Breast Brachytherapy Applicator for Anatomical Conformity
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Solution Overview
Problem
Current breast brachytherapy methods, such as whole breast radiation and limited field radiation, result in significant morbidity and anatomic deformity due to the need for extensive treatment periods and the use of fixed-shape delivery devices that do not accommodate irregularly shaped surgical cavities, limiting patient compliance and cosmetic outcomes.
Innovation Solution
A stable, semi-permanent or permanent platform is used to replicate the anatomical shape of the excised cancer bed, allowing for precise delivery of radiation therapy and reducing post-operative deformity by using a bioresorbable, biocompatible tissue support scaffold to maintain the pre-operative shape and facilitate accurate radiation dosing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If whole breast radiation is used to treat residual cancer tissue, then comprehensive radiation coverage is achieved, but treatment duration extends to 5-6 weeks and patient morbidity increases
Solution Approach 1:
The patent extracts and isolates the radiation treatment to only the lumpectomy cavity and immediate surrounding tissue, eliminating the need for whole breast radiation. This is achieved by placing the radiation source directly within the surgical cavity, delivering high-dose radiation only where cancer cells are most likely to remain, thereby reducing treatment duration from 5-6 weeks to a single fraction while maintaining oncologic control.
Solution Approach 2:
The patent applies local quality by concentrating the radiation dose precisely within the lumpectomy cavity and immediate pericavity tissue, rather than distributing it throughout the entire breast. The applicator design ensures that radiation intensity is highest at the cavity walls where residual cancer cells are most likely to exist, and decreases with distance from the cavity, thereby achieving comprehensive local coverage with minimal whole breast exposure.
2Device complexity
If fixed-shape delivery devices are used for brachytherapy, then device simplicity is maintained, but anatomical deformity occurs due to inability to accommodate irregularly shaped surgical cavities
Solution Approach 1:
The patent applies dynamics by designing an applicator system that transitions from a simple linear template to a dynamically adjustable three-dimensional structure. The template allows for customization of catheter positions and angles based on the specific geometry of each patient's lumpectomy cavity, enabling the device to adapt to irregular cavity shapes while maintaining relative structural simplicity through modular design.
Solution Approach 2:
The patent employs flexible principles through the use of adjustable catheters and positioning elements that can be configured to match the irregular contours of the surgical cavity. The applicator system includes flexible components that can be bent and positioned to conform to the cavity walls, ensuring optimal radiation delivery while preserving breast anatomy and avoiding deformity.
3Measurement precision
If multiple treatment rods are placed percutaneously for brachytherapy, then radiation dose precision is improved, but patient morbidity increases due to multiple skin entrance and exit sites
Solution Approach 1:
The patent merges multiple radiation delivery functions into a single pericavity applicator system. Instead of placing multiple separate treatment rods through the skin at different locations, all catheters are positioned through a single surgical access point at the lumpectomy site, consolidating multiple skin punctures into one larger incision that is already present from the lumpectomy procedure itself.
Solution Approach 2:
The patent uses the lumpectomy cavity itself as an intermediary structure to house and position all radiation-delivering catheters. The cavity acts as a natural receptacle that eliminates the need for separate percutaneous access points, as all catheters can be introduced through the existing surgical wound rather than requiring additional skin penetrations.
4Reliability
If extended period radiation treatment is required, then comprehensive tumor control is achieved, but patient compliance decreases due to burden of daily commuting and treatment schedule
Solution Approach 1:
The patent applies preliminary action by delivering the complete radiation treatment course in a single fraction or minimal fractions during the initial hospital admission following lumpectomy. This eliminates the need for patients to return for repeated treatments over weeks or months, as all necessary radiation delivery is accomplished during the initial surgical procedure or immediately postoperative period.
Solution Approach 2:
The patent achieves continuity of useful action by consolidating the entire radiation therapy course into one continuous treatment event rather than fragmented daily sessions. The single-fraction brachytherapy approach delivers the full therapeutic radiation dose in one uninterrupted session, eliminating gaps and interruptions that would otherwise require multiple patient visits and compromising compliance.
Data Source
AI summary
A breast brachytherapy applicator providing a stable semi permanent/permanent in dwelling platform that is configured to replicate anatomically the excised cancer bed and allows for a more precise anatomically correct delivery of limited field radiation treatment. This device may be used to reconstitute a resected tissue space to its pre-operative size and shape to 1) facilitate the accurate and precise delivery of adjunctive breast brachytherapy following breast cancer surgery and 2) prevent/decrease post-operative deformity as a result of surgical resection, whether for benign or malignant disease, and in particular after radiation treatment of malignant disease in the post lumpectomy patient.