Leak and blockage tests for catheters are crucial to ensure their functionality and safety. Pressure decay leak testing is the most widely preferred leak testing method but depending on the type and construction of catheters, there can be variations in the test method followed.
- The catheter is first connected to the testing device and completely insulated from outside pressure using suitable fittings.
- Then, the catheter is pressurised to a desired test pressure depending on the type of catheter. Typically, the test pressure varies from 100-450 psig for non-compliant balloon catheters and 5-200 psig for multi-lumen catheters.
- The system is left untouched for a few seconds to stabilise the air inside the test system. This is called the stabilisation period.
- The pressure decay test is conducted and monitored for any pressure drop during this period. Depending on the reject level, the leak tester shows if the testing unit has passed the leak test or not.
Multi-lumen catheters sometimes require blockage tests. In this case, each of the catheter tubes is sealed and tested sequentially, using the pressure decay test method. The stabilisation time is set lower to reduce pressure loss through unblocked parts and finally, the pressure drop is measured over a period to check blockage.
Watch how ATEQ’s automated leak test systems are used in high-speed testing of medical devices in assembly lines. This video demonstrates the integration of pressure decay testing to ensure catheter quality and performance.
