As a key tool for surgical suturing, the elasticity and toughness of the suture needle directly affect the surgical outcome and patient safety. YuanziSuture needle elasticity and toughness testerDesigned according to the YY0043-2016 standard for medical suture needles, the mechanical performance of the suture needle is accurately evaluated by simulating the stress state in real surgical scenarios. The following is the detailed usage process of the device:

1、 Equipment composition and core functions

1. Test host: Integrated power system and control system, capable of applying 0-50N tensile force and 0-180 ° bending force, with an error of ≤± 0.5%.

2. Intelligent control software: supports parameter presetting (such as loading rate, test travel), real-time data monitoring, and automatic generation of test reports.

3. Special fixtures: using three-point bending fixtures and stretching fixtures, suitable for full specification suture needles such as 1/2 arc, 3/8 arc, straight needles, etc., to ensure testing stability.

4. High precision sensor: The resolution of the force sensor reaches 0.01N, and the accuracy of the displacement sensor is ± 0.01mm, which can capture small deformations.

2、 Operation process (taking three-point bending toughness test as an example)

1. Device self-test

• Connect the power supply, check if the display screen starts normally, and confirm the sensor calibration status (error should be ≤± 1%).

• Manually operate the fixture to verify its smooth opening and closing, avoiding needle slippage during testing.

2. Sample preparation

• Select a suture needle with a diameter of 0.2-1.8mm and a length of 12-80mm to be tested, clean the surface oil stains, and prevent data interference.

• Fix the needle horizontally in the three-point bending fixture, ensuring that the needle tip is aligned with the indenter to avoid deviation and test errors.

3. Parameter Settings

• Input parameters such as needle type (e.g. 5/8 arc), testing mode (toughness test), deformation rate (5-8mm/min) through control software.

• Set the target bending angle (such as 90 °) and preset the holding pressure time (5-10 seconds).

4. Start testing

• Press the "Start" button, press the head down at the set speed, and the force displacement curve will be displayed in real time.

• Observing the deformation of the needle body: Qualified products should have no cracks, and the residual deformation after unloading should be ≤ 0.5mm.

5. Data recording and analysis

• The tester automatically saves data such as maximum fracture force and elastic modulus, and generates PDF/Excel reports.

• Comparison standard values: For example, after a straight needle is bent 90 degrees, the breaking force needs to be ≥ 15N, and after an arc-shaped needle is unfolded, it needs to return to its original curvature ± 2 degrees.

3、 Key precautions

1. Safe operation: It is strictly prohibited to touch moving parts during the testing process to avoid injury from pinching; If the needle breaks, protective gloves should be worn to clean the debris.

2. Regular maintenance: Clean the fixtures after daily use, calibrate the sensors monthly to ensure long-term stability of the equipment.

3. Exception handling: If the test data fluctuates by more than ± 5%, it is necessary to check the fixture wear or sensor sensitivity and replace the components in a timely manner.

4、 Application scenarios and value

The Yuanzi tester has been widely used in medical device manufacturing enterprises, third-party testing institutions, and hospital quality control departments. For example, a certain enterprise discovered that a batch of suture needles had insufficient toughness through this equipment, and promptly adjusted the heat treatment process to avoid the risk of batch recall; A certain hospital uses its regular sampling of suture needles to ensure the safety and reliability of surgical consumables.

The Yuanzi suture needle elasticity and toughness tester ensures medical quality with high precision and fully automated operation. Strictly following operating standards can maximize equipment performance and assist in industry standardization construction.