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ISO 594 Luer conical fittings test requirement

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ISO 594-1 Conical fittings with a 6 % (Luer) taper for syringes, needles and certain other medical equipment — Part 1: General requirements

ISO 594-1 specified the requirements and test methods for syringes with a "slip" tip (a plain cone that relies on friction to hold the needle hub in place). 


ISO 594-2 Conical fittings with a 6 % (Luer) taper for syringes, needles and certain other medical equipment — Part 2: Lock fittings.

ISO 594-2 Specifies locking-type (Luer lock) Luer connectors with thread/lug locking mechanisms.


Both ISO 594-1 and ISO 594-2 have been officially withdrawn and replaced by the modern ISO 80369 series.  ISO 80369-7 retains the core 6% Luer taper design from ISO 594, ensuring backward compatibility with legacy Luer connectors.

It inherits foundational performance requirements (leakage, axial pull resistance, torque resistance) and dimensional logic from ISO 594-1/-2.

Most test methods in the ISO 80369 system (leakage, separation, stress cracking) are revised and standardized from ISO 594 original test procedures.


The test methods details can refer ISO 80369-20, like pressure leakage test, mechanical strength test etc., 


Key Upgrades in ISO 80369 vs. ISO 594

ItemISO 594-1/-2ISO 80369 Series (esp. ISO 80369-7)
Safety purposeOnly defines Luer fitting dimensions/performanceAnti-misconnection system: Luer connectors (Part 7) are dimensionally incompatible with connectors for respiratory, enteral, neuraxial, etc.
Material definitionVague rigid/semi-rigid descriptionClear modulus-based classification: rigid (>3433 MPa) & semi-rigid (700–3433 MPa)
Test frameworkDiscrete, subjective test methodsUnified, quantitative tests via ISO 80369-20:2024 (common test methods)
Regulatory alignmentNo modern medical device regulation complianceAligns with EU MDR, IMDRF essential principles, ISO 14971 risk management
Tolerance & usabilityNarrow, manufacturing-unfriendly tolerancesOptimized tolerances; clarified usability for clinical handling


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ISO 594 Luer connector Tensile strength testing machine

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ISO 594 Medical Luer Connector Multifunctional Testing Machine

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Related Standard

ISO 80369 Test of Small-Bore Luer Connector for Liquids and Gases in Medical

ISO 80369 specifies the mechanical tests for verifying the safety and reliability of connectors under clinical conditions.The tests include:resistance to separation, axial pull-out force, air or liquid leakage resistance,stress cracking test etc.,

ISO 80369-20 Test methods Small-bore connectors for liquids and gases in healthcare

ISO 80369 standard outlines 9 specific test methods, each placed in an informative annex. These are broadly categorized into Leakage Tests, Mechanical Stress Tests, and Functional Tests.  All tests use reference connectors defined in application‑specific parts (e.g., ISO 80369‑7) and uniform assembly rules.

ASTM F2477 Test for in-vitro Pulsatile Durability Testing of Vascular Stents

ASTM F2477 designed to evaluate the long-term fatigue durability and radial cyclic deformation resistance of vascular implants under simulated physiological pulsatile loading conditions. It is crucial for simulating the cyclical stresses these medical devices endure inside human blood vessels. 

ASTM F3036 Testing of Absorbable Stents

ASTM F2942 specifies in vitro test methodologies to evaluate the cyclic durability of vascular stents under non-radial mechanical deformations (axial, bending, and torsion) that occur in vivo due to musculoskeletal motion, breathing, or cardiac activity. include Axial, bending, torsional, Pulsatile Durability, Radial Loading etc., test. 

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