Testing of Syringes

Syringes are used in a wide variety of applications and come in many shapes and sizes. ZwickRoell offers the right test fixture for your requirements.
Glide force test on multiple syringes

Breakaway Force/Glide Force (DIN EN ISO 7886 -1, DIN EN ISO 11499 and ISO 11040-4)

This test fixture is used to determine the break-away force and glide force of syringes, syringe cartridges, and similar dosimeters. Glide force is tested to DIN EN ISO 7886 -1, DIN EN ISO 11499, and ISO 11040-4. The breakaway force and glide force are important parameters used to select the most suitable syringe. These forces may not exceed or fall below certain limits to ensure that a safe drug dose is administered. The forces are influenced by the viscosity of the drug and the size of the cannula.

ZwickRoell's universal test fixture can accommodate all common syringe geometries thanks to its adjustable specimen holder. Specimen diameter adjustment is performed steplessly and tool-free via a handwheel. Optional holders facilitate the testing of specimens without finger grips. ZwickRoell's testXpert III testing software enables you to easily test the maximum force and the average glide force. The integration of a weigh module makes it possible to determine the dosing accuracy of single doses, such as those in insulin cartridges. A camera documents the glide force of the syringe plug. The videoCapture plus option for testXpert II synchronously records the test results and the video signal. Together with the non-contact videoXtens extensometer, continuous measurement of the thickness of the plug is possible.

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Test fixture to determine the breakaway force and glide force of syringes
Fixture to determine the glide force/breakaway force of syringes with integrated scale

Benefits/features of the test device for determination of breakaway force: 

  • Test device consists of a holder below and a die above
  • Includes a glass container to collect escaped liquid
  • Swiveling guide jaws with two different radii ensure optimal guiding
  • Die with concave seat ensures centering of (syringe) plunger
  • Customized mounts can be easily attached
  • Fixture has apertures for visual monitoring of glide path
  • Insertion and removal of specimens via a quick release fastener maintains the specimen diameter setting
  • Cartridge holders available as an option for standard sizes 1.5ml and 3.0ml
  • testXpert II makes it possible to connect to an optional scale. This means the fixture can also be used for dosing accuracy tests to, for example, DIN EN ISO 11608-3
  • A safety door is recommended if testing glass syringes
  • This fixture can be used to perform tests on dental cartridges for local anesthesia to DIN EN ISO 11499.

Plunger Actuation Force DIN EN ISO 7886-1

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The test fixture is used to determine the plunger actuation force of sterile single-use syringes made from plastic and other materials for medical purposes, with fluid contents(water) to EN ISO 7886-1 Annex E (2017).

The test fixture consists of an upper and a lower clamping device to hold the syringe and a height-adjustable fluid reservoir. During the test the fluid of the filled syringe is intended to be pushed out into the reservoir via a standard needle (18G). The needle is connected to the hose via a Luer connector. During the test the plunger travel, the breakaway force, as well as the maximum and the average glide force are recorded and evaluated via ZwickRoell testing software.

Simultaneous Glide Force Tests on Multiple Syringe Systems

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This fixture comprises an AllroundLine table top testing machine expanded to 6–8 test axes to hold the corresponding number of load cells. It is suitable for use both in a laboratory and for in-process monitoring, and is used to test various frictional forces between the syringe plunger and barrel or the sealing rings in the syringe barrels. The syringe holding fixture can accommodate syringes of various sizes, as well as two medium containers for catching the expelled liquid. This fixture can be used to test frictional forces on cartridges. The force sequences can be synchronized thanks to the individual height adjustment feature.

If it is necessary to test a large number of syringes in a short time a materials testing machine with a carousel can be used. A large number of specimens can be fed to the machine via a magazine and tested one after the other. Operator influence on the test is reduced, resulting in greater stability in MSA/ Gauge R&R studies.

Luer System/Luer Lock Connectors ISO 594-1 and ISO 594-2

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The Luer cone is a standardized connector system used in tube systems in the medical industry. It is used with items such as cannulae, syringes, catheters, three-way stopcocks, and infusion tubes. The seal is achieved through used of a cone-shaped fitting, called a Luer cone. Furthermore, the Luer lock connector has a threaded sleeve to achieve a tight connection so fluids cannot escape. For quality control of these components, a materials testing machine with superimposed torsion drive is used.

ISO 594-1 and ISO 594-2 are the standards used to test a Luer system or Luer lock connector for stability. It is possible to easily determine torques under static axial load with the superimposed axial/torsion drive of a zwickiLine torsion materials testing machine.

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