Solutions for Luer Lock Testing
Impervious connections are vital to the medical industry; this is especially true for intravenous applications. Originally developed by Fairleigh Dickinson, co-founder of Becton Dickinson, Luer taper fittings are used by health care providers around the world to act as the required leak-proof link between syringes and hypodermic needles. As with many devices in this field, the equipment must adhere to strict test protocols.
ISO has provided the published standard 594-1 defining general requirements for these 6% taper conical fittings since 1967. The general requirements for all Luer fittings include gauging, leakage, separation force, stress cracking and the mechanical test methods to ensure the end product. There are however two types of Luer taper fittings; the slip taper, which is only suitable for low pressure applications and the more robust Luer Lock connection. The lock connection includes a screw locking thread where the slip connections do not. Luer Lock connections are recommended for any application that must seal, especially with higher pressures. Luer Lock fitting requirements can be found in ISO 594-2 includes the general requirements from 594-1, increases force limits, and adds unscrewing torque and resistance to overriding. Mechanical testing of these Luer Locks requires bi-axial test systems capable of producing both axial and torsional loads on the specimen.
A noteworthy additional standard, ISO 80369, focusing on small bore tubing connections has been and currently is in a global collaborative development. This standard aims to reduce cross connections between applications through connector differentiation.
ADMET offers multiple mechanical biaxial testing systems configured to meet and exceed the ISO test standards. All of the systems are controlled with ADMET’s proven MTESTQuattro testing software that automatically performs each test according to ASTM and ISO standards, as well as custom test procedures.
Read more about luer lock testing standards here: