Zone-Based Electrosurgical End Effector for Precise Thermal Control
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Solution Overview
Problem
Current tissue treatment methods face challenges in precisely controlling temperature distribution to effectively destroy malignant cells while minimizing damage to healthy cells, particularly due to the small temperature difference between therapeutic and injurious temperatures, and the need for varied shapes and volumes of treatment zones.
Innovation Solution
A tissue treatment system and method using an end effector with both heating and cooling elements, allowing for simultaneous or alternating energy absorption and delivery in predetermined volumes to create specific treatment zones, with configurations such as cylindrical and rectangular arrangements of thermal elements to manage thermal spread and prevent damage to surrounding tissue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heating therapy is applied to destroy malignant cells, then tumor cells are effectively treated, but healthy cells may be damaged due to temperature overlap
Solution Approach 1:
The treatment zone is segmented into multiple discrete heating elements arranged in specific patterns (linear, planar, volumetric). Each element can be independently controlled to create distinct temperature zones, allowing precise targeting of tumor cells while sparing healthy tissue through spatial separation of thermal effects.
Solution Approach 2:
Different regions of the treatment apparatus provide different thermal characteristics - some areas deliver high heat for tumor destruction while adjacent areas provide lower heat or cooling for healthy tissue protection. The system creates locally optimized temperature distributions matched to the specific anatomical and pathological requirements of each tissue region.
2Reliability
If high energy is delivered to ensure tumor cell destruction, then treatment effectiveness increases, but thermal spread to surrounding healthy tissue increases
Solution Approach 1:
The energy delivery system is divided into multiple segmented heating elements that can be activated selectively. By activating only the elements directly targeting the tumor while leaving adjacent elements inactive or operating at lower power, the system concentrates energy in the treatment zone while minimizing thermal spread to surrounding healthy tissue.
Solution Approach 2:
The heating elements operate in periodic cycles with alternating activation patterns. During active heating phases, tumor-targeting elements deliver high energy pulses. During cooling or idle phases, adjacent healthy tissue has time to dissipate heat, preventing cumulative thermal damage while maintaining treatment effectiveness over the complete cycle.
3Measurement precision
If multiple thermal elements are added to create zone-based energy delivery, then temperature control precision improves, but device complexity increases
Solution Approach 1:
The multiple thermal elements share common support structures, insulation systems, and control electronics. The apparatus design integrates these components into unified assemblies where a single structural framework supports multiple heating elements, and a centralized control system manages all elements through standardized interfaces, reducing the complexity increment despite the increased number of functional elements.
Solution Approach 2:
The heating elements are arranged in nested or hierarchical configurations where smaller elements are positioned within or between larger elements. This nesting allows compact integration of multiple thermal zones within a confined space, sharing common structural support and insulation layers, thereby achieving precise multi-zone temperature control without proportionally increasing overall device 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 enables precise temperature control and generation of various treatment zones, effectively treating tissue while minimizing damage to healthy cells by using a combination of heating and cooling to create targeted thermal effects.
Implementation Method 1
activating the one or more first thermal elements, absorbing energy from tissue and or insulating the tissue via the one or more first thermal elements
Implementation Method 2
activating the one or more second thermal elements, delivering energy to tissue via the one or more second thermal elements
Data Source
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Figure 3A
AI summary
A method of treating tissue is provided herein. The method comprises positioning an end effector in a first position in proximity to tissue, wherein the end effector has one or more first thermal elements and one or more second thermal elements and an energy delivery configuration, activating the one or more first thermal elements, absorbing energy from tissue via the one or more first thermal elements, wherein the energy absorbed is in a first predetermined volume based on the energy delivery configuration, activating the one or more second thermal elements, delivering energy to tissue via the one or more second thermal elements, wherein the energy delivered is in a second predetermined volume based on the energy delivery configuration, and generating a predetermined treatment zone based on the first predetermined volume and the second predetermined volume.