Testing equipment for mechanical property of intravascular stents

Abstract

The invention discloses a test device for the mechanical properties of a vascular stent. The test device includes an image acquisition and processing module, a control terminal, a data acquisition module, an automatic loading module and an anti-extrusion performance testing device connected in series; the vascular stent mechanical The performance testing equipment may also include a distensibility testing device, a compliance testing device, a removal force testing device and a transportability testing device. The test equipment with this structure can perform multifunctional mechanical performance tests on the vascular stent.

Description

technical field [0001] The invention relates to a test device for the mechanical properties of a medical device, in particular to a test device for the mechanical properties of a vascular stent. Background technique [0002] With the rapid development of my country's economy, the improvement of people's living standards and the change of lifestyle, the incidence of coronary heart disease is also increasing year by year, and it has become one of the main diseases that endanger human life and health. At present, there are many methods for treating coronary heart disease, but interventional therapy has attracted more and more attention because of its advantages of less bleeding, less trauma, fewer complications, safety and reliability, and quick recovery after surgery. As an important part of vascular stenting, the performance of vascular stent is undoubtedly one of the key factors affecting the clinical effect of vascular stenting. A stent with good performance can make the d...

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Problems solved by technology

[0003] However, by summarizing the current research on performance testing of vascular stents, it can be found that domestic scholars have little research on stent performance testing, and research on related testing devices is even rarer. Although foreign scholars have done some research, there are still some Problems, such as the single test device, most of the existing test devices are in the experimental research stage, and the test index is single, usually only one performance of the bracket can be tested, and the scope of application is narrow

Another example is the test of anti-extrusion performance. Current researchers generally use lasers to measure the diameter of the stent, so that it is impossible to observe the shape change of the stent during the extrusion process, and it is also impossible to make an in-depth analysis of the failure mode of the stent.

In addition, although some researchers have considered this point and used machine vision for measurement, they have ignored that the cross-section of the bracket usually appears elliptical during the extrusion deformation process, and this often has a greater impact on the experimental results.

In addition, removal force, as an important performance index of stents, is also one of the items that must be tested by the State Food and Drug Administration, the US Food and Drug Administration (FDA), but there are few studies on its testing Few

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