Method and system for improving the effectiveness of medical stents by the application of gas cluster ion beam technology
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United States of America Patent
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Jan 13, 2004
Grant Date -
May 2, 2002
app pub date -
Jul 9, 2001
filing date -
Jul 10, 2000
priority date (Note) -
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Abstract
Numerous studies suggest that the current popular designs of coronary stents are functionally equivalent and suffer a 16 to 22 percent rate of restenosis. Although the use of coronary stents is growing, the benefits of their use remain controversial in certain clinical situations or indications due to their potential complications. The application of gas cluster ion beam (GCIB) surface modification such as smoothing or cleaning appears to reduce these complications and lead to genuine cost savings and an improvement in patient quality of life. The present invention is directed to the use of GCIB surface modification to overcome prior problems of thrombosis and restenosis. The atomic level surface smoothing of stents utilizing GCIB substantially reduces undesirable surface micro-roughness in medical coronary stents.
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