ISO 80369-7:2021

Overview

ISO 80369-7:2021 specifies the design, dimensions and functional performance requirements for small-bore connectors used in intravascular and hypodermic applications. Commonly known as Luer connectors (Luer slip and Luer lock), these small-bore connectors are widely used on hypodermic syringes, needles and IV cannulae. The standard was published by ISO in collaboration with IEC (ISO/TC 210 and IEC/SC62D) to reduce misconnections and improve patient safety.

Key topics and requirements

• Dimensional requirements for Luer connectors (6% Luer taper) to ensure secure and consistent mating.
• Performance tests including:
  • Fluid leakage (positive pressure liquid leakage and pressure decay)
  • Sub-atmospheric (air) leakage
  • Stress cracking resistance
  • Resistance to separation under axial load and unscrewing
  • Resistance to overriding
• Material categories defined by modulus of elasticity: rigid (>3 433 MPa) and semi-rigid (700–3 433 MPa), with some requirements differentiated by material type.
• Type testing and reference connectors are provided (normative Annexes B and C).
• Usability and safety guidance in informative annexes (D–G), including rationale and assessment methods.
• Notes: Luer connectors were originally designed for pressures up to 300 kPa. The document does not prescribe requirements for the host medical devices; those remain in device-specific standards.

Practical applications and who uses it

ISO 80369-7 is intended for:

• Medical device designers and engineers developing syringes, IV sets, needles and related accessories.
• Manufacturers performing component design, production tolerancing and type testing.
• Regulatory affairs and quality managers ensuring conformity with international connector requirements.
• Clinical engineers and procurement teams selecting compatible connectors to reduce misconnection risks.
• Risk managers and usability specialists applying ISO 14971 and IEC 62366 guidance referenced in the standard.

Benefits include reducing wrong-route administration, ensuring connector compatibility within intravascular/hypodermic applications, and preventing accidental interconnection with connectors intended for other clinical uses.

Related standards

• ISO 80369-1:2018 - General requirements for small-bore connectors
• ISO 80369-20:2015 - Common test methods
• ISO 80369-6:2016 - Connectors for neuraxial applications
• ISO 14971:2019 - Risk management for medical devices
• IEC 62366-1:2015 - Usability engineering for medical devices
• Other device-specific standards (e.g., ISO 8637, ISO 8536-4) exclude some connector types addressed elsewhere

Keywords: ISO 80369-7:2021, Luer connectors, small-bore connectors, intravascular, hypodermic, medical device connectors, leakage testing, connector dimensional requirements.