Estudio y caracterización de los materiales de un marcapasos sometido a radiación ionizante

Abstract

In this work we studied the effect of ionizing radiation into two components belonging to the implantable pacemaker electrical insulation and CMOS circuits. Specifically, we examined the effect of X-rays of 6 MeV corresponding to an RT treatment in the insulation covering the pacemaker leads (medical grade polyurethane). We also analyzed the changes induced by gamma irradiation in this material, absorbed dose from 1 to 25 kGy corresponding to a sterilization process. No changes were observed in the infrared spectrum of the polyurethane samples. However, samples irradiated with doses corresponding to a sterilization process changed its color range according to the dose absorbed by the samples. To study the effect of radiation on CMOS circuits were irradiated commercial microcontrollers with a source of neutrons and mixed fields. We compared the data stored before and after irradiation obtaining a particular response in the circuits.