Cooled Radiofrequency Probe Tissue Zone Control
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Solution Overview
Problem
Current radiofrequency ablation techniques lack a reliable method for controlling energy delivery, leading to either excessive tissue alteration or inadequate treatment, resulting in unnecessary tissue damage and inefficiency in pain management for conditions like knee osteoarthritis.
Innovation Solution
A system and method for controlling energy delivery during radiofrequency ablation procedures, using a cooled radiofrequency probe with a sensing device and controller to create specific zones of tissue alteration, including a primary zone with substantial coagulation, a secondary zone with partial coagulation, and a tertiary zone with minimal coagulation, optimizing the area of effective denervation and minimizing energy usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radiofrequency energy is delivered to ablate tissue, then pain relief is achieved through nerve blocking, but the area of tissue alteration may be larger than needed, wasting energy and causing unnecessary tissue damage
Solution Approach 1:
The patent segments the tissue alteration process into multiple controlled energy delivery phases (pre-ablation, ablation, and post-ablation phases) with different power levels and durations. This allows precise control over the treated area, ensuring adequate pain relief while minimizing energy waste and unnecessary tissue damage by delivering energy in controlled increments rather than a single uncontrolled burst.
Solution Approach 2:
The system dynamically adjusts energy delivery parameters (power, pulse duration, interval timing) based on real-time tissue response and treatment progression. The controller modulates energy delivery across multiple phases, increasing power during ablation phase while maintaining control, and reducing power during post-ablation phase, thereby optimizing the balance between effective treatment and energy efficiency.
2Reliability
If radiofrequency energy is delivered to ablate tissue, then pain relief is achieved through nerve blocking, but the area of tissue alteration can be too small, resulting in an ineffective treatment procedure
Solution Approach 1:
The patent implements continuous energy delivery across three sequential phases (pre-ablation, ablation, post-ablation) without interruption, ensuring the treated area reaches the necessary threshold for effective nerve blocking. This continuous action guarantees adequate tissue alteration for reliable pain relief while maintaining treatment efficiency by avoiding repeated procedures.
Solution Approach 2:
The system changes energy delivery parameters (power level, pulse duration, frequency) across different treatment phases to optimize both treatment effectiveness and efficiency. Power increases during the ablation phase to ensure adequate tissue alteration, then decreases in the post-ablation phase, dynamically adjusting parameters to achieve the minimum effective treatment area while maintaining productivity.
3Measurement precision
If high energy is delivered to create a visible lesion, then tissue alteration is confirmed, but unnecessary tissue damage occurs and patient discomfort increases
Solution Approach 1:
The patent applies partial action by delivering energy in controlled phases where the pre-ablation and post-ablation phases use lower power levels that produce minimal visible lesions but still achieve therapeutic effect. The visible lesion is created only during the intermediate ablation phase at controlled levels, providing sufficient assessment capability while minimizing excessive tissue damage and patient discomfort compared to continuous high-energy delivery.
4Manufacturing precision
If multiple zones of tissue alteration are created with different levels of coagulation, then precise control over treatment area is achieved, but the system complexity increases
Solution Approach 1:
The patent segments the treatment process into three distinct phases (pre-ablation, ablation, post-ablation) with different energy parameters, creating multiple zones of tissue alteration with varying coagulation levels. This segmentation achieves precise control over the treated area and coagulation extent while managing system complexity by using a standardized phased approach that can be automated through controller programming rather than requiring complex hardware modifications.
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 enables precise control of tissue alteration, providing effective pain relief by creating larger lesions with delayed immune repair, reducing discomfort, and minimizing energy consumption, resulting in prolonged pain management for patients.
Implementation Method 1
radiofrequency energy... can also be used to ablate, denervate, or otherwise alter tissue
Implementation Method 2
a primary zone with substantial coagulation, a secondary zone with partial coagulation, and a tertiary zone with minimal coagulation
Implementation Method 3
cooled radiofrequency probe... operation of a cooling mechanism
Data Source
AI summary
Systems and methods for controlling energy delivered to an area of tissue during a treatment procedure are provided. The system includes a device for delivering energy to the area of tissue; an energy generator for generating and supplying energy to the device; and a controller for controlling an amount of energy generated by the energy generator and delivered to the area of tissue by the device. Controlling the amount of energy delivered to the area of tissue alters a primary zone of the area of tissue to a first level, alters a secondary zone to a second level, alters a tertiary zone to a third level, or a combination thereof, where the first level, the second level, the third level, or a combination thereof is predetermined, and where a coverage area of the primary zone, the secondary zone, the tertiary zone, or a combination thereof is also predetermined.