue, and accordingly realize the quantitative determination of the tension safety state and the accurate auxiliary decision of the prosthesis specification is a technical problem to be solved. Disclosure of Invention In view of the above-mentioned shortcomings of the prior art, an object of an embodiment of the present invention is to provide a hip joint replacement assisting device, which can solve the technical problems existing in the prior art, and specifically, the technical scheme of the present invention includes: The multi-dimensional operation scene data real-time acquisition module is used for acquiring axial traction data, rotation moment data and spatial displacement data and attitude angle data of the femoral head relative to the acetabular side in real time through a sensing array integrated at the reset execution end, and performing time stamp synchronization on the axial traction data, the rotation moment data, the spatial displacement data and the attitude angle data to generate a multi-dimensional reset data stream; The soft tissue viscoelastic characteristic dynamic decoupling module is used for receiving the multidimensional reset data stream, constructing a force-displacement relation map of the axial traction data relative to the space displacement data, and calculating a derivative of the force-displacement relation map to obtain an instantaneous stiffness coefficient representing the instantaneous tension characteristic of the soft tissue; The tension envelope safety state judging module is used for acquiring a preset biomechanical stable region, wherein the biomechanical stable region is defined by a lower limit threshold value and an upper limit threshold value, and comparing the instantaneous stiffness coefficient with the lower limit threshold value and the upper limit threshold value in a numerical mode to judge whether the soft tissue tension state under the current resetting operation is in the biomechanical stable region or not and generate a tension state evaluation result; And the resetting quality feedback and decision-making auxiliary module is used for responding to the tension state evaluation result, generating a corresponding touch or visual feedback signal, calculating the numerical deviation of the instantaneous stiffness coefficient and the boundary value of the biomechanical stable interval, and determining recommended prosthesis specification adjustment parameters based on the numerical deviation. Preferably, the multi-dimensional operation scene data real-time acquisition module comprises: the mechanical sensing unit is used for sensing the axial traction data and the rotation moment data by utilizing a multidimensional force sensor array; The space pose tracking unit is used for moni