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Related Experiment Videos

Direct-current potentials created by arcing during monopolar radiofrequency electrosurgery.

R D Tucker1, E V Kramolowsky, P Stasz

  • 1Department of Pathology, University of Iowa Hospitals and Clinics, Iowa City.

Biomedical Instrumentation & Technology
|May 1, 1990
PubMed
Summary

Radiofrequency electrosurgery generates significant direct current (DC) potentials, increasing with sparking. Understanding these currents is crucial for new procedures like cardiac ablation to prevent muscle and nerve stimulation.

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Area of Science:

  • Biomedical Engineering
  • Electrophysiology
  • Surgical Technology

Background:

  • Muscle and nerve stimulation during radiofrequency electrosurgery is a known issue.
  • Electrosurgery is expanding into new applications, including cardiac ablation.
  • The mechanism of stimulation requires further investigation for safety.

Purpose of the Study:

  • To investigate the generation of direct current (DC) potentials during radiofrequency electrosurgery.
  • To correlate DC potential generation with sparking at the active electrode.
  • To analyze DC potentials across different electrosurgical generators, modes, and tissue types.

Main Methods:

  • Measurement of DC currents generated during radiofrequency electrosurgery.
  • Correlation analysis between DC potentials and sparking intensity.

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  • Evaluation of DC potentials under varying generator types, operation modes (cut, coagulation, fulguration), and tissue impedances.

    • Main Results:

    • Significant DC currents are generated during electrosurgery.
    • DC potentials increase proportionally with sparking at the active electrode.
    • DC potentials vary based on the electrosurgical generator, operation mode, and tissue impedance.

    Conclusions:

    • Radiofrequency electrosurgery generates substantial DC currents.
    • Sparking at the active electrode is a key factor in DC potential generation.
    • These findings are critical for understanding and mitigating neuromuscular stimulation in electrosurgery, especially in sensitive procedures.