Medical equipments, namely, dispensers, sold empty, for sterile volumetric dosage of solutions, through a closed system using empty bags with a filter that are sold separately; sterile polyvinylchloride bags with a filter in the filling port to use in automatic closed systems for sterile volumetric dosage of intravenous solutions; sterile propylene bags with a filter in the filling port to use in an automatic closed systems for sterile volumetric dosage of intravenous solutions