Radiofrequency Tissue Treatment Device with Temperature Feedback Control
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Solution Overview
Problem
Existing systems for treating gastrointestinal sphincter dysfunction using radiofrequency energy face challenges in avoiding tissue ablation while ensuring effective tissue treatment, as they struggle to balance between overheating and underheating, leading to inconsistent therapeutic outcomes.
Innovation Solution
An electrosurgical system that applies radiofrequency energy to create tissue lesions at specific tissue levels without ablating or burning the tissue, utilizing a device with a flexible outer tube, expandable basket, and movable electrodes, along with a spacer and actuator to maintain precise alignment and temperature control, ensuring thermally heated tissue within a therapeutic range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radiofrequency energy is applied to create tissue lesions, then tissue structure is altered and therapeutic effect is achieved, but tissue may be ablated or burned
Solution Approach 1:
The system continuously monitors tissue temperature during radiofrequency energy application and provides real-time feedback to the control system. When the tissue temperature approaches the ablation threshold, the system automatically adjusts or terminates energy delivery, preventing tissue burning while maintaining therapeutic heating effects.
Solution Approach 2:
The system dynamically adjusts radiofrequency energy parameters (power, duration, frequency) based on real-time tissue temperature measurements and treatment progress. This parameter optimization ensures consistent therapeutic heating without exceeding ablation thresholds, resolving the contradiction between effective treatment and tissue damage prevention.
2Reliability
If radiofrequency energy is applied to alter sphincter muscle structure, then therapeutic outcomes are achieved, but tissue temperature control becomes critical
Solution Approach 1:
Multiple temperature sensors positioned at different tissue levels provide continuous feedback on the thermal state of the tissue. The control system uses this feedback to adjust energy delivery in real-time, maintaining temperature within the therapeutic window and preventing both underheating and overheating.
Solution Approach 2:
The system applies radiofrequency energy in controlled periodic cycles with intermittent pauses for temperature assessment and cooling. This periodic application pattern allows thermal diffusion and prevents runaway heating, maintaining consistent therapeutic temperatures while avoiding ablation.
3Reliability
If multiple tissue levels are treated with radiofrequency energy, then comprehensive sphincter treatment is achieved, but risk of overheating increases
Solution Approach 1:
The treatment is divided into discrete energy application cycles, each targeting specific tissue levels. The system treats different tissue depths in segmented stages with cooling intervals between them, allowing heat dissipation and preventing cumulative overheating while ensuring comprehensive coverage of all required tissue levels.
Solution Approach 2:
The system preemptively reduces energy delivery to subsequent tissue levels if previous levels show signs of excessive heating. Cooling fluid is delivered in advance to anticipated treatment zones, and energy parameters are pre-adjusted based on real-time temperature trends, preventing overheating before it occurs.
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 achieves reliable and consistent tissue treatment by preventing both overtreatment and undertreatment, effectively altering sphincter muscle structure without causing tissue necrosis, thereby addressing sphincter-related issues such as GERD and fecal incontinence.
Implementation Method 1
applying radiofrequency energy to tissue to create tissue lesions without ablating tissue
Implementation Method 2
applying radiofrequency energy to tissue at a power setting and time duration which causes thermal effect to tissue
Data Source
AI summary
A system for controlling operation of a radiofrequency treatment device to apply radiofrequency energy to tissue to treat tissue to create lesions without ablating the tissue. The system includes a device having flexible outer tube, an expandable basket having a plurality of arms movable from a collapsed position to an expanded position, a plurality of electrodes movable from a retracted position to an extended position to extend through the openings in the arms, and an advancer slidably disposed within the outer tube to move the electrodes. An elongated spacer is positioned within the outer tube, the spacer having a central lumen to receive the advancer and to maintain a central position of the advancer.