Multi-Balloon Brachytherapy with Pulsating Heat for Brain Tissue Sparing
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Solution Overview
Problem
Current treatments for glioblastoma, such as brachytherapy and radiotherapy, face challenges in effectively delivering radiation and hyperthermia without causing collateral damage to surrounding brain tissue, and there is a need for a more effective treatment modality that prolongs survival and quality of life.
Innovation Solution
A system and method utilizing a multi-balloon design that incorporates brachytherapy and hyperthermia, with voids and spacers to optimize radiation and heat distribution, allowing for simultaneous or sequential application of radiation and heat, and includes features like temperature sensors and drainage tubes to minimize tissue damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If brachytherapy is used to deliver radiation close to the tumor site, then the radiation dose to the target volume is improved, but the collateral radiation exposure to surrounding healthy tissue increases
Solution Approach 1:
The treatment is divided into multiple radiation delivery sessions (fractionation) where the total dose is administered in several smaller doses over time, allowing healthy tissues to recover between sessions while accumulating the therapeutic effect in the tumor
Solution Approach 2:
The brachytherapy source is inserted and removed periodically in a controlled manner, delivering radiation in timed intervals that allow surrounding healthy tissues to receive less cumulative exposure while the tumor receives the full therapeutic dose
2Reliability
If high radiation dose is delivered to the tumor site, then the treatment efficacy is improved, but the toxic threshold to surrounding brain tissue increases
Solution Approach 1:
The radiation source is placed directly within or adjacent to the tumor cavity, creating a highly localized high-dose region that spares surrounding healthy brain tissue from excessive radiation exposure
Solution Approach 2:
A balloon catheter is introduced as an intermediary device to deliver the radiation source precisely to the tumor site and to provide physical separation between the high-dose radiation field and surrounding healthy tissues
3Reliability
If hyperthermia is applied to enhance radiation efficacy, then the treatment effectiveness is improved, but the risk of thermal damage to surrounding tissue increases
Solution Approach 1:
Hyperthermia is applied continuously or intermittently during the radiation delivery process to maintain elevated temperatures that enhance radiation sensitivity throughout the entire treatment duration
Solution Approach 2:
The temperature parameter is carefully controlled and adjusted to optimize the thermal enhancement of radiation while remaining below the threshold for causing thermal damage to surrounding healthy tissues
4Manufacturing precision
If multiple treatment sessions are required to deliver adequate radiation dose, then the treatment precision is improved, but the treatment time and patient burden increase
Solution Approach 1:
The balloon catheter and radiation source are pre-positioned within the tumor cavity before treatment begins, eliminating the need for repeated insertions and positioning procedures across multiple sessions
Solution Approach 2:
The single balloon catheter device serves multiple functions including radiation delivery, hyperthermia application, and tumor cavity confinement, allowing all treatments to be administered through one implanted device rather than requiring separate procedures for each modality
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 system enhances the efficacy of radiation and hyperthermia treatment, improving local control and survival rates by minimizing toxic thresholds and optimizing dose delivery to tumor sites, enabling outpatient treatment with reduced collateral damage.
Implementation Method 1
a radioactive stent at or proximal to the resection site
Implementation Method 2
Radiation dose steeply decreases (e.g., exponentially) from close to the source out to the treatment site
Implementation Method 3
simultaneously or sequentially contacting the target site with radiation and heat
Data Source
AI summary
A method for treating a tumor excise site defined by a center and edges is described. The method includes simultaneously exposing the tumor site to radiation and pulsating heat. Also described is a device for treating tumors at a target site. The device includes a first balloon containing a radio isotope and a second balloon encasing the first balloon. The second balloon defines structures to create a void between the first balloon and the second balloon such that pulsing, temperature treated fluid traverses the void.