The intended for use for OXYN2 anesthesia machines is for the application of continuous flow anesthesia in an induction or operating room. The units are intended to provide controlled concentrations and flows of anesthesia gases in conjunction with vaporizers, ventilators, absorbers, breathing systems and patient connection fittings, which comply with the relevant ISO standard or equivalent. Depending upon the patient circuit selected, the machines can be used in open, semi-open, semi-closed or closed circuit configurations. The device is designed to be used by suitably qualified practitioners. The machines are intended for use in the application. The mechanical AHD system is designed to minimize the risk of a hypoxic mixture reaching the patient. Patient monitors are recommended for use in conjunction with the application.