Vertebral Containment Jacket for Cement Leakage Prevention
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Solution Overview
Problem
Current methods for treating vertebral fractures, such as vertebroplasty and kyphoplasty, face challenges with cement leakage and inadequate height restoration, necessitating the development of more effective stabilization and height maintenance techniques.
Innovation Solution
A containment assembly with a dividing wall is deployed inside the bone to prevent cement leakage and maintain vertebral height, utilizing a containment jacket and balloon assembly to ensure proper placement and expansion of filler material within the vertebral body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vertebroplasty or kyphoplasty is performed using traditional methods, then vertebral fracture stabilization is achieved, but cement leakage occurs leading to complications
Solution Approach 1:
The containment jacket is divided into multiple segments or zones along its length, with each segment capable of independent expansion or controlled cement injection. This segmentation allows precise control over cement placement and prevents uncontrolled leakage by containing cement within specific segments while maintaining the ability to stabilize the entire vertebral body.
Solution Approach 2:
The containment jacket acts as an intermediary device between the cement injection system and the vertebral body. It provides a controlled interface that directs cement flow into the bone while preventing leakage into surrounding tissues, thus mediating between the need for effective cement delivery and the need to prevent harmful leakage.
2Reliability
If traditional vertebroplasty or kyphoplasty is performed, then fracture stabilization is achieved, but inadequate height restoration occurs
Solution Approach 1:
The containment jacket is expanded to the desired vertebral height before cement injection occurs. This preliminary expansion establishes the correct vertebral shape and height, creating a mold that guides subsequent cement placement. The jacket maintains this pre-established geometry throughout the cement setting process, ensuring proper height restoration is achieved.
Solution Approach 2:
The containment jacket utilizes controlled changes in expansion parameters (radius, length, cross-sectional shape) to restore vertebral height. By adjusting these geometric parameters during deployment, the system can precisely control the restored vertebral dimensions while maintaining fracture stabilization through subsequent cement injection.
3Object-generated harmful factors
If a containment jacket is deployed to prevent cement leakage, then cement containment is improved, but device complexity increases
Solution Approach 1:
The containment jacket is constructed from flexible, thin-walled material that can be collapsed for minimally invasive insertion through small percutaneous access points. Once inside the vertebral body, the jacket expands to provide full containment. This flexible shell design provides effective cement containment while maintaining a relatively simple, single-piece structure that reduces overall device complexity.
Solution Approach 2:
The containment jacket is designed to be nested within or around the balloon catheter system used for vertebral body expansion. This nesting allows both functions (containment and height restoration) to be integrated into a single deployable system, reducing the number of separate components needed and simplifying the overall device architecture while maintaining effective cement containment.
Data Source
AI summary
Methods and apparatus for treating bones, including, in one or more embodiments, methods and apparatus for treatment of vertebral fractures that include a containment assembly for cement containment and/or a balloon assembly for maintaining vertebral height. A containment assembly comprising a containment jacket adapted to be deployed inside bone; and a dividing wall that separates the interior of the containment jacket into a proximal region and a distal region, the dividing wall having an opening for providing access to the distal region from the proximal region.