Study of the Power Distribution of Each Impedance in the Electrical Circuit of Ionized Gas Coagulation Equipment

Abstract

Medical plasma equipment is categorized as electrical equipment for use in medical treatment. The characteristics of both low-energy ionized gas coagulation equipment (LE-IGCE) as a low-temperature plasma source and high-energy ionized gas coagulation equipment (HE-IGCE) as a high-temperature plasma source strongly depend on the structure of the plasma equipment and the operating conditions. In this paper, to ensure the electrical safety of both the LE-IGCE and the HE-IGCE, the output current and power of both types of equipment are measured, and the power distribution is evaluated for each impedance in the electrical circuit. The power required to produce plasma using the LE-IGCE corresponds to the real power of the power supply, and it is higher than that required by the HE-IGCE. However, ohmic heating in the human body caused by the LE-IGCE is much lower than that caused by the HE-IGCE.

Observations of multiple stationary striation phenomena in an atmospheric pressure neon plasma jet

“…This plasma equipment has been specially designed for blood coagulation using a low-energy APPJ. 22,23) The plasma flare is ejected from a quartz tube with an inner diameter of 1.4 mm into ambient air. The plasma equipment is composed of the dielectric barrier discharge plasma source with three sets of electrodes, and a high-voltage power supply based on piezoelectric materials has been used to produce the plasmas.…”

Study on Thermal Characteristics of Ionized Gas Coagulation Equipment

“…The currents cause ohmic heating in the tis- sues, which is described in detail by Sakakita et al . 28 The desiccation, evaporation, and carbonization of pork tissues increases electrical resistance in the treated area, resulting in the variations of currents and temperatures. Also, this causes the current to move to another point on the tissue surface where resistance is lower.…”

“…The average current density in the gas space and plasma flare are limited by the dielectric layer covering the high voltage electrode, 29 resulting in limited ohmic heating of the substrates. 28…”

Bending and turbulent enhancement phenomena of neutral gas flow containing an atmospheric pressure plasma by applying external electric fields measured by schlieren optical method

“…In the equipment, a dielectric barrier discharge is applied for plasma production. 32) The DC voltage supplied from a control box is converted to AC voltage. The peak-to-peak voltage V p-p applied to the electrode is in the range of 6-10 kV with the frequency of about 62 kHz.…”