ISO 10524-4:2008 applies to the types of low-pressure regulators listed below and intended to be used with the following medical gases in the treatment, management, diagnostic evaluation and care of patients:oxygen;nitrous oxide;medical air;helium;carbon dioxide;xenon;specified mixtures of the gases listed above;air for driving surgical tools;nitrogen for driving surgical tools;oxygen-enriched air.The types of low-pressure regulators covered by ISO 10524-4:2008 are as follows:low-pressure regulators intended to be connected to terminal units of medical gas pipeline systems complying with ISO 7396-1;low-pressure regulators with integral flow-metering devices intended to be connected to terminal units of medical gas pipeline systems complying with ISO 7396-1;low-pressure regulators intended to be connected to terminal units attached to pressure regulators complying with ISO 10524-1 or ISO 10524-3;operator-adjustable low-pressure regulators for air or nitrogen for driving surgical tools that are an integral part of a medical gas pipeline system complying with ISO 7396-1.