Method for altering concentration in an anesthesia equipment involves advancing the piston of the volume displacement unit in such a way that a predetermined, adjustable pressure is not exceeded

摘要

Method for altering the concentration of anesthetic or new gas supplied in an anesthesia equipment comprises: a) fully retracting the piston of the volume displacement unit (1), and increasing the new gas supply from the unit (14) so the unit is fully charged with new gas; b) fully advancing the piston so that a predetermined, adjustable pressure at the valve (7) is not exceeded.