Application case of measuring the surface roughness of cardiac stents using the AM-7000 series of white light interferometers
As a commonly used medical device for cardiac interventional surgery, cardiac stent plays an important role in the treatment of heart diseases. First of all, cardiac stents can unblock blood vessels and reduce myocardial ischemia and heart burden. Its emergence fills the shortcomings of traditional treatment methods. Secondly, the manufacturing material and surface roughness of the cardiac stent are crucial to the therapeutic effect.
Next, Dr. Xiaoyou will introduce to youExcellent white light interferometer AM-7000 seriesAn application example of measuring the surface roughness of cardiac stents.1. What is a cardiac stent?
Cardiac stent, also called "coronary stent", is a commonly used medical device for cardiac interventional surgery. It is generally used to treat acute myocardial infarction, exertional angina, unstable angina, tetralogy of Fallot or other complex congenital heart diseases. For patients, cardiac stents can unblock blood vessels, expand narrow blood vessels, increase blood flow, and reduce myocardial ischemia and heart burden.
The emergence of cardiac stents has filled the gap in traditional treatment methods. In the past, the treatment of cardiovascular diseases mainly relied on drug therapy and open surgery, but there are certain limitations: drug treatment requires long-term use, has limited efficacy, and is prone to drug tolerance and side effects; while open surgery treatment involves surgical trauma. Surgery is more risky and requires a longer recovery period. In contrast, the emergence of cardiac stents provides patients with a more convenient, safe, and effective treatment option. First of all, cardiac stent surgery has less trauma, relatively fast recovery, and few postoperative complications, which can greatly reduce the patient's pain and recovery time; secondly, cardiac stent surgery has low risks, a high success rate, and relatively stable treatment effects. Can effectively improve patients' quality of life.
The main manufacturing materials of cardiac stents are stainless steel, cobalt-chromium alloy or nickel-titanium alloy. Among them, traditional cardiac stents are mainly simple metal mesh tubes, which can be selected and implanted according to the size and shape of the patient's blood vessels; there are also drug-coated cardiac stents, in which the drugs on the coating can be continuously released and inhibit the proliferation of pipeline cells. To effectively prevent blood vessel restenosis, prevent thrombosis, and improve the long-term effect of surgery.2. Measurement of surface roughness of cardiac stent
There are strict requirements for the production of cardiac stents. Among them, the surface roughness of the cardiac stent Ra>10μm will affect the mechanical properties, biocompatibility and transmission mode of the contact interface between the stent and the body. When 10nm
The following is usedExcellent white light interferometer AM-7000 seriesMeasurementHeart stent surface roughnessApplication cases:
Measurement of surface roughness of inner wall of cardiac stent
Measurement of surface roughness of cardiac stent outer wall
Excellent white light interferometer AM-7000 seriesAccuracy reaches sub-nanometer level;
The highest RMS repeatability can reach 0.002nm;
Equipped with piezoelectric ceramic devices, the maximum scanning speed is 400μm/second;
3200Hz plus the industry’s first SST+GAT algorithm,
Can complete up to 5 million point cloud collection instantly;
Covers common international standard measurement tools on the market,
Easily analyze 3D data with high efficiency and cope with applications in various industries.
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