The principle and test method of the syringe self-destruction characteristic tester

Self-destruct fixed-dose vaccine syringe tester syringe according to its use can be divided into glass syringe, insulin syringe, pre-filled syringe, medical disposable syringe, vaccine syringe, etc.
, especially in the past two years, injection vaccine has become an effective measure for epidemic prevention and control, and the demand for vaccine syringes has also increased
sharply.

In order to achieve the requirement of one person and one injection and one tube for vaccinating vaccines and prevent reuse, a design
of self-destruct characteristics has been added to the vaccine syringe.

Syringe self-destruct characteristics and other physical characteristics of the syringe, but also need to use professional testing instruments, that is, syringe self-destruct characteristics tester, today Weixia technology for you to do a knowledge science
.

The standard basis for the syringe self-destruction characteristic tester is YY/T0573.
3-2019 Disposable Sterile Syringe Part 3: Self-Destruct Fixed-Dose Vaccine Syringe
.

Therefore, the syringe self-destruct characteristic tester detects a self-destruct fixed-dose vaccine syringe
.

In this standard, it is required that when the syringe and needle are delivered at a preset fixed dose should automatically fail, the user should not be required to invalidate
it again or with additional movements.

The effective time of the self-destruction characteristic can vary depending on the design, mainly within the following description range: 1.
From the beginning of the injection, the self-destruction characteristic automatically takes effect and remains valid; 2.
When 50% of the preset fixed dose is delivered, the self-destruction feature automatically takes effect and remains effective; 3.
When the preset fixed dose is delivered, the self-destruction feature automatically takes effect
.

In all cases, the self-destruct characteristics once in force: (1) under normal conditions of use, syringes and needles should not be reused; (2) Under the method one test, the self-destruction characteristic should not be invalid, that is, the force of 100N is applied to the core rod at a speed of 100mm/min, and the syringe should not be used again; (3) Under the method two test, the self-destruction characteristic should not fail, that is, the pressure is slowly applied from the inner cavity of the needle tube to 300 kPa at a rate of about 100 kPa/min, and the syringe should not be used
again.

Method 1: Deliver the full dose or test water
under normal conditions of use.

Use a test setup to apply an increasing force to the hand or mandrel to eject
the mandrel from the coat.

When the mandrel is moved at a speed of 100 mm/min, increase the tensile force to a maximum of 100 N or until the mandrel is capable of being conveyed
again in the same syringe.

Method 2: Using a test apparatus, apply a slowly increasing pressure of about 100 kPa/min to a maximum of 300 kPa using a test apparatus and record whether the piston seal can revert
in the syringe jacket.

The above is the principle of the syringe self-destruct characteristic tester is also the test method of the self-destruction characteristics of the syringe, this article is originally compiled by Weser Technology, I hope to help
you.