RESUMO
OBJECTIVE To discuss the practicality of using the nylon nets,which are derived from disposed used medical(suture-band).The nylon nets were attached to the filtering apparatus on original return-wind exit on the lateral wall of surgical operating room.METHODS The velocity of wind,concentration of bacteria and the total(particle) amount of dust were determined by contrasting the number determined before and after passing the nylon nets on the(filtering) apparatus return-wind exit.RESULTS There was no evidence to influence the cleaning and temperature(regulating) effects of air conditioner by binding the nylon nets on them.CONCLUSIONS This method appears to save time as well as energy to work more efficiently than cleaning air conditioners weekly.