Vertebral Distraction Device with Segmented Expansion Control
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Solution Overview
Problem
Current methods for treating vertebral compression fractures, particularly those caused by osteoporosis and metastatic disease, face challenges in consistently restoring vertebral height due to uncontrolled expansion of balloon-like devices and unpredictable compaction of cancellous bone, leading to inadequate support and potential spinal deformity.
Innovation Solution
The development of minimally invasive bone distraction and support devices featuring ratcheting mechanisms and expandable structures that allow controlled distraction and support of vertebral fractures, enabling precise restoration of vertebral height through the use of biocompatible materials and fillers to stimulate bone growth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If balloon-like devices are inflated to restore vertebral height, then vertebral height restoration is achieved, but expansion is uncontrolled and occurs along path of least resistance
Solution Approach 1:
The balloon device is segmented into multiple independently controllable chambers or sections, allowing the operator to inflate specific segments in a controlled sequence rather than allowing uncontrolled omnidirectional expansion. This segmentation enables precise control over the expansion path and force distribution.
Solution Approach 2:
The balloon device incorporates dynamic control mechanisms such as adjustable inflation rates, programmable inflation sequences, or pressure-regulated valves that allow real-time control of the expansion process. This enables the operator to adapt the expansion behavior to the specific anatomical constraints and achieve controlled height restoration.
2Strength
If balloon-like devices are inflated to compact cancellous bone, then bone compaction occurs, but compaction is unpredictable and inconsistent
Solution Approach 1:
The system incorporates feedback mechanisms such as pressure sensors, force sensors, or imaging guidance that provide real-time information about the compaction process. This feedback allows the operator to adjust inflation parameters to achieve consistent and predictable bone compaction, ensuring reliable results across different patients and anatomical variations.
Solution Approach 2:
The device allows for controlled changes in inflation parameters such as pressure, volume, and inflation rate to optimize bone compaction. By systematically adjusting these parameters based on bone density, vertebral size, and fracture characteristics, the system achieves consistent and reliable compaction results.
3Object-affected harmful factors
If minimally invasive procedures are used to treat vertebral fractures, then patient trauma is reduced, but consistent height restoration becomes more difficult
Solution Approach 1:
The balloon device is designed to be nested within a delivery system or insertion tool that provides guidance and control during minimally invasive insertion. This nested configuration allows the device to be delivered through small incisions while maintaining the capability for controlled expansion and consistent height restoration once positioned within the vertebra.
Solution Approach 2:
An intermediary delivery system or positioning mechanism is used to facilitate minimally invasive insertion while ensuring accurate placement and controlled deployment of the balloon device. This intermediary system bridges the gap between minimally invasive access and the need for precise, consistent height restoration.
Data Source
AI summary
A device is disclosed for reducing a vertebral compression fracture, comprising a superior end plate and an inferior end plate disposed along a vertical axis. The superior end plate and the inferior end plate are slidably separable in a vertical direction along the vertical axis. An interior chamber is provided in fluid communication with a port extending from an exterior to the interior chamber. The device is deployable within a vertebral body and expandable within the vertebral body by injecting a flowable material into the interior chamber thereby displacing the superior and inferior end plates along the vertical axis.