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Material removal mechanisms in monopolar electrosurgery.
Arlen K Ward1, Casey M Ladtkow, George J Collins
1Department of Mechanical Engineering, Colorado State University, Fort Collins, CO 80523, USA. arlen.ward@gmail.com
Summary
This study introduces a numerical method to model monopolar electrosurgery, accurately predicting tissue effects from different electrical conditions. The model successfully simulates vaporization and thermal damage, aligning with experimental outcomes.
Area of Science:
- Biomedical Engineering
- Physics of Electrosurgery
Background:
- Mechanisms of tissue interaction in monopolar electrosurgery remain unclear.
- Lack of mechanistic understanding hinders electrosurgical technology advancement.
Purpose of the Study:
- To develop a numerical method for modeling monopolar electrosurgery.
- To predict tissue effects under varying electrical excitation conditions.
Main Methods:
- Numerical modeling of single arc events in monopolar electrosurgery.
- Simulation of explosive and confined boiling vaporization mechanisms.
- Application of Arrhenius damage calculation for tissue cutting and thermal damage prediction.
Main Results:
- The model realistically predicts the effects of different electrical waveforms.
- Simulated tissue cutting rates and thermal damage align with experimental observations.
- Achieved unprecedented agreement between model predictions and experimental results.
Conclusions:
- The presented numerical method offers a significant step towards understanding monopolar electrosurgery mechanisms.
- This approach moves beyond empirical trial and error for electrosurgical technology development.
