Research On Repeated Pulse Plasma Control For Debridement

The progress of technology and the form of artificial plasma constantly improve people’s lives.Now many scholars are beginning to use more new methods to form low-temperature plasma and apply it to industry,medical treatment and other aspects.This thesis through theoretical research,numerical analysis and experimental verification studied the generation,control and medical debridement of repetitive plasma.First,in order to generate stable repetitive plasma,the pulse generator adopting full bridge and adjustable voltage was designed,and using LTspice software carries on the simulation analysis to the stability of the pulse generator,and various plasma probe configuration that can discharge in the saline solution have been developed.The discharge experimental system of the repetitively-pulse plasma in the saline is set up,including the voltage,the current and the experimental phenomenon acquisition system.And the different intensity plasma discharge experiments are carried out.According to the data of the collected voltage and current,the plasma discharge characteristics are analyzed,including the characteristic of voltage and current,and the characteristics of power and impedance.Comparing the experiment discharge difference between the different strength of the same electrode and the different probe of the same strength,the appropriate plasma strength and probe structure that can apply to debridement can be obtained.Finally,based on the experiment of plasma discharge,two different physical models of the plasma discharge can be determined using experimental data,a simple circuit model.Further study of plasma cleaning can be realized through doing the debridement experiment of approximate burn pig skin and mice skin,it has achieved good results.Comparing with traditional debridement,plasma debridement can be faster,more comprehensive in cleaning of the wound and promoting wound healing,which laid the foundation for the plasma for human body debridement.