A double inductively coupled plasma for sterilization of medical devices

Abstract

A double inductively coupled low pressure plasma for sterilization of bio-medical materials is introduced. It is developed for homogeneous treatment of three-dimensional objects. The short treatment times and low temperatures allow the sterilization of heat sensitive materials like ultra-high-molecular-weight-polyethylene or polyvinyl chloride. Using a non-toxic atmosphere reduces the total process time in comparision with common methods. Langmuir probe measurements are presented to show the difference between ICP- and CCP-mode discharges, the spatial homogeneity and the influence on the sterilization efficiency. To know more about the sterilization mechanisms optical emission is measured and correlated with sterilization results.