Specification 1 for Joint Testing Fixture: Stable Performance

Specification 1 for Joint Testing Fixture: Stable PerformanceSpecification 1 for Joint Testing Fixture: Stable Performance

Joint testing tool-YY 0267-2025

The connector testing fixture is used in the YY 0267-2025 standard to evaluate the connection reliability and sealing performance of various types of connectors (such as Luer connectors and Luer connectors) in blood purification extracorporeal circulation blood/fluid systems, ensuring that they do not fall off or leak during clinical use and ensuring patient safety.

According to the standard requirements, the core functions and design points of this fixture are as follows:

Test object: mainly targeting commonly used connection components such as Luer lock connectors and Luer connectors in extracorporeal circulation blood routes, covering key interfaces such as arterial end, venous end, and dialysate tubing.

Connection and disconnection force testing:

The fixture needs to be able to apply and measure the connection force (insertion force) and disconnection force (pull-out force) of the joint, ensuring that they are within the specified range (usually 0.1-10N), neither too tight to make operation difficult, nor too loose to cause the risk of detachment.

During testing, the clinical operation speed should be simulated, and the insertion/extraction speed should be controlled at (90 ± 10) mm/min.

Torque and tensile testing:

The joint needs to withstand a certain torsional moment (≥ 0.1 N · m) and axial tension (≥ 40 N) in the connected state, and the fixture should have multi-directional loading capacity to verify its stability under complex stress.

Sealing verification:

Under the condition of applying physiological pressure (such as 300 mmHg), connect the test medium (such as physiological saline or air) through a fixture, observe whether there is leakage or bubbles, and maintain the pressure for no less than 3 minutes.

Adaptive design:

The tooling needs to be equipped with multiple specifications of standard docking joints to match the blood pipeline produced by different manufacturers, solve the contradiction between interface universality and specificity, and support cross brand compatibility testing.

Environmental simulation:

Before testing, the sample needs to be pre treated in a water bath at (37 ± 2) ℃ for 1 hour to simulate the human body temperature environment and ensure that the material is in its actual working state.

This fixture is widely used in the production quality inspection and registration inspection of medical devices such as dialyzers and hemofilters, and is a key testing device to ensure the safe operation of extracorporeal circulation systems.