METHOD FOR EXPOSING A BIOLOGICAL OBJECT TO A COLD PLASMA JET AND UNIT FOR IMPLEMENTATION THEREOF Russian patent published in 2022 - IPC A61B18/02 

FIELD: medicine.

SUBSTANCE: group of inventions relates to medicine, namely, to a method for exposing a biological object to a cold plasma jet and a unit for implementation thereof. The plasma jet is therein pumped through a generator via a dielectric channel of the working gas supplied to the channel through an inlet. A gas discharge is ignited in the channel by means of electrodes forming a discharge structure. A high-voltage voltage is applied to the electrodes, providing discharge and plasma formation and obtaining a plasma jet flowing from the outlet of the channel. The plasma jet is directed at the object. The object is exposed to active forms: radicals and/or ions generated as a result of a gas discharge. An electric field is created in the spatial gap wherein the flowing plasma jet is localised and the object of exposure is located, configured to change the distribution of the existing electric field in a direction parallel to the direction of propagation of the jet. By changing the distribution of the electric field in the spatial gap, the energy distribution of electrons is controlled. The unit comprises a working gas supply system, a high-voltage power supply, a plasma jet generator with a dielectric tubular body with an internal volume, wherein a channel for pumping the working gas, igniting a gas discharge therein and forming plasma is implemented, communicating with the working gas supply system via an inlet in the body. The plasma jet generator is equipped with a discharge structure composed of high-voltage discharge electrodes electrically connected with the high-voltage power supply, configured to form a discharge circuit. One of the electrodes is located outside of the body, configured to encircle the body, and the other electrode is located in the internal volume of the body. The installation is equipped with an auxiliary electrode brought into contact with the affected object and located at the required distance relative to the outlet for the plasma jet, which sets the spatial gap in which the expiring plasma jet and the affected object are located. In addition, the installation can be equipped with a pair of auxiliary electrodes, one of which, as indicated, is brought into contact with the affected object and is located at a distance from the outlet, setting the specified gap, and the second encircles the plasma jet, ensuring its passage through it without interaction with it, while maintaining the effectiveness of the influence of the potential applied to it in relation to the electric field of the gap.

EFFECT: control of the quantitative content of active forms (radicals, ions, radicals and/or ions) in a cold plasma jet, control of the distribution of active forms along the length of the jet, and control of the composition of active forms with a dominant effect on the object are achieved.

9 cl, 13 dwg, 15 ex