Surgical Distractor with Cable Lasso for Vertebral Manipulation
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Solution Overview
Problem
Current surgical methods for treating spinal disorders, such as scoliosis and kyphosis, face challenges in effectively manipulating and stabilizing vertebrae, particularly in cases of complex deformities and difficult anatomy, where existing instruments may interfere with the surgical field and fail to provide adequate correction and stabilization.
Innovation Solution
A surgical system comprising a distractor with a stainless steel cable forming a lasso that can loop around bone screw shanks, allowing for distraction and compression of vertebral tissue while minimizing interference, and featuring modular arms and feet for adjustable configurations to accommodate varying anatomies and screw trajectories.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional spinal implants and surgical instruments are used for manipulation and stabilization, then basic spinal correction can be achieved, but the instruments interfere with the surgical field and fail to provide adequate correction in complex deformities
Solution Approach 1:
The surgical distractor is divided into separate modular components including a body, cable, loop, and arms. This segmentation allows the loop to be positioned and manipulated independently, reducing interference with the surgical field while maintaining effective vertebral manipulation capability.
Solution Approach 2:
The loop is extracted as a separate functional element that can be disposed about the bone screw shank independently from the main instrument body. This extraction allows the loop to engage the implant without the bulk of the traditional instrument interfering with the surgical field.
2Adaptability or versatility
If fixed configuration surgical instruments are used, then instrument simplicity is maintained, but they fail to accommodate varying anatomies and screw trajectories in complex cases
Solution Approach 1:
The surgical distractor incorporates movable arms that can be adjusted to different positions and orientations. This dynamic configuration allows the instrument to adapt to varying anatomical structures and screw trajectories while maintaining a relatively simple overall device structure.
Solution Approach 2:
The adjustable arms and loop configuration enable the surgical distractor to accommodate multiple anatomical variations and surgical scenarios. A single device can adapt to different vertebral levels, curvature types, and implant positions, providing universal applicability without requiring multiple specialized instruments.
3Measurement precision
If traditional distraction methods are used, then basic vertebral separation can be achieved, but precise manipulation and stabilization are insufficient for complex deformities
Solution Approach 1:
The cable acts as an intermediary element connecting the loop to the bone screw shank. This intermediary mechanism allows for precise control and measurement of vertebral separation while maintaining stable engagement with the spinal implant, enabling both precision and reliability in complex deformity correction.
Solution Approach 2:
The surgical distractor allows for controlled changes in the parameters of vertebral separation through the cable and loop mechanism. The system can precisely adjust distraction forces and positions, enabling accurate manipulation while maintaining stabilization throughout the correction process.
Data Source
AI summary
A surgical instrument comprises a first arm including a first closed loop engageable with a first spinal implant disposed with a first vertebral surface. A second arm is movable relative to the first arm and includes a second closed loop engageable with a second spinal implant disposed with a second vertebral surface. Surgical systems, constructs, implants and methods are disclosed.