ISO 9170-1:2008 applies to:terminal units intended for use in medical gas pipeline systems in accordance with ISO 7396-1, for use with the following medical gases:oxygen,nitrous oxide;medical air;carbon dioxide;oxygen/nitrous oxide mixture [50 %/50 % (by volume)];terminal units intended for use in medical gas pipeline systems in accordance with ISO 7396-1, for use with the following gases and services:oxygen-enriched air;air for driving surgical tools;nitrogen for driving surgical tools;vacuum.It is intended especially to ensure the gas-specific assembly of terminal units and to prevent their interchange between different gases and services.ISO 9170-1:2008 specifies requirements for terminal units for supply and disposal of nitrogen or air for driving surgical tools and requirements for probes intended to be connected to the gas-specific connection point which is part of the terminal unit.