Biodegradable Tissue Markers for Stable Surgical Margin Imaging
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Solution Overview
Problem
Existing methods for visualizing and stabilizing tissue gaps post-surgical removal of cancerous tissues, such as breast cancer, are inadequate, leading to poor margin definition and increased radiation exposure to healthy tissues due to shifting cavity margins.
Innovation Solution
Conformal filling of surgical sites with biodegradable hydrogels or small, pliable particles that include radioopaque agents, providing precise visualization and stabilization of tissue margins, thereby allowing for accurate radiation targeting and reduced seroma formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If clips are used to mark surgical sites, then the procedure is simple, but the resolution of tissue margins is poor
Solution Approach 1:
The patent extracts the marking function from simple clips and distributes it throughout the entire implant material. Radioopaque particles are incorporated into the implant matrix, allowing the entire implant to serve as a visible marker rather than relying on discrete clips, thereby improving margin resolution while maintaining procedural simplicity
Solution Approach 2:
The patent applies the principle of visual contrast by incorporating radioopaque materials that create detectable differences in imaging. The implant contains radiopaque particles or compounds that appear distinct on imaging modalities, enabling clear visualization of tissue margins and implant boundaries without increasing device complexity
2Reliability
If no implant is placed in the surgical site, then the procedure is simple, but seroma formation occurs and margins cannot be visualized
Solution Approach 1:
The implant serves multiple functions simultaneously: it provides structural support to prevent seroma formation, acts as a visual marker through radioopaque materials, and maintains tissue margin stability. This multi-functionality improves reliability without significantly increasing device complexity, as a single material accomplishes what would otherwise require multiple separate interventions
Solution Approach 2:
The implant material inherently provides both structural stabilization and radiographic visibility without requiring additional separate components or procedures. The radioopaque particles are integrated into the implant matrix itself, allowing the material to serve its own marking function while providing structural support, thereby simplifying the overall device rather than complicating it
3Stability of the object's composition
If seroma forms in the surgical site, then the cavity is naturally filled, but the seroma changes shape and size affecting radiation plans
Solution Approach 1:
The implant is placed immediately during surgery to prevent seroma formation before it can occur. By providing structural support and filling the cavity at the time of surgery, the implant eliminates the need for seroma to form, thereby ensuring consistent geometry from the outset and maintaining accurate radiation targeting throughout the treatment course
Solution Approach 2:
The implant counteracts the tendency for seroma formation by providing immediate structural support and filling the surgical cavity. This preliminary anti-action prevents the harmful effect of seroma accumulation, ensuring that the tissue margins and site geometry remain stable and predictable for radiation therapy planning
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The hydrogel implants effectively stabilize and delineate tissue margins, enabling reduced treatment expansions and decreased radiation exposure to nearby healthy tissues while improving cosmesis by filling the cavity and preventing deformation.
Implementation Method 1
reacting precursors with each other that form the implant when they react with each other. A crosslinked hydrogel can be formed in-situ
Implementation Method 2
Radioopaque agents may be included with the implants, either covalently attached or mixed within the materials
Data Source
AI summary
Implantable materials may be used in an iatrogenic site. Applications include radioopaque materials for fiducial marking.