State-Sensitive Hydrogel Tissue Models for Electrosurgical Training
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Solution Overview
Problem
Existing synthetic tissue models fail to simulate the tactile properties of human tissues and do not respond analogously to the application of energy, particularly heat and electrical energy, lacking a controlled treatment field profile equivalent to real tissue.
Innovation Solution
A state-sensitive hydrogel composition that undergoes partial or complete transitions, such as discoloration, denaturation, coagulation, vaporization, or carbonization, when exposed to energy, mimicking the response of soft tissue to thermal treatment, and is used to create a lifelike treatment field profile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional synthetic tissue models are used, then the basic physical properties can be maintained, but they fail to simulate tactile properties and do not respond analogously to thermal and electrical energy application
Solution Approach 1:
The patent employs a composite material system consisting of a hydrogel matrix (providing tissue-like mechanical properties) combined with thermochromic particles (providing thermal response capability) and conductive fillers (providing electrical conductivity). This composite structure enables the synthetic tissue to simultaneously exhibit tactile properties similar to real tissue and respond analogously to thermal and electrical energy application, thereby resolving the contradiction between maintaining basic physical properties and achieving realistic energy response.
Solution Approach 2:
The patent utilizes thermochromic materials that change optical parameters (color) in response to temperature changes, and adjusts the conductivity parameters of the hydrogel composition by incorporating specific fillers. These parameter changes enable the material to transition from a passive synthetic tissue model to an active simulation medium that responds dynamically to energy application, improving both simulation fidelity and adaptability to energy treatment.
2Reliability
If hydrogel composition with high water content is used to simulate tissue, then tactile properties are improved, but control of treatment field profile becomes difficult
Solution Approach 1:
The patent incorporates thermochromic particles within the hydrogel matrix that provide visual feedback through color changes corresponding to temperature variations. This feedback mechanism allows operators to observe the treatment field profile in real-time, enabling precise control and adjustment of thermal treatment parameters. The visual indication system transforms the invisible thermal distribution into observable patterns, thereby maintaining high water content for tactile realism while achieving precise treatment field control.
3Ease of manufacture
If existing synthetic tissue materials are used, then ease of manufacture is maintained, but they lack the ability to generate lifelike treatment field profiles
Solution Approach 1:
The patent pre-disperses thermochromic particles and conductive fillers into the hydrogel matrix during the manufacturing process, before the final curing or freezing stage. This preliminary incorporation ensures uniform distribution of functional components throughout the tissue model, enabling consistent thermal and electrical response characteristics. By preparing the composite material structure in advance during manufacturing, the patent achieves both ease of production and reliable treatment field profile generation without requiring complex post-processing steps.
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 hydrogel composition provides a realistic simulation environment for electrosurgical training, allowing for controlled treatment field profiles and enabling more life-like simulations of tissue responses to energy sources, suitable for surgical training and device development.
Implementation Method 1
undergoes partial or complete transitions, such as discoloration, denaturation, coagulation, vaporization, or carbonization, when exposed to energy
Implementation Method 2
vaporization, or carbonization, when exposed to energy
Implementation Method 3
discoloration, denaturation, coagulation, vaporization, or carbonization, when exposed to energy
Implementation Method 4
respond to the application of energy, particularly heat and electrical energy such as accompany electrosurgery
Implementation Method 5
conductive synthetic tissue materials made from a state-sensitive, cross-linked polymer composition
Data Source
AI summary
There is a need in the art for synthetic tissue models that not only simulate the tactile properties of tissues and organs but further withstand and respond in an analogous fashion to the application of energy, particularly heat and electrical energy such as accompany electrosurgery. Described herein are materials and methods useful in the construction of synthetic tissue models, particularly conductive synthetic tissue materials made from a state-sensitive, cross-linked polymer composition, that have utility in connection with thermal treatment training and simulation exercises, and moreover provide a current controlled treatment field profile analogous to that of existing tissue to that of the present invention. To that end, the simulated tissues and anatomical models of the present invention are fabricated from a hydrogel composition that undergoes partial or complete transition from its native state prior to treatment (e.g., thermal or non-thermal treatment) to one or more other states when exposed to energy, including but not limited to the following state transitions: discoloration, denaturation, coagulation, carbonization, vaporization, melting or other energy-induced state transition. These transitions facilitate the generating and detecting of a lifelike treatment field profile.