Tissue Vaporizing Rod with Controlled Thermal Conduction
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Solution Overview
Problem
Current tissue ablation methods, such as pulsed CO2 lasers, face challenges in achieving precise and minimal collateral thermal damage, particularly in applications where scarring is undesirable, like neurosurgery and skin resurfacing.
Innovation Solution
A device utilizing a vaporizing rod that rapidly delivers heat to tissue, with a temperature differential sufficient to vaporize tissue without causing excessive heat diffusion, using a mechanism to advance and retract the rod within a controlled time frame to limit collateral damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a pulsed CO2 laser is used for tissue ablation, then precise vaporization with minimal collateral thermal damage (50-100 microns) is achieved, but the device complexity and cost increase
Solution Approach 1:
The patent replaces the complex optical laser system with a simpler thermal conduction system. A heated rod or needle conducts heat directly to the tissue through thermal conduction, achieving precise ablation without requiring laser optics, beam delivery systems, or complex control electronics. This mechanical/thermal substitution maintains ablation precision while dramatically reducing device complexity.
Solution Approach 2:
The patent copies the thermal ablation effect of laser surgery using a different physical mechanism. Instead of using optical energy (laser) to heat tissue, it uses direct thermal conduction from a heated element, reproducing the same tissue vaporization and ablation outcome through a simpler physical process.
2Manufacturing precision
If the vaporizing rod remains in tissue for a longer time, then more complete tissue vaporization is achieved, but collateral thermal damage increases beyond acceptable limits
Solution Approach 1:
The patent employs periodic or pulsed insertion and removal of the vaporizing rod rather than continuous presence. The rod is inserted, held for a controlled brief period to deliver thermal energy, then removed to prevent excessive heat diffusion. This periodic action allows complete vaporization of target tissue while limiting collateral thermal damage by interrupting the heating cycle.
Solution Approach 2:
The patent uses dynamic control of the vaporizing rod's position and residence time in the tissue. Rather than static placement, the rod is actively inserted and removed according to a controlled timeline, adapting the duration of thermal exposure to achieve complete vaporization while preventing overheating of surrounding tissue.
3Manufacturing precision
If the beam spot size is reduced for more precise ablation, then the area of treatment is limited, requiring repeated passes or scanning mechanisms
Solution Approach 1:
The patent segments the ablation process into discrete, controlled insertions of the vaporizing rod at specific tissue locations. Each insertion treats a precise focal point, and multiple such points can be addressed systematically. This segmentation enables precise ablation while allowing efficient coverage of larger areas through methodical progression from one treatment point to the next.
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 device achieves precise tissue ablation with minimal collateral thermal damage, mimicking the effects of high-precision CO2 laser ablation while reducing the risk of scarring and promoting faster healing.
Implementation Method 1
a heating element, configured to heat the vaporizing element
Implementation Method 2
a vaporizing element... configured to advance the vaporizing element into a specific depth in the tissue... to vaporize the tissue
Data Source
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AI summary
A device for vaporizing a hole in tissue, including a vaporizing element, a heating element, configured to heat the vaporizing element, and a mechanism configured to advance the vaporizing element into a specific depth in the tissue and retract the vaporizing element from the tissue within a period of time long enough for the vaporizing element to vaporize the tissue and short enough to limit diffusion of heat beyond a predetermined collateral damage distance from the hole. Related apparatus and methods are also described.