90Y-Matrix Delivery for Localized Tumor Ablation
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Solution Overview
Problem
Current treatments for ductal carcinoma in situ (DCIS) and hepatocellular carcinoma (HCC) face challenges in reducing local recurrence and effectively managing small tumor sizes, with existing therapies often resulting in incomplete ablation and increased risk of distant metastases due to limitations in delivering high doses to restricted areas without causing significant side effects.
Innovation Solution
A 90Y-matrix delivery system comprising a combination of 90Y-coated microspheres and a carrier matrix, such as BIOGLUE, is used for direct, imaging-guided intra-tumoral injection to achieve effective radio-ablation of surgical margins and tumor sites, allowing for precise delivery of radiation to minimize side effects and maximize tumor control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external-beam radiotherapy is used to treat the entire breast, then local recurrence rate is reduced, but normal tissue tolerance is exceeded and side effects increase
Solution Approach 1:
The patent applies local quality by using a biodegradable matrix delivered directly to the tumor bed that selectively releases radiation only at the local site. This ensures high radiation dose to the tumor area while sparing surrounding normal breast tissue, resolving the contradiction between effective tumor control and normal tissue protection.
Solution Approach 2:
The biodegradable matrix acts as an intermediary carrier that transports and releases radiation locally. This mediator enables precise spatial control of radiation delivery, allowing high doses to the tumor bed without exposing normal tissues to harmful radiation levels.
2Reliability
If mastectomy is performed to ensure local control, then local recurrence is prevented, but patient quality of life and breast conservation are compromised
Solution Approach 1:
By delivering radiation locally to the tumor bed through a biodegradable matrix, the patent achieves mastectomy-level local control (98% at 5 years) while preserving the breast. The localized radiation delivery spares the rest of the breast tissue, enabling breast conservation without sacrificing oncological outcomes.
3Reliability
If high doses of radiation are delivered to restricted areas, then tumor control is improved, but side effects and normal tissue damage increase
Solution Approach 1:
The biodegradable matrix serves as an intermediary that enables high-dose radiation delivery to the tumor bed while controlling side effects. The matrix provides sustained local release over time, maintaining high doses to the tumor while the biodegradable nature ensures eventual elimination, reducing long-term toxicity.
Solution Approach 2:
The matrix releases radiation periodically over an extended period (up to 100 days) rather than as a single acute dose. This periodic release pattern maintains effective tumor control while allowing normal tissues time to repair, thereby reducing side effects.
4Reliability
If conventional radiotherapy is used, then treatment coverage is comprehensive, but treatment time and patient compliance are reduced
Solution Approach 1:
The radiation delivery system is implanted during surgery itself, performing the radiation treatment preparation in advance. The matrix then autonomously delivers the full radiation course over time without requiring multiple separate treatment sessions, eliminating the time loss associated with conventional fractionated radiotherapy.
Solution Approach 2:
The biodegradable matrix provides continuous radiation delivery over an extended period (up to 100 days) without interruption. This continuous action ensures comprehensive tumor bed coverage while eliminating the need for patients to return for multiple treatment sessions, improving compliance and reducing time loss.
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 90Y-matrix system enables safe and effective radio-ablation of surgical margins and tumor sites, reducing local recurrence and improving treatment outcomes for early-stage breast cancer and HCC by delivering high doses with minimal side effects, thereby addressing the limitations of existing therapies.
Implementation Method 1
90Y-coated microspheres
Implementation Method 2
90Y-matrix delivery system
Data Source
AI summary
Systems, kits and methods for preparing an injection system and/or treating target lesions with a selective internal radiation therapy which includes a double-barrel syringe loaded with a two-component tissue glue and radioisotope loaded microspheres. The microspheres are loaded into the syringe based on the size of the target location and are administered with a needle or dual-lumen catheter. Dosing regimens for treating breast cancer lesions or surgical beds up to 130 mm in diameter and hepatocellular carcinoma lesions up to 50 mm are included.