RF-Enabled Inflatable Bone Tamp for Controlled Tumor Ablation
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Solution Overview
Problem
Current radio frequency ablation (RFA) procedures face challenges in precisely controlling temperature to effectively destroy cancerous tissue while minimizing damage to surrounding healthy tissue, as excessive temperatures can lead to tissue desiccation and charring, impeding treatment efficacy.
Innovation Solution
An RF-enabled inflatable bone tamp with a temperature or impedance-based feedback system is used, featuring a cannula with a balloon and RF electrodes to deliver controlled RF energy, monitoring tissue desiccation and employing active or passive cooling to maintain precise temperature control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high RF energy is delivered to destroy cancerous tissue, then tumor ablation efficacy is improved, but temperature control becomes difficult leading to tissue desiccation and charring
Solution Approach 1:
The patent employs a temperature feedback system with sensors that continuously monitor tissue temperature during RF ablation. The system adjusts RF energy delivery based on real-time temperature measurements, preventing excessive heating that causes desiccation and charring while ensuring sufficient heat for complete tumor destruction. This closed-loop control resolves the contradiction between achieving effective ablation and maintaining temperature control.
Solution Approach 2:
The system dynamically changes RF energy parameters (power, frequency, duration) based on real-time temperature measurements and tissue response. By adjusting these parameters during the procedure, the system maintains optimal temperature ranges for tumor destruction without causing harmful overheating, thus resolving the contradiction between ablation efficacy and temperature control.
2Reliability
If RF energy is delivered to thermally ablate tissue, then pathological tissue is destroyed, but surrounding healthy tissue may be damaged
Solution Approach 1:
The patent uses balloon catheters with selectively positioned RF electrodes that deliver energy locally to specific tissue regions. The balloon can be inflated to contact only the tumor tissue, concentrating RF energy delivery precisely at the tumor-site interface while leaving surrounding healthy tissue unaffected. This localized energy delivery resolves the contradiction between effective tumor destruction and protection of healthy tissue.
Solution Approach 2:
The balloon catheter acts as an intermediary between the RF energy source and the tissue. It provides controlled thermal coupling, allowing energy transfer to be concentrated at the tumor interface while the balloon structure itself protects surrounding healthy tissue from direct exposure to high temperatures and RF energy, thus resolving the contradiction between effective ablation and healthy tissue protection.
3Productivity
If continuous RF energy delivery is used for effective ablation, then treatment time is reduced, but temperature monitoring and control complexity increases
Solution Approach 1:
The balloon catheter system integrates multiple functions into a single device: RF energy delivery, temperature sensing, and active cooling are all incorporated into the same catheter assembly. This multi-functionality allows continuous RF energy delivery for rapid ablation while the integrated temperature monitoring and cooling systems automatically manage thermal control, resolving the contradiction between ablation speed and system complexity.
Solution Approach 2:
The system incorporates self-regulating temperature control where temperature sensors continuously monitor the ablation zone and automatically adjust RF energy delivery and cooling activation without requiring external intervention. This self-service capability enables continuous high-power ablation for rapid treatment while the automated temperature management reduces the operational complexity burden, resolving the contradiction between ablation productivity and control system complexity.
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
This approach allows for predictable and effective thermal ablation of cancerous tissue, minimizing damage to healthy tissue by ensuring precise temperature distribution and continuous delivery of RF energy, thereby enhancing treatment outcomes.
Implementation Method 1
RF waves are passed through a probe to increase the temperature within tumor tissue to destroy the tumor
Implementation Method 2
A balloon is disposed at the distal end of the cannula. The balloon is configured to receive inflation material
Implementation Method 3
A temperature feedback system is configured to monitor tissue desiccation
Data Source
AI summary
A device for performing a surgical procedure includes an elongated shaft extending between a proximal end and a distal end. The shaft includes an outer surface and an inner surface. An expandable member is disposed at the distal end of the shaft. The expandable member is configured to receive inflation material. At least one electrode is disposed with the inflatable member. Methods of use are disclosed.