and to prevent their interchange between different gases and services and applies to terminal units: a) intended for use in medical gas pipeline systems in accordance with ISO 7396-1, b) used as pressure outlets on pressure regulators in accordance with ISO 10524-1, c) used as pressure outlets on pressure regulators integrated with cylinder valves in accordance with ISO 10524-3. 1.2 This part of ISO 9170 applies to terminal units for use with the following gases for administration to patients or for medical uses (A): oxygen (A); nitrous oxide (A); medical air (A); carbon dioxide (A); oxygen/nitrous oxide mixture (A); helium / oxygen mixtures (A); oxygen 93 (A); gases and gas mixtures classified as medical device (A); gases delivered to medical devices or intended for medical purposes (A); gases and gas mixtures for medicinal use not specified above (A). 1.3 This part of ISO 9170-1 applies to terminal units for use with the following gases intended for driving surgical tools (B): air for driving surgical tools (B); nitrogen for driving surgical tools (B). 1.4 This part of ISO 9170-1 applies to terminal units for use with vacuum systems (C). NOTE 1 Different names or symbols are used for air for driving surgical tools, such as instrument air, air motors, surgical air, air-700 and air-800. NOTE 2 The requirements of this part of ISO 9170 can be used as guidelines for terminal units for other gases. These other gases will be considered for inclusion in this part of ISO 9170 when they come into general use. 1.5 This part of ISO 9170 specifies requirements for terminal units for supply and disposal of nitrogen air for driving surgical tools. 1.6 This part of ISO 9170 specifies requirements for probes intended to be connected to the gas specific connection point. 1.7 This part of ISO 9170 does not specify the dimensions of probes or of the gas specific connection points. NOTE Regional or national standards specifying dimensions of probes and gas-specific connection points are given in the Bibliography. 1.8 Other connection systems in national use may be acceptable under this standard. Dimensioning for such connections will be specified by their respective national/international standards. 1.9 This part of ISO 9170 does not specify the requirements for terminal units for anaesthetic gas scavenging systems (AGSS), which are specified in ISO 9170-2.