Vertebral Reduction Bracket with Distraction Rods
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Solution Overview
Problem
Current treatments for spondylolisthesis, such as open surgery, often lead to destabilization of surrounding bony structures and increased surgical trauma, while minimally invasive methods may not adequately correct vertebral displacement for effective spinal fusion.
Innovation Solution
A spondylolisthesis reduction system comprising a bracket, rods, and knobs, where the rods are inserted into vertebral parts and the knobs are tightened to reposition the vertebra, allowing for the subsequent insertion of a spinal implant to promote fusion, thereby correcting vertebral displacement and facilitating spinal stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If open surgery is used to correct spondylolisthesis, then vertebral displacement can be corrected, but surgical trauma and destabilization of surrounding bony structures increase
Solution Approach 1:
The surgical approach is segmented into two distinct phases: first, minimally invasive insertion of rods into vertebral parts through small incisions, and second, gradual distraction to correct vertebral displacement. This segmentation allows the surgeon to avoid large open incisions while still achieving the correction goal, thereby reducing surgical trauma and destabilization of surrounding structures.
Solution Approach 2:
The rods are inserted into the vertebral parts before the distraction correction is performed. This preliminary action of placing the rods minimally invasively first allows the subsequent distraction to be applied through the rod mechanism rather than requiring open surgical exposure during the correction phase, thus reducing overall surgical trauma.
2Object-affected harmful factors
If minimally invasive methods are used to treat spondylolisthesis, then surgical trauma is reduced, but vertebral displacement correction may be inadequate
Solution Approach 1:
The rod mechanism incorporates a dynamic distraction capability that allows gradual lengthening of the rod after initial minimally invasive insertion. This dynamic adjustment enables adequate vertebral displacement correction to be achieved through the minimally invasive approach, overcoming the limitation of static rod placement and ensuring effective spinal alignment.
Solution Approach 2:
The rod acts as an intermediary device that is first inserted minimally invasively and then serves as the mechanism for applying corrective distraction force. This intermediary approach allows the separation of the insertion trauma (minimized) from the correction mechanism (effective), enabling both reduced surgical trauma and adequate vertebral displacement correction.
3Stability of the object's composition
If traditional spinal fusion is performed, then spinal stabilization is achieved, but the procedure requires extensive surgical intervention
Solution Approach 1:
The invention extracts the essential function of spinal stabilization from the complex traditional fusion procedure. By using distractible rods that can be inserted minimally invasively and then distracted to correct vertebral displacement, the procedure achieves spinal stabilization without requiring extensive open surgery, bone grafting, or complex instrumentation associated with traditional fusion.
Data Source
AI summary
A system and method for reducing spondylolisthesis. The system includes a bracket comprising a first opening and a second opening, a first and second rod, and a first and second knob. The system may be placed onto a patient's back, the rods may be inserted through the first opening and the second opening and further into a first vertebral part and a second vertebral part. Tightening of a first knob and a second knob on the first and second rod allow for repositioning of the vertebra. Once repositioned, an interspinous implant may be inserted into the interspinous process space, connecting the vertebrae.