Articulating Ablation Probes for Spinal Tumor Temperature Control
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Solution Overview
Problem
Existing tumor ablation technologies face challenges in precisely targeting tumor tissue while minimizing damage to surrounding healthy tissue, particularly in bone structures like vertebrae, due to inadequate temperature monitoring and control during radiofrequency ablation procedures.
Innovation Solution
The system employs a tumor ablation device with articulating distal portions and integrated thermocouples to monitor tissue temperature and adjust thermal energy delivery based on impedance and temperature feedback, ensuring precise ablation of tumor tissue while avoiding damage to healthy tissue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radiofrequency energy is delivered to ablate tumor tissue, then tumor cells are effectively killed, but surrounding healthy tissue may be damaged due to inadequate temperature monitoring and control
Solution Approach 1:
The system employs multiple thermocouples positioned at different locations along the probe to monitor tissue temperature in real-time during ablation. The generator receives temperature feedback from these thermocouples and automatically modulates the radiofrequency energy delivery to maintain temperatures within a therapeutic range, thereby killing tumor cells while preventing excessive heating that would damage healthy tissue.
Solution Approach 2:
The ablation zone is dynamically controlled by adjusting the delivery of thermal energy based on real-time temperature measurements. The system transitions from static energy delivery to dynamic modulation, where the amount of energy delivered changes continuously according to the measured temperature conditions at different locations within the tissue.
2Reliability
If thermal energy is delivered to create large ablation zones, then more tumor tissue is destroyed, but temperature control becomes more difficult and healthy tissue damage increases
Solution Approach 1:
The ablation probe incorporates multiple thermocouples positioned at different locations (e.g., distal, proximal, and intermediate positions) to independently monitor temperature in different zones of the ablation field. This segmentation of temperature monitoring allows the generator to control temperature at multiple discrete points simultaneously, enabling precise control over large ablation zones while preventing hot spots that could damage healthy tissue.
Solution Approach 2:
The system applies different energy delivery strategies to different locations within the ablation zone based on local temperature conditions. Each thermocouple provides localized temperature information, and the generator modulates energy delivery specifically to that region, allowing the ablation zone to have non-uniform temperature distribution optimized for tumor destruction while protecting adjacent healthy tissues.
3Manufacturing precision
If temperature monitoring is enhanced with multiple thermocouples, then temperature control precision improves, but device complexity increases
Solution Approach 1:
Multiple thermocouples are integrated into a single probe assembly, combining multiple sensing functions into one device. The thermocouples are positioned at different locations along the probe shaft and electrically connected to the generator, which processes all temperature signals through a unified control algorithm to modulate energy delivery, thereby achieving multi-point temperature monitoring without proportionally increasing overall 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 enables precise and controlled ablation of tumors in bone structures by creating symmetric ablation zones, effectively killing tumor cells while minimizing harm to surrounding healthy tissue through real-time temperature monitoring and energy modulation.
Implementation Method 1
a thermocouple in thermal communication with the ablative element and configured to measure a temperature of the tissue
Implementation Method 2
an ablative element mounted on a distal end of the elongated member
Implementation Method 3
at least one thermocouple in thermal communication with the ablative element
Data Source
Figure 1
Figure 2A~2B
Figure 2C~2D
AI summary
Spinal tumor ablation devices and related systems and methods are disclosed. Some spinal tumor ablation devices include two conductors and one or more thermocouples. The thermocouple to measure a temperature at a location on one of the conductors. A generator can produce an electrical alternating current to be conducted between the first conductor and the second conductor via tissue within a desired ablation region. A processor may monitor temperature and impedance and control an output of the generator when the impedance of the tissue increases and stop the generator when the thermal energy delivered to the tissue reaches a target threshold.