Overview
EN ISO 9170-2:2008 - Terminal units for medical gas pipeline systems - Part 2: Terminal units for anaesthetic gas scavenging systems (ISO 9170-2:2008) is a CEN-endorsed international standard that defines requirements and dimensions for terminal units used in anaesthetic gas scavenging systems (AGSS) in accordance with ISO 7396-2. The standard covers design, materials, testing, marking and information supplied for terminal units and their mating probes (type-specific connection counterparts). It distinguishes two terminal‑unit types based on whether the power (vacuum or disposal) device is upstream or downstream of the terminal unit.
Key topics and requirements
- Scope and compatibility
- Applies to terminal units for anaesthetic gas scavenging disposal systems only (not compressed gases or vacuum covered by ISO 9170-1).
- Specifies dimensions and type specificity to prevent incorrect connections.
- Design and materials
- Requirements for materials, construction and cleanliness to suit medical environments and patient safety.
- Design features to ensure reliable mating with probes and hose inserts.
- Testing and performance
- Prescribes test methods such as endurance, pressure‑drop, connection/disconnection forces, leakage, mechanical strength, and durability of markings and colour coding.
- Requires verification of effective connection of probes and hoses.
- Identification and documentation
- Marking, colour coding, packaging and manufacturer-supplied information for safe installation, maintenance and testing.
- Information necessary to support testing in accordance with ISO 7396-2 prior to use.
- Ancillary content
- Includes informative annexes covering rationale, environmental aspects, and special national/regional electrical installation conditions.
Practical applications and users
- Manufacturers of terminal units and mating probes use this standard to design and certify components for AGSS.
- Hospital biomedical engineers, clinical engineers and installers use it to select, install and commission AGSS terminal units safely and in compliance with ISO 7396-2.
- Regulatory, quality and procurement professionals use the standard to evaluate conformity, labelling and documentation for medical gas disposal connections.
- Designers of anaesthetic equipment and operating-room infrastructure rely on its dimensional and type‑specific requirements to avoid hazardous misconnection.
Related standards
- ISO 9170-1 - Terminal units for compressed medical gases and vacuum
- ISO 7396-2 - Medical gas pipeline systems - Pipeline systems for anaesthetic gas scavenging (defines operating pressures and system-level testing)
- EN 737-4:1998 (superseded)
- EU Directive 93/42/EEC (medical device conformity references)
Keywords: EN ISO 9170-2:2008, terminal units, anaesthetic gas scavenging systems, AGSS, medical gas pipeline systems, probe, type specificity, ISO 7396-2.
