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KMID : 1040020220130020071
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International Journal of Pain
2022 Volume.13 No. 2 p.71 ~ p.77
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Increase Efficiency of Intervertebral Disc Tissue Removal through Optimization of Radiofrequency Plasma Generator
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Kim Nack-Hwan
Lee Sang-Heon
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Abstract
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Background: Increasing the applied voltage under the same output (W) of the radiofrequency generator to increase the electron agglomeration of the electrode will increase plasma ions resulting in increased substantial tissue removal. Improving performance without changing the size and function of electrodes inserted into the human body is clinically significant. The purpose of this study is to check whether the peak voltage output of the power supply improves the removal efficiency of artificial tissue under the same system conditions.
Methods: In an in-vitro experiment using the porcine nucleus pulposus, the apparatus was configured to reproduce the target tissue removal and to analyze the current, voltage, and resistance. We increased the amount of plasma generated through pulse width modulation (PWM), and controlled the output average power (output power × duty ratio) to 45W to compare 100% duty ratio and 15% plasma generation. The primary outcome was tissue removal rate of radiofrequency generator using PWM method. Each experiment was attempted six times using tissue extracted from one animal.
Results: Even if the same average power is applied, increasing the breakdown voltage through PWM with a duty ratio is effective for achieving rapid plasma generation. The tissue removal rate of radiofrequency generator using the PWM method was assessed under the same conditions. Tissue removal efficiency via PWM was increased by approximately 44% compared with the removal rate without PVM.
Conclusions: The 44% improvement in the removal rate under controlled experimental conditions is meaningful in terms of the operational efficiency of the device.
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KEYWORD
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herniated disc, nucleoplasty, pulse width modulation, radiofrequency ablation
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