Dynamic Motion Analysis for Surgical Spinal Balance Correction
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Solution Overview
Problem
Current spinal surgical planning methods fail to consider the comprehensive, dynamic effects of spinal deformity corrections on the entire body's alignment and balance, leading to potential negative outcomes such as muscle pain, compensation mechanisms, and poor posture.
Innovation Solution
A patient-specific method involving dynamic motion analysis and simulation of spinal surgical corrections using motion capture technology to optimize spinal, pelvic, and lower limb parameters during movement, ensuring all alignment parameters fall within acceptable ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a localized surgical planning approach is used focusing on specific vertebrae, then the surgical procedure becomes simpler and more focused, but the overall body alignment and global balance are compromised leading to muscle pain and compensation mechanisms
Solution Approach 1:
The surgical planning process is segmented into multiple analysis phases: static image analysis, dynamic motion analysis, and simulation of surgical corrections. Each phase examines specific spinal segments and their effects on global balance separately, then integrates the findings into a comprehensive surgical plan that addresses both localized and global considerations.
Solution Approach 2:
The approach transitions from two-dimensional static spinal images to three-dimensional dynamic motion analysis. By capturing spinal deformity corrections during movement phases (standing, sitting, walking), the system adds the dimension of temporal dynamics, enabling evaluation of how surgical corrections affect global balance across different body positions and activities.
2Productivity
If a uniform standard approach is used for all subjects, then the planning process becomes more efficient and standardized, but it fails to account for individual variations in body structure and movement patterns resulting in suboptimal outcomes
Solution Approach 1:
The system applies local quality by analyzing and adjusting specific spinal segments and their unique biomechanical properties. Each subject's spinal anatomy, pelvic structure, and lower limb configuration are individually characterized, and the surgical plan is customized to address the specific deformities and balance requirements of that particular individual rather than applying a generic standard.
Solution Approach 2:
The approach utilizes parameter changes by measuring multiple alignment parameters (sagittal vertical axis, pelvic tilt, lumbar lordosis, knee flexion, chin-brow-to-vertical angle) and dynamically adjusting the surgical correction targets based on the subject's specific values and movement patterns. The simulation process iteratively modifies these parameters to predict and optimize post-surgical global balance for each individual.
3Loss of time
If static image analysis is used for spinal deformity assessment, then the analysis process is simpler and faster, but it cannot capture the dynamic effects of spinal corrections on body alignment during movement
Solution Approach 1:
The system performs preliminary action by first acquiring and analyzing static three-dimensional images of the spine, pelvis, and lower limbs to establish baseline anatomical parameters and deformity characteristics. This preliminary static analysis provides the foundation for subsequent dynamic motion analysis, allowing the system to efficiently compare pre- and post-surgical states across different movement phases without redundant imaging.
Solution Approach 2:
The approach embraces dynamics by incorporating motion capture technology to record spinal and bodily movements during various phases (standing, sitting, walking). The system analyzes dynamic alignment parameters such as changes in sagittal vertical axis, pelvic tilt, and lower limb positioning throughout the movement cycle, providing precise measurement of how spinal corrections affect global balance during actual use rather than just in static position.
4Measurement precision
If comprehensive dynamic motion analysis is performed on the entire body, then the surgical planning becomes more accurate and holistic, but the analysis process becomes more complex and time-consuming
Solution Approach 1:
The system applies universality by using a single integrated motion capture setup and software platform to perform multiple functions: acquiring static three-dimensional anatomical data, capturing dynamic motion data across various phases, measuring alignment parameters, simulating surgical corrections, and predicting post-surgical outcomes. This multi-functional approach consolidates what would otherwise require multiple separate systems and analyses into one comprehensive platform, reducing overall complexity despite the comprehensive nature of the analysis.
Data Source
AI summary
An exemplary method of determining a surgical spinal correction for a subject using analysis of motion capture images of the subject, which uses the steps of obtaining pre-operative three-dimensional images of a spinal region, obtaining a pre-operative time sequenced set of images of the subject during a movement progression of said subject, calculating in a plurality of the motion capture images, alignment parameters relating to upper and lower body regions of the subject, and determining if any of the calculated alignment parameters are outside their predetermined acceptable ranges in one or more of the images, iteratively adjusting anatomical elements in three-dimensional images until all of the calculated alignment parameters are within their predetermined acceptable ranges; and adjusting spinal anatomy in the three-dimensional images according to the degree of adjustment of spinal parameters in the motion capture images to determine a surgical spinal correction.